WO2022054933A1

WO2022054933A1 - Transparent laminated film, transparent laminated film with protection film, and face shield

Info

Publication number: WO2022054933A1
Application number: PCT/JP2021/033430
Authority: WO
Inventors: 了管家; 和雄笹本; 美希風間
Original assignee: 大日本印刷株式会社
Priority date: 2020-09-11
Filing date: 2021-09-10
Publication date: 2022-03-17

Abstract

A transparent laminated film (30) comprises a front surface anti-reflection layer (40) that constitutes a front surface (301) and a back surface anti-reflection layer (50) that constitutes a back surface (302).

Description

Transparent laminated film, transparent laminated film with protective film and face shield

This disclosure relates to a transparent laminated film, a transparent laminated film with a protective film, and a face shield.

Conventionally, a face shield for preventing droplets such as saliva due to sneezing or coughing from adhering to the face of a face-to-face person has been known (see, for example, Patent Document 1). Patent Document 1 discloses a face shield including a shield portion provided in front of the wearer's face and a frame for holding the shield portion.

Registered Utility Model No. 3227450

By the way, with such a face shield, the facial expression of the wearer may be difficult to see due to the reflection of light at the shield portion. In this way, when the facial expression of the wearer becomes difficult to see, for example, when communicating while looking at each other's facial expressions in face-to-face work such as hotel front desk work or financial institution consultation desk, communication There is a risk that the quality of the product will deteriorate. Further, the reflection of light has an effect that it becomes difficult for the wearer to visually recognize the surrounding structures and the like. For this reason, in work such as driving and assembling work while visually recognizing an object, it is required to improve the visibility in order to improve the efficiency of the work and the safety of the worker. For these reasons, for example, face shields are required to improve the invisibleness due to light reflection.

In addition, such a face shield may be worn by employees at the event venue. In this case, the face shield may be required to have a design in order to liven up the event. In addition, event participants may paint their faces to enhance the sense of unity at the event venue. In this case, ink or the like is often applied directly to the face of the participant, it takes time to form a design on the face, and it may take more time to remove the paint after the event. Therefore, there is a demand for a face shield that can improve the design.

Face shields are also used in medical settings. Then, for example, when strict management of epidemic prevention products is required in a medical field, it is desired to clearly display information indicating the affiliation of the wearer and the start date and time of use of the epidemic prevention products on the face shield. It is rare.

In addition, droplets such as saliva due to sneezing or coughing may be scattered not only in the direction facing the wearer but also in the left-right direction and the up-down direction as seen from the wearer. Further, when the droplets are scattered downward, the droplets may adhere to the structure (table or the like) used by the wearer, and the structure used by the wearer may be contaminated.

Furthermore, if the wearer wearing the face shield wears glasses, the glasses and the frame of the face shield may interfere with each other. Further, when the frame includes a member that crosses the front of the wearer, the frame may be too conspicuous, and another person who visually recognizes the wearer may feel a sense of discomfort.

The present disclosure has been made in consideration of such a point, and provides a transparent laminated film, a transparent laminated film with a protective film, and a face shield capable of effectively suppressing light reflection. The purpose.

In addition, the present disclosure has been made in consideration of such points, and is transparent with a transparent laminated film and a protective film, which can improve the design or clearly display characters and symbol information. It is an object of the present invention to provide a laminated film and a face shield.

Further, the present disclosure has been made in consideration of such a point, and provides a face shield and a transparent laminated film capable of suppressing downward droplets from adhering to surrounding structures. The purpose is to do.

Another object of the present disclosure is to provide a face shield and a transparent laminated film capable of suppressing the adhesion of droplets scattered from others to the wearer.

Further, the present disclosure has been made in consideration of such a point, and suppresses the interference between the spectacles and the holding member even when the wearer wears the spectacles, and also , It is an object of the present invention to provide a face shield capable of suppressing the holding member from becoming conspicuous.

The transparent laminated film according to one embodiment is a transparent laminated film including a front surface antireflection layer constituting the front surface and a back surface antireflection layer constituting the back surface.

In the transparent laminated film according to the embodiment, the transparent laminated film may further include a core layer located between the front surface antireflection layer and the back surface antireflection layer.

In the transparent laminated film according to the embodiment, the core layer may be made of polyethylene terephthalate.

In the transparent laminated film according to one embodiment, the transparent laminated film has a first transparent adhesive layer that adheres the front surface antireflection layer and the core layer, and a second that adheres the core layer and the back surface antireflection layer. A transparent adhesive layer may be further provided.

In the transparent laminated film according to the embodiment, the first transparent adhesive layer and the second transparent adhesive layer may each contain an acrylic pressure-sensitive adhesive.

In the transparent laminated film according to the embodiment, the transparent laminated film may further include a transparent adhesive layer for adhering the front surface antireflection layer and the back surface antireflection layer.

In the transparent laminated film according to the embodiment, the transparent adhesive layer may contain an acrylic pressure-sensitive adhesive.

In the transparent laminated film according to one embodiment, the front surface antireflection layer has a surface antireflection functional layer arranged in order from the front surface to the back surface, and a front surface transparent base material layer, and the back surface antireflection layer is , The back surface antireflection functional layer arranged in order from the back surface to the front surface, and the back surface transparent base material layer may be provided.

In the transparent laminated film according to one embodiment, the front surface antireflection functional layer is a coating layer coated on the front surface transparent base material layer, and the back surface antireflection functional layer is on the back surface transparent base material layer. It may be a coated coating layer.

In the transparent laminated film according to the embodiment, the front surface antireflection functional layer and the back surface antireflection functional layer may each be made of a cured product of an ionizing radiation curable resin composition.

In the transparent laminated film according to the embodiment, the ionizing radiation curable resin composition may contain a (meth) acrylate compound.

In the transparent laminated film according to one embodiment, the front surface antireflection functional layer includes a surface refraction layer arranged in order from the front surface to the back surface and a front surface hard coat layer, and the back surface antireflection functional layer is a back surface. It may include a back surface refraction layer and a back surface hard coat layer arranged in order from the surface to the front surface.

In the transparent laminated film according to one embodiment, the surface hard coat layer is a coating layer coated on the surface transparent base material layer, and the surface refraction layer is a coating coated on the surface hard coat layer. The back surface hard coat layer may be a coating layer coated on the back surface transparent base material layer, and the back surface refractive layer may be a coating layer coated on the back surface hard coat layer. ..

In the transparent laminated film according to one embodiment, the front surface refractive index layer includes a front surface low refractive index layer and a front surface high refractive index layer arranged in order from the front surface to the back surface, and the back surface refractive index layer is from the back surface. A back surface low refractive index layer and a back surface high refractive index layer arranged in order toward the front surface may be included.

In the transparent laminated film according to one embodiment, the front surface high refractive index layer includes a first surface high refractive index layer and a second surface high refractive index layer arranged in order from the front surface to the back surface, and the back surface thereof. The high refractive index layer may include a first back surface high refractive index layer and a second back surface high refractive index layer arranged in order from the back surface to the front surface.

In the transparent laminated film according to the embodiment, the refractive index of the first surface high refractive index layer is higher than the refractive index of the second surface high refractive index layer, and the refractive index of the first back surface high refractive index layer is higher. , It may be higher than the refractive index of the second back surface high refractive index layer.

In the transparent laminated film according to the embodiment, the front surface transparent base material layer and the back surface transparent base material layer may contain triacetyl cellulose or polyethylene terephthalate.

In the transparent laminated film according to one embodiment, the front surface transparent base material layer and the back surface transparent base material layer may contain triacetyl cellulose on one side and polyester on the other side.

In the transparent laminated film according to the embodiment, the front surface transparent base material layer and the back surface transparent base material layer may each contain polyester.

The thickness of the transparent laminated film according to the embodiment may be 40 μm or more and 500 μm or less.

The transparent laminated film according to the embodiment may have a restorative function.

In the transparent laminated film according to one embodiment, the reflectance of light may be 1.0% or less, and the total light transmittance may be 90% or more.

In the transparent laminated film according to the embodiment, the transmittance in the ultraviolet region having a wavelength of 380 nm or less may be 1.0% or less.

In the transparent laminated film according to one embodiment, the bending stress may be 6N / 20 mm or less.

The transparent laminated film according to the embodiment may be used as a face shield that protects the wearer's face.

An opening is formed in the transparent laminated film according to the embodiment, and the opening may have a radius of curvature of 0.5 mm or more at all points on the peripheral edge.

In the transparent laminated film according to the embodiment, the opening may have an oval shape, an elliptical shape, or a rounded corner shape.

The transparent laminated film with a protective film according to one embodiment includes a transparent laminated film according to one embodiment, a front surface protective film that protects the front surface of the transparent laminated film, and a back surface protection that protects the back surface of the transparent laminated film. A transparent laminated film with a protective film, which comprises a film.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. , A face shield comprising a transparent laminated film according to one embodiment.

In the face shield according to the embodiment, the holding member extends downward from the pair of temples that abut on the wearer's ears, the front portion that connects the pair of temples to each other, and the front portion. It may have a pair of pad portions that come into contact with the wearer's nose.

In the face shield according to the embodiment, the holding member may have a band that covers the wearer's head in a circumferential shape.

In the face shield according to one embodiment, the holding member has a chin pad that abuts on the wearer's chin and a pair of hooking portions that are connected to the chin pad and hooked on the wearer's ears. However, the transparent laminated film may at least cover the wearer's chin.

The transparent laminated film according to one embodiment is a transparent laminated film having a front surface and a back surface, and covers a core layer and a part of the front surface side surface or a part of the back surface side surface of the core layer. A transparent laminated film having at least a print layer and having a visual reflectance Y value of 0.0% or more and 2.0% or less in a region where the print layer is not provided.

In the transparent laminated film according to one embodiment, even if the reflectance of light having a wavelength of 550 nm is 2% or less and the total light transmittance is 90% or more in the region where the print layer is not provided. good.

In the transparent laminated film according to the embodiment, the transmittance in the ultraviolet region having a wavelength of 380 nm or less may be 1.0% or less in the region where the print layer is not provided.

In the transparent laminated film according to the embodiment, the core layer may contain polyethylene terephthalate.

In the transparent laminated film according to one embodiment, a surface antireflection layer provided on one side of the core layer and constituting the front surface and a back surface reflection provided on the other side of the core layer and constituting the back surface. The print layer may be further provided with an anti-reflection layer, and the print layer may be provided between the core layer and the surface anti-reflection layer.

In the transparent laminated film according to one embodiment, a surface antireflection layer provided on one side of the core layer and constituting the front surface and a back surface reflection provided on the other side of the core layer and constituting the back surface. The print layer may be further provided with an antireflection layer, and the print layer may be provided between the core layer and the back surface antireflection layer.

The transparent laminated film according to the embodiment is provided between the front surface antireflection layer constituting the front surface, the back surface antireflection layer constituting the back surface, the front surface antireflection layer, and the back surface antireflection layer. A transparent laminated film having a print layer that covers a part of the surface antireflection layer and having a visual reflectance Y value of 0.0% or more and 2.0% or less in a region where the print layer is not provided. Is.

In the transparent laminated film according to one embodiment, the front surface antireflection layer has a surface antireflection functional layer arranged in order from the front surface toward the back surface, and a front surface transparent base material layer, and the back surface antireflection layer is provided. The layer may have a back surface antireflection functional layer arranged in order from the back surface toward the front surface, and a back surface transparent base material layer.

In the transparent laminated film according to one embodiment, the front surface antireflection functional layer includes a surface refraction layer arranged in order from the front surface toward the back surface, and a front surface hard coat layer, and the back surface antireflection functional layer is , The back surface refractive layer arranged in order from the back surface toward the front surface, and the back surface hard coat layer may be included.

In the transparent laminated film according to one embodiment, the front surface refractive index layer includes a front surface low refractive index layer and a front surface high refractive index layer arranged in order from the front surface toward the back surface, and the back surface refractive index layer is: A back surface low refractive index layer and a back surface high refractive index layer arranged in order from the back surface toward the front surface may be included.

In the transparent laminated film according to one embodiment, the surface high refractive index layer includes a first surface high refractive index layer and a second surface high refractive index layer arranged in order from the front surface toward the back surface. The back surface high refractive index layer may include a first back surface high refractive index layer and a second back surface high refractive index layer arranged in order from the back surface toward the front surface.

In the face shield according to the embodiment, the print layer may be provided at a position overlapping the cheek of the wearer in front view.

In the face shield according to the embodiment, the distance between the wearer's nose and the holding member may be 100 mm or less when the wearer wears the face shield.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. A transparent laminated film is provided, wherein the transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side, and at least on the lower side. , A plurality of first cut portions are formed, a first engaging portion is formed on one side of the first cut portion, and the first engaging portion is locked on the other side of the first cut portion. A first locking portion is formed, and by locking the first engaging portion to the first locking portion, the first engaging portion is curved so as to be convex toward the side away from the wearer in the vicinity of the lower side. A face shield on which a first curved surface is formed.

In the face shield according to one embodiment, a plurality of second cut portions are formed on the upper side thereof, a second engaging portion is formed on one side of the second cut portion, and the other of the second cut portions is formed. A second locking portion for locking the second engaging portion is formed on the side, and by locking the second engaging portion to the second locking portion, the said A second curved surface that is curved so as to be convex toward the side away from the wearer may be formed.

In the face shield according to the embodiment, the first engaging portion is locked to the first locking portion, and the second engaging portion is locked to the second locking portion. A third curved surface that curves so as to be convex toward the wearer may be formed between the first curved surface and the second curved surface.

In the face shield according to the embodiment, the third curved surface may have a linear shape in a vertical cross section.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. The transparent laminated film includes a transparent laminated film, and the transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side, and is in the vicinity of the lower side. A first lower panel and a second lower panel arranged along the extending direction of the lower side are provided, and the first lower panel and the first lower panel are provided on the upper side side of the first lower panel and the second lower panel. A lower fixing panel for fixing the second lower panel is provided, and the first lower panel and the second lower panel are separated from each other by a first lower notch portion penetrating the transparent laminated film, and the first lower panel is separated from each other. And the lower fixing panel is separated from each other by a second lower notch penetrating the transparent laminated film, and the second lower panel and the lower fixing panel are separated from each other by a third lower notch penetrating the transparent laminated film. The first lower panel and the second lower panel are separated from each other and fixed to the lower fixing panel in a state where the first lower panel and the second lower panel are overlapped with each other so as to be convex in the vicinity of the lower side toward the side away from the wearer. It is a face shield in which a first lower curved surface curved to the surface is formed.

In the face shield according to one embodiment, a third lower panel and a fourth lower panel arranged along the extending direction of the lower side are provided on the lower side of the first lower panel and the second lower panel. The third lower panel and the fourth lower panel are separated from each other by a fourth lower notch portion penetrating the transparent laminated film, and the first lower panel and the third lower panel penetrate the transparent laminated film. The second lower panel and the fourth lower panel are separated from each other by the fifth lower cut portion, and the third lower panel and the fourth lower panel are separated from each other by the sixth lower cut portion penetrating the transparent laminated film. A second lower curved surface that bends to the outside of the first lower curved surface so as to be convex toward the side away from the wearer by fixing the lower panel to the lower fixed panel in a state of being overlapped with each other. May be formed.

In the face shield according to the embodiment, the fourth lower notch may extend from the lower side.

In the face shield according to one embodiment, a first upper panel and a second upper panel arranged along the extending direction of the upper side are provided in the vicinity of the upper side, and the first upper panel and the second upper panel are provided. An upper fixing panel for fixing the first upper panel and the second upper panel is provided on the lower side thereof, and the first upper panel and the second upper panel penetrate the transparent laminated film. The first upper panel and the upper fixing panel are separated from each other by the upper notch, the second upper panel and the upper fixing panel are separated from each other by the second upper notch penetrating the transparent laminated film, and the second upper panel and the upper fixing panel are separated from each other. The first upper panel and the second upper panel are separated from each other by a third upper notch portion penetrating the transparent laminated film, and the first upper panel and the second upper panel are overlapped with each other and fixed to the upper fixing panel in the vicinity of the upper side. In addition, a first upper curved surface that is curved so as to be convex toward the side away from the wearer may be formed.

In the face shield according to one embodiment, a third upper panel and a fourth upper panel arranged along the extending direction of the upper side are provided on the upper side side of the first upper panel and the second upper panel. The third upper panel and the fourth upper panel are separated from each other by a fourth upper notch portion penetrating the transparent laminated film, and the first upper panel and the third upper panel penetrate the transparent laminated film. The second upper panel and the fourth upper panel are separated from each other by the fifth upper notch, and the third upper panel and the fourth upper panel are separated from each other by the sixth upper notch penetrating the transparent laminated film. A second upper curved surface that curves outward from the first upper curved surface so as to be convex toward the side away from the wearer by fixing the upper panel to the upper fixing panel in a state of being overlapped with each other. May be formed.

In the face shield according to the embodiment, the fourth upper notch may extend from the upper side.

In the face shield according to the embodiment, the first lower panel and the second lower panel are fixed to the lower fixing panel, and the first upper panel and the second upper panel are fixed to the upper fixing panel. By fixing, an intermediate curved surface that curves so as to be convex toward the wearer may be formed between the first lower curved surface and the first upper curved surface.

In the face shield according to the embodiment, the curved surface of the intermediate portion may have a linear shape in a vertical cross section.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. The transparent laminated film includes a transparent laminated film, and the transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side, and the transparent laminated film. A pair of first mountain fold portions extending from the upper side and a pair of first valley fold portions extending from the upper side and provided between the pair of the first mountain fold portions are formed therein. The first mountain fold portion extends along the extending direction of the side side, and the pair of the first valley fold portions are separated from each other from the upper side side toward the lower side side. Extending along a direction inclined in the extending direction, the transparent laminated film is folded along the pair of the first mountain folds and the pair of the first valley folds to the front surface and above the front surface. It is a face shield provided and formed with an upper surface folded from the front surface to the rear.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. The transparent laminated film includes a transparent laminated film, and the transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side, and the transparent laminated film. A pair of second mountain fold portions extending from the lower side and a pair of second valley fold portions extending from the lower side and provided between the pair of the second mountain fold portions are formed therein. The second mountain fold portion extends along the extending direction of the side side, and the pair of the second valley fold portions are separated from each other from the lower side side toward the upper side side. Extending along a direction inclined in the extending direction, the transparent laminated film is folded along the pair of the second mountain folds and the pair of the second valley folds to the front surface and the lower side of the front surface. It is a face shield provided and formed with a lower surface folded from the front surface to the rear.

In the face shield according to the embodiment, the transparent laminated film has a pair of first mountain fold portions extending from the upper side and a pair of first mountain fold portions extending from the upper side and provided between the pair of first mountain fold portions. A valley fold portion is formed, the pair of the first mountain fold portions extend along the extending direction of the side side, and the pair of the first valley fold portions are from the upper side to the lower side. The transparent laminated film extends along a direction inclined in the extending direction of the side side so as to be separated from each other toward the direction of the transparent laminated film along the pair of the first mountain folds and the pair of the first valley folds. By folding the front surface, an upper surface may be provided above the front surface and folded rearward from the front surface.

In the face shield according to the embodiment, the transparent laminated film is folded along the pair of the first mountain folds and the pair of the first valley folds, and the pair of the second mountain folds and the pair of the above. By folding along the second valley fold portion, a side surface extending rearward from the front surface may be formed on the side surface of the front surface.

In the face shield according to the embodiment, the holding member includes a pair of mounting portions for holding the transparent laminated film, and the mounting portions are inserted in the vicinity of the pair of side sides of the transparent laminated film. The opening to be formed may be formed.

In the face shield according to the embodiment, the holding member may hold the transparent laminated film so as to be movable in the vertical direction.

In the face shield according to the embodiment, the light reflectance of the transparent laminated film may be 1.0% or less.

The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the wearer's face, and extends between an upper side, a lower side facing the upper side, and the upper side and the lower side. It has a rectangular shape having a pair of side sides, and a plurality of first cut portions are formed at least on the lower side, and a first engagement portion is formed on one side of the first cut portion, and the first A first locking portion for locking the first engaging portion is formed on the other side of the notch portion, and by locking the first engaging portion to the first locking portion, the lower side thereof is formed. It is a transparent laminated film in which a first curved surface that curves so as to be convex toward the side away from the wearer is formed in the vicinity thereof.

In the transparent laminated film according to one embodiment, a plurality of second cut portions are formed on the upper side thereof, and a second engaging portion is formed on one side of the second cut portion, and the second cut portion is formed. A second locking portion for locking the second engaging portion is formed on the other side, and by locking the second engaging portion to the second locking portion, the second engaging portion is placed in the vicinity of the upper side. A second curved surface that is curved so as to be convex toward the side away from the wearer may be formed.

In the transparent laminated film according to one embodiment, the first engaging portion is locked to the first locking portion, and the second engaging portion is locked to the second locking portion. A third curved surface that curves so as to be convex toward the wearer may be formed between the first curved surface and the second curved surface.

In the transparent laminated film according to the embodiment, the third curved surface may have a linear shape in a vertical cross section.

The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the wearer's face, and extends between the upper side, the lower side facing the upper side, and the upper side and the lower side. It has a rectangular shape having a pair of side sides, and a first lower panel and a second lower panel arranged along the extending direction of the lower side are provided in the vicinity of the lower side, and the first lower panel and the first lower panel are provided. 2. A lower fixing panel for fixing the first lower panel and the second lower panel is provided on the upper side of the lower panel, and the first lower panel and the second lower panel penetrate the transparent laminated film. The first lower panel and the lower fixing panel are separated from each other by the first lower notch, and the second lower panel and the lower fixing panel are separated from each other by the second lower notch penetrating the transparent laminated film. Is separated from each other by a third lower notch portion penetrating the transparent laminated film, and the first lower panel and the second lower panel are overlapped with each other and fixed to the lower fixing panel. It is a transparent laminated film in which a first lower curved surface that curves so as to be convex toward the side away from the wearer is formed in the vicinity of the lower side.

In the transparent laminated film according to one embodiment, a third lower panel and a fourth lower panel arranged along the extending direction of the lower side are provided on the lower side of the first lower panel and the second lower panel. The third lower panel and the fourth lower panel are separated from each other by a fourth lower notch portion penetrating the transparent laminated film, and the first lower panel and the third lower panel have the transparent laminated film. The second lower panel and the fourth lower panel are separated from each other by the fifth lower cut portion penetrating the transparent laminated film, and the third lower panel and the fourth lower panel are separated from each other by the sixth lower cut portion penetrating the transparent laminated film. 4 By fixing the lower panel to the lower fixing panel in a state of being overlapped with each other, the second lower curved surface is curved so as to be convex to the side away from the wearer to the outside of the first lower curved surface. A surface may be formed.

In the transparent laminated film according to the embodiment, the fourth lower cut portion may extend from the lower side.

In the transparent laminated film according to one embodiment, a first upper panel and a second upper panel arranged along the extending direction of the upper side are provided in the vicinity of the upper side, and the first upper panel and the second upper part are provided. An upper fixing panel for fixing the first upper panel and the second upper panel is provided on the lower side of the panel, and the first upper panel and the second upper panel penetrate the transparent laminated film. The first upper panel and the upper fixing panel are separated from each other by one upper notch, the first upper panel and the upper fixing panel are separated from each other by a second upper notch penetrating the transparent laminated film, and the second upper panel and the upper fixing panel are separated from each other. The first upper panel and the second upper panel are separated from each other by a third upper notch portion penetrating the transparent laminated film, and are fixed to the upper fixing panel in a state where the first upper panel and the second upper panel are overlapped with each other. A first upper curved surface that curves so as to be convex toward the side away from the wearer may be formed in the vicinity.

In the transparent laminated film according to one embodiment, a third upper panel and a fourth upper panel arranged along the extending direction of the upper side are provided on the upper side side of the first upper panel and the second upper panel. The third upper panel and the fourth upper panel are separated from each other by a fourth upper notch portion penetrating the transparent laminated film, and the first upper panel and the third upper panel have the transparent laminated film. The second upper panel and the fourth upper panel are separated from each other by the fifth upper notch portion penetrating the transparent laminated film, and the third upper panel and the fourth upper panel are separated from each other by the sixth upper notch portion penetrating the transparent laminated film. 4 By fixing the upper panel to the upper fixing panel in a state of being overlapped with each other, the second upper bending is curved so as to be convex to the outside of the first upper curved surface toward the side away from the wearer. A surface may be formed.

In the transparent laminated film according to the embodiment, the fourth upper cut portion may extend from the upper side.

In the transparent laminated film according to the embodiment, the first lower panel and the second lower panel are fixed to the lower fixing panel, and the first upper panel and the second upper panel are fixed to the upper fixing panel. By fixing to, an intermediate curved surface that curves so as to be convex toward the wearer may be formed between the first lower curved surface and the first upper curved surface.

In the transparent laminated film according to the embodiment, the curved surface of the intermediate portion may have a linear shape in a vertical cross section.

The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the wearer's face, and extends between the upper side, the lower side facing the upper side, and the upper side and the lower side. It has a rectangular shape with a pair of side sides, a pair of first mountain folds extending from the upper side, and a pair of first valley folds extending from the upper side and provided between the pair of first mountain folds. The portions are formed, and the pair of the first mountain fold portions extend along the extending direction of the side sides, and the pair of the first valley fold portions extend from the upper side to the lower side. The front surface and said It is a transparent laminated film provided above the front surface and formed with an upper surface folded from the front surface to the rear.

The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the wearer's face, and extends between the upper side, the lower side facing the upper side, and the upper side and the lower side. It has a rectangular shape with a pair of side sides, a pair of second mountain folds extending from the lower side, and a pair of second valley folds extending from the lower side and provided between the pair of second mountain folds. The portions are formed, and the pair of the second mountain fold portions extend along the extending direction of the side sides, and the pair of the second valley fold portions extend from the lower side to the upper side. The front surface and said It is a transparent laminated film provided below the front surface and formed with a lower surface folded from the front surface to the rear.

In the transparent laminated film according to one embodiment, a pair of first mountain fold portions extending from the upper side and a pair of first valley fold portions extending from the upper side and provided between the pair of first mountain fold portions. Is formed, the pair of the first mountain folds extends along the extending direction of the side, and the pair of the first valley folds are separated from each other from the upper side toward the lower side. As such, it extends above the front surface by extending along a direction inclined in the extending direction of the side surface and folding along the pair of the first mountain folds and the pair of the first valley folds. An upper surface that is folded backward from the front surface may be formed.

In the transparent laminated film according to the embodiment, the pair of the first mountain fold portions and the pair of the first valley fold portions are folded, and the pair of the second mountain fold portions and the pair of the second valley fold portions are folded. By folding along the front surface, a side surface extending rearward from the front surface may be formed on the side surface of the front surface.

In the transparent laminated film according to one embodiment, the reflectance of light may be 1.0% or less.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. The transparent laminated film includes a transparent laminated film, and the transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side, and is in the vicinity of the lower side. This is a face shield in which a first curved surface that is curved so as to be convex toward the side away from the wearer is formed in the vicinity of the lower side of the face shield.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. The transparent laminated film includes a transparent laminated film, and the transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side, and is in the vicinity of the upper side. Is a face shield in which a second curved surface that is curved so as to be convex toward the side away from the wearer is formed in the vicinity of the upper side of the face shield.

The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the wearer's face, and extends between the upper side, the lower side facing the upper side, and the upper side and the lower side. By having a rectangular shape having a pair of side sides and bending the vicinity of the lower side, a first curved surface that is curved so as to be convex toward the side away from the wearer is formed in the vicinity of the lower side. , A transparent laminated film.

The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the wearer's face, and extends between the upper side, the lower side facing the upper side, and the upper side and the lower side. By having a rectangular shape having a pair of side sides and bending the vicinity of the upper side, a second curved surface that is curved so as to be convex toward the side away from the wearer is formed in the vicinity of the upper side. , A transparent laminated film.

The face shield according to one embodiment is a face shield that protects the wearer's face, and is attached to the holding member and the holding member to cover at least a part of the wearer's face. The holding member includes a transparent laminated film, and the holding member includes a pair of temple portions including an ear hook portion to be attached to the wearer's ear, and a connecting portion for connecting the pair of temple portions to each other from the rear of the wearer. In front of the wearer, no other member extending between the pair of temples is arranged, which is a face shield.

In the face shield according to one embodiment, the pair of temples extend in parallel with each other in front of the ear hook, or the distance between the pair of temples increases as the temples move forward. It may be extended as such.

In the face shield according to one embodiment, the force required to widen each temple portion in a direction away from each other so that the distance between the tips of the temple portions is 130 mm is 0.01 N or more 3 It is preferably 0.0 N or less.

In the face shield according to the embodiment, a weight for adjusting the inclination of the temple portion with respect to the horizontal direction may be attached to the connecting portion.

In the face shield according to the embodiment, the temple portion and the connecting portion may be integrally molded.

In the face shield according to the embodiment, the connecting portion may be provided separately from the temple portion, and the inclination of the temple portion with respect to the horizontal direction may be adjusted.

In the face shield according to the embodiment, the holding member may be made of a metal rod-shaped member.

In the face shield according to the embodiment, the metal may be aluminum.

In the face shield according to the embodiment, the holding member may be made of a resin rod-shaped member.

In the face shield according to the embodiment, the resin may be made of a resin selected from polyethylene terephthalate, polycarbonate, and acrylic resin.

In the face shield according to the embodiment, the temple portion is provided in front of the ear hook portion and includes a pair of mounting portions for holding the transparent laminated film, and the mounting portion is attached to the transparent laminated film. An opening to be inserted may be formed.

According to the present disclosure, the reflection of light can be effectively suppressed.

Further, according to the present disclosure, it is possible to improve the design of the transparent laminated film and the face shield, or to clearly display characters and symbol information on the transparent laminated film and the face shield.

According to the present disclosure, it is possible to prevent the droplets scattered downward from adhering to the surrounding structure.

Further, according to the present disclosure, it is possible to prevent the droplets scattered from others from adhering to the wearer.

According to the present disclosure, even when the wearer wears spectacles, it is possible to prevent the spectacles from interfering with the holding member and to prevent the holding member from becoming conspicuous.

FIG. 1 is a perspective view showing a face shield according to the first embodiment. FIG. 2A is a top view showing a face shield according to the first embodiment. FIG. 2B is a perspective view showing a holding member of the face shield according to the first embodiment. FIG. 2C1 is a front view showing a shield portion of the face shield according to the first embodiment. FIG. 2C2 is a front view showing a face shield according to the first embodiment. FIG. 2D is a side view showing a face shield according to the first embodiment. FIG. 2E is an enlarged side view showing a part of the face shield according to the first embodiment. FIG. 2F is an enlarged cross-sectional view showing a part of the cross section of the face shield according to the first embodiment. FIG. 3A is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the first embodiment. FIG. 3B is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the first embodiment. FIG. 3C is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the first embodiment. FIG. 3D is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the first embodiment. FIG. 3E is a front view showing an example of the shape of the opening formed in the transparent laminated film according to the first embodiment. FIG. 3F is a front view showing an example of the shape of the opening formed in the transparent laminated film according to the first embodiment. FIG. 3G is a front view showing an example of the shape of the opening formed in the transparent laminated film according to the first embodiment. FIG. 4A is a perspective view showing a modified example of the face shield according to the first embodiment. FIG. 4B is a perspective view showing a modified example of the face shield according to the first embodiment. FIG. 5 is a perspective view showing an example of using the transparent laminated film according to the first embodiment. FIG. 6 is a diagram illustrating a bending stress measurement test according to an embodiment. FIG. 7 is a front view showing a test piece used for the pseudo-fracture test according to the embodiment. FIG. 8 is a diagram illustrating a pseudo-fracture test according to an example. FIG. 9 is a perspective view showing a face shield according to the second embodiment. FIG. 10 is a front view showing a shield portion of the face shield according to the second embodiment. FIG. 11A is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11B is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11C is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11D is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11E is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11F is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11G is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11H is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11I is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 11J is a cross-sectional view showing an example of the layer structure of the transparent laminated film with a protective film according to the second embodiment. FIG. 12 is a perspective view showing a modified example of the face shield according to the second embodiment. FIG. 13 is a perspective view showing a modified example of the face shield according to the second embodiment. FIG. 14 is a perspective view showing another usage example of the transparent laminated film according to the second embodiment. FIG. 15 is a front view showing the transparent laminated film of FIG. FIG. 16 is a perspective view showing a face shield according to the first embodiment of the third embodiment. FIG. 17 is a front view showing a face shield according to the first embodiment of the third embodiment. FIG. 18 is a perspective view showing a holding member of the face shield according to the first embodiment of the third embodiment. FIG. 18A is a plan view showing a holding member of the face shield according to the first embodiment of the third embodiment. FIG. 18B is a plan view showing another example of the holding member of the face shield according to the first embodiment of the third embodiment. FIG. 19 is a front view showing a transparent laminated film according to the first embodiment of the third embodiment, which is an assembled transparent laminated film. FIG. 20 is a bottom view showing a transparent laminated film according to the first embodiment of the third embodiment, and shows an assembled transparent laminated film. FIG. 21 is a plan view showing a transparent laminated film according to the first embodiment of the third embodiment, which is an assembled transparent laminated film. FIG. 22 is a side view showing a transparent laminated film according to the first embodiment of the third embodiment, which is an assembled transparent laminated film. FIG. 23 is a developed view showing a transparent laminated film according to the first embodiment of the third embodiment. FIG. 24 is a perspective view showing a modified example of the holding member of the face shield according to the first embodiment of the third embodiment. FIG. 25 is a front view showing a connecting portion of a modified example of the holding member of the face shield according to the first embodiment of the third embodiment. FIG. 26 is a perspective view showing a face shield according to the second embodiment of the third embodiment. FIG. 27 is a front view showing a face shield according to the second embodiment of the third embodiment. FIG. 28 is a bottom view showing the transparent laminated film according to the second embodiment of the third embodiment, and shows the assembled transparent laminated film. FIG. 29 is a plan view showing a transparent laminated film according to the second embodiment of the third embodiment, and shows the transparent laminated film in an assembled state. FIG. 30 is a side view showing the transparent laminated film according to the second embodiment of the third embodiment, and shows the transparent laminated film in an assembled state. FIG. 31 is a developed view showing a transparent laminated film according to the second embodiment of the third embodiment. FIG. 32 is a perspective view showing a face shield according to the third embodiment of the third embodiment. FIG. 33 is a front view showing a face shield according to the third embodiment of the third embodiment. FIG. 34 is a bottom view showing the transparent laminated film according to the third embodiment of the third embodiment, and shows the transparent laminated film in an assembled state. FIG. 35 is a plan view showing a transparent laminated film according to the third embodiment of the third embodiment, and shows the transparent laminated film in an assembled state. FIG. 36 is a side view showing the transparent laminated film according to the third embodiment of the third embodiment, and shows the transparent laminated film in an assembled state. FIG. 37 is a developed view showing a transparent laminated film according to the third embodiment of the third embodiment.

(First Embodiment)
Hereinafter, the first embodiment will be described with reference to the drawings. 1 to 3G are diagrams showing the first embodiment. Each figure shown below is a diagram schematically shown. Therefore, the size and shape of each part are exaggerated as appropriate to facilitate understanding. In addition, it can be changed and implemented as appropriate within the range that does not deviate from the technical idea. In each of the figures shown below, the same parts are designated by the same reference numerals, and some detailed description may be omitted. Further, the numerical values such as the dimensions of each member and the material names described in the present specification are examples of the embodiments, and the present invention is not limited to these, and can be appropriately selected and used. In the present specification, terms that specify a shape or a geometric condition, such as parallel, orthogonal, and vertical, are to be interpreted to include substantially the same state in addition to the strict meaning.

Face Shield First, the face shield 10 provided with the transparent laminated film 30 according to the present embodiment will be described with reference to FIGS. 1 and 2A. The face shield 10 is for protecting the face F of the wearer H.

As shown in FIGS. 1 and 2A, the face shield 10 has a holding member 20 attached to the wearer H and a shield portion 30A attached to the holding member 20 and covering at least a part of the face F of the wearer H ( It is provided with a transparent laminated film 30). Of these, the holding member 20 extends downward from the pair of temples 21 that abut the ear E of the wearer H, the front portion 22 that connects the pair of temples 21 to each other, and the wearer H. It has a pair of pad portions 23 that come into contact with the nose N. In the present embodiment, the holding member 20 is a so-called eyeglass frame type.

As shown in FIG. 2A, such a holding member 20 has a desired gap between the nose N, mouth, etc. of the wearer H and the shield portion 30A when the wearer H wears the face shield 10. The shield portion 30A is held so as to be formed.

When the wearer H wears the face shield 10, the distance D1 (see FIG. 2A) between the wearer H's nose N and the shield portion 30A may be 3 mm or more and 150 mm or less, and 5 mm or more and 100 mm or less. Is preferable. When the distance D1 is 3 mm or more, it is possible to prevent the transparent laminated film 30 constituting the shield portion 30A from coming into contact with the face F of the wearer H when the wearer H moves his / her head. .. Therefore, even if the wearer H wears the face shield 10, the wearer H can concentrate on the work without feeling stress. Further, since the distance D1 is 150 mm or less, when the wearer H moves his / her head, the transparent laminated film 30 constituting the shield portion 30A may come into contact with surrounding structures or others. Can be suppressed. Further, when the distance D1 is 150 mm or less, it is possible to prevent the face shield 10 from becoming too heavy. Therefore, even if the wearer H wears the face shield 10, the wearer H can concentrate on the work without feeling stress. Furthermore, when the distance D1 is 150 mm or less, droplets such as saliva due to sneezing or coughing of the wearer H adhere to the face of another person, and droplets such as saliva due to sneezing or coughing of another person adhere to the face of the wearer H. It can effectively suppress the adhesion to the face of the sneeze. Further, when the distance D1 is 100 mm or less, the transparent laminated film 30 constituting the shield portion 30A may come into contact with surrounding structures or others when the wearer H moves his / her head. It can be suppressed more effectively. Further, when the distance D1 is 100 mm or less, it is possible to more effectively suppress the weight of the face shield 10 from becoming too large. Therefore, even if the wearer H wears the face shield 10, the wearer H can concentrate on the work without feeling stress. Furthermore, when the distance D1 is 100 mm or less, droplets such as saliva due to sneezing or coughing of the wearer H adhere to the face of another person, and droplets such as saliva due to sneezing or coughing of another person adhere to the face of the wearer H. It is possible to more effectively suppress the adhesion to the face of the sneeze.

The material of the holding member 20 is not limited, but the holding member 20 may be made of resin from the viewpoints of flexibility, weight reduction, ease of procurement, and the like. The resin material used for the holding member 20 can be selected from resin materials used for general purposes. For example, the resin may consist of a resin selected from polyethylene terephthalate, polycarbonate, and acrylic resin.

The shield portion 30A suppresses that droplets such as saliva due to sneezing and coughing of the wearer H adhere to the face of another person, and that droplets such as saliva due to sneezing and coughing of another person adhere to the face F of the wearer H. Play a role. The shield portion 30A is made of a transparent laminated film 30. In the present embodiment, the shield portion 30A covers the entire face F of the wearer H. The shield portion 30A may cover only a part of the face F of the wearer H.

The shape of the shield portion 30A is arbitrary, and the shield portion 30A may have a rectangular shape, a rectangular shape with rounded corners, an elliptical shape, or the like. The size of the shield portion 30A is preferably a certain size or more from the viewpoint of preventing the scattering of droplets, and preferably a square size of 10 cm square or more. Further, from the viewpoint of not interfering with the operation of the wearer H, it is preferable to have a size of 40 cm square or less.

The shield portion 30A may be attached to the holding member 20 via an attachment member (not shown). Alternatively, for example, the holding member 20 may be provided with an engaging portion such as a protrusion, and the shield portion 30A may be provided with an engaged portion such as a through hole. Then, the shield portion 30A may be attached to the holding member 20 by engaging the engaged portion with the engaging portion.

An example of the engaged portion provided in the holding member 20 and the engaged portion provided in the shield portion 30A will be described.

FIG. 2B is a perspective view showing the holding member 20 of the face shield 10. As described above, the holding member 20 has a pair of temple portions 21, a front portion 22, and a pad portion 23. Then, as shown in FIG. 2B, the pair of temple portions 21 are connected to the front portion 22 via the hinge portions 21a, respectively. As a result, even when the shield portion 30A is attached to the holding member 20, each of the pair of temple portions 21 is configured to be foldable with respect to the front portion 22. Therefore, the face shield 10 can be compactly stored without removing the shield portion 30A from the holding member 20. Further, the holding member 20 is provided with an engaging portion 29. In the example shown in FIG. 2B, the front portion 22 has an inner surface 22a located on the wearer H side when the wearer H wears the face shield 10, and an outer surface 22b located on the side opposite to the inner surface 22a. The engaging portion 29 is provided on the outer surface 22b of the front portion 22.

In the example shown in FIG. 2B, a first engaging portion 291 is provided as an engaging portion 29 in the vicinity of the connecting portion with one of the pair of temple portions 21 in the front portion 22. Further, a second engaging portion 292 is provided as an engaging portion 29 in the vicinity of the connecting portion of the front portion 22 to the other of the pair of temple portions 21. By providing the engaging portion 29 on the front portion 22 in this way, as described above, even when the shield portion 30A is attached to the holding member 20, the temple portion 21 is attached to the front portion 22. Can be folded.

Further, FIG. 2C1 is a front view showing the shield portion 30A of the face shield 10. In the example shown in FIG. 2C1, an opening 33a is formed in the shield portion 30A as the engaged portion 33. In the example shown in FIG. 2C1, the shield portion 30A has a rectangular shape with rounded corners. Then, in the vicinity of one of the pair of short sides of the substantially rectangular shield portion 30A (the sides extending in the vertical direction when the wearer H wears the face shield 10), the first covered portion 33 is used as the engaged portion 33. An engaging portion 331 is provided. Further, a second engaged portion 332 is provided as an engaged portion 33 in the vicinity of the other of the pair of short sides of the substantially rectangular shield portion 30A. As described above, the shield portion 30A is formed with two openings 33a.

The opening 33a is formed so that the major axis direction is substantially parallel to the vertical direction when the wearer H wears the face shield 10. The width w1 of the opening 33a in the major axis direction may be 3 mm or more and 20 mm or less. Further, the width w2 of the opening 33a in the minor axis direction may be 1 mm or more and 10 mm or less.

Further, in the shield portion 30A, a recess 34 recessed inward is formed on the outside of each opening 33a. As a result, as shown in FIG. 2C2, when the shield portion 30A is attached to the holding member 20, the portion below the opening 33a can be widened so as to become wider toward the lower side. Therefore, the shield portion 30A can surely cover the vicinity of the wearer H's mouth, and droplets such as saliva due to sneezing or coughing may adhere to the face of another person, or droplets such as saliva due to sneezing or coughing of another person. Can be effectively suppressed from adhering to the face of the wearer H. The height H of the recess 34 may be about the same as the width w1 of the opening 33a in the long axis direction, or may be 3 mm or more and 20 mm or less. The outside means the side of the shield portion 30A away from the central axis CL, and the inside means the side approaching the center axis CL.

FIG. 2D is a side view showing the face shield 10 as viewed from the direction IID of FIG. 2A. By engaging the first engaged portion 331 and the first engaging portion 291 and engaging the second engaged portion 332 and the second engaging portion 292, FIG. 2D shows. As shown, the shield portion 30A can be attached to the holding member 20.

The specific mode of engagement between the engaged portion 33 and the engaging portion 29 will be further described with reference to FIGS. 2E and 2F. FIG. 2E is an enlarged side view showing a portion surrounded by the alternate long and short dash line with reference numeral IIE in FIG. 2D. FIG. 2F is a diagram showing a part of a cross section taken along the line IIF-IIF of FIG. 2E. In the example shown in FIG. 2F, the engaging portion 29 includes a first arm portion 29a extending from the front portion 22, a second arm portion 29b extending from the first arm portion 29a, and a protrusion 29c provided on the second arm portion 29b. And have. Of these, the first arm portion 29a protrudes to the side away from the face F of the wearer H (upper side in FIG. 2F), and the second arm portion 29b is anterior to the first arm portion 29a (left side in FIG. 2F). It protrudes toward. Further, the protrusion 29c protrudes from the second arm portion 29b toward the face F of the wearer H (lower side of FIG. 2F). Such an engaging portion 29 may be integrally formed with the front portion 22. That is, the front portion 22 and the engaging portion 29 may be integrally formed. In this case, as shown in FIG. 2F, by inserting the protrusion 29c into the opening 33a, the engaged portion 33 and the engaging portion 29 are engaged with each other, and the shield portion 30A is attached to the holding member 20. Here, as shown in FIG. 2F, in the horizontal cross section, the protrusion amount of the protrusion 29c from the second arm portion 29b gradually decreases as the front surface 29d of the protrusion 29c toward the front (left side in FIG. 2F). As such, it may be inclined. As a result, when the shield portion 30A is attached to the holding member 20, the portion of the shield portion 30A between the opening 33a and the recess 34 can easily get over the protrusion 29c. Therefore, the shield portion 30A can be easily attached to the holding member 20.

Further, in the horizontal cross section, the rear surface 29e of the protrusion may be orthogonal to the front-rear direction (horizontal direction in FIG. 2F). As a result, it is possible to prevent the shield portion 30A attached to the holding member 20 from being unintentionally removed from the holding member 20.

Transparent laminated film with protective film Next, the transparent laminated film 60 with a protective film according to the present embodiment will be described. 3A to 3D show an example of the layer structure of the transparent laminated film 60 with a protective film. As shown in FIGS. 3A to 3D, the transparent laminated film 60 with a protective film includes the transparent laminated film 30 according to the present embodiment, the surface protective film 61 that protects the surface 301 of the transparent laminated film 30, and the transparent laminated film 30. It is provided with a back surface protective film 62 that protects the back surface 302 of the above.

Of these, the front surface protective film 61 and the back surface protective film 62 suppress the scratches on the front surface 301 and the back surface 302 of the transparent laminated film 30, and prevent the front surface 301 and the back surface 302 from being contaminated by foreign matter or the like. Play a role. The front surface protective film 61 and the back surface protective film 62 are detachably attached to the transparent laminated film 30. The front surface protective film 61 and the back surface protective film 62 each include a bonding layer (not shown), and the bonding layer may be attached to the transparent laminated film 30. The adhesive strength of the bonding layer may be, for example, about 0.05 N / 25 mm or more and 5 N / 25 mm or less. Further, when the above-mentioned face shield 10 is used, the front surface protective film 61 and the back surface protective film 62 are each peeled off from the transparent laminated film 30. The material of the front surface protective film 61 and the back surface protective film 62 may be, for example, a film made of a polyester resin or a polyolefin such as polyethylene or polypropylene.

Transparent Laminated Film Next, the transparent laminated film 30 according to the present embodiment will be described. As described above, the transparent laminated film 30 may be used for the face shield 10 that protects the face F of the wearer H. As shown in FIGS. 3A to 3D, the transparent laminated film 30 includes a front surface antireflection layer 40 constituting the front surface 301 and a back surface antireflection layer 50 constituting the back surface 302. Further, as shown in FIGS. 3A and 3B, the transparent laminated film 30 may further include a transparent adhesive layer 31 for adhering the front surface antireflection layer 40 and the back surface antireflection layer 50.

Specifically, as shown in FIGS. 3A and 3B, the transparent laminated film 30 has a front surface antireflection layer 40, a transparent adhesive layer 31, and a back surface antireflection layer 50 from the front surface 301 to the back surface 302. It is prepared in this order. In this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

Further, in the examples shown in FIGS. 3A and 3B, the surface antireflection layer 40 has a surface antireflection functional layer 41 arranged in order from the front surface 301 to the back surface 302, and a surface transparent base material layer 42. ing. Further, the surface antireflection function layer 41 includes a surface refraction layer 43 arranged in order from the front surface 301 to the back surface 302, and a surface hard coat layer 44. Further, the surface refractive index layer 43 includes a surface low refractive index layer 45 arranged in order from the front surface 301 to the back surface 302, and a surface high refractive index layer 46. Here, as shown in FIG. 3B, the front surface high refractive index layer 46 includes a first surface high refractive index layer 47 arranged in order from the front surface 301 toward the back surface 302, and a second surface high refractive index layer 48. It may be included.

Further, in the examples shown in FIGS. 3A and 3B, the back surface antireflection layer 50 has a back surface antireflection function layer 51 arranged in order from the back surface 302 toward the front surface 301, and a back surface transparent base material layer 52. ing. Further, the back surface antireflection function layer 51 includes a back surface refraction layer 53 arranged in order from the back surface 302 toward the front surface 301, and a back surface hard coat layer 54. Further, the back surface refractive index layer 53 includes a back surface low refractive index layer 55 arranged in order from the back surface 302 toward the front surface 301, and a back surface high refractive index layer 56. Here, as shown in FIG. 3B, the back surface high refractive index layer 56 includes a first back surface high refractive index layer 57 arranged in order from the back surface 302 toward the front surface 301, and a second back surface high refractive index layer 58. It may be included.

Further, as shown in FIGS. 3C and 3D, the transparent laminated film 30 may further include a core layer 32 located between the front surface antireflection layer 40 and the back surface antireflection layer 50. In this case, the transparent laminated film 30 includes a first transparent adhesive layer 31a for adhering the front surface antireflection layer 40 and the core layer 32, and a second transparent adhesive layer 31b for adhering the core layer 32 and the back surface antireflection layer 50. May be further provided.

Specifically, as shown in FIGS. 3C and 3D, the transparent laminated film 30 includes a front surface antireflection layer 40, a first transparent adhesive layer 31a, and a core layer 32 from the front surface 301 to the back surface 302. The second transparent adhesive layer 31b and the back surface antireflection layer 50 are provided in this order. Also in this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

Further, also in the examples shown in FIGS. 3C and 3D, the surface antireflection layer 40 has a surface antireflection functional layer 41 arranged in order from the front surface 301 to the back surface 302, and a surface transparent base material layer 42. ing. Further, the surface antireflection function layer 41 includes a surface refraction layer 43 arranged in order from the front surface 301 to the back surface 302, and a surface hard coat layer 44. Further, the surface refractive index layer 43 includes a surface low refractive index layer 45 arranged in order from the front surface 301 to the back surface 302, and a surface high refractive index layer 46. Here, as shown in FIG. 3D, the front surface high refractive index layer 46 includes a first surface high refractive index layer 47 arranged in order from the front surface 301 toward the back surface 302, and a second surface high refractive index layer 48. It may be included.

Further, also in the examples shown in FIGS. 3C and 3D, the back surface antireflection layer 50 has a back surface antireflection function layer 51 arranged in order from the back surface 302 toward the front surface 301, and a back surface transparent base material layer 52. ing. Further, the back surface antireflection function layer 51 includes a back surface refraction layer 53 arranged in order from the back surface 302 toward the front surface 301, and a back surface hard coat layer 54. Further, the back surface refractive index layer 53 includes a back surface low refractive index layer 55 arranged in order from the back surface 302 toward the front surface 301, and a back surface high refractive index layer 56. Here, as shown in FIG. 3D, the back surface high refractive index layer 56 includes a first back surface high refractive index layer 57 arranged in order from the back surface 302 toward the front surface 301, and a second back surface high refractive index layer 58. It may be included.

As described above, the surface antireflection layer 40 may have a basic configuration having a surface high refractive index layer 46 and a surface low refractive index layer 45 on the surface transparent base material layer 42. Further, as described above, the back surface antireflection layer 50 may have a basic configuration having a back surface high refractive index layer 56 and a back surface low refractive index layer 55 on the back surface transparent base material layer 52. The front surface high refractive index layer 46 (back surface high refractive index layer 56) and the front surface low refractive index layer 45 (back surface low refractive index layer 55) play a role of imparting an antireflection function by an optical interference function.

The front surface antireflection layer 40 (back surface antireflection layer 50) may be further provided with a medium refractive index layer to provide an antireflection function due to an optical interference function of three or more layers, but if the structure is too multi-layered, it is cost-effective. It is not preferable from the viewpoint of effect. Therefore, the front surface antireflection layer 40 (back surface antireflection layer 50) according to the present embodiment includes the front surface high refractive index layer 46 (back surface high refractive index layer 56) and the front surface low refractive index layer 45 (back surface low refractive index layer 55). It is preferable that the two layers of the above are configured to provide an antireflection function by an optical interference function. The front surface antireflection layer 40 (back surface antireflection layer 50) has a medium refractive index of the front surface hard coat layer 44 (back surface hard coat layer 54) to form a medium refractive index layer, a high refractive index layer, and a low refractive index layer. The three layers may be provided with an antireflection function by an optical interference function.

Hereinafter, each layer of the transparent laminated film 30 will be described.

<Front surface anti-reflection layer and back surface anti-reflection layer>
The surface antireflection layer 40 is a layer for suppressing reflection of light incident on the surface 301 side of the transparent laminated film 30 mainly. Since the transparent laminated film 30 includes the surface antireflection layer 40, it is possible to suppress the reflection of light on the surface 301 of the transparent laminated film 30. Thereby, for example, when the wearer H wearing the face shield 10 is visually recognized, the visibility of the face F of the wearer H can be improved. Therefore, the visibility of the mouth of the wearer H can be improved, and smooth communication between the wearer H and others can be achieved. Further, the back surface antireflection layer 50 plays a role of suppressing not only the reflection of the light incident from the back surface 302 side but also the reflection of the light incident from the front surface 301 side.

On the other hand, the back surface antireflection layer 50 is a layer for suppressing the reflection of light incident on the back surface 302 side of the transparent laminated film 30. Since the transparent laminated film 30 includes the back surface antireflection layer 50, it is possible to suppress the reflection of light on the back surface 302 of the transparent laminated film 30. As a result, for example, the wearer H wearing the face shield 10 can be prevented from feeling uncomfortable or tired due to the light reflected on the back surface 302 of the transparent laminated film 30.

As described above, the surface antireflection layer 40 has a surface antireflection functional layer 41 and a surface transparent base material layer 42. Further, as described above, the back surface antireflection layer 50 has a back surface antireflection function layer 51 and a back surface transparent base material layer 52. Here, first, the front surface transparent base material layer 42 and the back surface transparent base material layer 52 will be described.

[Surface transparent base material layer and back surface transparent base material layer]
The front surface transparent base material layer 42 and the back surface transparent base material layer 52 support, for example, the front surface antireflection function layer 41 and the back surface antireflection function layer 51, and the overall strength of the front surface antireflection layer 40 and the back surface antireflection layer 50. It is a layer to enhance. The material of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 is not particularly limited as long as it is a transparent material used as a base material of a general film, but is preferable from the viewpoint of material cost, productivity and the like. A plastic film, a plastic sheet, etc. can be appropriately selected according to the intended use.

Examples of the material of the plastic film or the plastic sheet include materials made of various synthetic resins. Examples of the synthetic resin include cellulose resins such as triacetyl cellulose resin (TAC), diacetyl cellulose, acetate butyrate cellulose, and cellophane; polyethylene terephthalate resin (PET), polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer resin, and polyester. Polyester resin such as based thermoplastic elastomer; low density polyethylene resin (including linear low density polyethylene resin), medium density polyethylene resin, high density polyethylene resin, ethylene α-olefin copolymer, polypropylene resin, polymethylpentene resin, polybutene Polyolefin resins such as resins, ethylene-propylene copolymers, propylene-butene copolymers, olefin-based thermoplastic elastomers, or mixtures thereof; poly (meth) methyl acrylate resin, poly (meth) ethyl acrylate resin, poly Acrylic resin such as (meth) butyl acrylate resin; polyamide resin typified by nylon 6 or nylon 66; polystyrene resin; polycarbonate resin; polyallylate resin; or polyimide resin and the like are preferably mentioned. Further, the material of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 may be a cycloolefin polymer (COP) -based resin or a cycloolefin copolymer (COC) -based resin.

As the front surface transparent base material layer 42 and the back surface transparent base material layer 52, one of the above-mentioned plastic films and plastic sheets can be used alone, or two or more kinds can be selected and used as a mixture. From the viewpoint of transparency and the like, cellulose resin and polyester resin are more preferable as the materials for the front surface transparent base material layer 42 and the back surface transparent base material layer 52. Further, from the viewpoint of flexibility, toughness, transparency and the like, it is preferable that the front surface transparent base material layer 42 and the back surface transparent base material layer 52 contain triacetyl cellulose and polyethylene terephthalate. As the polyethylene terephthalate forming the front surface transparent base material layer 42 and the back surface transparent base material layer 52, for example, polyethylene terephthalate having a smaller haze (JISK7136: 2000) than general polyethylene terephthalate, so-called optical PET, may be used. preferable.

The thickness of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 is not particularly limited and may be appropriately selected depending on the intended use. The thickness of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 may be about 5 μm or more and 130 μm or less, respectively, and is preferably 10 μm or more and 100 μm or less in consideration of durability and handleability. The thickness of each layer is measured at 20 points from the cross-sectional image taken with, for example, a scanning electron microscope (SEM), a transmission electron microscope (TEM), or a scanning transmission electron microscope (STEM). However, it can be calculated from the average value of the values at 20 points. When the film thickness to be measured is on the order of μm, it is preferable to use SEM, and when the film thickness is on the order of nm, it is preferable to use TEM or STEM. In the case of SEM, the acceleration voltage is preferably 1 kV or more and 10 kV or less, and the magnification is preferably 1000 times or more and 7,000 times or less. In the case of TEM or STEM, the acceleration voltage is 10 kV or more and 30 kV or less, and the magnification is 50,000 times or more and 300,000 times or less. Is preferable. For each layer described below, the film thickness of each layer can be measured by the same method as the film thickness of the front surface transparent base material layer 42 and the back surface transparent base material layer 52.

[Front surface antireflection function layer and back surface antireflection function layer]
Next, the front surface antireflection function layer 41 and the back surface antireflection function layer 51 will be described. The front surface antireflection function layer 41 and the back surface antireflection function layer 51 play a role of imparting a function of suppressing light reflection to the front surface antireflection layer 40 and the back surface antireflection layer 50, respectively.

Further, the front surface antireflection functional layer 41 may be a coating layer coated on the front surface transparent base material layer 42, and the back surface antireflection function layer 51 may be a coating layer coated on the back surface transparent base material layer 52. May be. As described above, since the front surface antireflection function layer 41 and the back surface antireflection function layer 51 are coating layers, the thicknesses of the front surface reflection prevention function layer 41 and the back surface antireflection function layer 51 can be easily controlled, and the transparent laminated film 30 can be easily controlled. Desired functions such as light reflectance and total light transmittance can be easily controlled.

It is preferable that the front surface antireflection function layer 41 and the back surface antireflection function layer 51 are each made of a cured product containing an acrylic monomer. As a result, the front surface antireflection function layer 41 and the back surface antireflection function layer 51 with high uniformity can be formed even by processing in a short time.

Here, as described above, the surface antireflection functional layer 41 includes the surface refraction layer 43 and the surface hard coat layer 44. Further, as described above, the back surface antireflection function layer 51 includes the back surface refraction layer 53 and the back surface hard coat layer 54. The surface hard coat layer 44 may be a coating layer coated on the surface transparent base material layer 42, and the surface refraction layer 43 may be a coating layer coated on the surface hard coat layer 44. Further, the back surface hard coat layer 54 may be a coating layer coated on the back surface transparent base material layer 52, and the back surface refractive layer 53 may be a coating layer coated on the back surface hard coat layer 54. good. As described above, since the front surface refractive layer 43, the front surface hard coat layer 44, the back surface refractive layer 53, and the back surface hard coat layer 54 are coating layers, the thickness of each layer can be easily controlled, and the light reflection of the transparent laminated film 30 can be easily controlled. Desired functions such as rate, total light transmittance, and in some cases, tint can be easily controlled.

Next, the front surface hard coat layer 44 and the back surface hard coat layer 54 will be described.

{Front surface hard coat layer and back surface hard coat layer}
The front surface hard coat layer 44 and the back surface hard coat layer 54 play a role of improving the scratch resistance of the front surface antireflection layer 40 and the back surface antireflection layer 50. Here, the hard coat means a property showing a hardness of "H" or higher in the pencil hardness test specified in JIS K5600-5-4: 1999. The front surface hard coat layer 44 and the back surface hard coat layer 54 can be formed from, for example, a hard coat layer coating liquid containing a curable resin composition. Examples of the curable resin composition include a thermosetting resin composition and an ionizing radiation curable resin composition, and an ionizing radiation curable resin composition is preferable from the viewpoint of scratch resistance.

The thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that is cured by heating. Examples of the thermosetting resin include acrylic resin, urethane resin, phenol resin, urea melamine resin, epoxy resin, unsaturated polyester resin, silicone resin and the like. To the thermosetting resin composition, a curing agent is added to these curable resins as needed.

The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter, also referred to as "ionizing radiation curable compound"). Examples of the ionizing radiation curable functional group include an ethylenically unsaturated bond group such as a (meth) acryloyl group, a vinyl group and an allyl group, an epoxy group and an oxetanyl group. As the ionizing radiation curable compound, a compound having an ethylenically unsaturated bond group is preferable, a compound having two or more ethylenically unsaturated bond groups is more preferable, and a compound having two or more ethylenically unsaturated bond groups is particularly preferable. Polyfunctional (meth) acrylate compounds are more preferred. As the polyfunctional (meth) acrylate compound, either a monomer or an oligomer can be used. The ionized radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking a molecule among electromagnetic waves or charged particle beams, and usually, an ultraviolet ray (UV) or an electron beam (EB) is used. However, in addition, electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion-beams can also be used.

Among the polyfunctional (meth) acrylate compounds, the bifunctional (meth) acrylate monomers include ethylene glycol di (meth) acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexane. Examples thereof include diol diacrylate. Examples of the trifunctional or higher functional (meth) acrylate-based monomer include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and di. Examples thereof include pentaerythritol tetra (meth) acrylate and isocyanuric acid-modified tri (meth) acrylate. The (meth) acrylate-based monomer may be a monomer in which a part of the molecular skeleton is modified, and is modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol and the like. It may be a monomer.

Examples of the polyfunctional (meth) acrylate-based oligomer include acrylate-based polymers such as urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate. Urethane (meth) acrylates are obtained, for example, by reacting polyhydric alcohols and organic diisocyanates with hydroxy (meth) acrylates. Further, the preferable epoxy (meth) acrylate is a (meth) acrylate obtained by reacting a (meth) acrylic acid with a trifunctional or higher functional aromatic epoxy resin, an alicyclic epoxy resin, an aliphatic epoxy resin and the like, and a bifunctional one. (Meta) acrylate obtained by reacting the above aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with polybasic acid and (meth) acrylic acid, and bifunctional or higher functional aromatic epoxy resin, It is a (meth) acrylate obtained by reacting an alicyclic epoxy resin, an aliphatic epoxy resin or the like with phenols and (meth) acrylic acid. The ionizing radiation curable compound may be used alone or in combination of two or more.

When the ionizing radiation curable compound is an ultraviolet curable compound, the ionizing radiation curable composition preferably contains an additive such as a photopolymerization initiator or a photopolymerization accelerator. Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler ketone, benzoin, benzylmethyl ketal, benzoyl benzoate, α-acyloxime ester, thioxanthones and the like. These photopolymerization initiators preferably have a melting point of 100 ° C. or higher. By setting the melting point of the photopolymerization initiator to 100 ° C. or higher, it is possible to prevent the remaining photopolymerization initiator from sublimating during the formation of the transparent conductive film or the heat of the crystallization step, thereby impairing the low resistance of the transparent conductive film. can. The same applies to the case where the photopolymerization initiator is used in the high refractive index layer and the low refractive index layer described later. Further, the photopolymerization accelerator is a material capable of reducing the polymerization inhibition due to air at the time of curing and accelerating the curing rate, and is, for example, from p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester and the like. One or more selected species can be mentioned.

The thickness of the front surface hard coat layer 44 and the back surface hard coat layer 54 is preferably in the range of 0.1 μm or more and 100 μm or less, and more preferably in the range of 0.8 μm or more and 20 μm or less. If the thicknesses of the front surface hard coat layer 44 and the back surface hard coat layer 54 are within the above ranges, sufficient hard coat performance can be obtained, cracks and the like are not generated due to an external impact, and cracks are less likely to occur.

The refractive index of the front surface hard coat layer 44 and the back surface hard coat layer 54 is preferably smaller than the refractive index of the front surface high refractive index layer 46 and the back surface high refractive index layer 56, and is 1.45 or more and 1.70 or less. It is more preferably 1.45 or more and 1.60 or less. If the refractive indexes of the front surface hard coat layer 44 and the back surface hard coat layer 54 are in such a range, the front surface hard coat layer 44 and the back surface hard coat layer 54 each have a role as a medium refractive index layer. As a result, the interference action of the three layers of the front surface hard coat layer 44, the front surface high refractive index layer 46 and the front surface low refractive index layer 45, and the back surface hard coat layer 54, the back surface high refractive index layer 56 and the back surface low refractive index layer 55 Interference action by the three layers of is possible. Therefore, the reflection of light can be effectively suppressed. Further, from the viewpoint of suppressing interference fringes, the difference between the refractive index of the front surface hard coat layer 44 and the back surface hard coat layer 54 and the refractive index of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 should be reduced. Is preferable.

As means for imparting the role of the medium refractive index layer to the front surface hard coat layer 44 and the back surface hard coat layer 54, a means for blending a resin having a high refractive index in the hard coat layer coating liquid and a means for blending particles having a high refractive index are blended. Means to do. When particles having a high refractive index are blended, whitening or coating defects may occur due to aggregation of the particles. Therefore, the former means (blended with a resin having a high refractive index) is preferable. Examples of the resin having a high refractive index include the above-mentioned thermosetting resin or a resin in which a group containing sulfur, phosphorus and bromine, an aromatic ring and the like are introduced into the ionizing radiation curable compound. As the particles having a high refractive index, particles similar to the high refractive index particles used for the front surface high refractive index layer 46 and the back surface high refractive index layer 56, which will be described later, can be used.

The refractive index of each layer such as the front surface hard coat layer 44 and the back surface hard coat layer 54 is determined by fitting, for example, a reflection spectrum measured by a reflected photometer and a reflection spectrum calculated from an optical model of a multilayer thin film using a Fresnel coefficient. Can be calculated.

For the front surface hard coat layer 44 and the back surface hard coat layer 54, the coating liquid for forming the hard coat layer is adjusted by the above-mentioned curable resin composition, additives such as an ultraviolet absorber and a leveling agent to be blended as necessary, and a diluting solvent. The coating liquid can be formed by applying the coating liquid onto a transparent substrate by a conventionally known coating method, drying the coating liquid, and irradiating the transparent substrate with ionizing radiation as necessary to cure the coating liquid.

{Front refraction layer and back refraction layer}
Next, the front refraction layer 43 and the back refraction layer 53 will be described. The front surface refraction layer 43 and the back surface refraction layer 53 play a role of reducing the light reflectance of the front surface antireflection layer 40 and the back surface antireflection layer 50. As described above, the surface refractive index layer 43 includes the surface low refractive index layer 45 and the surface high refractive index layer 46. Further, as described above, the back surface refractive index layer 53 includes the back surface low refractive index layer 55 and the back surface high refractive index layer 56. Here, first, the front surface low refractive index layer 45 and the back surface low refractive index layer 55 will be described.

(Front surface low refractive index layer and back surface low refractive index layer)
The front surface low refractive index layer 45 and the back surface low refractive index layer 55 are layers provided on the front surface high refractive index layer 46 and the back surface high refractive index layer 56, and together with the front surface high refractive index layer 46 and the back surface high refractive index layer 56. By using the difference in the refractive index of the above, it plays a role of lowering the light reflectance of the front surface antireflection layer 40 and the back surface antireflection layer 50 by the interference action. The front surface low refractive index layer 45 and the back surface low refractive index layer 55 have a refractive index of 1.26 or more and 1.40 or less in order to make the front surface antireflection layer 40 and the back surface antireflection layer 50 have ultra-low reflectance. Is more preferable, 1.28 or more and 1.38 or less are more preferable, and 1.30 or more and 1.32 or less are further preferable. The lower the refractive index of the front surface low refractive index layer 45 and the back surface low refractive index layer 55, the more the surface reflection prevention without increasing the refractive index of the front surface high refractive index layer 46 and the back surface high refractive index layer 56. The refractive index of the layer 40 and the back surface antireflection layer 50 can be lowered. On the other hand, if the refractive index of the front surface low refractive index layer 45 and the back surface low refractive index layer 55 is too low, the strength of the front surface low refractive index layer 45 and the back surface low refractive index layer 55 tends to decrease. Therefore, by setting the refractive indexes of the front surface low refractive index layer 45 and the back surface low refractive index layer 55 in the above ranges, the surface high refractive index while maintaining the strength of the front surface low refractive index layer 45 and the back surface low refractive index layer 55, respectively. It is preferable in that the amount of high-refractive index particles added to the rate layer 46 and the back surface high-refractive index layer 56, which will be described later, can be suppressed, which leads to suppression of color and whitening. The thickness of the front surface low refractive index layer 45 and the back surface low refractive index layer 55 is preferably 80 nm or more and 120 nm, more preferably 85 nm or more and 110 nm, and further preferably 90 nm or more and 105 nm. Further, the front surface low refractive index layer 45 and the back surface low refractive index layer 55 may be formed from a plurality of layers each satisfying the above-mentioned refractive index range, but from the viewpoint of cost effectiveness, two or less layers are preferable. Layers are more preferred.

The method for forming the front surface low refractive index layer 45 and the back surface low refractive index layer 55 can be roughly divided into a wet method and a dry method. As the wet method, a method of forming by a sol-gel method using a metal alkoxide or the like, a method of applying a resin having a low refractive index such as a fluororesin to form the resin, and a low refractive index particles contained in the resin composition. A method of forming by applying a coating liquid for forming a refractive index layer can be mentioned. Examples of the dry method include a method of selecting particles having a desired refractive index from low refractive index particles described later and forming them by a physical vapor deposition method or a chemical vapor deposition method. The wet method is excellent in terms of production efficiency, and in the present embodiment, among the wet methods, it is preferable to form the resin composition with a coating liquid for forming a low refractive index layer containing low refractive index particles. ..

The low refractive index particles are preferably used for the purpose of lowering the refractive index, that is, improving the antireflection property, and are used without limitation regardless of whether they are inorganic or organic such as silica and magnesium fluoride. However, from the viewpoint of further improving the antireflection property and ensuring good surface hardness, particles having a structure having voids themselves are preferably used.

Particles having a structure having voids themselves have fine voids inside, and are filled with a gas such as air having a refractive index of 1.0, so that the particles themselves have a low refractive index. It has become. Examples of the particles having such voids include inorganic or organic porous particles, hollow particles, and the like, and for example, porous polymer particles using porous silica, hollow silica particles, acrylic resin, or the like. And hollow polymer particles. As the inorganic particles, silica particles having voids prepared by using the technique disclosed in Japanese Patent Application Laid-Open No. 2001-233611 are preferable examples. Further, as the organic particles, hollow polymer particles prepared by using the technique disclosed in JP-A-2002-80503 are preferable examples. Silica having voids or porous silica as described above has a refractive index in the range of 1.18 or more and 1.44 or less, and is more refracted than general silica particles having a refractive index of about 1.45. Since the rate is low, it is preferable from the viewpoint of reducing the refractive index of the front surface low refractive index layer 45 and the back surface low refractive index layer 55.

The hollow silica particles are particles having a function of lowering the refractive index while maintaining the coating film strength of the front surface low refractive index layer 45 and the back surface low refractive index layer 55. The hollow silica particles used in the present embodiment are silica particles having a structure having a cavity inside. The hollow silica particles are silica particles whose refractive index decreases in inverse proportion to the occupancy rate of the internal cavity as compared with the original refractive index of the silica particles (refractive index n = about 1.45). Therefore, the refractive index of the hollow silica particles as a whole is 1.18 or more and 1.44 or less.

The hollow silica particles are not particularly limited, and are, for example, particles having an outer shell and having a porous or hollow inside thereof, and are JP-A-6-330606 and JP-A-7-0131337. , Silica particles prepared by using the techniques disclosed in JP-A No. 7-133105 and JP-A-2001-233611.

The average particle diameter of the primary particles of the low refractive index particles is preferably 5 nm or more and 200 nm or less, more preferably 5 nm or more and 100 nm or less, and further preferably 10 nm or more and 80 nm or less. When the average particle size of the primary particles is within the above range, the transparency of the front surface low refractive index layer 45 and the back surface low refractive index layer 55 is not impaired, and a good dispersed state of particles can be obtained. In particular, hollow particles are used as the low refractive index particles, and the particles having an average particle diameter of 70 nm or more and 80 nm or less have an increased refractive index while maintaining the thickness of the outer shell that does not cause insufficient strength. It is preferable in that it can be lowered and has an excellent balance with the ideal thickness (about 100 nm) of the front surface low refractive index layer 45 and the back surface low refractive index layer 55 for lowering the reflectance.

The low refractive index particles used in this embodiment are preferably surface-treated particles. As the surface treatment of the low refractive index particles, a surface treatment using a silane coupling agent is more preferable, and among these, a surface treatment using a silane coupling agent having a (meth) acryloyl group is preferable. By applying a surface treatment to the low refractive index particles, the affinity with the binder resin described later is improved, the dispersion of the particles becomes uniform, and the particles are less likely to aggregate with each other. The decrease in the transparency of the refractive index layer 45 and the back surface low refractive index layer 55, the coatability of the layer-forming composition, and the decrease in the coating strength of the composition are suppressed.

Further, when the silane coupling agent has a (meth) acryloyl group, the silane coupling agent has an ionizing radiation curable property and easily reacts with a binder resin described later. In the medium, the low refractive index particles are well fixed to the binder resin. That is, the low refractive index particles have a function as a cross-linking agent in the binder resin. As a result, the tightening effect of the entire coating film can be obtained, and excellent surface hardness can be imparted to the front surface low refractive index layer 45 and the back surface low refractive index layer 55 while retaining the original flexibility of the binder resin. Will be. Therefore, since the front surface low refractive index layer 45 and the back surface low refractive index layer 55 are deformed by utilizing their own flexibility, they have an absorption force against an external impact and a restoring force, so that the occurrence of scratches is suppressed. It is a layer having high surface hardness with excellent scratch resistance.

Preferred silane coupling agents for surface treatment of low refractive index particles include 3- (meth) acryloxypropyltrimethoxysilane, 3- (meth) acryloxypropyltriethoxysilane, and 3- (meth) acryloxipropyl. Examples thereof include methyldimethoxysilane, 3- (meth) acryloxypropylmethyldiethoxysilane, 2- (meth) acryloxypropyltrimethoxysilane, 2- (meth) acryloxipropyltriethoxysilane, and the like.

The content of the low refractive index particles in the front surface low refractive index layer 45 and the back surface low refractive index layer 55 is 10 parts by mass or more and 250 parts by mass with respect to 100 parts by mass of the resin of the front surface low refractive index layer 45 and the back surface low refractive index layer 55, respectively. It is preferably 5 parts by mass or less, more preferably 50 parts by mass or more and 200 parts by mass or less, and further preferably 100 parts by mass or more and 180 parts by mass or less. When the content of the low refractive index particles is within the above range, good antireflection properties and surface hardness can be obtained. Further, the ratio of the hollow particles and / or the porous particles to the total low refractive index particles contained in the front surface low refractive index layer 45 and the back surface low refractive index layer 55 is preferably 70% by mass or more, and is preferably 80% by mass. % Or more, more preferably 80% by mass or more and 95% by mass or less.

Examples of the resin composition contained in the layer-forming coating liquid include a curable resin composition. As the curable resin composition, the same materials as those exemplified in the description of the front surface hard coat layer 44 and the back surface hard coat layer 54 can be used, and the ionizing radiation curable resin composition is suitable. Further, as the resin composition, a fluoropolymer or a fluoromonomer which itself exhibits a low refractive index is also preferably used. The fluoropolymer is a polymer of a polymerizable compound containing at least a fluorine atom in the molecule, and is suitable in that it can impart antifouling property and slipperiness. The fluoropolymer is preferably a polymer having a reactive group in the molecule and functioning as a curable resin composition, and has an ionizing radiation curable reactive group and functions as an ionizing radiation curable resin composition. It is more preferable that the polymer is a polymer.

The fluoropolymer is preferably a polymer containing silicon together with fluorine in order not only to repel stains on the surface of the low refractive index layer but also to impart wiping property of the repelled stains, and for example, a copolymer. A silicone-containing vinylidene fluoride copolymer containing a silicone component is preferable. In this case, the silicone components include (poly) dimethylsiloxane, (poly) diethylsiloxane, (poly) diphenylsiloxane, (poly) methylphenylsiloxane, alkyl-modified (poly) dimethylsiloxane, and azo group-containing (poly) dimethylsiloxane. , Dimethyl silicone, phenylmethyl silicone, alkyl / aralkyl-modified silicone, fluorosilicone, polyether-modified silicone, fatty acid ester-modified silicone, methyl hydrogen silicone, silanol group-containing silicone, alkoxy group-containing silicone, phenol group-containing silicone, methacryl-modified silicone, Examples thereof include acrylic-modified silicone, amino-modified silicone, carboxylic acid-modified silicone, carbinol-modified silicone, epoxy-modified silicone, mercapto-modified silicone, fluorine-modified silicone, and polyether-modified silicone. Among them, as the silicone component, a component having a dimethylsiloxane structure is preferable.

The front surface low refractive index layer 45 and the back surface low refractive index layer 55 are coated for layer formation with, for example, low refractive index particles, a resin composition, additives such as an ultraviolet absorber and a leveling agent to be blended as necessary, and a diluting solvent. It can be formed by adjusting the liquid, applying the coating liquid on the front surface high refractive index layer 46 or the back surface high refractive index layer 56 by a conventionally known coating method, drying, and irradiating ionizing radiation as necessary to cure. ..

(Front surface high refractive index layer and back surface high refractive index layer)
The front surface high refractive index layer 46 and the back surface high refractive index layer 56 use the difference in refractive index between the front surface low refractive index layer 45 and the back surface low refractive index layer 55 to prevent the front surface reflection layer 40 and the back surface reflection by an interference action. It serves to reduce the light reflectance of the layer 50. The front surface high refractive index layer 46 and the back surface high refractive index layer 56 can be formed from, for example, a layer-forming coating liquid containing a curable resin composition and high refractive index particles, respectively.

It is preferable that the front surface high refractive index layer 46 and the back surface high refractive index layer 56 have a high refractive index from the viewpoint of making the front surface antireflection layer 40 and the back surface antireflection layer 50 ultra-low refractive index, but the refractive index is high. This requires a large amount of high-refractive index particles, which causes agglomeration of the high-refractive index particles and causes whitening. Therefore, the refractive index is preferably 1.55 or more and 1.85 or less, and more preferably 1.56 or more and 1.70 or less. The thickness of the front surface high refractive index layer 46 and the back surface high refractive index layer 56 is preferably 200 nm or less, and more preferably 50 nm or more and 180 nm or less. When the front surface high refractive index layer 46 and the back surface high refractive index layer 56 each have a two-layer structure described later, it is preferable that the total thickness of the two layers satisfies the above value. Further, the front surface high refractive index layer 46 and the back surface high refractive index layer 56 may be formed from a plurality of layers satisfying the above-mentioned refractive index range, but from the viewpoint of cost effectiveness, two or less layers are preferable, and a single layer is preferable. Is more preferable.

Examples of high refractive index particles include antimony pentoxide (1.79), zinc oxide (1.90), titanium oxide (2.3 or more and 2.7 or less), cerium oxide (1.95), and tin-doped indium oxide (1). .95 or more and 2.00 or less), antimony-doped tin oxide (1.75 or more and 1.85 or less), yttrium oxide (1.87), zirconium oxide (2.10) and the like. The numbers in parentheses indicate the refractive index of the material of each particle. Among these high refractive index particles, particles having a refractive index of more than 2.0 are preferable from the viewpoint of achieving the above-mentioned suitable refractive index with a small amount of addition. Further, high refractive index particles having conductivity such as antimony pentoxide, tin-doped indium oxide (ITO), and antimonated tin oxide (ATO) have free electrons whose plasma frequency is in the near infrared region, and the free electrons. Due to the plasma oscillation of, some light in the visible light region is also absorbed or reflected, and it may be difficult to suppress the tint. Therefore, the high-refractive index particles are preferably non-conductive particles. From the above, among the high-refractive index particles exemplified above, titanium oxide and zirconium oxide are suitable, and zirconium oxide is most suitable from the viewpoint of high durability stability such as light resistance. If it is desired to impart antistatic properties to the front surface antireflection layer 40 and the back surface antireflection layer 50, the front surface high refractive index layer 46 and the back surface high refractive index layer 56 are formed into a two-layer structure as described later, and one of the layers is formed. It is preferable to contain conductive high refractive index particles.

The average particle size of the primary particles of the high refractive index particles is preferably 5 nm or more and 200 nm or less, more preferably 5 nm or more and 100 nm or less, and further preferably 10 nm or more and 80 nm or less. The average particle size of the primary particles of the high refractive index particles and the low refractive index particles described later can be calculated by the following operations (1) to (3).
(1) The surface image of SEM, TEM, or STEM is imaged with respect to the particles themselves or the material obtained by applying and drying the dispersion liquid of the particles on a transparent substrate.
(2) Arbitrary 10 particles are extracted from the surface image, the major axis and the minor axis of each particle are measured, and the particle size of each particle is calculated from the average of the major axis and the minor axis. The major axis is the longest diameter on the screen, and the minor axis is the distance between two points where the orthogonal line segments intersect with the particles by drawing a line segment orthogonal to the midpoint of the line segment constituting the major axis. ..
(3) The same operation is performed 5 times in the imaging of another screen of the same sample, and the value obtained from the average number of particle sizes of 50 particles in total is taken as the average particle size.
When calculating the average particle size of particles, it is preferable to use SEM when the average particle size to be calculated is on the order of μm, and it is preferable to use TEM or STEM when the average particle size to be calculated is on the order of nm. .. In the case of SEM, the acceleration voltage is preferably 1 kV or more and 10 kV or less, and the magnification is preferably 1000 times or more and 7,000 times or less. It is preferable to do so.

The content of the high refractive index particles is 30 parts by mass or more and 400 parts by mass or less with respect to 100 parts by mass of the curable resin composition from the viewpoint of the balance of high refractive index, suppression of color tint and suppression of whitening. It is more preferably 50 parts by mass or more and 200 parts by mass or less, and further preferably 80 parts by mass or more and 150 parts by mass or less.

The front surface high refractive index layer 46 and the back surface high refractive index layer 56 are preferably dispersed and stabilized in order to suppress excessive aggregation of the high refractive index particles. Examples of the means for stabilizing the dispersion include means for adding another high-refractive index particle having a surface charge amount smaller than that of the high-refractive index particle as a base. According to the means, the high-refractive index particles as a base can be appropriately gathered around the other high-refractive index particles, and the high-refractive index particles as a base can be prevented from being excessively aggregated. Further, as another means for stabilizing the dispersion, there are means for using surface-treated particles as high refractive index particles and means for adding a dispersant to the coating liquid for layer formation.

As the curable resin composition forming the front surface high refractive index layer 46 and the back surface high refractive index layer 56, the same materials as those exemplified in the description of the front surface hard coat layer 44 and the back surface hard coat layer 54 can be used. , An ionizing radiation curable resin composition is suitable. Further, in order to obtain the above-mentioned refractive index without excessively adding the high refractive index particles, it is preferable to use a curable resin composition having a high refractive index. The refractive index of the curable resin composition is preferably about 1.54 or more and 1.70 or less.

Here, as described above, the surface high refractive index layer 46 may include the first surface high refractive index layer 47 and the second surface high refractive index layer 48. In this case, the refractive index of the first surface high refractive index layer 47 is preferably higher than that of the second surface high refractive index layer 48. As a result, the refractive index difference between the surface high refractive index layer 46 and the surface low refractive index layer 45 can be increased, the refractive index of the surface antireflection layer 40 can be lowered, and the surface high refractive index layer 46 and the surface hard coat can be reduced. The difference in refractive index from the layer 44 can be reduced, and the occurrence of interference fringes can be suppressed.

Further, as described above, the back surface high refractive index layer 56 may include the first back surface high refractive index layer 57 and the second back surface high refractive index layer 58. In this case, as in the case of the front surface high refractive index layer 46, the refractive index of the first back surface high refractive index layer 57 is preferably higher than the refractive index of the second back surface high refractive index layer 58. As a result, the refractive index difference between the back surface high refractive index layer 56 and the back surface low refractive index layer 55 can be increased, the refractive index of the back surface antireflection layer 50 can be lowered, and the back surface high refractive index layer 56 and the back surface hard coat can be reduced. The difference in refractive index from the layer 54 can be reduced, and the occurrence of interference fringes can be suppressed.

When the front surface high refractive index layer 46 and the back surface high refractive index layer 56 are each composed of two layers, the refractive indexes of the first front surface high refractive index layer 47 and the first back surface high refractive index layer 57 are 1.60, respectively. The refractive index of the second front surface high refractive index layer 48 and the second back surface high refractive index layer 58 is preferably 1.55 or more and 1.70 or less, respectively. Further, in the above two-layer structure, one layer contains conductive high-refractive index particles, the other layer contains non-conductive high-refractive index particles, and [contains conductive high-refractive index particles. It is preferable that the thickness of the layer to be formed <the thickness of the layer containing the non-conductive high-refractive index particles]. With this configuration, it is possible to impart antistatic properties while suppressing the amount of conductive high-refractive index particles that may cause color. Further, the conductive high refractive index particles are preferable in that they can be networked in the layer to impart antistatic properties with a small amount of addition, and thus can suppress color tint and whitening.

The front surface high refractive index layer 46 and the back surface high refractive index layer 56 are coated for layer formation by using high refractive index particles, a curable resin composition, additives such as an ultraviolet absorber and a leveling agent to be blended as necessary, and a diluting solvent. It can be formed by adjusting the liquid, applying the coating liquid on the front surface hard coat layer 44 or the back surface hard coat layer 54 by a conventionally known coating method, drying, and irradiating ionizing radiation as necessary to cure.

[Transparent adhesive layer and first transparent adhesive layer and second transparent adhesive layer]
The transparent adhesive layer such as the transparent adhesive layer 31, the first transparent adhesive layer 31a, and the second transparent adhesive layer 31b is a layer for adhering the front surface antireflection layer 40, the back surface antireflection layer 50, the core layer 32, and the like to each other. Here, the "transparent adhesive layer" in the present specification is a concept including a transparent adhesive layer. The transparent adhesive layer can be formed by using various materials generally used as an adhesive. Examples thereof include acrylic adhesives, urethane adhesives, olefin adhesives, rubber adhesives, silicone adhesives, and polyester adhesives. An acrylic pressure-sensitive adhesive that has high transparency and can increase the adhesive strength is preferable.

Each of the above adhesives can contain various functionalizing agents, stabilizers and the like as long as the transparency is not impaired. Further, it is also possible to add an adhesive to enhance the adhesive strength. Further, a cross-linking structure can be formed by using a cross-linking agent such as isocyanate, epoxy, or a double bond-containing compound according to each resin.

The transparent adhesive layer can also be formed by using a type of adhesive (OCA, Optical Clear Adhesive) in which both sides are laminated with a release film. Commercially available products can also be used, for example, optical transparent adhesive sheet LUCIAS series (manufactured by Nitto Denko Co., Ltd.), highly transparent double-sided tape 5400A series (manufactured by Sekisui Chemical Industry Co., Ltd.), optical adhesive sheet Optia series (Lintec Corporation). , SANCUARY series (manufactured by Sanei Kaken Co., Ltd.), optical transparent adhesive OAD series (manufactured by Toyo Packaging Materials Co., Ltd.), optical coreless double-sided tape RA series (manufactured by Sumiron Co., Ltd.), Panaclean series PD-S1 (Panac) (Made by Co., Ltd.), etc. The adhesive strength of these adhesives is generally 10 N / 25 mm or more.

The thickness of the transparent adhesive layer is not particularly limited, but is preferably 2 μm or more and 200 μm or less, for example. If the thickness of the transparent adhesive layer is 2 μm or more, the front surface antireflection layer 40 and the back surface antireflection layer 50 and the like can be reliably bonded, and if the thickness of the transparent adhesive layer is 200 μm or less, transparency (light). Transparency) can be maintained. The lower limit of the film thickness of the transparent adhesive layer is more preferably 5 μm or more, 10 μm or more, or 15 μm or more, and the upper limit is more preferably 150 μm or less, 160 μm or less, or 170 μm or less.

The method for forming the transparent adhesive layer is not particularly limited, and a known method used for manufacturing an adhesive tape or the like can be adopted. Specifically, a method of applying a coating material of a pressure-sensitive adhesive composition in which each component forming the above transparent adhesive layer is dissolved or dispersed in an appropriate organic solvent or water to the surface of a base material, and dried and cured. , Any method such as a method of coating each component forming the above transparent adhesive layer, a double bond-containing monomer, an oligomer, a cross-linking agent, etc. on a substrate without solvent and then cross-linking with radiation, an extruded laminating method, etc. Can be formed with.

When OCA is used, a transparent adhesive layer can be formed by peeling off the peeling film on the light peeling side of OCA and attaching the adhesive surface to the substrate.

[Core layer]
The core layer 32 serves to support the front surface antireflection layer 40 and the back surface antireflection layer 50. As the material of the core layer 32, the same materials as those of the surface transparent base material layer 42 and the back surface transparent base material layer 52 described above can be used.

As an example, the core layer 32 is made of polyethylene terephthalate (PET). As the polyethylene terephthalate forming the core layer 32, for example, it is preferable to use polyethylene terephthalate having a smaller haze (JISK7136: 2000) than general polyethylene terephthalate, so-called optical PET. By setting the polyethylene terephthalate forming the core layer 32 to have a small haze, it is possible to prevent the transparent laminated film 30 from appearing cloudy. The haze of polyethylene terephthalate forming the core layer 32 is, for example, 1.0% or less.

The thickness of the core layer 32 is not particularly limited and may be appropriately selected depending on the intended use. The thickness of the core layer 32 may be about 5 μm or more and 130 μm or less, and is preferably 10 μm or more and 100 μm or less in consideration of durability and handleability.

Here, the transparent laminated film 30 may have an opening 33a. For example, as shown in FIG. 2C1, when the shield portion 30A of the face shield 10 is configured by the transparent laminated film 30, an opening 33a is formed in the transparent laminated film 30 for use as the engaged portion 33 described above. Will be done.

Here, when the opening 33a is formed in the transparent laminated film 30 as shown in FIG. 2C1, it is preferable that the opening 33a has a radius of curvature of 0.5 mm or more at all points on the peripheral edge. Further, the opening 33a preferably has an oval shape, an elliptical shape, or a rounded corner shape. 3E to 3G are views showing an example of an opening 33a having an oval shape, an elliptical shape, or a rounded corner shape, respectively.

Here, the oval shape means a shape consisting of a pair of straight lines 33b and a curve 33c corresponding to a part of a circle or an ellipse connecting the pair of straight lines 33b, as shown in FIG. 3E. Further, the rounded corner shape means a shape in which the corner portion 33d of the rectangle is rounded, as shown in FIG. 3G.

Since the opening 33a has the above-mentioned shape, it is suppressed that the transparent laminated film 30 breaks from the opening 33a as a starting point.

When the transparent laminated film 30 has an opening 33a, in the transparent laminated film 60 with a protective film, a through hole is formed in the front surface protective film 61 and the back surface protective film 62 at a position overlapping the opening 33a of the transparent laminated film 30. It may have been done. In this case, the through holes of the front surface protective film 61 and the back surface protective film 62 may have the same shape as the opening 33a.

The thickness of the transparent laminated film 30 described above is preferably 60 μm or more and 500 μm or less. When the thickness of the transparent laminated film 30 is 60 μm or more, the strength and strength that can maintain the shape of the shield portion 30A can be obtained, so that the saliva of the wearer H adheres to the face of another person and the saliva of another person. It is possible to effectively prevent the droplets such as those from adhering to the face of the wearer H. Further, when the thickness of the transparent laminated film 30 is 500 μm or less, the transparency of the transparent laminated film 30 can be improved.

Further, it is preferable that the transparent laminated film 30 described above has a restorative function. As a result, when the transparent laminated film 30 is bent or rolled, the transparent laminated film 30 can be restored to a flat shape. Here, the recoverable function means that even after the object (transparent laminated film 30) is bent for a certain period of time, the bent object does not have creases and the object has a flat shape. Means the ability to restore to.

The transparent laminated film 30 described above preferably has a light reflectance of 1.0% or less and a total light transmittance (JISK7361-1: 1997) of 90% or more. This makes it possible to further improve the visibility when the transparent laminated film 30 is viewed from the front surface 301 side, and further improve the visibility when the transparent laminated film 30 is viewed from the back surface 302 side. Further, it is more preferable that the transparent laminated film 30 has a total light transmittance of 92% or more. Further, the transparent laminated film 30 preferably has a haze (JISK7136: 2000) of 1.2% or less, more preferably 1.0% or less, and further preferably 0.8% or less. Further, the transparent laminated film 30 preferably has a haze of 0.5% or less, and more preferably 0.3% or less.

In the transparent laminated film according to the embodiment, the reflectance of light may be 1.0% or less at 550 nm, and the total light transmittance may be 90% or more. In the present specification, when the reflectance is described as 550 nm without particular notice, the reflectance is assumed to be 550 nm.

The transparent laminated film 30 described above preferably has a transmittance of 1.0% or less in the ultraviolet region having a wavelength of 380 nm or less. As a result, even when the wearer H wearing the face shield 10 works in an environment exposed to direct sunlight, it is possible to prevent the wearer H from getting sunburned.

The transparent laminated film 30 described above preferably has a bending stress of 6 N / 20 mm or less. This makes it possible to improve the flexibility of the transparent laminated film 30. Therefore, in the transparent laminated film 30, when the shield portion 30A made from the transparent laminated film 30 is bent, it is possible to prevent the shield portion 30A from having creases or scratches.

In the above-mentioned transparent laminated film 30, the arithmetic average roughness Ra (JISB0601: 1994) of the front surface 301 and the back surface 302 is preferably 10 nm or less, and more preferably 1 nm or more and 8 nm or less. The ten-point average roughness Rz (JISB0601: 1994) of the front surface 301 and the back surface 302 is preferably 160 nm or less, and more preferably 50 nm or more and 155 nm or less. When Ra and Rz are in the above range, it has smoothness and scratch resistance is improved.

Method for manufacturing transparent laminated film, transparent laminated film with protective film and face shield Next, a method for manufacturing the transparent laminated film, transparent laminated film with protective film and face shield according to the present embodiment will be described. Here, first, a method for manufacturing the transparent laminated film 30 will be described.

First, the surface antireflection layer 40 is produced. At this time, for example, first, a resin film constituting the surface transparent base material layer 42 is prepared. Next, a coating liquid for forming a hard coat layer is applied onto the resin film, dried and irradiated with ultraviolet rays to form the surface hard coat layer 44. Next, a coating liquid for forming a high refractive index layer is applied onto the surface hard coat layer 44, dried and irradiated with ultraviolet rays to form the surface high refractive index layer 46. Next, a coating liquid for forming a low refractive index layer is applied onto the surface high refractive index layer 46, dried, and irradiated with ultraviolet rays to form the surface low refractive index layer 45. In this way, the surface antireflection layer 40 can be obtained.

Also, the back surface antireflection layer 50 is manufactured. At this time, for example, first, a resin film constituting the back surface transparent base material layer 52 is prepared. Next, a coating liquid for forming a hard coat layer is applied onto the resin film, dried and irradiated with ultraviolet rays to form the back surface hard coat layer 54. Next, a coating liquid for forming a high refractive index layer is applied onto the back surface hard coat layer 54, dried and irradiated with ultraviolet rays to form the back surface high refractive index layer 56. Next, a coating liquid for forming a low refractive index layer is applied onto the back surface high refractive index layer 56, dried, and irradiated with ultraviolet rays to form the back surface low refractive index layer 55. In this way, the back surface antireflection layer 50 can be obtained.

Then, the front surface antireflection layer 40 and the back surface antireflection layer 50 are adhered to each other via the transparent adhesive layer 31 to produce a transparent laminated film 30. In this way, the transparent laminated film 30 can be produced.

A method for manufacturing the transparent laminated film 30 including the core layer 32 as shown in FIGS. 3C and 3D will also be described. First, the front surface antireflection layer 40 and the back surface antireflection layer 50 are produced by the same method as the method for producing the front surface antireflection layer 40 and the back surface antireflection layer 50. In addition, the core layer 32 is prepared. Then, the surface antireflection layer 40 is adhered to one side surface of the core layer 32 via the first transparent adhesive layer 31a. Further, the back surface antireflection layer 50 is adhered to the surface opposite to one side of the core layer 32 via the second transparent adhesive layer 31b. In this way, the transparent laminated film 30 shown in FIGS. 3C and 3D can be produced.

Next, the front surface protective film 61 is attached to the front surface 301 of the obtained transparent laminated film 30, and the back surface protective film 62 is attached to the back surface 302. At this time, the front surface protective film 61 and the back surface protective film 62 each include a bonding layer (not shown), and may be attached to the transparent laminated film 30 by this bonding layer. In this way, the transparent laminated film 60 with a protective film can be produced. In the front surface protective film 61 and the back surface protective film 62, the front surface antireflection layer 40 and the back surface antireflection layer 50 are formed before the front surface antireflection layer 40 and the back surface antireflection layer 50 are bonded to each other via the transparent adhesive layer 31. May be attached separately to each.

Next, the face shield 10 is manufactured.

At this time, first, the transparent laminated film 60 with a protective film is processed into a predetermined shape. In this case, the transparent laminated film 60 with a protective film may be processed by punching using a bik mold, cutting using a drill, or laser processing using a laser. From the viewpoint of processing speed and productivity, the transparent laminated film 60 with a protective film is preferably processed by punching.

Next, the front surface protective film 61 and the back surface protective film 62 are removed from the transparent laminated film 60 with a protective film processed into a predetermined shape. As a result, the transparent laminated film 30 processed into a predetermined shape can be obtained.

Next, by attaching the transparent laminated film 30 processed into a predetermined shape to the holding member 20, the face shield 10 shown in FIG. 1 can be obtained.

As described above, according to the present embodiment, the transparent laminated film 30 includes a front surface antireflection layer 40 constituting the front surface 301 and a back surface antireflection layer 50 constituting the back surface 302. As a result, it is possible to suppress the reflection of the light incident from the front surface 301 side of the transparent laminated film 30 and the reflection of the light incident from the back surface 302 side of the transparent laminated film 30. That is, it is possible to improve the visibility when the transparent laminated film 30 is viewed from the front surface 301 side and the visibility when the transparent laminated film 30 is viewed from the back surface 302 side. Thereby, for example, when the wearer H wearing the face shield 10 is visually recognized, the visibility of the face F of the wearer H can be improved. Therefore, the visibility of the mouth of the wearer H can be improved, and smooth communication between the wearer H and others can be achieved. Further, for example, the wearer H wearing the face shield 10 provided with the shield portion 30A made of the transparent laminated film 30 is prevented from feeling uncomfortable or tired due to the light reflected on the back surface 302 of the transparent laminated film 30. can.

Further, the transparent laminated film 30 described above can achieve the following effects.
No deterioration occurs even after 100 times of alcohol wiping and disinfection.
Characters drawn with oil-based ink can be easily wiped off.
Even when rubbed 100 times with an H pencil, it is possible to prevent the surface from being scratched.
It is possible to wipe off the attached fingerprints and no residue remains after wiping.
The ability to achieve the above-mentioned effects will be described in Examples described later.

Further, according to the present embodiment, the transparent laminated film 30 further includes a transparent adhesive layer 31 for adhering the front surface antireflection layer 40 and the back surface antireflection layer 50. As a result, the transparent laminated film 30 including the front surface antireflection layer 40 constituting the front surface 301 and the back surface antireflection layer 50 constituting the back surface 302 can be easily manufactured.

Further, according to the present embodiment, the transparent adhesive layer 31 contains an acrylic pressure-sensitive adhesive. As a result, when the transparent laminated film 30 including the front surface antireflection layer 40 constituting the front surface 301 and the back surface antireflection layer 50 constituting the back surface 302 is produced, transparency is maintained and good optical characteristics are obtained. The transparent laminated film 30 having can be obtained.

Further, according to the present embodiment, the transparent laminated film 30 further includes a core layer 32 located between the front surface antireflection layer 40 and the back surface antireflection layer 50. This makes it possible to improve the durability and handleability of the transparent laminated film 30.

Further, according to the present embodiment, in the transparent laminated film 30, the core layer 32 is made of polyethylene terephthalate. Thereby, the durability of the transparent laminated film 30 can be further improved. Therefore, in particular, when the transparent laminated film 30 is provided with the opening 33a as shown in FIGS. 2E and 2F, it is possible to prevent the transparent laminated film 30 from breaking from the opening 33a as a starting point. In particular, when the shield portion 30A (transparent laminated film 30) is repeatedly attached to and detached from the holding member 20, or when the transparent laminated film 30 is violently attached and detached, it is possible to prevent the transparent laminated film 30 from breaking from the opening 33a.

Further, according to the present embodiment, the transparent laminated film 30 adheres the first transparent adhesive layer 31a for adhering the front surface antireflection layer 40 and the core layer 32, and the core layer 32 and the back surface antireflection layer 50. It is further provided with a second transparent adhesive layer 31b. As a result, the transparent laminated film 30 provided with the core layer 32 located between the front surface antireflection layer 40 and the back surface antireflection layer 50 can be easily manufactured.

Further, according to the present embodiment, the first transparent adhesive layer 31a and the second transparent adhesive layer 31b each contain an acrylic pressure-sensitive adhesive. As a result, when the transparent laminated film 30 including the front surface antireflection layer 40 constituting the front surface 301, the back surface antireflection layer 50 constituting the back surface 302, and the core layer 32 is produced, the transparency is maintained and the transparency is maintained. A transparent laminated film 30 having good optical characteristics can be obtained.

Further, according to the present embodiment, the surface antireflection layer 40 has a surface antireflection functional layer 41 arranged in order from the front surface 301 to the back surface 302, and a surface transparent base material layer 42. Further, the back surface antireflection layer 50 has a back surface antireflection function layer 51 arranged in order from the back surface 302 toward the front surface 301, and a back surface transparent base material layer 52. As a result, it is possible to impart a function of suppressing light reflection to the front surface antireflection layer 40 and the back surface antireflection layer 50 while increasing the overall strength of the front surface antireflection layer 40 and the back surface antireflection layer 50.

Further, according to the present embodiment, the front surface antireflection functional layer 41 is a coating layer coated on the front surface transparent base material layer 42, and the back surface antireflection function layer 51 is on the back surface transparent base material layer 52. It is a coated coating layer. As described above, since the front surface antireflection function layer 41 and the back surface antireflection function layer 51 are coating layers, the thicknesses of the front surface reflection prevention function layer 41 and the back surface antireflection function layer 51 can be easily controlled, and the transparent laminated film 30 can be easily controlled. Desired functions such as light reflectance and total light transmittance can be easily controlled.

Further, according to the present embodiment, the front surface antireflection function layer 41 and the back surface antireflection function layer 51 are each made of a cured product containing an acrylic monomer. As a result, the front surface antireflection function layer 41 and the back surface antireflection function layer 51 with high uniformity can be formed even by processing in a short time. In addition, both high hardness and good optical performance can be achieved at the same time.

Further, according to the present embodiment, the surface antireflection functional layer 41 includes a surface refraction layer 43 arranged in order from the front surface 301 to the back surface 302, and a surface hard coat layer 44. Further, the back surface antireflection function layer 51 includes a back surface refraction layer 53 arranged in order from the back surface 302 toward the front surface 301, and a back surface hard coat layer 54. This makes it possible to improve the scratch resistance of the front surface antireflection layer 40 and the back surface antireflection layer 50, while reducing the light reflectance of the front surface antireflection layer 40 and the back surface antireflection layer 50.

Further, according to the present embodiment, the surface hard coat layer 44 is a coating layer coated on the surface transparent base material layer 42, and the surface refraction layer 43 is a coating coated on the surface hard coat layer 44. The back surface hard coat layer 54 is a coating layer coated on the back surface transparent base material layer 52, and the back surface refractive layer 53 is a coating layer coated on the back surface hard coat layer 54. As described above, since the front surface refractive layer 43, the front surface hard coat layer 44, the back surface refractive layer 53, and the back surface hard coat layer 54 are coating layers, the thickness of each layer can be easily controlled, and the light reflection of the transparent laminated film 30 can be easily controlled. Desired functions such as rate and total light transmittance can be easily controlled.

Further, according to the present embodiment, the surface refractive index layer 43 includes a surface low refractive index layer 45 arranged in order from the front surface 301 toward the back surface 302, and a surface high refractive index layer 46. Further, the back surface refractive index layer 53 includes a back surface low refractive index layer 55 arranged in order from the back surface 302 toward the front surface 301, and a back surface high refractive index layer 56. As a result, the difference in the refractive index between the front surface low refractive index layer 45 and the front surface high refractive index layer 46 and the difference in the refractive index between the back surface low refractive index layer 55 and the back surface high refractive index layer 56 are used by an interference action. The refractive index of the light of the front surface antireflection layer 40 and the back surface antireflection layer 50 can be reduced more effectively.

Further, according to the present embodiment, the front surface high refractive index layer 46 includes a first surface high refractive index layer 47 arranged in order from the front surface 301 toward the back surface 302, and a second surface high refractive index layer 48. Includes. Further, the back surface high refractive index layer 56 includes a first back surface high refractive index layer 57 arranged in order from the back surface 302 toward the front surface 301, and a second back surface high refractive index layer 58. As a result, the difference in the refractive index between the front surface low refractive index layer 45 and the front surface high refractive index layer 46 and the difference in the refractive index between the back surface low refractive index layer 55 and the back surface high refractive index layer 56 are used by an interference action. The refractive index of the light of the front surface antireflection layer 40 and the back surface antireflection layer 50 can be further effectively reduced.

Further, according to the present embodiment, the refractive index of the first surface high refractive index layer 47 is higher than that of the second surface high refractive index layer 48. Further, the refractive index of the first back surface high refractive index layer 57 is higher than that of the second back surface high refractive index layer 58. As a result, the refractive index difference between the surface high refractive index layer 46 and the surface low refractive index layer 45 can be increased, the refractive index of the surface antireflection layer 40 can be lowered, and the surface high refractive index layer 46 and the surface hard coat can be reduced. The difference in refractive index from the layer 44 can be reduced, and the occurrence of interference fringes can be suppressed. Further, the refractive index difference between the back surface high refractive index layer 56 and the back surface low refractive index layer 55 can be increased, the refractive index of the back surface antireflection layer 50 can be lowered, and the back surface high refractive index layer 56 and the back surface hard coat layer can be reduced. The difference in refractive index from 54 can be reduced, and the occurrence of interference fringes can be suppressed.

Further, according to the present embodiment, the front surface transparent base material layer 42 and the back surface transparent base material layer 52 contain triacetyl cellulose or polyethylene terephthalate. Thereby, the transparency of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 can be improved. Further, when the front surface transparent base material layer 42 and the back surface transparent base material layer 52 contain triacetyl cellulose, the flexibility of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 can be effectively improved. can. Therefore, when the shield portion 30A made of the transparent laminated film 30 is bent, it is possible to prevent the shield portion 30A from having creases or scratches. Further, even when the size of the shield portion 30A is increased, it is possible to prevent the shield portion 30A from having creases or scratches. Therefore, since the front surface transparent base material layer 42 and the back surface transparent base material layer 52 contain triacetyl cellulose, a large-sized shield portion 30A can be easily produced.

Further, according to the present embodiment, the transparent laminated film 30 has a restorative function. As a result, even when the transparent laminated film 30 is bent or rolled, the transparent laminated film 30 can be restored to a flat shape without causing creases or scratches on the transparent laminated film 30.

Further, according to the present embodiment, in the transparent laminated film 30, the reflectance of light is 1.0% or less, and the total light transmittance is 90% or more. This makes it possible to further improve the visibility when the transparent laminated film 30 is viewed from the front surface 301 side, and further improve the visibility when the transparent laminated film 30 is viewed from the back surface 302 side.

Further, according to the present embodiment, the transparent laminated film 30 is used for the face shield 10 that protects the face F of the wearer H. As a result, it is possible to easily obtain the face shield 10 that can suppress the wearer H from feeling uncomfortable or tired while improving the visibility of the face F of the wearer H.

Further, according to the present embodiment, in the transparent laminated film 30, the opening 33a has a radius of curvature of 0.5 mm or more at all points on the peripheral edge. As a result, when stress is applied to the transparent laminated film 30, the stress is concentrated on a part of the peripheral edge of the opening 33a, and it is possible to prevent the transparent laminated film 30 from breaking from the opening 33a as a starting point. In particular, when the transparent laminated film 30 is used as the shield portion 30A of the face shield 10 and the opening 33a is used as the above-mentioned engaged portion 33, the following effects can be obtained. It is possible to prevent the transparent laminated film 30 from breaking due to the contact of the engaging portion 29 with the transparent laminated film 30 near the opening 33a. In particular, when the operation of disengaging the engaged portion 33 and the engaging portion 29 and the operation of engaging the engaged portion 33 and the engaging portion 29 are repeated many times, the transparent laminated film 30 Is suppressed from breaking from the opening 33a. Further, when the operation of disengaging the engaged portion 33 and the engaging portion 29 or the operation of engaging the engaged portion 33 with the engaging portion 29 is roughly performed, the transparent laminated film 30 opens. Breaking from 33a as a starting point is also suppressed.

Further, according to the present embodiment, in the transparent laminated film 30, the opening 33a has an oval shape, an elliptical shape, or a rounded corner shape. As a result, when stress is applied to the transparent laminated film 30, the stress is concentrated on a part of the peripheral edge of the opening 33a, and the transparent laminated film 30 is more effectively prevented from breaking from the opening 33a. can. In particular, when the transparent laminated film 30 is used as the shield portion 30A of the face shield 10 and the opening 33a is used as the above-mentioned engaged portion 33, the following effects can be obtained. It is possible to more effectively prevent the transparent laminated film 30 from breaking due to the contact of the engaging portion 29 with the transparent laminated film 30 near the opening 33a.

Further, according to the present embodiment, the size of the transparent laminated film 30 is 180-400 mm in the vertical direction (the direction in which the central axis CL is stretched) and the lateral direction (in the direction of the central axis CL) in FIG. 2C1 for the purpose of protecting the entire face. It may have a height and width of 180-400 mm in the direction perpendicular to the stretching direction). More preferably, it is 200-300 mm in the vertical direction and 220-300 mm in the horizontal direction.

Further, according to the present embodiment, the transparent laminated film 60 with a protective film includes the transparent laminated film 30 according to the present embodiment, the surface protective film 61 that protects the surface 301 of the transparent laminated film 30, and the transparent laminated film 30. It is provided with a back surface protective film 62 that protects the back surface 302 of the above. This makes it possible to prevent the front surface 301 and the back surface 302 of the transparent laminated film 30 from being scratched when the transparent laminated film 30 is processed. Further, when the transparent laminated film 30 is shipped and transported, it is possible to prevent the front surface 301 and the back surface 302 from being contaminated by foreign matter or the like.

Although the example in which the holding member 20 of the face shield 10 is a so-called eyeglass frame type in the above-described embodiment has been described, the present invention is not limited to this. For example, the holding member 20 may be a so-called hair band type, a headband type, or the like. In this case, as shown in FIG. 4A, the holding member 20 may have a band 25 that covers the head of the wearer H in a circumferential shape. The material of the band 25 may be an elastic body such as rubber as well as resin and cardboard. Further, the holding member 20 may have a protective member 26 attached to the band 25 and in contact with the forehead of the wearer H. The protective member 26 preferably contains a cushioning material such as a sponge. As a result, it is possible to prevent the wearer H wearing the face shield 10 from feeling uncomfortable. In the illustrated example, the band 25 covers only a part of the head of the wearer H, but the band 25 may cover the entire circumference of the head of the wearer H.

Further, in the above-described embodiment, an example in which the shield portion 30A covers the entire face F of the wearer H has been described, but the present invention is not limited to this. For example, as shown in FIG. 4B, the shield portion 30A (transparent laminated film 30) may cover only a part of the face F of the wearer H. In this case, the holding member 20 is connected to the chin pad 27 that abuts on the chin J of the wearer H and the chin pad 27, and is hooked on the ear E of the wearer H. It may have only one (shown) and. Of these, the material of the jaw pad 27 may be resin, cardboard, or the like. The hook portion 28 may be a string-shaped member, and the material of the hook portion 28 may be an elastic body such as rubber. In this modification, the shield portion 30A covers the mouth M and the nose N of the wearer H. As a result, it is possible to suppress the attachment of saliva and other droplets due to sneezing and coughing of the wearer H to the face of another person, and it is possible to improve the visibility of the mouth of the wearer H. Can facilitate smooth communication. The shield portion 30A may cover only the vicinity of the mouth M without covering the nose N of the wearer H.

Further, in the above-described embodiment, an example in which the transparent laminated film 30 is used for the face shield 10 that protects the face F of the wearer H has been described, but the present invention is not limited to this. For example, as shown in FIG. 5, the transparent laminated film 30 may be used as a partition for partitioning the space of the room R. In this case, the transparent laminated film 30 may be suspended from, for example, a rod-shaped member B attached to the wall W, or may be suspended from a ceiling (not shown).

[Example]
Next, specific examples in the above-described embodiment will be described.

(Example A1)
First, the transparent laminated film 30 shown in FIG. 3A was produced. At this time, first, the surface antireflection layer 40 was prepared. When producing the surface antireflection layer 40, first, a triacetyl cellulose film (refractive index 1.49) having a thickness of 60 μm was prepared as the surface transparent base material layer 42. Next, a coating liquid for forming a hard coat layer having the following formulation was applied onto the triacetyl cellulose film, dried and irradiated with ultraviolet rays to form a surface hard coat layer 44 having a thickness of 10 μm, a refractive index of 1.54 and a pencil hardness of 2H. .. Next, a coating liquid for forming a high refractive index layer of the following formulation was applied onto the surface hard coat layer 44, dried and irradiated with ultraviolet rays to form a surface high refractive index layer 46 having a thickness of 150 nm and a refractive index of 1.63. Next, a coating liquid for forming a low refractive index layer of the following formulation is applied onto the surface high refractive index layer 46, dried and irradiated with ultraviolet rays to form a surface low refractive index layer 45 having a thickness of 100 nm and a refractive index of 1.30. , A surface antireflection layer 40 was obtained.

<Preparation of coating liquid for forming a hard coat layer>
Photopolymerization initiator (BASF, Irgacure 127, 2-hydroxy-1- {4- [4- (2-hydroxy-2-methylpropionyl) benzyl] phenyl} -2-methylpropan-1-one) is 1 .6 parts by mass and 58.3 parts by mass of a diluting solvent (methyl isobutyl ketone / cyclohexanone = 8/2) were added, and the mixture was stirred until there was no undissolved residue. Add 20 parts by mass of a photo-curing resin (Arakawa Chemical Co., Ltd., Beam Set 577) and 20 parts by mass of a high-refractive index resin (Polylite RX-4800, manufactured by DIC Corporation) and stir until there is no undissolved residue. did. Finally, 0.1 parts by mass of a leveling agent (Seika Beam 10-28 (MB) manufactured by Dainichiseika Kogyo Co., Ltd.) was added and stirred to prepare a coating liquid for forming a hard coat layer.

<Preparation of coating liquid for forming a high refractive index layer>
0.1 part by mass of a photopolymerization initiator (BASF, Irgacure 127) and 92.6 parts by mass of a diluting solvent (methyl isobutyl ketone / cyclohexanone / methyl ethyl ketone = 4/2/4) were added, and the mixture was stirred until there was no undissolved residue. .. 1.25 parts by mass of a photo-curing resin (Beam Set 577 manufactured by Arakawa Chemical Co., Ltd.) was added thereto, and the mixture was stirred until there was no undissolved residue. Furthermore, 6 parts by mass of zirconium oxide (MZ-230X manufactured by Sumitomo Osaka Cement Co., Ltd., solid content 32.5% by mass, average primary particle diameter 15 to 50 nm), leveling agent (manufactured by Dainichiseika Kogyo Co., Ltd., Seika Beam 10-28) MB)) 0.05 parts by mass were added and stirred to prepare a coating liquid for forming a high refractive index layer.

<Preparation of coating liquid for forming a low refractive index layer>
0.2 parts by mass of a photopolymerization initiator (Irgacure 127, manufactured by BASF) and 91.1 parts by mass of a diluting solvent (MIBK / AN = 7/3) were added, and the mixture was stirred until there was no undissolved residue. Here, 1.0 part by mass of a photocurable resin (KAYARAD-PET-30 manufactured by Nippon Kayaku Co., Ltd.), 7.6 parts by mass of hollow silica particles (solid content 20% by mass, average primary particle diameter 60 nm), and a leveling agent (large). 0.1 parts by mass of Seikabeam 10-28 (MB) manufactured by Nisseika Kogyo Co., Ltd. was added and stirred to prepare a coating liquid for forming a low refractive index layer.

Next, the back surface antireflection layer 50 was produced. When producing the back surface antireflection layer 50, first, a triacetyl cellulose film (refractive index 1.49) having a thickness of 60 μm was prepared as the back surface transparent base material layer 52. Next, the coating liquid for forming a hard coat layer of the above formulation was applied onto the triacetyl cellulose film, dried and irradiated with ultraviolet rays to form a back surface hard coat layer 54 having a thickness of 10 μm, a refractive index of 1.54 and a pencil hardness of 2H. .. Next, the coating liquid for forming a high refractive index layer of the above formulation was applied onto the back surface hard coat layer 54, dried and irradiated with ultraviolet rays to form a back surface high refractive index layer 56 having a thickness of 150 nm and a refractive index of 1.63. Next, the coating liquid for forming a low refractive index layer of the above formulation is applied onto the back surface high refractive index layer 56, dried and irradiated with ultraviolet rays to form a back surface low refractive index layer 55 having a thickness of 100 nm and a refractive index of 1.30. , The back surface antireflection layer 50 was obtained.

Next, the front surface antireflection layer 40 and the back surface antireflection layer 50 were adhered to each other via a transparent adhesive layer (Panaclean series PD-S1, thickness 25 μm manufactured by Panac Co., Ltd.) to prepare a transparent laminated film 30. The layer structure of the obtained transparent laminated film 30 is as follows.
Low bending / High bending / Hard coat / TAC / Stickiness / TAC / Hard coat / High bending / Low bending In the above, "low bending" means a front surface low refractive index layer or a back surface low refractive index layer (hereinafter,). Similarly). Further, "high bending" means a front surface high refractive index layer or a back surface high refractive index layer (the same shall apply hereinafter). Further, "hard coat" means a front surface hard coat layer or a back surface hard coat layer (the same shall apply hereinafter). Further, "TAC" means a triacetyl cellulose film (the same applies hereinafter). Further, "sticky" means a transparent adhesive layer.

(1) Reflectance measurement test Next, a reflectance measurement test was carried out on the transparent laminated film 30.

At this time, first, a sample having a size of 20 mm × 20 mm was cut out from the obtained transparent laminated film 30. Next, a black resin plate was brought into close contact with the back surface of the sample. Next, the surface of the sample was irradiated with light so that the incident angle was 5 °. At this time, the wavelengths of the light were set to 450 nm, 550 nm and 650 nm, and the surface of the sample was irradiated with the light for each wavelength. Then, the reflection spectrum of light was measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation), and the reflectance of light at each wavelength was calculated.

(2) Transmittance measurement test In addition, a transmittance measurement test was conducted on the transparent laminated film 30.

At this time, first, a sample having a size of 20 mm × 20 mm was cut out from the obtained transparent laminated film 30. Next, the surface of the sample was irradiated with light so that the incident angle was 90 °. At this time, the wavelengths of the light were set to 450 nm, 550 nm and 650 nm, and the surface of the sample was irradiated with the light for each wavelength. Then, the transmittance of light was measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation), and the transmittance of light at each wavelength was calculated.

(3) Wearability evaluation test In addition, a wearability evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 1 was produced using the obtained transparent laminated film 30. Next, five experimenters were randomly selected from men and women over the age of 22. Then, five selected experimenters performed office work with the face shield 10 attached. After that, we interviewed five experimenters who had done the office work for one hour to see if they had the impression that they were wearing the face shield 10.

(4) Visibility evaluation test In addition, a visibility evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 1 was produced using the obtained transparent laminated film 30. Next, five experimenters were randomly selected from men and women over the age of 22. Then, the visibility of the facial expressions of the five experimenters wearing the face shield 10 was confirmed. At this time, the facial expression of the experimenter was observed from a distance of about 1 m to 2 m from the experimenter in a general indoor environment illuminated by a fluorescent lamp. In addition, the observer observed the facial expression of the experimenter while moving about 20 ° to the left and right around the surface 301 of the face shield 10 from the state facing the experimenter.

(5) Bending stress measurement test In addition, a bending stress measurement test was carried out on the transparent laminated film 30.

At this time, first, a sample S having a size of 20 mm × 50 mm was cut out from the obtained transparent laminated film 30.

Also, a measuring instrument 700 was prepared. As the measuring instrument 700, a tensile compression tester (MCT-2150 manufactured by A & D Co., Ltd.) was used. As shown in FIG. 6, the measuring instrument 700 includes a pair of support bases 710 and an indenter 720. Then, a pair of support bases 710 were arranged apart from each other, and the sample S was placed on the support bases 710. Next, the sample S was deformed by pressing the indenter 720 against the sample S. Then, when the distance D2 between the tip of the indenter 720 and the upper end of the support base 710 (that is, the amount of deformation of the sample S) is 2 mm, the load applied to the indenter 720 is applied to the transparent laminated film 30. The bending stress was used. Here, the distance between the pair of support pedestals 710 is 10 mm, and the support pedestal 710 has a semi-circular shape with an upper end shape having a radius of 5 mm in a cross section along the direction in which the support pedestals 710 are separated from each other and the vertical direction. 710 was used. Further, as the indenter 720, a support base 710 having a semi-circular tip shape having a radius of 5 mm was used in a cross section along the direction in which the support bases 710 are separated from each other and in the vertical direction.

(6) Contact evaluation test In addition, a contact evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 1 was produced using the obtained transparent laminated film 30. Next, five experimenters were randomly selected from men and women over the age of 22. Then, five selected experimenters pressed the shield portion 30A of the face shield 10 against the shoulders and chest of the experimenter by moving the neck greatly while wearing the face shield 10. After that, we interviewed the experimenter about the strength of the repulsive force from the shield portion 30A when the shield portion 30A hits the shoulder or chest (the strength of the impression that hinders the movement of the neck).

(7) Drop strength evaluation test In addition, a drop strength evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 1 was produced using the obtained transparent laminated film 30. Next, a drop test was performed on the face shield 10. At this time, first, one temple portion 21 of the holding member 20 of the face shield 10 was picked, and the face shield 10 was lifted so that the temple portion 21 had a height of 170 mm from the ground. After that, the face shield 10 was freely dropped on the ground. In this way, a drop test was performed on the face shield 10. Then, such a drop test was repeated 10 times, and it was confirmed whether or not there was a change in the appearance of the face shield 10.

(8) Scratch resistance evaluation test In addition, a scratch resistance evaluation test of the transparent laminated film 30 was carried out.

At this time, first, the obtained transparent laminated film 30 was picked with a finger to attach a fingerprint to the transparent laminated film 30. Next, the attached fingerprint was wiped off with Kimwipe S-200 (trade name). At this time, the fingerprints were wiped off with the Kimwipe S-200 in a dry state without impregnating the Kimwipe S-200 with a chemical such as alcohol. Then, such a test was repeated three times, and it was confirmed whether or not the transparent laminated film 30 after wiping off the fingerprint was scratched. In the three tests, fingerprints were attached to the same positions by pinching substantially the same portion of the transparent laminated film 30 with a finger.

Further, it was confirmed whether or not the transparent laminated film 30 was scratched when the pencil was rubbed against the transparent laminated film 30. At this time, after pulling out the center of a pencil having a hardness of H by about 5 mm, the lower surface of the core was flattened by rubbing with sandpaper. Next, the pencil is rubbed against the transparent laminated film 30 with the pencil tilted with respect to the surface 301 so that the angle between the lower surface of the core and the surface 301 of the transparent laminated film 30 is about 45 °. Wearing. Further, when the pencil is rubbed against the transparent laminated film 30, the pencil is placed on the transparent laminated film 30 so that the moving distance of the pencil is about 3 cm and the amount of dent on the surface 301 of the face shield 10 is about 5 mm or more and about 10 mm. Rubbed against. Then, such a test was repeated 100 times, and it was confirmed whether or not the transparent laminated film 30 after rubbing the pencil was scratched.

(9) Alcohol resistance evaluation test In addition, an alcohol resistance evaluation test of the transparent laminated film 30 was carried out.

At this time, first, the surface 301 of the transparent laminated film 30 was wiped with Kimwipe S-200 (trade name) soaked with sufficient ethanol. At this time, the surface 301 of the transparent laminated film 30 was wiped so that the Kimwipe S-200 came into contact with the end surface located between the front surface 301 and the back surface 302 of the transparent laminated film 30. Then, such a test was repeated 100 times, and it was confirmed whether or not there was a change in the appearance of the transparent laminated film 30.

(10) Splash Prevention Functionality Evaluation Test In addition, a splash prevention functionality evaluation test of the transparent laminated film 30 was carried out.

At this time, first, the alcohol spray bottle (capacity 30 ml) was filled with colored ink (Shachihata replenishment ink (Capless 9 / X stamper XLR-20N red 20 ml)). Next, A3 paper was attached to the wall surface. Next, an experimenter wearing the face shield 10 faced a position 50 cm away from the wall surface. Next, the spray was placed between the experimenter's mouth and the face shield 10 so that the spray nozzles faced the wall surface. Then, the colored ink was sprayed from the spray. It was confirmed whether or not colored ink had adhered to the paper attached to the wall surface after spraying.

(11) UV Transmittance Measurement Test In addition, a UV transmittance measurement test of the transparent laminated film 30 was carried out.

At this time, the UV transmittance measurement test was carried out in the same manner as the above-mentioned transmittance measurement test except that the wavelength of the irradiated light was 380 nm.

(12) Antifouling property evaluation test In addition, an antifouling property evaluation test of the transparent laminated film 30 was carried out.

At this time, first, a line was drawn on the surface 301 of the obtained transparent laminated film 30 with an oil-based marker, McKee manufactured by Zebra Co., Ltd., and immediately after that, it was wiped off with Kimwipe S-200 (trade name). At this time, the fingerprints were wiped off with the Kimwipe S-200 in a dry state without impregnating the Kimwipe S-200 with a chemical such as alcohol.

(Example A2)
The transparent laminated film 30 was produced in the same manner as in Example A1 except that the transparent laminated film 30 shown in FIG. 3C was produced. Further, in the same manner as in Example A1, a reflectance measurement test, a transmission rate measurement test, a wearability evaluation test, a visibility evaluation test, a bending stress measurement test, a contact evaluation test, a drop strength evaluation test, and a scratch resistance evaluation test, An alcohol resistance evaluation test, a splash prevention functionality evaluation test, a UV transmittance measurement test, and an antifouling property evaluation test were conducted.

When the transparent laminated film 30 shown in FIG. 3C was produced, the front surface antireflection layer 40 and the back surface antireflection layer 50 were produced in the same manner as in Example A1. Further, in parallel with the production of the front surface antireflection layer 40 and the back surface antireflection layer 50, a triacetyl cellulose film (refractive index 1.49) having a thickness of 60 μm was prepared as the core layer 32.

Next, the front surface antireflection layer 40 and the core layer 32 are adhered to each other via the first transparent adhesive layer 31a (Panaclean series PD-S1, thickness 25 μm manufactured by Panac Co., Ltd.), and the core layer 32 and the back surface antireflection are prevented. The layers 50 were bonded to each other via a second transparent adhesive layer 31b (Panaclean series PD-S1, manufactured by Panac Co., Ltd., thickness 25 μm) to prepare a transparent laminated film 30. The layer structure of the obtained transparent laminated film 30 is as follows.
Low bending / High bending / Hard coat / TAC / Sticky / TAC / Sticky / TAC / Hard coat / High bending / Low bending

(Comparative Example 1)
The transmittance measurement test was carried out in the same manner as in Example A1 except that a commercially available transparent film (YF-850L (trade name) manufactured by Yamamoto Optical Co., Ltd.) was used without producing the transparent laminated film 30. Transmittance measurement test, wearability evaluation test, visibility evaluation test, bending stress measurement test, contact evaluation test, drop strength evaluation test, scratch resistance evaluation test, alcohol resistance evaluation test, splash prevention functionality evaluation test, UV transmission A rate measurement test and an antifouling property evaluation test were conducted.

Here, when the cross section of the transparent film according to Comparative Example 1 was analyzed by SEM, it was found to have a three-layer structure in which a resin layer having a thickness of 3 μm was laminated above and below a resin layer having a thickness of 150 μm. When the upper and lower resin layers of the three-layer transparent film according to Comparative Example 1 were observed at a magnification of 30,000 times, a cone having a height of 210-220 nm was observed on the surface side of each of the upper and lower resin layers. Many convex shapes were confirmed.

(Comparative Example 2)
The transmittance measurement test was carried out in the same manner as in Example A1 except that a commercially available transparent film (YF-800L (trade name) manufactured by Yamamoto Optical Co., Ltd.) was used without producing the transparent laminated film 30. Transmittance measurement test, wearability evaluation test, visibility evaluation test, bending stress measurement test, contact evaluation test, drop strength evaluation test, scratch resistance evaluation test, alcohol resistance evaluation test, splash prevention functionality evaluation test, UV transmission A rate measurement test and an antifouling property evaluation test were conducted.

Here, when the cross section of the transparent film according to Comparative Example 2 was analyzed by SEM, it was a single resin layer having a thickness of 200 μm.

The above results are shown in Tables 1 to 4. Table 1 shows the results of the reflectance measurement test. Table 2 shows the results of the transmittance measurement test. Table 3 shows the results of the wearability evaluation test, the visibility evaluation test, the bending stress measurement test, the contact property evaluation test, and the drop strength evaluation test. Table 4 shows the results of the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality evaluation test. Furthermore, Table 5 shows the results of the UV transmittance measurement test and the antifouling property evaluation test.

In the column of the wearability evaluation test in Table 3 above, "○" indicates that the wearer cannot be seen on the transparent laminated film or the transparent film (hereinafter, simply referred to as the transparent laminated film, etc.), and the face shield is mounted. It means that it was a hearing result that there was no impression that it was. In addition, "x" is a hearing result that the wearer can be seen on the transparent laminated film, which hinders the work and gives the impression that the face shield is worn, which makes the person feel tired. It means that there was.

Further, in the column of the visibility evaluation test in Table 3 above, "○" means that the facial expression of the wearer could be clearly confirmed. Further, “x” means that the observer is reflected on the transparent laminated film or the like, so that the confirmation of the facial expression of the wearer is hindered regardless of the angle at which the wearer is visually recognized.

Further, in the column of the contact evaluation test in Table 3 above, "○" is a hearing result that the repulsive force from the shield portion 30A is weak even when the shield portion hits the wearer's shoulder or chest. It means that there was. “Δ” means that when the shield portion hits the wearer's shoulder or chest, the repulsive force from the shield portion is a little strong.

Furthermore, in the drop strength evaluation test column of Table 3 above, "○" means that no deformation or scratches were confirmed on the transparent laminated film of the face shield.

In the "fingerprint" column of the scratch resistance evaluation test in Table 4 above, "○" means that the fingerprint could be wiped off without causing scratches on the transparent laminated film or the like. Further, "x" means that when the fingerprint is wiped off, the transparent laminated film or the like is scratched, and the transparent laminated film or the like has an appearance that becomes cloudy due to fine scratches.

Further, in the "pencil" column of the scratch resistance evaluation test in Table 4 above, "○" means that the transparent laminated film or the like was not scratched. Further, "Δ" means that a thin scratch has occurred on the transparent laminated film or the like. Further, "x" means that the transparent laminated film or the like is deeply scratched and the appearance of the transparent laminated film or the like is deteriorated.

Further, in the column of the alcohol resistance evaluation test in Table 4 above, "○" means that the appearance of the transparent laminated film or the like did not change. Further, "x" means that the transparent laminated film or the like is discolored and the appearance is deteriorated.

Furthermore, in the column of the splash prevention functionality evaluation test in Table 4 above, "○" means that the colored ink was not attached to the paper. Further, "x" means that colored ink was observed on the paper.

In the column of the antifouling property evaluation test in Table 5 above, "○" means that the line disappeared after wiping. Further, "x" means that the oil-based ink could not be wiped off and the line remained clearly.

As a result, as shown in Table 1, in the transparent film according to Comparative Example 1, the reflectance of light having a wavelength of 550 nm was 0.5%. Further, in the transparent film according to Comparative Example 2, the reflectance of light having a wavelength of 550 nm was 8.7%. On the other hand, in the transparent laminated film 30 according to Example A1 and Example A2, the reflectance of light having a wavelength of 550 nm was 0.1%. As described above, in the transparent laminated film 30 according to Example A1 and Example A2, the reflectance of light having a wavelength of 550 nm could be reduced. Further, in the transparent laminated film 30 according to Examples A1 and A2, the reflectance of light having a wavelength of 450 nm is 0.4%, and the reflectance of light having a wavelength of 450 nm is 0.5% and 0.4%. Met. As described above, in the transparent laminated film 30 according to Example A1 and Example A2, the reflectance of light could be reduced at each of the wavelengths of light of 450 nm, 550 nm and 650 nm. Therefore, it was found that the transparent laminated film 30 according to the present embodiment can reduce the reflectance of light.

Further, as shown in Table 2, in the transparent film according to Comparative Example 2, the light transmittance was 90% or less in each of the cases where the wavelength of light was 450 nm, 550 nm and 650 nm. On the other hand, in the transparent laminated film 30 according to Example A1 and Example A2, the light transmittance was 96% or more in each of the cases where the wavelength of light was 450 nm, 550 nm and 650 nm. As described above, in the transparent laminated film 30 according to Example A1 and Example A2, the light transmittance could be improved at each of the light wavelengths of 450 nm, 550 nm and 650 nm. In particular, even when the transparent laminated film 30 includes the front surface antireflection layer 40 constituting the front surface 301 and the back surface antireflection layer 50 constituting the back surface 302, the light transmittance is high as in Comparative Example 1. It was possible to obtain the same transmittance as the film. Therefore, it was found that the transparent laminated film 30 according to the present embodiment can improve the light transmittance.

Further, as shown in Table 3, in the wearability evaluation test, in the transparent film according to Comparative Example 2, the reflection of the wearer on the transparent film can be seen, which hinders the work and attaches the face shield. It was a hearing result that I had the impression that I was feeling tired. On the other hand, in Examples A1 and A2, the hearing result was that the wearer could not be seen on the transparent laminated film 30 and there was no impression that the face shield was worn. As described above, in the transparent laminated film 30 according to Examples A1 and A2, the reflection of the wearer on the transparent laminated film 30 can be reduced, and the wearer wearing the face shield 10 is prevented from feeling tired. did it.

Further, as shown in Table 3, in the visibility evaluation test, in the transparent film according to Comparative Example 2, the observer is reflected on the transparent film, so that the wearer's facial expression is expressed regardless of the viewing angle of the wearer. Confirmation was hindered. On the other hand, in the transparent laminated film 30 according to Example A1 and Example A2, the facial expression of the wearer could be clearly confirmed.

Further, as shown in Table 3, the bending stress of the transparent film according to Comparative Example 2 was 0.79 N / 20 mm. On the other hand, in the transparent laminated film 30 according to Example A1 and Example A2, the bending stress was 0.24N / 20mm and 0.41N / 20mm. As described above, in the transparent laminated film 30 according to Example A1 and Example A2, the bending stress could be reduced. That is, it was found that the transparent laminated film 30 according to Example A1 and Example A2 can improve the flexibility. In particular, even when the transparent laminated film 30 includes the front surface antireflection layer 40 constituting the front surface 301 and the back surface antireflection layer 50 constituting the back surface 302, the film has a low bending stress as in Comparative Example 1. The same bending stress could be obtained. Therefore, it has been found that the transparent laminated film 30 according to the present embodiment can prevent the shield portion 30A from having creases or scratches when the shield portion 30A made from the transparent laminated film 30 is bent. ..

Further, as shown in Table 3, in the contact evaluation test, in the face shield according to Comparative Example 2, when the shield portion hits the wearer's shoulder or chest, the repulsive force from the shield portion is a little strong. Met. On the other hand, in the face shield 10 according to Examples A1 and A2, the hearing result was that the repulsive force from the shield portion 30A was weak even when the shield portion 30A hit the wearer's shoulder or chest. Therefore, it was found that even when the shield portion 30A hits the wearer's shoulder or chest, the wearer can be prevented from feeling uncomfortable, and the wearer can concentrate on the work without feeling stress.

Further, as shown in Table 3, in the drop strength evaluation test, no deformation or scratches were confirmed on the transparent laminated film 30 of the face shield 10 in the face shield 10 according to Examples A1 and A2. As described above, even when the transparent laminated film 30 includes the front surface antireflection layer 40 constituting the front surface 301 and the back surface antireflection layer 50 constituting the back surface 302, as in Comparative Example 1 and Comparative Example 2. It was found that the drop strength could be suppressed from being lowered as compared with the transparent film not provided with the front surface antireflection layer 40 and the back surface antireflection layer 50.

Further, as shown in Table 4, in the scratch resistance evaluation test, in the transparent film according to Comparative Example 1, when the fingerprint was wiped off, the transparent film was scratched, and the transparent film became cloudy due to fine scratches. Was there. On the other hand, in the transparent laminated film 30 according to Examples A1 and A2, fingerprints could be wiped off without causing scratches on the transparent laminated film 30. Further, in the transparent film according to Comparative Example 1, when a pencil was rubbed against the transparent film, a thin scratch was generated on the transparent film. Further, in the transparent film according to Comparative Example 2, when a pencil was rubbed against the transparent film, the transparent film was deeply scratched and the appearance of the transparent film was deteriorated. On the other hand, in the transparent laminated film 30 according to Examples A1 and A2, when the pencil was rubbed against the transparent laminated film 30, the transparent laminated film 30 was not scratched. As described above, in the transparent laminated film 30 according to Examples A1 and A2, it was possible to suppress the deterioration of the scratch resistance of the transparent laminated film 30.

Further, as shown in Table 4, in the alcohol resistance evaluation test, in the transparent film according to Comparative Example 1, the transparent film was discolored and the appearance was deteriorated. On the other hand, in the transparent laminated film 30 according to Examples A1 and A2, the appearance of the transparent laminated film 30 did not change. As described above, in the transparent laminated film 30 according to Examples A1 and A2, it was possible to suppress the deterioration of the scratch alcohol resistance of the transparent laminated film 30.

Further, as shown in Table 4, in the splash prevention functionality evaluation test, even in the face shield 10 according to Examples A1 and A2, droplets of a specific size are scattered in front of the wearer H of the face shield 10. I was able to prevent it.

Further, as shown in Table 5, the transparent film according to Comparative Example 1 had a UV transmittance of 97.0%, and the transparent film according to Comparative Example 2 had a UV transmittance of 81.8%. On the other hand, in the transparent laminated film 30 according to Example A1 and Example A2, the UV transmittance was 0.1%, respectively. As described above, in the transparent laminated film 30 according to Example A1 and Example A2, the UV transmittance could be reduced. This means that the wearer H can be less likely to get sunburned even when the wearer H is outdoors in an environment exposed to direct sunlight.

Further, as shown in Table 5, in the antifouling property evaluation test, the oil-based ink could not be wiped off with the transparent films according to Comparative Example 1 and Comparative Example 2, and the lines were clearly left. On the other hand, in the transparent laminated film 30 according to Example A1 and Example A2, the oil-based ink could be wiped off, and the line disappeared after wiping off. As described above, in the transparent laminated film 30 according to Example A1 and Example A2, the oil-based ink that is difficult to remove could be easily removed. As a result, even if dirt adheres to the face shield 10, the dirt can be easily wiped off from the face shield 10, and the face shield 10 can be easily restored to a clean state.

Further, the effects of the transparent laminated film 30 provided with the core layer 32 made of polyethylene terephthalate were examined according to the following Examples B1 to B6 and Comparative Examples 3 and 4.

(Example B1)
A transparent laminated film 30 was prepared in the same manner as in Example A2 except that a polyethylene terephthalate film having a thickness of 50 μm (manufactured by Toray Industries, Inc., Lumirror (registered trademark) 50U483 (trade name)) was prepared as the core layer 32. .. Further, in the same manner as in Example A1, the reflectance measurement test, the transmittance measurement test, the wearability evaluation test, the visibility evaluation test, the drop strength evaluation test, the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality. An evaluation test and a UV transmittance measurement test were conducted.

(13) Detachment test In addition, a detachment test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 1 was produced using the obtained transparent laminated film 30. Next, an operation of disengaging the engaged portion 33 (opening 33a) provided in the shield portion 30A and the engaging portion 29 provided in the holding member 20, and the engaged portion 33 and the engaging portion 29 are performed. The operation of engaging with was repeated. Then, if the cycle of the operation of disengaging the engaged portion 33 and the engaging portion 29 and the operation of engaging the engaged portion 33 and the engaging portion 29 is repeated many times, the opening of the shield portion 30A is performed. It was verified whether or not a break occurred in the vicinity of 33a.

(14) Pseudo-fracture test In addition, a pseudo-fracture test was carried out to evaluate the difficulty of breaking of the transparent laminated film 30 in the vicinity of the opening 33a of the transparent laminated film 30.

In the pseudo-break test, when the transparent laminated film 30 constitutes the shield portion 30A and the opening 33a is used as the engaged portion 33 that engages with the engaging portion 29 of the holding member 20, the opening of the transparent laminated film 30. The load applied in the vicinity of 33a was reproduced. Then, the resistance of the transparent laminated film 30 to the load was evaluated.

In the pseudo-breaking test, first, a rectangular sample was cut out from the obtained transparent laminated film 30. Next, an oval-shaped opening 33a having a straight line 33b and a curve 33c was formed in the sample to prepare the test piece 30B shown in FIG. 7. The opening 33a had a radius of curvature of 0.5 mm or more at all points on the peripheral edge. The width w1 of the opening 33a in the major axis direction was 11 mm. Further, the width w2 of the opening 33a in the minor axis direction was 4 mm. The curve 33c of the opening 33a had a shape corresponding to a part of a circle having a radius of 2 mm.

Next, a first gripping tool 810 and a second gripping tool 820 capable of sandwiching and gripping the transparent laminated film 30 from both sides in the thickness direction DA (see FIG. 8) were prepared. Then, a part of the transparent laminated film 30 was gripped by each of the first gripping tool 810 and the second gripping tool 820 as shown in FIG. Specifically, the first gripping tool 810 was used to grip the portion of the curve 33c of the opening 33a including the point P1 forming the end portion of the opening 33a in the long axis direction. Further, the second gripping tool 820 was used to grip the portion including the point P2 where the curve 33c and the straight line 33b gripped by the first gripping tool 810 are connected.

Next, with the position of the first gripping tool 810 fixed, the second gripping tool 820 was gradually moved in the thickness direction DA of the transparent laminated film 30. The movement of the second gripper 820 in the thickness direction DA was performed until the transparent laminated film 30 broke. Then, the load applied to the first gripping tool 810 when the transparent laminated film 30 was broken and the amount of movement of the second gripping tool 820 when the transparent laminated film 30 was broken were measured. The load applied to the first gripping tool 810 when the transparent laminated film 30 breaks is referred to as a breaking stress. Further, the amount of movement of the second gripper 820 from the initial position when the transparent laminated film 30 is broken is referred to as the amount of movement at break. It is considered that the larger the stress at break and the movement amount at break of the transparent laminated film 30, the stronger the durability of the transparent laminated film 30 against the load applied in the vicinity of the opening 33a.

(Example B2)
A transparent laminated film 30 was prepared in the same manner as in Example A2 except that a polyethylene terephthalate film having a thickness of 75 μm (manufactured by Toray Industries, Inc., Lumirror (registered trademark) 75U34 (trade name)) was prepared as the core layer 32. .. Further, in the same manner as in Example A1, the reflectance measurement test, the transmittance measurement test, the wearability evaluation test, the visibility evaluation test, the drop strength evaluation test, the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality. An evaluation test and a UV transmittance measurement test were conducted.

(Example B3)
As the core layer 32, a polyethylene terephthalate film having a thickness of 60 μm (Cosmo Shine (registered trademark) SRF TA060 (trade name) manufactured by Toyobo Co., Ltd.) was prepared, and the transparent laminated film 30 was prepared in the same manner as in Example A2. Made. Further, in the same manner as in Example A1, the reflectance measurement test, the transmittance measurement test, the wearability evaluation test, the visibility evaluation test, the drop strength evaluation test, the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality. An evaluation test and a UV transmittance measurement test were conducted.

(Example B4)
A transparent laminated film 30 was prepared in the same manner as in Example A2 except that a polyethylene terephthalate film having a thickness of 50 μm (Cosmo Shine (registered trademark) A4160 (trade name) manufactured by Toyobo Co., Ltd.) was prepared as the core layer 32. did. Further, in the same manner as in Example A1, the reflectance measurement test, the transmittance measurement test, the wearability evaluation test, the visibility evaluation test, the drop strength evaluation test, the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality. An evaluation test and a UV transmittance measurement test were conducted.

(Example B5)
A transparent laminated film 30 was prepared in the same manner as in Example A2 except that a polyethylene terephthalate film having a thickness of 100 μm (Cosmo Shine (registered trademark) A4160 (trade name) manufactured by Toyobo Co., Ltd.) was prepared as the core layer 32. did. Further, in the same manner as in Example A1, the reflectance measurement test, the transmittance measurement test, the wearability evaluation test, the visibility evaluation test, the drop strength evaluation test, the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality. An evaluation test and a UV transmittance measurement test were conducted.

(Example B6)
A transparent laminated film 30 was prepared in the same manner as in Example A2 except that a polyethylene terephthalate film having a thickness of 100 μm (Cosmo Shine (registered trademark) A4360 (trade name) manufactured by Toyobo Co., Ltd.) was prepared as the core layer 32. did. Further, in the same manner as in Example A1, the reflectance measurement test, the transmittance measurement test, the wearability evaluation test, the visibility evaluation test, the drop strength evaluation test, the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality. An evaluation test and a UV transmittance measurement test were conducted.

(Comparative Example 3)
The transmittance measurement test was carried out in the same manner as in Example A1 except that a commercially available transparent film (manufactured by Sharp Corporation, FG-10F 10M (trade name)) was used without producing the transparent laminated film 30. A transmittance measurement test, a wearability evaluation test, a visibility evaluation test, a drop strength evaluation test, a scratch resistance evaluation test, an alcohol resistance evaluation test, a splash prevention functionality evaluation test, and a UV transmittance measurement test were performed.

Here, when the cross section of the transparent film according to the comparative example was analyzed by SEM, it was found to have a three-layer structure in which a resin layer having a thickness of about 2 μm was laminated above and below a resin layer having a thickness of 187 μm. When the outermost layers of the upper and lower resin layers were observed at a further increased magnification, the upper and lower resin layers each had a large number of convex shapes having a substantially triangular cross section having a height of about 300 nm.

(Comparative Example 4)
The transmittance measurement test was carried out in the same manner as in Example A1 except that a commercially available transparent film (Hirax AirSheald pro (trade name) manufactured by Hiraoka Kogyo Co., Ltd.) was used without producing the transparent laminated film 30. A transmittance measurement test, a wearability evaluation test, a visibility evaluation test, a drop strength evaluation test, a scratch resistance evaluation test, an alcohol resistance evaluation test, a splash prevention functionality evaluation test, and a UV transmittance measurement test were performed.

Here, when the cross section of the transparent film according to the comparative example was analyzed by SEM, a resin layer having a thickness of 30 μm was laminated on one surface of the resin layer having a thickness of 186 μm, and the thickness was increased on the resin layer having a thickness of 30 μm. A resin layer having a thickness of 50 μm is laminated, a layer having a thickness of about 2 μm containing particles is laminated on the resin layer having a thickness of 50 μm, and a thickness of 30 μm is also formed on the other surface of the resin layer having a thickness of 186 μm. The resin layer, the resin layer having a thickness of 50 μm, and the layer having a thickness of about 2 μm were laminated in this order. The layer having a thickness of about 2 μm had a different appearance between a region having a thickness of 1.8 μm on the resin layer side having a thickness of 50 μm and a region having a thickness of 0.2 μm located on the surface side of the transparent film. ..

The results of Examples B1 to B6, Comparative Example 3 and Comparative Example 4 are shown in Tables 6 to 10. Table 6 shows the results of the reflectance measurement test. Table 7 shows the results of the transmittance measurement test. Table 8 shows the results of the wearability evaluation test, the visibility evaluation test, the drop intensity evaluation test, and the UV transmittance measurement test. Table 9 shows the results of the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality evaluation test. Table 10 shows the results of the pseudo-fracture test and the attachment / detachment test in Example B1.

The meaning of "○" in the column of the wearability evaluation test in Table 8 above is the same as the meaning of "○" in the column of the wearability evaluation test in Table 3 above. Further, "△△" in the column of the wearability evaluation test in Table 8 above shows the reflection of the wearer on the transparent laminated film or the like as compared with the case of "×" in the column of the wearability evaluation test in Table 3 above. Although it is difficult, it means that the result of the hearing was that the transparency was low and the impression of wearing the face shield continued, which hindered the work a little.

Further, the meaning of "○" in the column of the visibility evaluation test in Table 8 above is the same as the meaning of "○" in the column of the visibility evaluation test in Table 3 above. Further, "△△" in the column of the visibility evaluation test in Table 8 above can confirm the facial expression of the wearer as compared with the case of "×" in the column of the visibility evaluation test in Table 3 above, but it is slightly on the face. By feeling the whiteness, it means that the wearer's facial expression is a little hard to see.

Further, the meaning of "○" in the column of the contact evaluation test in Table 8 above is the same as the meaning of "○" in the column of the contact evaluation test in Table 3 above.

Further, the meaning of "○" in the drop strength test evaluation column of Table 8 above is the same as the meaning of "○" in the drop strength test evaluation column of Table 3 above.

Further, the meaning of "○" in the "fingerprint" column of the scratch resistance evaluation test in Table 9 above is the same as the meaning of "○" in the "fingerprint" column of the scratch resistance evaluation test in Table 4 above. Further, although the "△ ○" in the "fingerprint" column of the scratch resistance evaluation test in Table 9 is less than the "x" in the "fingerprint" column of the scratch resistance evaluation test in Table 4, the transparent lamination is performed. It means that some scratches have occurred on the film or the like.

Further, the meanings of "○", "△" and "×" in the "pencil" column of the scratch resistance evaluation test in Table 9 above are "○" in the "pencil" column of the scratch resistance evaluation test in Table 4 above. , "△" and "x" have the same meaning.

Further, the meanings of "○" and "×" in the column of the alcohol resistance evaluation test in Table 9 above are the same as the meanings of "○" and "×" in the column of the alcohol resistance evaluation test in Table 4 above. .. Further, "Δ" in the column of the alcohol resistance evaluation test in Table 9 above shows a smaller degree of discoloration of the transparent laminated film or the like than in the case of "x" in the column of the alcohol resistance evaluation test in Table 4 above. , Means that some discoloration has occurred.

Further, the meaning of "○" in the column of the splash prevention functionality evaluation test in Table 9 above is the same as the meaning of "○" in the column of the splash prevention functionality evaluation test in Table 4 above.

As a result, as shown in Table 1, in the transparent film according to Comparative Example 2, the reflectance of light having a wavelength of 550 nm was 8.7%. Further, as shown in Table 6, in the transparent film according to Comparative Example 4, the reflectance of light having a wavelength of 550 nm was 1.5%. On the other hand, in the transparent laminated film 30 according to Example B1, the reflectance of light having a wavelength of 550 nm was 0.1%. Further, in the transparent laminated film 30 according to Example B2, the reflectance of light having a wavelength of 550 nm was 0.4%. Further, in the transparent laminated film 30 according to Example B3, the reflectance of light having a wavelength of 550 nm was 0.3%. Further, in the transparent laminated film 30 according to Example B4, the reflectance of light having a wavelength of 550 nm was 0.8%. Further, in the transparent laminated film 30 according to Example B5, the reflectance of light having a wavelength of 550 nm was 0.6%. Further, in the transparent laminated film 30 according to Example B6, the reflectance of light having a wavelength of 550 nm was 0.4%. As described above, in the transparent laminated film 30 according to Examples B1 to B6, the reflectance of light having a wavelength of 550 nm could be reduced as compared with Comparative Example 2 and Comparative Example 4. Further, in the transparent laminated film 30 according to Examples B1 to B6, the reflectance of light having a wavelength of 450 nm is 0.3%, 0.6%, 0.6%, 1.1%, 0.9%, The reflectance of light having a wavelength of 650 nm was 0.7%, 1.0%, 0.7%, 1.2%, 1.1%, and 1.0%. As described above, in the transparent laminated film 30 according to Examples B1 to B6, the reflectance of light could be reduced when the wavelengths of light were 450 nm, 550 nm and 650 nm, respectively. Therefore, it was found that the transparent laminated film 30 according to Examples B1 to B6 can reduce the reflectance of light.

Further, as shown in Table 2, in the transparent film according to Comparative Example 2, the light transmittance was 90% or less in each of the cases where the wavelength of light was 450 nm, 550 nm and 650 nm. On the other hand, as shown in Table 7, in the transparent laminated film 30 according to Examples B1 to B6, the light transmittance is larger than 95% when the light wavelengths are 450 nm, 550 nm and 650 nm, respectively. It was. As described above, in the transparent laminated film 30 according to Examples B1 to B6, the light transmittance could be improved at each of the light wavelengths of 450 nm, 550 nm and 650 nm. In particular, even when the transparent laminated film 30 includes the front surface antireflection layer 40 constituting the front surface 301 and the back surface antireflection layer 50 constituting the back surface 302, the light transmittance is high as in Comparative Example 1. It was possible to obtain a transmittance close to that of a film. Therefore, it was found that the transparent laminated film 30 according to Examples B1 to B6 can improve the light transmittance.

Further, as shown in Table 3, in the wearability evaluation test, in the transparent film according to Comparative Example 2, the reflection of the wearer on the transparent film can be seen, which hinders the work and attaches the face shield. It was a hearing result that I had the impression that I was feeling tired. In addition, as shown in Table 8, the transparent film according to Comparative Example 4 was a hearing result that slightly hindered the work. On the other hand, as shown in Table 8, in Examples B1 to B6, the reflection of the wearer on the transparent laminated film 30 was not visible, and there was no impression that the face shield was worn. As described above, in the transparent laminated film 30 according to Examples B1 to B6, the reflection of the wearer on the transparent laminated film 30 can be reduced, and the wearer wearing the face shield 10 is prevented from feeling tired. did it.

Further, as shown in Table 3, in the visibility evaluation test, in the transparent film according to Comparative Example 2, the observer is reflected on the transparent film, so that the wearer's facial expression is expressed regardless of the viewing angle of the wearer. Confirmation was hindered. Further, as shown in Table 8, in the transparent film according to Comparative Example 4, the facial expression of the wearer became slightly difficult to see. On the other hand, in the transparent laminated film 30 according to Examples B1 to B6, the facial expression of the wearer could be clearly confirmed.

Further, as shown in Table 8, in the drop strength evaluation test, no deformation or scratches were confirmed on the transparent laminated film 30 of the face shield 10 in the face shield 10 according to Examples B1 to B6. As described above, even when the transparent laminated film 30 includes the front surface antireflection layer 40 constituting the front surface 301 and the back surface antireflection layer 50 constituting the back surface 302, as in Comparative Examples 1 to 4. It was found that the drop strength could be suppressed from being lowered as compared with the transparent film not provided with the front surface antireflection layer 40 and the back surface antireflection layer 50. It was

Further, as shown in Table 8, the transparent film according to Comparative Example 1 has a UV transmittance of 97.0%, and the transparent film according to Comparative Example 2 has a UV transmittance of 81.8%. The UV transmittance was 92.5% in the transparent film made by. On the other hand, in the transparent laminated film 30 according to Examples B1 to B6, the UV transmittance was 0.1%, respectively. As described above, in the transparent laminated film 30 according to Examples B1 to B6, the UV transmittance could be reduced. This means that the wearer H can be less likely to get sunburned even when the wearer H is outdoors in an environment exposed to direct sunlight.

Further, as shown in Table 4, in the scratch resistance evaluation test, in the transparent film according to Comparative Example 1, when the fingerprint was wiped off, the transparent film was scratched, and the transparent film became cloudy due to fine scratches. Was there. Further, as shown in Table 9, in the transparent film according to Comparative Example 3, when the fingerprint was wiped off, the transparent film was slightly scratched. On the other hand, as shown in Table 9, in the transparent laminated film 30 according to Examples B1 to B6, the fingerprints could be wiped off without causing scratches on the transparent laminated film 30. Further, as shown in Tables 4 and 9, in the transparent films according to Comparative Examples 1 and 4, when a pencil was rubbed against the transparent film, the transparent film had thin scratches. Further, in the transparent films according to Comparative Examples 2 and 3, when a pencil was rubbed against the transparent film, the transparent film was deeply scratched and the appearance of the transparent film was deteriorated. On the other hand, in the transparent laminated film 30 according to Examples B1 to B6, when the pencil was rubbed against the transparent laminated film 30, the transparent laminated film 30 was not scratched. As described above, in the transparent laminated film 30 according to Examples B1 to B3, it was possible to suppress the deterioration of the scratch resistance of the transparent laminated film 30.

Further, as shown in Table 3, in the alcohol resistance evaluation test, in the transparent film according to Comparative Example 1, the transparent film was discolored and the appearance was deteriorated. Further, as shown in Table 9, in the alcohol resistance evaluation test, the transparent film according to Comparative Example 3 and Comparative Example 4 had a slight discoloration. On the other hand, as shown in Table 9, in the transparent laminated film 30 according to Examples B1 to B6, the appearance of the transparent laminated film 30 did not change. As described above, in the transparent laminated film 30 according to Examples B1 to B6, it was possible to suppress the deterioration of the scratch alcohol resistance of the transparent laminated film 30.

Further, as shown in Table 9, in the splash prevention functionality evaluation test, even in the face shield 10 according to Examples B1 to B6, droplets of a specific size are scattered in front of the wearer H of the face shield 10. I was able to prevent it.

Further, as shown in Table 10, in the attachment / detachment test, the operation of disengaging the engaged portion 33 and the engaging portion 29 and the operation of engaging the engaged portion 33 and the engaging portion 29 are performed. Even if the cycle was repeated more than 100 times, no breakage occurred in the vicinity of the opening 33a of the shield portion 30A. Therefore, in the transparent laminated film 30 according to the embodiment B1, it is possible to prevent the shield portion 30A from being broken when the shield portion 30A is attached to the holding member 20 or the shield portion 30A is removed from the holding member 20. all right.

Further, as shown in Table 10, in the pseudo-fracture test, the stress at break was 32.5 N in the transparent laminated film 30 according to Example B1. Further, in the transparent laminated film 30 according to Example B1, the amount of movement at break was 10.3 mm. From the comparison between the result of the attachment / detachment test and the result of the pseudo-break test, if the stress at break of the transparent laminated film 30 constituting the shield portion 30A is 32.5 N or more, or the movement amount at break is 10.3 mm or more, the shield is shielded. It was found that the occurrence of breakage in the portion 30A can be suppressed. For example, if the stress at break of the transparent laminated film 30 constituting the shield portion 30A is larger than 20 N or the movement amount at break is larger than 9 mm, it is considered that the breakage of the shield portion 30A can be suppressed.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 9 to 11J. The second embodiment shown in FIGS. 9 to 11J is different from the first embodiment in that the shield portion 30A (transparent laminated film 30) mainly has the print layer 330. In FIGS. 9 to 11J, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the present embodiment, the shield portion 30A (transparent laminated film 30) has a print layer 330. As shown in FIGS. 9 and 10, the print layer 330 is provided at a position overlapping the cheek C of the wearer H in front view. As a result, it is possible to give the observer the impression that the character or the like displayed by the print layer 330 is directly printed on the face F. In this case, it is preferable that the print layer 330 is provided in a region where the length L of the shield portion 30A from the central axis CL is 100 mm or less in a state where the shield portion 30A is removed from the holding member 20. As a result, the print layer 330 can be overlapped with the cheek C of the wearer H while the wearer H is wearing the face shield 10. The print layer 330 may display, for example, information such as a pattern such as a character, a figure, or a mark, or characters. In the illustrated example, the print layer 330 displays a star, moon or flower pattern. Further, it is preferable that the print layer 330 is provided at a position that does not overlap with the eyes of the wearer H in the front view.

Transparent laminated film with protective film Next, the transparent laminated film 60 with a protective film according to the present embodiment will be described. 11A to 11J show an example of the layer structure of the transparent laminated film 60 with a protective film. As shown in FIGS. 11A to 11J, the transparent laminated film 60 with a protective film includes the transparent laminated film 30 according to the present embodiment, the surface protective film 61 that protects the surface 301 of the transparent laminated film 30, and the transparent laminated film 30. It is provided with a back surface protective film 62 that protects the back surface 302 of the above.

Transparent Laminated Film Next, the transparent laminated film 30 according to the present embodiment will be described. As described above, the transparent laminated film 30 may be used for the face shield 10 that protects the face F of the wearer H. As shown in FIGS. 11A to 11H, the transparent laminated film 30 has a front surface 301 and a back surface 302, and the core layer 32 and a part of the surface of the core layer 32 on the front surface 301 side or the back surface 302 side. It includes at least a print layer 330 that covers a part of the surface. Further, the transparent laminated film 30 is provided on one side of the core layer 32 and is provided on the front surface antireflection layer 40 constituting the front surface 301 and on the other side of the core layer 32 to form the back surface antireflection layer 302. It has a layer 50 and so on. Further, the transparent laminated film 30 has a first transparent adhesive layer 31a for adhering the front surface antireflection layer 40 and the core layer 32, and a second transparent adhesive layer 31b for adhering the core layer 32 and the back surface antireflection layer 50. Further may be provided.

Specifically, as shown in FIGS. 11A, 11C and 11E, the transparent laminated film 30 has a front surface antireflection layer 40, a first transparent adhesive layer 31a, and a printing layer from the front surface 301 to the back surface 302. The 330, the core layer 32, the second transparent adhesive layer 31b, and the back surface antireflection layer 50 are provided in this order. In this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

Further, as shown in FIGS. 11B, 11D and 11F, the transparent laminated film 30 includes a front surface antireflection layer 40, a first transparent adhesive layer 31a, and a core layer 32 from the front surface 301 to the back surface 302. The print layer 330, the second transparent adhesive layer 31b, and the back surface antireflection layer 50 are provided in this order. Also in this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

Further, as shown in FIG. 11G, the transparent laminated film 30 has a front surface antireflection layer 40, a printing layer 330, a first transparent adhesive layer 31a, a core layer 32, and a first layer from the front surface 301 to the back surface 302. The two transparent adhesive layers 31b and the back surface antireflection layer 50 are provided in this order. Also in this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

Further, as shown in FIG. 11H, the transparent laminated film 30 has a surface antireflection layer 40, a first transparent adhesive layer 31a, a core layer 32, and a second transparent adhesive layer 31b from the front surface 301 to the back surface 302. The print layer 330 and the back surface antireflection layer 50 are provided in this order. Also in this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

Further, as shown in FIGS. 11A to 11H, the surface antireflection layer 40 has a surface antireflection functional layer 41 arranged in order from the front surface 301 to the back surface 302, and a surface transparent base material layer 42. There is. Further, the surface antireflection function layer 41 includes a surface refraction layer 43 arranged in order from the front surface 301 to the back surface 302, and a surface hard coat layer 44. Here, as shown in FIGS. 11C to 11F, the surface refractive index layer 43 includes a surface low refractive index layer 45 arranged in order from the front surface 301 to the back surface 302, and a surface high refractive index layer 46. May be good. Further, as shown in FIGS. 11E and 11F, the front surface high refractive index layer 46 includes a first surface high refractive index layer 47 and a second surface high refractive index layer 48 arranged in order from the front surface 301 to the back surface 302. And may be included. In the examples shown in FIGS. 11G and 11H, the surface antireflection layer 40 has a surface antireflection functional layer 41 and a surface transparent base material layer 42, and the surface antireflection functional layer 41 is a surface refraction layer 43. And the surface hard coat layer 44. In this case, although not shown, in the surface antireflection layer 40, as shown in FIGS. 11C to 11F, the surface refractive index layer 43 may include a surface low refractive index layer 45 or the like.

Further, as shown in FIGS. 11A to 11H, the back surface antireflection layer 50 has a back surface antireflection function layer 51 arranged in order from the back surface 302 toward the front surface 301, and a back surface transparent base material layer 52. There is. Further, the back surface antireflection function layer 51 includes a back surface refraction layer 53 arranged in order from the back surface 302 toward the front surface 301, and a back surface hard coat layer 54. Here, as shown in FIGS. 11C to 11F, the back surface refractive index layer 53 includes a back surface low refractive index layer 55 arranged in order from the back surface 302 toward the front surface 301, and a back surface high refractive index layer 56. May be good. Further, as shown in FIGS. 11E and 11F, the back surface high refractive index layer 56 includes a first back surface high refractive index layer 57 arranged in order from the back surface 302 toward the front surface 301, and a second back surface high refractive index layer 58. And may be included. In the examples shown in FIGS. 11G and 11H, the back surface antireflection layer 50 has a back surface antireflection function layer 51 and a back surface transparent base material layer 52, and the back surface antireflection function layer 51 is a back surface refraction layer 53. And the back surface hard coat layer 54 are included. In this case, although not shown, in the back surface antireflection layer 50, as shown in FIGS. 11C to 11F, the back surface refractive index layer 53 may include a back surface low refractive index layer 55 or the like.

Further, as shown in FIGS. 11I and 11J, the transparent laminated film 30 does not have to include the core layer 32. Specifically, as shown in FIG. 11I, the transparent laminated film 30 has a front surface antireflection layer 40, a printing layer 330, a transparent adhesive layer 31, and a back surface antireflection layer 50 from the front surface 301 to the back surface 302. And may be provided in this order. Also in this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

Further, as shown in FIG. 11J, the transparent laminated film 30 has a front surface antireflection layer 40, a transparent adhesive layer 31, a printing layer 330, and a back surface antireflection layer 50 from the front surface 301 to the back surface 302. You may prepare in order. Also in this case, in the transparent laminated film 30, the surface antireflection layer 40 is exposed outward from the surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

In the examples shown in FIGS. 11I and 11J, the surface antireflection layer 40 has a surface antireflection functional layer 41 and a surface transparent base material layer 42, and the surface antireflection functional layer 41 is a surface refraction layer 43. And the surface hard coat layer 44. Further, the back surface antireflection layer 50 has a back surface antireflection function layer 51 and a back surface transparent base material layer 52, and the back surface antireflection function layer 51 includes a back surface refraction layer 53 and a back surface hard coat layer 54. .. In this case, although not shown, in the surface antireflection layer 40, as shown in FIGS. 11C to 11F, the surface refractive index layer 43 may include the surface low refractive index layer 45 and the like, and the back surface antireflection layer 50 may be included. In the back surface refractive index layer 53, the back surface low refractive index layer 55 and the like may be included.

The front surface antireflection layer 40 and the back surface antireflection layer 50 may have a structure other than the above-mentioned layer structure, or may be each made of a resin film. For example, a low-reflection film (manufactured by Sharp Corporation, FG-10MR1) may be used for each of the front surface antireflection layer 40 and the back surface antireflection layer 50. Further, the front surface antireflection layer 40 and the back surface antireflection layer 50 may have a structure in which irregularities are formed on the surface of a resin provided on a transparent substrate, which is generally known as moth eye. In this case, there may be a primer layer for improving the adhesion between the transparent base material and the resin surface. The resin having irregularities may be provided only on one side of the transparent base material, or may be provided on both sides.

Further, as shown in FIGS. 11A and 11B, when the front surface refractive index layer 43 and the back surface refractive index layer 53 are each composed of a single layer, the surface refractive index layer 43 is composed of only the surface low refractive index layer 45. The back surface refractive index layer 53 may be composed of only the back surface low refractive index layer 55.

Next, the print layer 330 will be described. The print layer 330 is a layer on which a pattern or the like is printed, and is a layer for improving the design of the transparent laminated film 30. The printing layer 330 contains one or more of ordinary ink vehicles as a main component, and if necessary, a plasticizer, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, a curing agent, a cross-linking agent, and the like. Arbitrarily add one or more of lubricants, antistatic agents, fillers, and other additives, further add colorants such as dyes and pigments, and thoroughly knead with solvents, diluents, etc. An ink composition obtained by adjusting the ink composition can be used. Examples of such an ink vehicle include linseed oil, cutting oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin-modified resin, shelac, alkyd resin, phenolic resin, maleic acid resin, natural resin, and hydrocarbon. Hydrogen resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, acrylic or methacrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, One or more of aminoalkyd resins, nitrocellulose, ethylcellulose, rubber chloride, cyclized rubber, etc. can be used in combination. In addition to gravure printing, the printing method may be letterpress printing, screen printing, transfer printing, flexographic printing, inkjet printing or other printing methods.

The transparent laminated film 30 described above has a visual reflectance Y value of 0.0% or more and 2.0% or less, and 0.1% or more and 1.0% or less in a region where the print layer 330 is not provided. Is preferable. In the region where the print layer 330 is not provided, the visible reflectance Y value is 0.0% or more and 2.0% or less, so that the region where the print layer 330 is not provided in the transparent laminated film 30 is covered. It can be made inconspicuous, and the print layer 330 can be made conspicuous. In this way, by making the area where the print layer 330 is not provided conspicuous, the observer who visually recognizes the print layer 330 has the impression that the character or the like formed by the print layer 330 is floating in the air. Can be given. Further, depending on the angle at which the observer visually recognizes the print layer 330, it is possible to give the observer the impression that the character or the like is printed directly on the face F. The face shield 10 according to the present embodiment can display a design different from the conventional one. Therefore, the design of the face shield can be improved.

Here, the visual reflectance Y value can be measured by the following method. First, the front surface 301 or the back surface 302 of the transparent laminated film 30 is irradiated with light so that the incident angle is 5 °. Then, the visual reflectance Y value can be measured based on the specularly reflected light of the incident light. Here, in the present specification, the visual reflectance Y value means the visual reflectance Y value of the CIE 1931 standard color system.

Further, the transparent laminated film 30 has a reflectance of 2% or less of light having a wavelength of 550 nm and a total light transmittance (JISK7361-1: 1997) of 90% or more in a region where the print layer 330 is not provided. Is preferable. Further, it is more preferable that the transparent laminated film 30 has a total light transmittance of 92% or more. Further, the transparent laminated film 30 preferably has a haze (JISK7136: 2000) of 3.0% or less, more preferably 2.5% or less, and further preferably 2.0% or less.

The transparent laminated film 30 described above preferably has a transmittance of 1.0% or less in the ultraviolet region having a wavelength of 380 nm or less in a region where the print layer 330 is not provided. As a result, even when the wearer H wearing the face shield 10 works in an environment exposed to direct sunlight, it is possible to prevent the wearer H from getting sunburned.

In the above-mentioned transparent laminated film 30, the arithmetic average roughness Ra (JIS B0601: 1994) of the front surface 301 and the back surface 302 is preferably 10 nm or less, and more preferably 1 nm or more and 8 nm or less. The ten-point average roughness Rz (JIS B0601: 1994) of the front surface 301 and the back surface 302 is preferably 160 nm or less, and more preferably 50 nm or more and 155 nm or less. When Ra and Rz are in the above range, it has smoothness and scratch resistance is improved.

In the present embodiment, when the transparent laminated film 30 is manufactured, the core layer 32 provided with the print layer 330 is manufactured. At this time, for example, first, a polyethylene terephthalate film is prepared as the core layer 32. Next, the print layer 330 is formed on the core layer 32 by, for example, gravure printing.

Then, the surface antireflection layer 40 and the core layer 32 are adhered to each other via the first transparent adhesive layer 31a, and the core layer 32 and the back surface antireflection layer 50 are adhered to each other via the second transparent adhesive layer 31b. The transparent laminated film 30 is manufactured. In this way, the transparent laminated film 30 can be produced.

As described above, according to the present embodiment, the transparent laminated film 30 includes at least a core layer 32 and a print layer 330 provided on one surface of the core layer 32 and covering a part of the core layer 32. ing. Further, in the region where the print layer 330 is not provided, the visual reflectance Y value is 0.0% or more and 2.0% or less. As a result, in the transparent laminated film 30, the area where the print layer 330 is not provided can be made inconspicuous, and the print layer 330 can be made inconspicuous. In this way, by making the area where the print layer 330 is not provided conspicuous, the observer who visually recognizes the print layer 330 has the impression that the character or the like formed by the print layer 330 is floating in the air. Can be given. Further, in the region where the print layer 330 is not provided, when the visual reflectance Y value is 0.0% or more and 2.0% or less, the print layer 330 becomes difficult to see due to the reflected light. It can be suppressed. Further, depending on the angle at which the observer visually recognizes the print layer 330, it is possible to give the observer the impression that the character or the like is printed directly on the face F. The face shield 10 according to the present embodiment can display a design different from the conventional one. Therefore, the design of the face shield 10 can be improved. Further, since the print layer 330 can be made to stand out, characters and symbol information can be clearly displayed on the face shield 10.

Further, according to the present embodiment, the transparent laminated film 30 has a reflectance of light having a wavelength of 550 nm of 2% or less and a total light transmittance of 90 in a region where the print layer 330 is not provided. % Or more. As a result, the area where the print layer 330 is not provided can be made less noticeable. In addition, the visibility of the face F of the wearer H can be improved.

Further, according to the present embodiment, the transmittance in the ultraviolet region having a wavelength of 380 nm or less is 1.0% or less in the region where the print layer 330 is not provided. As a result, even when the wearer H wearing the face shield 10 works in an environment exposed to direct sunlight, it is possible to prevent the wearer H from getting sunburned.

Further, according to the present embodiment, the core layer 32 contains polyethylene terephthalate. Thereby, the transparency of the core layer 32 can be improved.

Further, according to the present embodiment, the transparent laminated film 30 is provided on one side of the core layer 32, and is provided on the surface antireflection layer 40 constituting the surface 301 and on the other side of the core layer 32. Further, a back surface antireflection layer 50 constituting the back surface 302 is provided. As a result, it is possible to suppress the reflection of the light incident from the front surface 301 side of the transparent laminated film 30 and the reflection of the light incident from the back surface 302 side of the transparent laminated film 30. That is, it is possible to improve the visibility when the transparent laminated film 30 is viewed from the front surface 301 side and the visibility when the transparent laminated film 30 is viewed from the back surface 302 side. Thereby, for example, when the wearer H wearing the face shield 10 is visually recognized, the visibility of the face F of the wearer H can be improved. Therefore, the visibility of the mouth of the wearer H can be improved, and smooth communication between the wearer H and others can be achieved. Further, for example, the wearer H wearing the face shield 10 provided with the shield portion 30A made of the transparent laminated film 30 is prevented from feeling uncomfortable or tired due to the light reflected on the back surface 302 of the transparent laminated film 30. can do.

Further, according to the present embodiment, the transparent laminated film 30 is used for the face shield 10 that protects the face F of the wearer H. As a result, it is possible to easily obtain a face shield 10 capable of improving the visibility of the face F of the wearer H and suppressing the wearer H from feeling uncomfortable or tired. Further, as described above, the face shield 10 according to the present embodiment can display a design different from the conventional one, so that the design of the face shield can be improved.

Although the example in which the holding member 20 of the face shield 10 is a so-called eyeglass frame type in the above-described embodiment has been described, the present invention is not limited to this. For example, the holding member 20 may be a so-called hair band type, a headband type, or the like. In this case, as shown in FIG. 12, the holding member 20 may have a band 25 that covers the head of the wearer H in a circumferential shape. The material of the band 25 may be an elastic body such as rubber as well as resin and cardboard. Further, the holding member 20 may have a protective member 26 attached to the band 25 and in contact with the forehead of the wearer H. The protective member 26 preferably contains a cushioning material such as a sponge. As a result, it is possible to prevent the wearer H wearing the face shield 10 from feeling uncomfortable. In the illustrated example, the band 25 covers only a part of the head of the wearer H, but the band 25 may cover the entire circumference of the head of the wearer H.

Further, in the above-described embodiment, an example in which the shield portion 30A covers the entire face F of the wearer H has been described, but the present invention is not limited to this. For example, as shown in FIG. 13, the shield portion 30A (transparent laminated film 30) may cover only a part of the face F of the wearer H. In this case, the holding member 20 is connected to the chin pad 27 that abuts on the chin J of the wearer H and the chin pad 27, and is hooked on the ear E of the wearer H. It may have only one (shown) and. Of these, the material of the jaw pad 27 may be resin, cardboard, or the like. The hook portion 28 may be a string-shaped member, and the material of the hook portion 28 may be an elastic body such as rubber. In this modification, the shield portion 30A covers the mouth M and the nose N of the wearer H. As a result, it is possible to suppress the adhesion of saliva and other droplets due to sneezing and coughing of the wearer H to the face of another person, and it is possible to improve the visibility of the mouth of the wearer H. You can communicate smoothly with others. The shield portion 30A may cover only the vicinity of the mouth M without covering the nose N of the wearer H.

Further, in the above-described embodiment, an example in which the transparent laminated film 30 is used for the face shield 10 that protects the face F of the wearer H has been described, but the present invention is not limited to this. For example, as shown in FIG. 14, the transparent laminated film 30 may be attached to the pair of temple portions 21 as an accessory. In this case, as shown in FIGS. 14 and 15, a pair of through holes 35 are formed in the transparent laminated film 30, and the temple portion 21 is inserted into the through holes 35 so that the transparent laminated film 30 becomes the temple portion 21. It may be attached to. Further, in this modification, the width (horizontal distance in FIG. 15) of the transparent laminated film 30 may be about 50 mm, and the length (vertical distance in FIG. 15) may be about 200 mm.

(Example C1)
First, the transparent laminated film 30 shown in FIG. 11A was produced. At this time, first, the surface antireflection layer 40 was prepared. When producing the surface antireflection layer 40, first, a triacetyl cellulose film (refractive index 1.49) having a thickness of 60 μm was prepared as the surface transparent base material layer 42. Next, a coating liquid for forming a hard coat layer having the following formulation was applied onto the triacetyl cellulose film, dried and irradiated with ultraviolet rays to form a surface hard coat layer 44 having a thickness of 10 μm, a refractive index of 1.54 and a pencil hardness of 2H. .. Next, a coating liquid for forming a high refractive index layer of the following formulation was applied onto the surface hard coat layer 44, dried and irradiated with ultraviolet rays to form a surface high refractive index layer 46 having a thickness of 150 nm and a refractive index of 1.63. Next, a coating liquid for forming a low refractive index layer of the following formulation is applied onto the surface high refractive index layer 46, dried and irradiated with ultraviolet rays to form a surface low refractive index layer 45 having a thickness of 100 nm and a refractive index of 1.30. , A surface antireflection layer 40 was obtained.

Further, in parallel with the production of the front surface antireflection layer 40 and the back surface antireflection layer 50, a polyethylene terephthalate film having a thickness of 12 μm (refractive index 1.58) on which the print layer 330 is formed as the print layer 330 and the core layer 32. -1.70) was prepared.

Next, the surface antireflection layer 40 and the core layer 32 on which the printing layer 330 is formed are adhered to each other via the first transparent adhesive layer 31a (Panaclean series PD-S1, manufactured by Panac Co., Ltd., thickness 25 μm). , The core layer 32 on which the printing layer 330 is formed and the back surface antireflection layer 50 are bonded to each other via a second transparent adhesive layer 31b (Panaclean series PD-S1, thickness 25 μm manufactured by Panac Co., Ltd.) to be transparently laminated. A film 30 was produced. The layer structure of the obtained transparent laminated film 30 is as follows.
Low bending / High bending / Hard coat / TAC / Stickiness / Printing / PET / Stickiness / TAC / Hard coat / High bending / Low bending In the above, "low bending" refers to the front surface low refractive index layer or the back surface low refractive index layer. Means (same below). Further, "high bending" means a front surface high refractive index layer or a back surface high refractive index layer (the same shall apply hereinafter). Further, "hard coat" means a front surface hard coat layer or a back surface hard coat layer (the same shall apply hereinafter). Further, "TAC" means a triacetyl cellulose film (the same applies hereinafter). In addition, "adhesive" means a transparent adhesive layer (the same applies hereinafter). Further, "printing" means a printing layer (the same applies hereinafter). Further, "PET" means a polyethylene terephthalate film (same below).

At this time, first, a sample having a size of 20 mm × 20 mm was cut out from the region of the obtained transparent laminated film 30 in which the print layer 330 was not provided. Next, the surface of the sample was irradiated with light so that the incident angle was 85 ° (the surface parallel to the film surface was 0 °; the same applies hereinafter). Then, the visual reflectance Y value was obtained by calculating from the reflection spectrum using a spectrophotometer (manufactured by JASCO Corporation, V-7100). At this time, the wavelengths of the light were set to 450 nm, 550 nm and 650 nm, and the surface of the sample was irradiated with light for each of the wavelengths of light. Then, the reflection spectrum of light was measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation), and the reflectance of light at each wavelength was calculated.

(2) Design evaluation test In addition, a design evaluation test of the face shield 10 was conducted.

At this time, first, the face shield 10 shown in FIG. 9 was produced using the obtained transparent laminated film 30. Next, the print layer 330 of the face shield 10 was observed, and the design of the face shield was evaluated.

(3) Transmittance measurement test In addition, a transmittance measurement test was carried out on the transparent laminated film 30.

At this time, first, a sample having a size of 20 mm × 20 mm was cut out from the obtained transparent laminated film 30. Next, the surface of the sample was irradiated with light so that the incident angle was 85 °. At this time, the wavelengths of the light were set to 450 nm, 550 nm and 650 nm, and the surface of the sample was irradiated with the light for each wavelength. Then, the transmittance of light was measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation), and the transmittance of light at each wavelength was calculated.

(4) Wearability evaluation test In addition, a wearability evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 9 was produced using the obtained transparent laminated film 30. Next, five experimenters were randomly selected from men and women over the age of 22. Then, five selected experimenters performed office work with the face shield 10 attached. After that, we interviewed five experimenters who had done the office work for one hour to see if they had the impression that they were wearing the face shield 10.

(5) Visibility evaluation test In addition, a visibility evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 9 was produced using the obtained transparent laminated film 30. Next, five experimenters were randomly selected from men and women over the age of 22. Then, the visibility of the facial expressions of the five experimenters wearing the face shield 10 was confirmed. At this time, the facial expression of the experimenter was observed from a distance of about 1 m to 2 m from the experimenter in a general indoor environment illuminated by a fluorescent lamp. In addition, the observer observed the facial expression of the experimenter while moving about 20 ° to the left and right around the surface 301 of the face shield 10 from the state facing the experimenter.

(6) Drop strength evaluation test In addition, a drop strength evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 9 was produced using the obtained transparent laminated film 30. Next, a drop test was performed on the face shield 10. At this time, first, one temple portion 21 of the holding member 20 of the face shield 10 was picked, and the face shield 10 was lifted so that the temple portion 21 had a height of 170 mm from the ground. After that, the face shield 10 was freely dropped on the ground. In this way, a drop test was performed on the face shield 10. Then, such a drop test was repeated 10 times, and it was confirmed whether or not there was a change in the appearance of the face shield 10.

(7) Scratch resistance evaluation test In addition, a scratch resistance evaluation test of the transparent laminated film 30 was carried out.

(8) Alcohol resistance evaluation test In addition, an alcohol resistance evaluation test of the transparent laminated film 30 was carried out.

(9) Splash Prevention Functionality Evaluation Test In addition, a splash prevention functionality evaluation test of the transparent laminated film 30 was carried out.

(10) UV Transmittance Measurement Test In addition, a UV transmittance measurement test of the transparent laminated film 30 was carried out.

(11) Antifouling property evaluation test In addition, an antifouling property evaluation test of the transparent laminated film 30 was carried out.

At this time, first, a line was drawn on the surface 301 of the obtained transparent laminated film 30 with an oil-based marker, and immediately after that, it was wiped off with Kimwipe S-200 (trade name). At this time, the fingerprints were wiped off with the Kimwipe S-200 in a dry state without impregnating the Kimwipe S-200 with a chemical such as alcohol.

(Example C2)
Using a commercially available low-reflection film (FG-10MR1 manufactured by Sharp Co., Ltd.), the low-reflection film and the core layer 32 on which the printing layer 330 is formed are formed on the first transparent adhesive layer 31a (Panac Co., Ltd., Pana). The second transparent adhesive layer 31b (Panaclean, manufactured by Panac Co., Ltd.) is attached to the surface of the core layer 32 to which the above-mentioned low-reflection film is not adhered. The transmittance measurement test and design were the same as in Example C1, except that a commercially available low-reflection film (manufactured by Sharp Co., Ltd., FG-10MR1) was adhered via the series PD-S1, thickness 25 μm). Evaluation test, transmittance measurement test, wearability evaluation test, visibility evaluation test, drop strength evaluation test, scratch resistance evaluation test, alcohol resistance evaluation test, splash prevention functionality evaluation test, UV transmittance measurement test and stain resistance An evaluation test was conducted.

Here, when the cross section of the low reflection film according to Example C2 was analyzed by SEM, it was found that the resin layer having a thickness of 187 μm was 2 to 3 μm above and below the resin layer having a thickness of 187 μm, and the resin layer having irregularities on the surface side was laminated 3 It was a layered structure.

(Comparative Example C1)
A commercially available transparent film (YF-800L (trade name) manufactured by Yamamoto Optical Co., Ltd.) and a transparent adhesive layer (Panaclean series PD-S1, 25 μm thick) on which the printing layer is formed are used. Reflectance measurement test, design evaluation test, transmittance measurement test, wearability evaluation test, visibility evaluation test, drop strength evaluation test, scratch resistance in the same manner as in Example C1 except that they were adhered to each other through. An evaluation test, an alcohol resistance evaluation test, a splash prevention functionality evaluation test, a UV transmittance measurement test, and an antifouling property evaluation test were conducted.

Here, when the cross section of the transparent laminated film according to Comparative Example C1 was analyzed by SEM, it was found to have a three-layer structure in which a resin layer having a thickness of 3 μm was laminated above and below a resin layer having a thickness of 150 μm.

(Comparative Example C2)
A commercially available low-reflection film (manufactured by Sharp Co., Ltd., FG-10MR1) and a core layer on which a printed layer is formed are bonded to each other via a transparent adhesive layer (manufactured by Panac Co., Ltd., Panaclean series PD-S1, thickness 25 μm). Reflectance measurement test, design evaluation test, transmittance measurement test, wearability evaluation test, visibility evaluation test, drop strength evaluation test, scratch resistance evaluation test, resistance An alcohol property evaluation test, a splash prevention functionality evaluation test, a UV transmittance measurement test, and an antifouling property evaluation test were performed.

The above results are shown in Tables 11 to 15. Table 11 shows the results of the reflectance measurement test and the design evaluation test. Table 12 shows the results of the transmittance measurement test. Table 13 shows the results of the wearability evaluation test, the visibility evaluation test, and the drop strength evaluation test. Table 14 shows the results of the scratch resistance evaluation test, the alcohol resistance evaluation test, and the splash prevention functionality evaluation test. Furthermore, Table 15 shows the results of the UV transmittance measurement test and the antifouling property evaluation test.

In the design column of Table 11 above, "○" means that in the transparent laminated film 30 of the face shield 10, the area where the print layer 330 is not provided is not conspicuous, and the print layer 330 is conspicuous. do. “Δ” means that the area where the print layer is not provided becomes conspicuous depending on the viewing angle of the face shield and the surrounding lighting environment, and the print layer is inconspicuous. Further, "x" means that in the transparent laminated film of the face shield, the area where the print layer is not provided is conspicuous, and the print layer is not conspicuous.

In the column of the wearability evaluation test in Table 13 above, "○" is a hearing result that the wearer cannot be seen on the transparent laminated film 30 and there is no impression that the face shield is worn. means. “△” indicates that the wearer is not always reflected on the transparent laminated film due to factors such as the surrounding lighting environment or the orientation of the wearer's face, giving the impression that the wearer is wearing a face shield. It means that it was a result of hearing that it was sometimes held and felt tired although it was weak. In addition, "x" is a hearing result that the wearer can be seen on the transparent laminated film, which hinders the work and gives the impression that the face shield is worn, which makes the person feel tired. It means that.

Further, in the column of the visibility evaluation test in Table 13 above, "○" means that the facial expression of the wearer could be clearly confirmed. Further, "Δ" means that the observer is reflected on the transparent laminated film depending on the viewing angle of the wearer, which hinders the confirmation of the wearer's facial expression. Further, "x" means that the observer is reflected on the transparent laminated film, so that the confirmation of the facial expression of the wearer is hindered regardless of the angle at which the wearer is visually recognized.

Furthermore, in the drop strength evaluation test column of Table 13 above, "○" means that no deformation or scratches were confirmed on the transparent laminated film of the face shield.

In the "fingerprint" column of the scratch resistance evaluation test in Table 14, "○" means that the fingerprint could be wiped off without causing scratches on the transparent laminated film. Further, "x" means that the transparent laminated film was scratched when the fingerprint was wiped off, and the transparent laminated film had an appearance of becoming cloudy due to fine scratches.

Further, in the "pencil" column of the scratch resistance evaluation test in Table 14 above, "○" means that the transparent laminated film was not scratched. Further, "Δ" means that a thin scratch has occurred on the transparent laminated film. Further, "x" means that the transparent laminated film is deeply scratched and the appearance of the transparent laminated film is deteriorated.

Further, in the column of the alcohol resistance evaluation test in Table 14 above, "○" means that the appearance of the transparent laminated film did not change. Further, "x" means that the transparent laminated film is discolored and the appearance is deteriorated.

Further, in the column of the splash prevention functionality evaluation test in Table 14 above, "○" means that the colored ink was not adhered to the paper. Further, "x" means that colored ink was observed on the paper.

In the column of the antifouling property evaluation test in Table 15 above, "○" means that the line disappeared after wiping. Further, "x" means that the oil-based ink could not be wiped off and the line remained clearly.

As a result, as shown in Table 11, the transparent laminated film according to Comparative Example C1 has a visual reflectance Y value of 8.6%, and the transparent laminated film according to Comparative Example C2 has a visual reflectance Y value of 3. It was 0.7%. On the other hand, in the transparent laminated film 30 according to Example C1, the visual reflectance Y value is 0.6%, and in the transparent laminated film 30 according to Example C2, the visual reflectance Y value is 0.7%. Met. As described above, in the transparent laminated film 30 according to Example C1 and Example C2, the visual reflectance Y value could be reduced. Therefore, it was found that in the transparent laminated film 30, the area where the print layer 330 is not provided can be made inconspicuous.

Further, as shown in Table 11, the transparent laminated film according to Comparative Example C1 has a reflectance of 8.6% for light having a wavelength of 550 nm, and the transparent laminated film according to Comparative Example C2 reflects light having a wavelength of 550 nm. The rate was 3.6%. On the other hand, in the transparent laminated film 30 according to Example C1, the reflectance of light having a wavelength of 550 nm is 0.6%, and in the transparent laminated film 30 according to Example C2, the reflectance of light having a wavelength of 550 nm is high. It was 0.7%. As described above, in the transparent laminated film 30 according to Example C1 and Example C2, the reflectance of light having a wavelength of 550 nm could be reduced. Further, in the transparent laminated film 30 according to Example C1 and Example C2, the reflectances of light having a wavelength of 450 nm are 0.8% and 0.7%, respectively, and the reflectances of light having a wavelength of 650 nm are respectively. It was 1.0% and 0.6%. As described above, in the transparent laminated film 30 according to Example C1 and Example C2, the reflectance of light could be reduced when the wavelength of light was 450 nm, 550 nm and 650 nm, respectively. Therefore, it was found that the transparent laminated film 30 according to the present embodiment can reduce the reflectance of light.

Further, as shown in Table 11, in the face shield according to Comparative Example C1, the area where the print layer was not provided was conspicuous, and the print layer was not conspicuous. Further, in the face shield according to Comparative Example C1, the area where the print layer is not provided becomes conspicuous depending on the angle at which the face shield is visually recognized and the surrounding lighting environment, and the print layer is inconspicuous. On the other hand, in the face shield according to Example C1 and Example C2, the area where the print layer 330 is not provided is not conspicuous, and the print layer 330 can be conspicuous. As described above, it was found that the face shield 10 according to Examples C1 and C2 can display a design different from the conventional one, and can improve the design of the face shield.

Further, as shown in Table 12, in the transparent laminated film according to Comparative Example C1 and Comparative Example C2, the light transmittance is 87.7% and 93.7% when the wavelength of light is 450 nm, and the light transmittance is 87.7%. When the wavelength was 550 nm, the light transmittance was 89.2% and 95.4%, and when the wavelength of light was 650 nm, the light transmittance was 90.8% and 96.7%. .. On the other hand, in the transparent laminated film 30 according to Example C1 and Example C2, when the wavelength of light is 450 nm, the transmittance of light is 94.7% and 96.4%, and the wavelength of light is 550 nm. In the case of, the light transmittance was 97.3% and 98.3%, and when the wavelength of the light was 650 nm, the light transmittance was 97.8% and 99.6%. Therefore, it was found that the transparent laminated film 30 according to the present embodiment can improve the light transmittance.

Further, as shown in Table 13, in the wearability evaluation test, in the transparent laminated film according to Comparative Example C1, the reflection of the wearer on the transparent laminated film can be seen, which hinders the work and causes the face shield to be used. It was a hearing result that I had the impression that I was wearing it and felt tired. Further, in the transparent laminated film according to Comparative Example C2, the wearer's reflection on the transparent laminated film or the like is not always visible due to factors such as the surrounding lighting environment or the orientation of the wearer's face, and the face shield is used. It was a hearing result that I sometimes had the impression that I was wearing the sword, and I felt a feeling of fatigue although it was weak. On the other hand, in Examples C1 and C2, it was a hearing result that the image of the wearer on the transparent laminated film 30 was not visible and there was no impression that the face shield was worn. As described above, in the transparent laminated film 30 according to the first and second embodiments, the reflection of the wearer on the transparent laminated film 30 can be reduced, and the wearer wearing the face shield 10 feels tired. I was able to suppress that.

Further, as shown in Table 13, in the visibility evaluation test, in the transparent laminated film according to Comparative Example C1, the observer is reflected in the transparent laminated film, so that the wearer can see the wearer regardless of the viewing angle. Confirmation of facial expression was hindered. Further, in the transparent laminated film according to Comparative Example C2, the observer is reflected on the transparent laminated film or the like depending on the angle at which the wearer is visually recognized, which hinders the confirmation of the wearer's facial expression. On the other hand, in the transparent laminated film 30 according to Example C1 and Example C2, the facial expression of the wearer could be clearly confirmed.

Further, as shown in Table 13, in the drop strength evaluation test, no deformation or scratches were confirmed on the transparent laminated film 30 of the face shield 10 in the face shield 10 according to Example C1 and Example C2. As described above, it was found that the transparent laminated film or the like according to the present embodiment can suppress the drop strength from being lowered as compared with the conventional transparent laminated film.

Further, as shown in Table 14, in the scratch resistance evaluation test, in the transparent laminated film 30 according to Example C1, fingerprints could be wiped off without causing scratches on the transparent laminated film 30. Further, in the transparent laminated film 30 according to Example C1, when the pencil was rubbed against the transparent laminated film 30, the transparent laminated film 30 was not scratched. As described above, in the transparent laminated film 30 according to Example C1, it was possible to suppress the deterioration of the scratch resistance of the transparent laminated film 30.

Further, as shown in Table 14, in the alcohol resistance evaluation test, the transparent laminated film 30 according to Example C1 did not change the appearance of the transparent laminated film 30. As described above, in the transparent laminated film 30 according to Example C1, it was possible to suppress the deterioration of the scratch alcohol resistance of the transparent laminated film 30.

Further, as shown in Table 14, in the splash prevention functionality evaluation test, even in the face shield 10 according to Examples C1 and C2, droplets of a specific size are scattered in front of the wearer H of the face shield 10. I was able to prevent it.

Further, as shown in Table 15, the transparent laminated film 30 according to Example C1 had a UV transmittance of 0.1%. As described above, in the transparent laminated film 30 according to Example C1, the UV transmittance could be reduced. This means that the wearer H can be less likely to get sunburned even when the wearer H is outdoors in an environment exposed to direct sunlight.

Further, as shown in Table 15, in the antifouling property evaluation test, the oil-based ink could be wiped off with the transparent laminated film 30 according to Example C1, and the line disappeared after wiping. As described above, in the transparent laminated film 30 according to Example C1, the oil-based ink that is difficult to remove could be easily removed. As a result, even if dirt adheres to the face shield 10, the dirt can be easily wiped off from the face shield 10, and the face shield 10 can be easily restored to a clean state.

(Third embodiment)
<First implementation mode>
Next, the first embodiment of the third embodiment will be described with reference to FIGS. 16 to 23. The first embodiment of the third embodiment shown in FIGS. 16 to 23 is different from the first embodiment in that the first curved surface 77a is mainly formed on the shield portion 30A. .. In FIGS. 16 to 23, the same parts as those in the first embodiment or the same parts as those in the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 16 to 18, the holding member 200 according to the present embodiment is equipped with a pair of temple portions 210 including an ear hook portion 220 attached to the ear E of the wearer H and a pair of temple portions 210. It has a connecting portion 230 (see FIGS. 16 and 18) that connects to each other from the rear of the person H.

Of these, the ear hook portion 220 of the temple portion 210 extends in a substantially arc shape. The face shield 10 is attached to the wearer H by the ear hook portion 220 coming into contact with the wearer's ear E from above. In this implementation mode, only the ear hook portion 220 of the face shield 10 can come into contact with the wearer H.

Further, as shown in FIGS. 16 to 18, the temple portion 210 of the holding member 200 is provided in front of the ear hook portion 220 and includes a pair of mounting portions 250 for holding the shield portion 30A. The mounting portion 250 is inserted into an opening 80, which will be described later, formed in the transparent laminated film 30.

In this implementation mode, the mounting portion 250 may be formed by bending the tip of a rod-shaped member described later. The mounting portion 250 includes a first protruding portion 260 and a second protruding portion 270 located in front of the first protruding portion 260. The first protruding portion 260 is formed by the tip of a rod-shaped member, and protrudes in the horizontal direction toward the side away from the face F of the wearer H. As a result, it is possible to prevent the first protruding portion 260 from coming into contact with the face F of the wearer H. As described above, the first protruding portion 260 is formed by the tip of the rod-shaped member, and the height of the first protruding portion 260 is equal to the diameter of the rod-shaped member.

The second protruding portion 270 is configured by folding a rod-shaped member, and protrudes along the horizontal direction toward the side away from the face F of the wearer H. This makes it possible to prevent the second protrusion 270 from coming into contact with the face F of the wearer H. As described above, the second protruding portion 270 is configured by folding the rod-shaped member, and the height of the second protruding portion 270 is at least twice the diameter of the rod-shaped member.

The holding member 200 holds the shield portion 30A so as to be movable in the vertical direction. In this case, a play is provided between the first protrusion 260 and the first opening 81 described later, and a play is provided between the second protrusion 270 and the second opening 82 described later. There is. As a result, even when the shield portion 30A comes into contact with the surrounding structure, the shield portion 30A moves with respect to the holding member 200, so that an impact is applied from the face shield 10 to the wearer H. In addition, it is possible to prevent the face shield 10 from coming off the wearer H. The play between the second protrusion 270 and the second opening 82 described later may be larger than the play between the first protrusion 260 and the first opening 81 described later. Further, there may be almost no play between the first protruding portion 260 and the first opening 81 described later. Even in this case, the shield portion 30A can move in the vertical direction so as to rotate about the central axis of the first protrusion 260.

Further, a weight 240 for adjusting the inclination of the temple portion 210 with respect to the horizontal direction is attached to the connecting portion 230. As a result, it is possible to prevent the shield portion 30A from coming into contact with the face F of the wearer H. As will be described later, the holding member 200 according to the present embodiment is made of a metal rod-shaped member, and as described above, the holding member 200 according to the present embodiment allows only the ear hook portion 220 to come into contact with the wearer H. It is configured in. Even in the holding member 200 having such a simple configuration, the shield portion 30A is attached to the face of the wearer H by attaching the weight 240 for adjusting the inclination of the temple portion 210 with respect to the horizontal direction to the connecting portion 230. It is possible to suppress contact with F. Therefore, the face shield 10 having the desired performance can be manufactured at low cost.

In this implementation mode, the temple portion 210 and the connecting portion 230 are integrally molded. Further, the holding member 200 is made of a metal rod-shaped member. As a result, even if the face shield 10 is dropped, it is possible to prevent the holding member 200 from being damaged. In the illustrated example, the bar-shaped member is composed of a round bar. The diameter of the round bar may be, for example, 1 mm or more and 5 mm or less, and preferably 2 mm or more and 3 mm or less. When the diameter of the round bar is 2 mm or more, it is possible to suppress a decrease in the strength of the holding member 200. Further, when the diameter of the round bar is 3 mm or less, the weight of the holding member 200 can be reduced.

Further, the metal constituting the rod-shaped member is preferably aluminum. Thereby, the holding member 200 can be easily formed. In addition, the weight of the holding member 200 can be reduced. Further, the metal may be stainless steel, titanium, or the like. The holding member 200 may be made of a resin rod-shaped member. As a result, the weight of the holding member 200 can be further reduced. Further, since the holding member 200 is made of resin, it is possible to prevent the holding member 200 from having a bending habit when the holding member 200 is bent. In this case, the resin material used for the holding member 200 can be selected from resin materials used for general purposes. For example, the resin may consist of a resin selected from polyethylene terephthalate, polycarbonate, and acrylic resin.

Here, in front of the wearer H, no other member extending between the pair of temple portions 210 is arranged. As a result, when the wearer H wears spectacles, it is possible to prevent the spectacles from interfering with the holding member 200. Further, since no other member extending between the pair of temple portions 210 is arranged in front of the wearer H, it is possible to prevent the holding member 200 from becoming conspicuous.

Further, when the face shield 10 is attached to a mannequin (a face mannequin manufactured by Daiso Sangyo Co., Ltd.), the ratio (A2 / A1) of the area A2 of the holding member 200 to the face area A1 of the mannequin is the ratio (A2 / A1) of the face area A1 of the mannequin. , 0.1% or more and 5% or less is preferable. Here, in order to hold the shield portion 30A in front of the wearer H, when the face shield 10 is attached to the mannequin, the holding member 200 is not concealed by the mannequin in front view. It is preferable that the tip of 200 can be visually recognized. In this case, in order to be able to hold the shield portion 30A in front of the wearer H, the ratio can be 0.1% or more. Further, when the ratio is 5% or less, the holding member 200 can be made inconspicuous when the wearer H wears the face shield 10. Here, in the present implementation mode, "front view" means that the wearer H wears the face shield 10 so that the portion of the pair of temple portions 210 located in front of the ear hook portion 220 is horizontal. In the state where the second protruding portion 270 is in contact with the upper end of the second opening 82 described later (state shown in FIG. 17), the shield portion 30A (transparent laminated film 30) has the third curvature described later. It means that the face shield 10 is viewed from the normal direction in the horizontal central portion 77d (see FIG. 17) of the third curved surface 77c in the normal direction of the surface 77c.

Further, as shown in FIG. 18A, the pair of temple portions 210 may extend in parallel with each other in front of the ear hook portion 220. As a result, it is possible to prevent the portion of the pair of temple portions 210 located in front of the ear hook portion 220 from coming into contact with the head (for example, temple) of the wearer H. Therefore, it is possible to prevent the head of the wearer H from being tightened by the pair of temple portions 210. As a result, the wearer H can be prevented from feeling uncomfortable, and the wearer H can wear the face shield 10 without feeling stress. Further, as shown in FIG. 18B, the pair of temple portions 210 may be extended in front of the ear hook portion 220 so that the distance between the pair of temple portions 210 becomes longer toward the front. Also in this case, it is possible to prevent the portion of the pair of temple portions 210 located in front of the ear hook portion 220 from coming into contact with the head (for example, temple) of the wearer H.

Further, the force required to expand the temple portions 210 in the direction away from each other so that the distance between the tips of the temple portions 210 is 130 mm is 0.01 N or more and 3.0 N or less. preferable. As a result, it is possible to prevent the head of the wearer H from being tightened by the pair of temple portions 210. As a result, the wearer H can be prevented from feeling uncomfortable, and the wearer H can wear the face shield 10 without feeling stress. In this case, the force can be measured using a tensile tester (MCT-2150 (product name) manufactured by A & D Co., Ltd.).

The weight of such a holding member 200 is preferably 20 g or less. As a result, the wearer H can wear the face shield 10 without feeling stress.

Next, the shield portion 30A will be described. The shield portion 30A suppresses that droplets such as saliva due to sneezing and coughing of the wearer H adhere to the face of another person, and that droplets such as saliva due to sneezing and coughing of another person adhere to the face F of the wearer H. Play a role. The shield portion 30A is made of a transparent laminated film 30. In this embodiment, the shield portion 30A covers the entire face F of the wearer H. The shield portion 30A may cover only a part of the face F of the wearer H.

As shown in FIGS. 19 to 23, the transparent laminated film 30 constituting the shield portion 30A has an upper side 71, a lower side 72 facing the upper side 71, and a pair of side sides 73 extending between the upper side 71 and the lower side 72. It has a rectangular shape (see FIG. 23) having and.

Of these, a plurality of first cut portions 74a are formed on the lower side 72. In this embodiment, three first cut portions 74a are formed, and each of the first cut portions 74a is formed by cutting out the transparent laminated film 30 in a V shape. Further, a through hole 78a that penetrates the transparent laminated film 30 in the thickness direction is formed at the tip of the V-shape. As a result, it is possible to prevent the transparent laminated film 30 from being broken by the first cut portion 74a as a trigger. The shape of the first cut portion 74a is arbitrary, and for example, the first cut portion 74a may be formed by cutting the transparent laminated film 30 in a straight line.

Further, the first engaging portion 75a is formed on one side of the first cut portion 74a (right side shown in FIG. 23), and the first engaging portion 75a is formed on the other side of the first cut portion 74a (left side shown in FIG. 23). A first locking portion 76a for locking is formed. Of these, the first engaging portion 75a is formed on one side of each first notch portion 74a, and in this embodiment, three first engaging portions 75a are formed. In the illustrated example, each first engaging portion 75a is formed by a projecting piece provided so as to project from the lower side 72 toward the upper side 71, respectively.

The first locking portion 76a is formed on the other side of each first notch portion 74a, and in this embodiment, three first locking portions 76a are formed. In the illustrated example, each of the first locking portions 76a is formed by through holes penetrating the transparent laminated film 30 in the thickness direction, and the through holes constituting the first locking portion 76a are rectangular. It has a shape. However, the present invention is not limited to this, and the through hole constituting the first locking portion 76a may have an arbitrary shape such as a circular shape, an elliptical shape, or a polygonal shape with rounded corners.

Then, by locking the first engaging portion 75a to the first locking portion 76a, the first curved surface 77a (FIG. 19) is curved so as to be convex toward the side away from the wearer H in the vicinity of the lower side 72. , 20 and 22) are formed. As a result, the droplets scattered downward adhere to the first curved surface 77a. Therefore, it is possible to prevent the droplets from falling below the face shield 10. As a result, it is possible to prevent the droplets scattered downward from adhering to the surrounding structures.

Further, since the first curved surface 77a is curved so as to be convex toward the side away from the wearer H, the region where the first curved surface 77a is formed becomes when an impact is applied to the region. It is easy to be elastically deformed. Therefore, even if the face shield 10 is dropped, the region where the first curved surface 77a is formed is elastically deformed, so that the region can absorb the impact of the drop. Therefore, it is possible to prevent the face shield 10 from being damaged.

The first curved surface 77a may be a three-dimensional curved surface. In the present specification, the "three-dimensional curved surface" means a surface that is partially or wholly curved around each of a plurality of axes that are not parallel to each other. For example, the first curved surface 77a may be entirely curved so that its vertical cross-sectional shape becomes convex toward the side away from the wearer H at an arbitrary position, and its horizontal cross-sectional shape may be formed at an arbitrary position. However, it may be bent so as to be convex toward the side away from the wearer H.

Further, in this implementation mode, a plurality of second cut portions 74b are formed on the upper side 71. In this embodiment, three second cut portions 74b are formed, and each of the second cut portions 74b is formed by cutting out the transparent laminated film 30 in a V shape. Further, a through hole 78b is formed at the tip of the V-shape. As a result, it is possible to prevent the transparent laminated film 30 from being broken by the second cut portion 74b as a trigger. The shape of the second cut portion 74b is arbitrary, and for example, the second cut portion 74b may be formed by cutting the transparent laminated film 30 in a straight line.

Further, the second engaging portion 75b is formed on one side of the second cut portion 74b (left side shown in FIG. 23), and the second engaging portion 75b is formed on the other side of the second cut portion 74b (right side shown in FIG. 23). A second locking portion 76b is formed to lock the above. Of these, the second engaging portion 75b is formed on one side of each second notch portion 74b, and in this embodiment, three second engaging portions 75b are formed. In the illustrated example, each second engaging portion 75b is formed by a projecting piece provided so as to project from the upper side 71 toward the lower side 72, respectively.

The second locking portion 76b is formed on the other side of each second notch portion 74b, and in this embodiment, three second locking portions 76b are formed. In the illustrated example, each of the second locking portions 76b is formed by through holes penetrating the transparent laminated film 30 in the thickness direction, and the through holes constituting the second locking portion 76b are rectangular. It has a shape. However, the present invention is not limited to this, and the through hole constituting the second locking portion 76b may have an arbitrary shape such as a circular shape, an elliptical shape, or a polygonal shape with rounded corners.

Then, by locking the second engaging portion 75b to the second locking portion 76b, the second curved surface 77b (FIG. 19) is curved so as to be convex toward the side away from the wearer H in the vicinity of the upper side 71. , 21 and 22) are formed. As a result, the droplets scattered upward adhere to the second curved surface 77b. Therefore, it is possible to prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structures. Further, since the second curved surface 77b is formed in the vicinity of the upper side 71, the head of the wearer H can be covered by the second curved surface 77b, and the wearer H can be effectively protected from the droplets scattered from the outside. It can be protected.

The second curved surface 77b may be a three-dimensional curved surface. For example, the second curved surface 77b may be entirely curved so that its vertical cross-sectional shape becomes convex toward the side away from the wearer H at an arbitrary position, and its horizontal cross-sectional shape may be formed at an arbitrary position. However, it may be bent so as to be convex toward the side away from the wearer H.

Further, by locking the first engaging portion 75a to the first locking portion 76a and locking the second engaging portion 75b to the second locking portion 76b, the first curved surface 77a and the second A third curved surface 77c that is curved so as to be convex toward the side away from the wearer H is formed between the curved surface 77b and the wearer H. As a result, the droplets scattered in the direction facing the wearer and in the left-right direction as seen from the wearer adhere to the third curved surface 77c. Therefore, it is possible to prevent the droplets from scattering from the side of the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structures.

As shown in FIG. 22, the third curved surface 77c has a linear shape in a vertical cross section. As a result, it is possible to prevent the size of the face shield 10 (particularly the size in the front-rear direction) from becoming too large. Therefore, when the wearer H moves his / her head, it is possible to prevent the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or others. Further, since it is possible to prevent the size of the face shield 10 from becoming too large, even if the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

The third curved surface 77c may be a two-dimensional curved surface. In the present specification, the "two-dimensional curved surface" is a curved surface that is two-dimensionally curved around a single axis, or is two-dimensionally curved with the same or different curvatures around a plurality of axes parallel to each other. Means a curved surface. For example, the vertical cross-sectional shape of the third curved surface 77c may be a linear shape at an arbitrary position, and the horizontal cross-sectional shape of the third curved surface 77c may be convex toward the side away from the wearer H at an arbitrary position. It may be bent to.

Further, as shown in FIGS. 19, 22, and 23, the transparent laminated film 30 is formed with an opening 80 into which the mounting portion 250 is inserted. In this case, the openings 80 are formed in the vicinity of the pair of side sides 73, respectively.

Each opening 80 includes a first opening 81 into which the first protrusion 260 is inserted and a second opening 82 into which the second protrusion 270 is inserted. In the illustrated example, each opening 80 comprises two first openings 81 and two second openings 82, respectively. In this case, for example, by changing the first opening 81 into which the first protrusion 260 is inserted, the curvature of the first curved surface 77a, the second curved surface 77b, and the third curved surface 77c of the shield portion 30A can be easily increased. It can be changed to.

Each first opening 81 penetrates the transparent laminated film 30 in the thickness direction. Further, each of the first openings 81 has a shape corresponding to the first protrusion 260. In this embodiment, the first opening 81 has a circular shape having a diameter slightly larger than the diameter of the rod-shaped member constituting the first protrusion 260.

Each second opening 82 penetrates the transparent laminated film 30 in the thickness direction. Further, each of the second openings 82 has a rectangular shape extending in the vertical direction. In this embodiment, the height of the second opening 82 is higher than the height of the second protrusion 270, and as described above, there is play between the second protrusion 270 and the second opening 82. Is to be provided. In the illustrated example, in one opening 80, the shapes of the second openings 82 are different from each other. That is, in one opening 80, the height of one second opening 82 is higher than the height of the other second opening 82. However, the present invention is not limited to this, and in one opening 80, the shapes of the second openings 82 may be equal to each other.

The opening 80 is formed in the region where the third curved surface 77c is formed. Then, as described above, the third curved surface 77c is curved so as to be convex toward the side away from the wearer H. Therefore, by inserting the pair of mounting portions 250 into the opening 80 from the back surface (the surface on the wearer H side) side of the transparent laminated film 30, the holding member 200 described above can easily hold the transparent laminated film 30. It has become like.

In this implementation mode, when the face shield 10 is manufactured, first, the transparent laminated film 60 with a protective film is processed into a predetermined shape. In this case, the transparent laminated film 60 with a protective film may be processed by punching using a bik mold, cutting using a drill, or laser processing using a laser. From the viewpoint of processing speed and productivity, the transparent laminated film 60 with a protective film is preferably processed by punching.

Next, the front surface protective film 61 and the back surface protective film 62 are removed from the transparent laminated film 60 with a protective film processed into a predetermined shape. As a result, the transparent laminated film 30 processed into a predetermined shape is obtained (see FIG. 23).

After that, the first engaging portion 75a is locked to the first locking portion 76a, and the second engaging portion 75b is locked to the second locking portion 76b. As a result, the first curved surface 77a, the second curved surface 77b, and the third curved surface 77c are formed on the transparent laminated film 30. In this way, the shield portion 30A is assembled.

Further, in parallel with the production of the transparent laminated film 30, the holding member 200 is produced. At this time, for example, the holding member 200 shown in FIG. 16 is manufactured by bending an aluminum rod-shaped member.

Next, the mounting portion 250 of the holding member 200 is inserted into the opening 80 formed in the transparent laminated film 30. As a result, the face shield 10 shown in FIG. 16 is obtained.

As described above, according to the present embodiment, a plurality of first cut portions 74a are formed on the lower side 72 of the transparent laminated film 30 constituting the shield portion 30A. Further, a first engaging portion 75a is formed on one side of the first cut portion 74a, and a first locking portion 76a for locking the first engaging portion 75a is formed on the other side of the first cut portion 74a. There is. Then, by locking the first engaging portion 75a to the first locking portion 76a, a first curved surface 77a that is curved so as to be convex toward the side away from the wearer H is formed in the vicinity of the lower side 72. ing. As a result, the droplets scattered downward adhere to the first curved surface 77a. Therefore, it is possible to prevent the droplets from falling below the face shield 10. As a result, it is possible to prevent the droplets scattered downward from adhering to the surrounding structure.

Further, according to the present embodiment, a plurality of second cut portions 74b are formed on the upper side 71 of the transparent laminated film 30. Further, a second engaging portion 75b is formed on one side of the second cut portion 74b, and a second locking portion 76b for locking the second engaging portion 75b is formed on the other side of the second cut portion 74b. There is. Then, by locking the second engaging portion 75b to the second locking portion 76b, a second curved surface 77b that is curved so as to be convex toward the side away from the wearer H is formed in the vicinity of the upper side 71. ing. As a result, the droplets scattered upward adhere to the second curved surface 77b. Therefore, it is possible to prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure. Further, since the second curved surface 77b is formed in the vicinity of the upper side 71, the head of the wearer H can be covered by the second curved surface 77b, and the wearer H can be covered from the droplets scattered from the outside (above). Can be effectively protected.

Further, according to the present embodiment, the first engaging portion 75a is locked to the first locking portion 76a, and the second engaging portion 75b is locked to the second locking portion 76b. A third curved surface 77c that curves so as to be convex toward the side away from the wearer H is formed between the first curved surface 77a and the second curved surface 77b. As a result, the droplets scattered in the direction facing the wearer H and in the left-right direction as seen from the wearer H adhere to the third curved surface 77c. Therefore, it is possible to prevent the droplets from scattering from the side of the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure.

Further, according to this embodiment, the third curved surface 77c has a linear shape in a vertical cross section. As a result, it is possible to prevent the size of the face shield 10 from becoming too large. Therefore, when the wearer H moves his / her head, it is possible to prevent the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or others. Further, since it is possible to prevent the size of the face shield 10 from becoming too large, even if the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

Further, according to this embodiment, the holding member 200 has a pair of temple portions 210 including an ear hook portion 220 mounted on the ear E of the wearer H and a pair of temple portions 210 from behind the wearer H. It has a connecting portion 230 to be connected. Further, in front of the wearer H, no other member extending between the pair of temple portions 210 is arranged. As a result, when the wearer H wears spectacles, it is possible to prevent the spectacles from interfering with the holding member 200. Further, since no other member extending between the pair of temple portions 210 is arranged in front of the wearer H, it is possible to prevent the holding member 200 from becoming conspicuous. Therefore, it is possible to provide the face shield 10 that can reduce the wearing feeling.

Further, according to the present embodiment, the pair of temple portions 210 extend in parallel with each other in front of the ear hook portion 220, or the distance between the pair of temple portions 210 increases as the temple portions 210 extend toward the front. It extends like this. As a result, it is possible to prevent the portion of the pair of temple portions 210 located in front of the ear hook portion 220 from coming into contact with the wearer H. Therefore, it is possible to prevent the head of the wearer H from being tightened by the pair of temple portions 210. As a result, the wearer H can be prevented from feeling uncomfortable, and the wearer H can wear the face shield 10 without feeling stress.

Further, according to the present implementation mode, a weight 240 for adjusting the inclination of the temple portion 210 with respect to the horizontal direction is attached to the connecting portion 230. As a result, it is possible to prevent the shield portion 30A from coming into contact with the face F of the wearer H.

Further, according to this implementation mode, the holding member 200 is made of a metal rod-shaped member. As a result, even if the face shield 10 is dropped, it is possible to prevent the holding member 200 from being damaged.

Further, according to this implementation mode, the metal constituting the rod-shaped member is aluminum. Thereby, the holding member 200 can be easily formed. In addition, the weight of the holding member 200 can be reduced.

Further, according to this embodiment, the holding member 200 includes a pair of mounting portions 250 for holding the transparent laminated film 30, and the mounting portions 250 are located in the vicinity of the pair of side sides 73 of the transparent laminated film 30. An opening 80 to be inserted is formed. In this case, by inserting the mounting portion 250 into the opening 80, the holding member 200 can easily hold the transparent laminated film 30.

Further, according to this embodiment, the holding member 200 holds the transparent laminated film 30 so as to be movable in the vertical direction. As a result, even when the shield portion 30A comes into contact with the surrounding structure, the shield portion 30A moves with respect to the holding member 200, so that an impact is applied from the face shield 10 to the wearer H. In addition, it is possible to prevent the face shield 10 from coming off the wearer H.

Although the example in which the second curved surface 77b and the third curved surface 77c are formed on the transparent laminated film 30 in the above-mentioned implementation mode has been described, the present invention is not limited to this. For example, the second curved surface 77b and the third curved surface 77c may not be formed on the transparent laminated film 30.

Further, in the above-mentioned implementation mode, an example in which the temple portion 210 and the connecting portion 230 are integrally molded has been described, but the present invention is not limited to this. For example, as shown in FIG. 24, the connecting portion 230 may be provided separately from the temple portion 210. Then, the connecting portion 230 may adjust the inclination of the temple portion 210 with respect to the horizontal direction.

In this case, as shown in FIG. 25, the connecting portion 230 may include a main body portion 23a extending in a substantially arc shape and engaging portions 23b provided at both ends of the main body portion 23a. Of these, through holes 23c may be formed in the engaging portions 23b, respectively. Then, the connecting portion 230 may be configured to be attached to the temple portion 210 by inserting the temple portion 210 into the through hole 23c. In this case, for example, by adjusting the position of the connecting portion 230 with respect to the temple portion 210, the inclination of the temple portion 210 with respect to the horizontal direction can be adjusted by the weight of the connecting portion 230. The shape of the through hole 23c may be circular in front view, and is preferably a polygonal shape such as a quadrangular shape. Since the shape of the through hole 23c is a polygonal shape in the front view, the connecting portion 230 can stably hold the temple portion 210, and the inclination of the temple portion 210 with respect to the horizontal direction can be kept at a desired inclination. In this case, in the cross section along the direction orthogonal to the longitudinal direction of the temple portion 210, the cross-sectional shape of the temple portion 210 is preferably a polygonal shape such as a quadrangular shape.

According to this modification, the connecting portion 230 is provided separately from the temple portion 210, and the inclination of the temple portion 210 with respect to the horizontal direction is adjusted. As a result, it is possible to prevent the shield portion 30A from coming into contact with the face F of the wearer H. Further, when the connecting portion 230 is provided separately from the temple portion 210, the size of the connecting portion 230 can be changed according to the size of the head of the wearer H. Then, by appropriately changing the size of the connecting portion 230, it is possible to prevent the head of the wearer H from being tightened by the pair of temple portions 210. As a result, the wearer H can be prevented from feeling uncomfortable, and the wearer H can wear the face shield 10 without feeling stress.

<Second implementation mode>
Next, a second embodiment of the third embodiment will be described with reference to FIGS. 26 to 31. The second embodiment of the third embodiment shown in FIGS. 26 to 31 is mainly different from the first embodiment in the configuration of the shield portion (transparent laminated film). In FIGS. 26 to 31, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 26 to 31, even in this mode, the transparent laminated film 30 constituting the shield portion 30A is between the upper side 71, the lower side 72 facing the upper side 71, and the upper side 71 and the lower side 72. It has a rectangular shape (see FIG. 31) having a pair of side sides 73 extending to the surface.

As shown in FIGS. 27 to 31, a first lower panel 91a and a second lower panel 92a arranged along the extending direction of the lower side 72 (left-right direction in FIG. 31) are provided in the vicinity of the lower side 72. There is. Further, a lower fixing panel 95a for fixing the first lower panel 91a and the second lower panel 92a is provided on the upper side 71 side of the first lower panel 91a and the second lower panel 92a.

The first lower panel 91a and the second lower panel 92a each have a pentagonal shape with one corner of a rectangle cut out in front view. Specifically, the first lower panel 91a has a pentagonal shape in which the upper right corner of the rectangle is cut out in the front view. On the other hand, the second lower panel 92a has a pentagonal shape in which the upper left corner of the rectangle is cut out in the front view. The first lower panel 91a and the second lower panel 92a are symmetrical with respect to the first lower notch 101a described later. The lower fixed panel 95a has a triangular shape when viewed from the front.

The first lower panel 91a and the second lower panel 92a are separated from each other by the first lower notch 101a penetrating the transparent laminated film 30. The first lower cut portion 101a is formed along the extending direction (vertical direction in FIG. 31) of the side side 73.

The first lower panel 91a and the lower fixing panel 95a are separated from each other by the second lower notch 102a penetrating the transparent laminated film 30. Further, the second lower panel 92a and the lower fixing panel 95a are separated from each other by a third lower notch 103a penetrating the transparent laminated film 30. The second lower cut portion 102a and the third lower cut portion 103a are inclined in both the extending direction of the lower side 72 (horizontal direction in FIG. 31) and the extending direction of the side side 73 (vertical direction in FIG. 31, respectively). It is formed along the direction of The third lower cut portion 103a and the fourth lower cut portion 104a are connected to each other and are connected to the first lower cut portion 101a, respectively.

Then, by fixing the first lower panel 91a and the second lower panel 92a to the lower fixing panel 95a in a state where the first lower panel 91a and the second lower panel 92a are overlapped with each other, the first lower panel 91a and the second lower panel 92a are fixed to the lower fixing panel 95a so as to be convex toward the side away from the wearer H in the vicinity of the lower side 72. A curved first lower curved surface 96a (see FIGS. 26, 27, 28 and 30) is formed. As a result, the droplets scattered downward adhere to the first lower curved surface 96a. Therefore, it is possible to prevent the droplets from falling below the face shield 10. As a result, it is possible to prevent the droplets scattered downward from adhering to the surrounding structures.

Further, since the first lower curved surface 96a is curved so as to be convex toward the side away from the wearer H, the region where the first lower curved surface 96a is formed is when an impact is applied to the region. In addition, it is easily deformed elastically. Therefore, even if the face shield 10 is dropped, the region where the first lower curved surface 96a is formed is elastically deformed, so that the region can absorb the impact of the drop. Therefore, it is possible to prevent the face shield 10 from being damaged.

The first lower curved surface 96a may be a three-dimensional curved surface. For example, the first lower curved surface 96a may be bent as a whole so that its vertical cross-sectional shape becomes convex toward the side away from the wearer H at an arbitrary position, and its horizontal cross section may be formed at an arbitrary position. The shape may be bent so as to be convex toward the side away from the wearer H.

Further, the third lower panel 93a and the fourth are arranged on the lower side 72 side (outside) of the first lower panel 91a and the second lower panel 92a along the extending direction of the lower side 72 (left-right direction in FIG. 31). A lower panel 94a is provided. In the present specification, the "outside" means the side away from the center of the transparent laminated film 30.

The third lower panel 93a and the fourth lower panel 94a each have an L-shape in front view. The third lower panel 93a and the fourth lower panel 94a are symmetrical with respect to the fourth lower notch 104a, which will be described later.

The third lower panel 93a and the fourth lower panel 94a are separated from each other by the fourth lower cut portion 104a penetrating the transparent laminated film 30. The fourth lower cut portion 104a extends from the lower side 72. Further, the fourth lower cut portion 104a is formed along the extending direction (vertical direction in FIG. 31) of the side side 73. The fourth lower cut portion 104a is connected to the first lower cut portion 101a.

The first lower panel 91a and the third lower panel 93a are separated from each other by a fifth lower notch 105a penetrating the transparent laminated film 30. Further, the second lower panel 92a and the fourth lower panel 94a are separated from each other by the sixth lower cut portion 106a penetrating the transparent laminated film 30. The fifth lower cut portion 105a and the sixth lower cut portion 106a are each formed along the extending direction (left-right direction in FIG. 31) of the lower side 72. The fifth lower cut portion 105a and the sixth lower cut portion 106a are connected to each other and are connected to the first lower cut portion 101a and the fourth lower cut portion 104a, respectively.

Further, the first lower panel 91a and the third lower panel 93a are separated from each other by the seventh lower notch portion 107a penetrating the transparent laminated film 30. The seventh lower cut portion 107a is formed along the extending direction (vertical direction in FIG. 31) of the side side 73. The seventh lower notch 107a is connected to the fifth lower notch 105a.

Further, the second lower panel 92a and the fourth lower panel 94a are separated from each other by the eighth lower cut portion 108a penetrating the transparent laminated film 30. The eighth lower cut portion 108a is formed along the extending direction (vertical direction in FIG. 31) of the side side 73. The eighth lower cut portion 108a is connected to the sixth lower cut portion 106a.

Then, by fixing the third lower panel 93a and the fourth lower panel 94a to the lower fixing panel 95a in a state where the third lower panel 93a and the fourth lower panel 94a are overlapped with each other, the third lower panel 93a is convex to the outside of the first lower curved surface 96a toward the side away from the wearer H. A second lower curved surface 97a that is curved so as to be formed is formed. As a result, the droplets scattered downward adhere to the first lower curved surface 96a and the second lower curved surface 97a. Therefore, it is possible to more effectively prevent the droplets from falling below the face shield 10. As a result, it is possible to more effectively prevent the droplets scattered downward from adhering to the surrounding structures.

The second lower curved surface 97a may be a three-dimensional curved surface. For example, the second lower curved surface 97a may be bent as a whole so that its vertical cross-sectional shape becomes convex toward the side away from the wearer H at an arbitrary position, and its horizontal cross section may be formed at an arbitrary position. The shape may be bent so as to be convex toward the side away from the wearer H.

In this embodiment, even if the first lower panel 91a, the second lower panel 92a, the third lower panel 93a, and the fourth lower panel 94a are fixed to the lower fixing panel 95a via the fixing member 100a. good. In this case, the fixing member 100a may be, for example, a stapler. Further, the fixing member 100a may be an adhesive, a tape, a clip or the like.

Further, as shown in FIGS. 27 to 31, a first upper panel 91b and a second upper panel 92b arranged along the extending direction of the upper side 71 (left-right direction in FIG. 31) are provided in the vicinity of the upper side 71. Has been done. Further, an upper fixing panel 95b for fixing the first upper panel 91b and the second upper panel 92b is provided on the lower side 72 side of the first upper panel 91b and the second upper panel 92b.

The first upper panel 91b and the second upper panel 92b each have a pentagonal shape in which one corner of a rectangle is cut out in a front view. Specifically, the first upper panel 91b has a pentagonal shape in which the lower right corner of the rectangle is cut out in the front view. On the other hand, the second upper panel 92b has a pentagonal shape in which the lower left corner of the rectangle is cut out in the front view. The first upper panel 91b and the second upper panel 92b are symmetrical with respect to the first upper notch 101b described later. The upper fixed panel 95b has a triangular shape when viewed from the front.

The first upper panel 91b and the second upper panel 92b are separated from each other by the first upper notch 101b penetrating the transparent laminated film 30. The first upper cut portion 101b is formed along the extending direction (vertical direction in FIG. 31) of the side side 73.

The first upper panel 91b and the upper fixing panel 95b are separated from each other by the second upper notch 102b penetrating the transparent laminated film 30. Further, the second upper panel 92b and the upper fixing panel 95b are separated from each other by a third upper notch 103b penetrating the transparent laminated film 30. The second upper notch 102b and the third upper notch 103b are inclined in both the extending direction of the upper side 71 (horizontal direction in FIG. 31) and the extending direction of the side 73 (vertical direction in FIG. 31), respectively. It is formed along the direction of The third upper notch 103b and the fourth upper notch 104b are connected to each other and are connected to the first upper notch 101b, respectively.

Then, by fixing the first upper panel 91b and the second upper panel 92b to the upper fixing panel 95b in a state where the first upper panel 91b and the second upper panel 92b are overlapped with each other, the first upper panel 91b and the second upper panel 92b are fixed to the upper fixing panel 95b so as to be convex toward the side away from the wearer H in the vicinity of the upper side 71. A curved first upper curved surface 96b (see FIGS. 26, 27, 29 and 30) is formed. As a result, the droplets scattered upward adhere to the first upper curved surface 96b. Therefore, it is possible to prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structures. Further, since the first upper curved surface 96b is formed in the vicinity of the upper side 71, the head of the wearer H can be covered by the first upper curved surface 96b, and the wearer H is effective from the droplets scattered from the outside. It is designed to be protected.

The first upper curved surface 96b may be a three-dimensional curved surface. For example, the first upper curved surface 96b may be bent as a whole so that its vertical cross-sectional shape becomes convex toward the side away from the wearer H at an arbitrary position, and its horizontal cross section may be formed at an arbitrary position. The shape may be bent so as to be convex toward the side away from the wearer H.

Further, the third upper panel 93b and the fourth are arranged along the extending direction (left-right direction in FIG. 31) of the upper side 71 on the upper side 71 side (outside) of the first upper panel 91b and the second upper panel 92b. An upper panel 94b is provided.

The third upper panel 93b and the fourth upper panel 94b each have an L-shape in front view. The third upper panel 93b and the fourth upper panel 94b are symmetrical with respect to the fourth upper notch 104b described later.

The third upper panel 93b and the fourth upper panel 94b are separated from each other by the fourth upper notch 104b penetrating the transparent laminated film 30. The fourth upper cut portion 104b extends from the upper side 71. Further, the fourth upper cut portion 104b is formed along the extending direction (vertical direction in FIG. 31) of the side side 73. The fourth upper notch 104b is connected to the first upper notch 101b.

The first upper panel 91b and the third upper panel 93b are separated from each other by a fifth upper notch 105b penetrating the transparent laminated film 30. Further, the second upper panel 92b and the fourth upper panel 94b are separated from each other by the sixth upper notch portion 106b penetrating the transparent laminated film 30. The fifth upper cut portion 105b and the sixth upper cut portion 106b are each formed along the extending direction (left-right direction in FIG. 31) of the upper side 71. The fifth upper notch 105b and the sixth upper notch 106b are connected to each other and are connected to the first upper notch 101b and the fourth upper notch 104b, respectively.

Further, the first upper panel 91b and the third upper panel 93b are separated from each other by the seventh upper notch portion 107b penetrating the transparent laminated film 30. The seventh upper cut portion 107b is formed along the extending direction (vertical direction in FIG. 31) of the side side 73. The seventh upper notch 107b is connected to the fifth upper notch 105b.

Further, the second upper panel 92b and the fourth upper panel 94b are separated from each other by the eighth upper notch 108b penetrating the transparent laminated film 30. The eighth upper cut portion 108b is formed along the extending direction (vertical direction in FIG. 31) of the side side 73. The eighth upper notch 108b is connected to the sixth upper notch 106b.

Then, by fixing the third upper panel 93b and the fourth upper panel 94b to the upper fixing panel 95b in a state where the third upper panel 93b and the fourth upper panel 94b are overlapped with each other, the third upper panel 93b and the fourth upper panel 94b are convex to the outside of the first upper curved surface 96b toward the side away from the wearer H. The second upper curved surface 97b that curves so as to be formed is formed. As a result, the droplets scattered upward adhere to the first upper curved surface 96b and the second upper curved surface 97b. Therefore, it is possible to prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structures. Further, since the second upper curved surface 97b is formed in the vicinity of the upper side 71, the head of the wearer H can be covered by the second upper curved surface 97b, and the wearer H is effective from the droplets scattered from the outside. It is designed to be protected.

The second upper curved surface 97b may be a three-dimensional curved surface. For example, the second upper curved surface 97b may be bent as a whole so that its vertical cross-sectional shape becomes convex toward the side away from the wearer H at an arbitrary position, and its horizontal cross section may be formed at an arbitrary position. The shape may be bent so as to be convex toward the side away from the wearer H.

The first lower curvature is formed by fixing the first lower panel 91a and the second lower panel 92a to the lower fixing panel 95a and fixing the first upper panel 91b and the second upper panel 92b to the upper fixing panel 95b. An intermediate curved surface 98 that curves so as to be convex toward the side away from the wearer H is formed between the surface 96a and the first upper curved surface 96b. As a result, the droplets scattered in the direction facing the wearer and in the left-right direction as seen from the wearer adhere to the curved surface 98 of the intermediate portion. Therefore, it is possible to prevent the droplets from scattering from the side of the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structures.

As shown in FIG. 30, the intermediate curved surface 98 has a linear shape in a vertical cross section. As a result, it is possible to prevent the size of the face shield 10 (particularly the size in the front-rear direction) from becoming too large. Therefore, when the wearer H moves his / her head, it is possible to prevent the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or others. Further, since it is possible to prevent the size of the face shield 10 from becoming too large, even if the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

The intermediate curved surface 98 may be a two-dimensional curved surface. For example, the intermediate curved surface 98 may have a linear cross-sectional shape at an arbitrary position, and the horizontal cross-sectional shape may be convex toward the side away from the wearer H at an arbitrary position. It may be bent to.

In this embodiment, even if the first upper panel 91b, the second upper panel 92b, the third upper panel 93b, and the fourth upper panel 94b are fixed to the upper fixing panel 95b via the fixing member 100b. good. In this case, the fixing member 100b may be, for example, a stapler. Further, the fixing member 100b may be an adhesive, a tape, a clip or the like.

Further, in the present implementation mode, "front view" means that the wearer H wears the face shield 10 so that the portion of the pair of temple portions 210 located in front of the ear hook portion 220 is horizontal. In the state where the second protruding portion 270 is in contact with the upper end of the second opening 82 (the state shown in FIG. 27), which will be described later, the intermediate curved surface of the normal direction of the intermediate curved surface 98 is in contact with the upper end. It means to see the face shield 10 from the normal direction in the horizontal central portion 99 (see FIG. 27) of 98.

Further, also in this implementation mode, for example, by changing the first opening 81 into which the first protrusion 260 is inserted, the front and rear positions of the shield portion 30A can be adjusted.

Further, in this embodiment, the opening 80 is formed in the region where the intermediate curved surface 98 is formed. Then, as described above, the intermediate curved surface 98 is curved so as to be convex toward the side away from the wearer H. Therefore, by inserting the pair of mounting portions 250 into the opening 80 from the back surface (the surface on the wearer H side) side of the transparent laminated film 30, the holding member 200 described above can easily hold the transparent laminated film 30. It has become like.

As described above, according to the present implementation mode, the first lower panel 91a and the second lower panel 92a arranged along the extending direction of the lower side 72 are provided in the vicinity of the lower side 72. Further, a lower fixing panel 95a for fixing the first lower panel 91a and the second lower panel 92a is provided on the upper side 71 side of the first lower panel 91a and the second lower panel 92a. Further, the first lower panel 91a and the second lower panel 92a are separated from each other by the first lower cut portion 101a penetrating the transparent laminated film 30. Further, the first lower panel 91a and the lower fixing panel 95a are separated from each other by the second lower notch 102a penetrating the transparent laminated film 30. Further, the second lower panel 92a and the lower fixing panel 95a are separated from each other by the third lower notch 103a penetrating the transparent laminated film 30. Then, by fixing the first lower panel 91a and the second lower panel 92a to the lower fixing panel 95a in a state where the first lower panel 91a and the second lower panel 92a are overlapped with each other, the first lower panel 91a and the second lower panel 92a are fixed to the lower fixing panel 95a so as to be convex toward the side away from the wearer H in the vicinity of the lower side 72. A curved first lower curved surface 96a is formed. As a result, the droplets scattered downward adhere to the first lower curved surface 96a. Therefore, it is possible to prevent the droplets from falling below the face shield 10. As a result, it is possible to prevent the droplets scattered downward from adhering to the surrounding structure.

Further, according to the present embodiment, the third lower panel 93a and the fourth lower panel 94a are arranged on the lower side 72 side of the first lower panel 91a and the second lower panel 92a along the extending direction of the lower side 72. Is provided. Further, the third lower panel 93a and the fourth lower panel 94a are separated from each other by the fourth lower cut portion 104a penetrating the transparent laminated film 30. Further, the first lower panel 91a and the third lower panel 93a are separated from each other by a fifth lower notch 105a penetrating the transparent laminated film 30. Further, the second lower panel 92a and the fourth lower panel 94a are separated from each other by the sixth lower cut portion 106a penetrating the transparent laminated film 30. Then, by fixing the third lower panel 93a and the fourth lower panel 94a to the lower fixing panel 95a in a state where the third lower panel 93a and the fourth lower panel 94a are overlapped with each other, the third lower panel 93a is convex to the outside of the first lower curved surface 96a toward the side away from the wearer H. A second lower curved surface 97a that is curved so as to be is formed. As a result, the droplets scattered downward adhere to the first lower curved surface 96a and the second lower curved surface 97a. Therefore, it is possible to more effectively prevent the droplets from falling below the face shield 10. As a result, it is possible to more effectively prevent the droplets scattered downward from adhering to the surrounding structure.

Further, according to the present implementation mode, the fourth lower notch portion 104a extends from the lower side 72. As a result, the curvature of the second lower curved surface 97a formed by the third lower panel 93a and the fourth lower panel 94a can be increased. Therefore, the second lower curved surface 97a easily covers the chin of the wearer H from below. As a result, it is possible to more effectively prevent the droplets from falling below the face shield 10. Therefore, it is possible to more effectively prevent the droplets scattered downward from adhering to the surrounding structure.

Further, according to the present implementation mode, the first upper panel 91b and the second upper panel 92b arranged along the extending direction of the upper side 71 are provided in the vicinity of the upper side 71. Further, an upper fixing panel 95b for fixing the first upper panel 91b and the second upper panel 92b is provided on the lower side 72 side of the first upper panel 91b and the second upper panel 92b. Further, the first upper panel 91b and the second upper panel 92b are separated from each other by the first upper notch 101b penetrating the transparent laminated film 30. Further, the first upper panel 91b and the upper fixing panel 95b are separated from each other by the second upper notch 102b penetrating the transparent laminated film 30. Further, the second upper panel 92b and the upper fixing panel 95b are separated from each other by the third upper notch 103b penetrating the transparent laminated film 30. Then, by fixing the first upper panel 91b and the second upper panel 92b to the upper fixing panel 95b in a state where the first upper panel 91b and the second upper panel 92b are overlapped with each other, the first upper panel 91b and the second upper panel 92b are fixed to the upper fixing panel 95b so as to be convex toward the side away from the wearer H in the vicinity of the upper side 71. A curved first upper curved surface 96b is formed. As a result, the droplets scattered upward adhere to the first upper curved surface 96b. Therefore, it is possible to prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure. Further, since the first upper curved surface 96b is formed in the vicinity of the upper side 71, the head of the wearer H can be covered by the first upper curved surface 96b, and the wearer H is effective from the droplets scattered from the outside. Can be protected.

Further, according to the present embodiment, the third upper panel 93b and the fourth upper panel 94b are arranged on the upper side 71 side of the first upper panel 91b and the second upper panel 92b along the extending direction of the upper side 71. Is provided. Further, the third upper panel 93b and the fourth upper panel 94b are separated from each other by the fourth upper notch portion 104b penetrating the transparent laminated film 30. Further, the first upper panel 91b and the third upper panel 93b are separated from each other by a fifth upper notch 105b penetrating the transparent laminated film 30. Further, the second upper panel 92b and the fourth upper panel 94b are separated from each other by the sixth upper notch 106b penetrating the transparent laminated film 30. Then, by fixing the third upper panel 93b and the fourth upper panel 94b to the upper fixing panel 95b in a state where the third upper panel 93b and the fourth upper panel 94b are overlapped with each other, the third upper panel 93b and the fourth upper panel 94b are convex to the outside of the first upper curved surface 96b toward the side away from the wearer H. A second upper curved surface 97b that is curved so as to be is formed. As a result, the droplets scattered upward adhere to the first upper curved surface 96b and the second upper curved surface 97b. Therefore, it is possible to more effectively prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to more effectively suppress the droplets scattered upward from adhering to the surrounding structures. Further, since the second upper curved surface 97b is formed in the vicinity of the upper side 71, the head of the wearer H can be covered by the second upper curved surface 97b, and the wearer H is effective from the droplets scattered from the outside. Can be protected.

Further, according to the present implementation mode, the fourth upper notch portion 104b extends from the upper side 71. As a result, the curvature of the second upper curved surface 97b formed by the third upper panel 93b and the fourth upper panel 94b can be increased. Therefore, the second upper curved surface 97b easily covers the head of the wearer H from above. As a result, it is possible to more effectively prevent the droplets from being scattered from above the face shield 10 to the surroundings. For this reason, it is possible to more effectively prevent the droplets scattered upward from adhering to the surrounding structures. In addition, the wearer H can be more effectively protected from droplets scattered from the outside.

Further, according to the present embodiment, the first lower panel 91a and the second lower panel 92a are fixed to the lower fixing panel 95a, and the first upper panel 91b and the second upper panel 92b are fixed to the upper fixing panel 95b. By fixing, an intermediate curved surface 98 that curves so as to be convex toward the side away from the wearer H is formed between the first lower curved surface 96a and the first upper curved surface 96b. As a result, the droplets scattered in the direction facing the wearer H and in the left-right direction as seen from the wearer H adhere to the curved surface 98 of the intermediate portion. Therefore, it is possible to prevent the droplets from scattering from the side of the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure.

Further, according to this embodiment, the curved surface 98 of the intermediate portion has a linear shape in a vertical cross section. As a result, it is possible to prevent the size of the face shield 10 from becoming too large. Therefore, when the wearer H moves his / her head, it is possible to prevent the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or others. Further, since it is possible to prevent the size of the face shield 10 from becoming too large, even if the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

<Third implementation mode>
Next, the third embodiment of the third embodiment will be described with reference to FIGS. 32 to 37. In the third embodiment of the third embodiment shown in FIGS. 32 to 37, the configuration of the shield portion (transparent laminated film) is mainly different from that of the second embodiment. In FIGS. 32 to 37, the same parts as those in the first embodiment mode or the second embodiment mode are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 32 to 37, even in this embodiment, the transparent laminated film 30 constituting the shield portion 30A is located between the upper side 71, the lower side 72 facing the upper side 71, and the upper side 71 and the lower side 72. It has a rectangular shape (see FIG. 37) having a pair of extending side sides 73.

As shown in FIGS. 33 to 37, between the pair of first mountain fold portions 121b extending from the upper side 71 and the pair of first mountain fold portions 121b extending from the upper side 71 on the shield portion 30A (transparent laminated film 30). A pair of first valley folding portions 122b provided in the above are formed.

Further, the shield portion 30A (transparent laminated film 30) has a pair of second mountain fold portions 121a extending from the lower side 72 and a pair of second fold portions extending from the lower side 72 and provided between the pair of second mountain fold portions 121a. A valley fold portion 122a is formed.

The pair of first mountain fold portions 121b and the pair of second mountain fold portions 121a extend along the extending direction (vertical direction in FIG. 37) of the side sides 73, respectively. Further, the pair of first valley fold portions 122b extend along a direction inclined in the extending direction of the side side 73 so as to be separated from each other from the upper side 71 side toward the lower side 72 side. Further, the pair of second valley fold portions 122a extend along a direction inclined in the extending direction of the side side 73 so as to be separated from each other from the lower side 72 side toward the upper side 71 side.

Then, by folding the transparent laminated film 30 along the pair of first mountain fold portions 121b and the pair of first valley fold portions 122b, the transparent laminated film 30 is provided above the front surface 150 and the front surface 150, and is folded rearward from the front surface 150. The top surface 151 may be formed (see FIGS. 32, 33, 35 and 36). As a result, the droplets scattered upward adhere to the upper surface 151. Therefore, it is possible to prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure. Further, by forming the upper surface 151, the head surface of the wearer H can be covered by the upper surface 151, and the wearer H can be effectively protected from the droplets scattered from the outside (upper side).

Further, the transparent laminated film 30 is provided on the front surface 150 and below the front surface 150 by folding along the pair of second mountain fold portions 121a and the pair of second valley fold portions 122a, and is folded rearward from the front surface 150. The lower surface 152 may be formed (see FIGS. 32, 33, 34 and 36). As a result, the droplets scattered downward adhere to the lower surface 152. Therefore, it is possible to prevent the droplets from falling below the face shield 10. As a result, it is possible to prevent the droplets scattered downward from adhering to the surrounding structure.

Further, the transparent laminated film 30 is folded along the pair of first mountain fold portions 121b and the pair of first valley fold portions 122b, and along the pair of second mountain fold portions 121a and the pair of second valley fold portions 122a. By folding the front surface 150, a side surface 153 extending rearward from the front surface 150 is formed on the side surface of the front surface 150. As a result, the droplets scattered in the direction facing the wearer H and in the left-right direction as seen from the wearer H adhere to the side surface 153. Therefore, it is possible to prevent the droplets from scattering from the side of the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure.

In this implementation mode, the front surface 150 has a rectangular shape in front view. Further, the front surface 150 may be a flat surface.

The upper surface 151 and the lower surface 152 are folded so as to be orthogonal to the front surface 150 in the side view. The upper surface 151 and the lower surface 152 may be flat surfaces, respectively.

The side surface 153 is connected to the front surface 150, the upper surface 151, and the lower surface 152. Of the side surface 153, the portion near the upper surface 151 and the lower surface 152 may be a three-dimensional curved surface, and the other portion may be a two-dimensional curved surface.

In this embodiment, the transparent laminated film 30 may be fixed by, for example, a fixing member (not shown) when it is folded along the pair of first mountain fold portions 121b or the like. The fixing member may be, for example, a staple, an adhesive, a tape, a clip, or the like.

Further, in the present implementation mode, "front view" means that the wearer H wears the face shield 10 so that the portion of the pair of temple portions 210 located in front of the ear hook portion 220 is horizontal. In the state where the second protruding portion 270 is in contact with the upper end of the second opening 82 described later, the normal line in the central portion 150a (see FIG. 33) of the front surface 150 in the normal line direction of the front surface 150. It means looking at the face shield 10 from the direction.

Further, also in this embodiment, for example, by changing the first opening 81 into which the first protrusion 260 is inserted, the front and rear positions of the shield portion 30A (transparent laminated film 30) can be adjusted. There is.

Further, in this embodiment mode, the opening 80 is formed in the region where the side surface 153 is formed. Then, as described above, the side surface 153 extends rearward from the front surface 150. Therefore, by inserting the pair of mounting portions 250 into the opening 80 from the back surface (the surface on the wearer H side) side of the transparent laminated film 30, the holding member 200 described above can easily hold the transparent laminated film 30. It has become like.

As described above, according to the present embodiment, the transparent laminated film 30 is provided between the pair of first mountain fold portions 121b extending from the upper side 71 and the pair of first mountain fold portions 121b extending from the upper side 71. A pair of first valley fold portions 122b is formed. Further, the pair of first mountain fold portions 121b extend along the extending direction of the side side 73. Further, the pair of first valley fold portions 122b extend along a direction inclined in the extending direction of the side side 73 so as to be separated from each other from the upper side 71 side toward the lower side 72 side. Then, by folding the transparent laminated film 30 along the pair of first mountain fold portions 121b and the pair of first valley fold portions 122b, the transparent laminated film 30 is provided above the front surface 150 and the front surface 150, and is folded rearward from the front surface 150. The upper surface 151 is formed. As a result, the droplets scattered upward adhere to the upper surface 151. Therefore, it is possible to prevent the droplets from being scattered from above the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure. Further, by forming the upper surface 151, the head surface of the wearer H can be covered by the upper surface 151, and the wearer H can be effectively protected from the droplets scattered from the outside (upper side).

Further, according to the present embodiment, the transparent laminated film 30 is provided with a pair of second mountain fold portions 121a extending from the lower side 72 and a pair of second mountain fold portions 121a extending from the lower side 72 and provided between the pair of second mountain fold portions 121a. A second valley fold portion 122a is formed. Further, the pair of second mountain fold portions 121a extend along the extending direction of the side side 73. Further, the pair of second valley fold portions 122a extend along a direction inclined in the extending direction of the side side 73 so as to be separated from each other from the lower side 72 side toward the upper side 71 side. Then, by folding the transparent laminated film 30 along the pair of second mountain fold portions 121a and the pair of second valley fold portions 122a, the transparent laminated film 30 is provided on the front surface 150 and below the front surface 150, and is folded rearward from the front surface 150. The lower surface 152 is formed. As a result, the droplets scattered downward adhere to the lower surface 152. Therefore, it is possible to prevent the droplets from falling below the face shield 10. As a result, it is possible to prevent the droplets scattered downward from adhering to the surrounding structure.

Further, according to the present embodiment, the transparent laminated film 30 is folded along the pair of first mountain fold portions 121b and the pair of first valley fold portions 122b, and the pair of second mountain fold portions 121a and the pair of first mountain fold portions 121a. By folding along the two valley folding portions 122a, a side surface 153 extending rearward from the front surface 150 is formed on the side of the front surface 150. As a result, the droplets scattered in the direction facing the wearer H and in the left-right direction as seen from the wearer H adhere to the side surface 153. Therefore, it is possible to prevent the droplets from scattering from the side of the face shield 10 to the surroundings. As a result, it is possible to prevent the scattered droplets from adhering to the surrounding structure.

Next, a specific example in the above embodiment will be described.

(Example D1)
First, the transparent laminated film 30 shown in FIG. 3A was produced. At this time, first, the surface antireflection layer 40 was prepared. When producing the surface antireflection layer 40, first, a triacetyl cellulose film (refractive index 1.49) having a thickness of 60 μm was prepared as the surface transparent base material layer 42. Next, a coating liquid for forming a hard coat layer having the following formulation was applied onto the triacetyl cellulose film, dried and irradiated with ultraviolet rays to form a surface hard coat layer 44 having a thickness of 10 μm, a refractive index of 1.54 and a pencil hardness of 2H. .. Next, a coating liquid for forming a high refractive index layer of the following formulation was applied onto the surface hard coat layer 44, dried and irradiated with ultraviolet rays to form a surface high refractive index layer 46 having a thickness of 150 nm and a refractive index of 1.63. Next, a coating liquid for forming a low refractive index layer according to the following formulation is applied onto the surface high refractive index layer 46, dried and irradiated with ultraviolet rays to form a surface low refractive index layer 45 having a thickness of 100 nm and a refractive index of 1.30. , A surface antireflection layer 40 was obtained.

<Preparation of coating liquid for forming a high refractive index layer>
0.1 part by mass of photopolymerization initiator (BASF, Irgacure 127) and 92.6 parts by mass of diluting solvent (methyl isobutyl ketone / cyclohexanone / methyl ethyl ketone = 4/2/4) were added, and the mixture was stirred until there was no undissolved residue. .. 1.25 parts by mass of a photo-curing resin (Beam Set 577 manufactured by Arakawa Chemical Co., Ltd.) was added thereto, and the mixture was stirred until there was no undissolved residue. Furthermore, 6 parts by mass of zirconium oxide (MZ-230X manufactured by Sumitomo Osaka Cement Co., Ltd., solid content 32.5% by mass, average primary particle diameter 15 to 50 nm), leveling agent (manufactured by Dainichiseika Kogyo Co., Ltd., Seika Beam 10-28) MB)) 0.05 parts by mass were added and stirred to prepare a coating liquid for forming a high refractive index layer.

<Preparation of coating liquid for forming a low refractive index layer>
0.2 parts by mass of a photopolymerization initiator (Irgacure 127, manufactured by BASF) and 91.1 parts by mass of a diluting solvent (MIBK / AN = 7/3) were added, and the mixture was stirred until there was no undissolved residue. Here, 1.0 part by mass of a photocurable resin (KAYARAD-PET-30 manufactured by Nippon Kayaku Co., Ltd.), 7.6 parts by mass of hollow silica particles (solid content 20% by mass, average primary particle diameter 60 nm), and a leveling agent (large). 0.1 parts by mass of Seika Beam 10-28 (MB) manufactured by Nisseika Kogyo Co., Ltd. was added and stirred to prepare a coating liquid for forming a low refractive index layer.

At this time, first, a sample having a size of 20 mm × 20 mm was cut out from the obtained transparent laminated film 30. Next, a black resin plate was brought into close contact with the back surface of the sample. Next, the surface of the sample was irradiated with light so that the incident angle was 5 °. At this time, the wavelength of the light was set to 550 nm, and the surface of the sample was irradiated with the light. Then, the reflection spectrum of light was measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation), and the reflectance of light was calculated.

(2) Visibility evaluation test In addition, a visibility evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 shown in FIG. 26 was produced using the obtained transparent laminated film 30. Next, five experimenters were randomly selected from men and women over the age of 22. Then, the visibility of the facial expressions of the five experimenters wearing the face shield 10 was confirmed. At this time, the facial expression of the experimenter was observed from a distance of about 1 m to 2 m from the experimenter in a general indoor environment illuminated by a fluorescent lamp. In addition, the observer observed the facial expression of the experimenter while moving about 20 ° to the left and right around the surface 301 of the face shield 10 from the state facing the experimenter.

(3) Splash Prevention Functionality Evaluation Test In addition, a splash prevention functionality evaluation test of the transparent laminated film 30 was carried out. In the splash prevention functionality evaluation test, the external splash prevention function that protects the wearer from the splashes scattered from the outside and the internal splash prevention function that prevents the splashes scattered from the wearer from scattering to the surroundings were evaluated.

At this time, first, the alcohol spray bottle (capacity 30 ml) was filled with deionized water. In addition, a doll with a through hole from the back of the head to the mouth was prepared. Then, the face shield 10 was attached to the head of the doll. In addition, a coarse particle counter (ZN-PD-S (product name) manufactured by OMRON Corporation) was prepared.

Evaluation of external splash prevention function Next, a tube was attached to the measuring part (that is, the suction port) of the coarse particle counter. Then, the tube was installed so that the tip of the tube was placed near the mouth of the doll between the doll and the shield portion 30A.

Next, the spray is filled from a position where the horizontal position is 1 m away from the face shield 10 and the vertical position is the same as the vertical position of the upper side 71 of the transparent laminated film 30 constituting the shield portion 30A. Deionized water was sprayed. Then, the number of floating ink particles was counted by the coarse particle counter. At this time, the number of particles having an ink particle size of 5 μm or more and 50 μm or less was counted.

Evaluation of internal splash prevention function Next, two coarse particle counters were installed. At this time, first, one coarse particle counter was installed so that the measuring unit of one coarse particle counter was arranged directly under the shield portion 30A. Further, the other coarse particle counter was installed so that the measurement unit of the other coarse particle counter was arranged at a position 30 cm forward from the measurement unit of the one coarse particle counter.

Next, the deionized water filled in the spray was sprayed from the through hole from the back of the head to the mouth of the doll. Then, the number of floating ink particles was counted by the coarse particle counter. At this time, the number of particles having an ink particle size of 5 μm or more and 50 μm or less was counted.

(Example D2)
A reflectance measurement test, a visibility evaluation test, and a splash prevention functionality evaluation test were performed in the same manner as in Example D1 except that the face shield 10 shown in FIG. 32 was produced.

(Comparative Example D1)
A splash prevention functionality evaluation test was conducted in the same manner as in Example D1 except that the face shield was not attached to the doll.

(Comparative Example D2)
The reflectance measurement test, visibility evaluation test, and the same as in Example D1 except that a commercially available face shield (YF-850L (trade name) manufactured by Yamamoto Optical Co., Ltd.) containing a transparent film was used. A splash prevention functionality evaluation test was conducted.

(Comparative Example D3)
Reflectance measurement test, visibility evaluation test and droplets are the same as in Example D1 except that a commercially available face shield (manufactured by Sharp Corporation, FG-F10M (trade name)) containing a transparent film is used. A preventive functionality evaluation test was conducted.

(Comparative Example D4)
Reflectance measurement test, visibility evaluation test and splash prevention are the same as in Example D1 except that a commercially available face shield (manufactured by Miyamoto Co., Ltd., hallo (trade name)) containing a transparent film is used. A functionality evaluation test was conducted.

The above results are shown in Table 16.

In the visibility column of Table 16 above, "○" indicates that the wearer cannot be seen on the transparent laminated film or the transparent film (hereinafter, simply referred to as a transparent laminated film or the like), and the face shield is attached. It means that it was a hearing result that there was no impression. In addition, "x" indicates that the wearer's reflection on the transparent laminated film etc. can be seen, which hinders the work and gives the impression that the face shield is worn, resulting in a feeling of fatigue. It means that there was.

As a result, as shown in Table 16, in the transparent film of the face shield according to Comparative Example D2 and Comparative Example D3, the reflectances of light having a wavelength of 550 nm were 0.4% and 0.5%, respectively. Further, in the transparent film of the face shield according to Comparative Example D4, the reflectance of light having a wavelength of 550 nm was 8.0%. On the other hand, in the transparent laminated film of the face shield according to Example D1 and Example D2, the reflectance of light having a wavelength of 550 nm was 0.2%. As described above, in the face shield according to Example D1 and Example D2, the reflectance of light having a wavelength of 550 nm could be reduced.

Further, as shown in Table 16, in the visibility evaluation test, in the transparent film according to Comparative Example D4, the reflection of the wearer on the transparent film can be seen, which hinders the work and attaches the face shield. It was a hearing result that I had the impression that I was feeling tired. On the other hand, in Examples D1 and D2, the hearing result was that the image of the wearer on the transparent laminated film 30 was not visible and there was no impression that the face shield was worn. As described above, in the transparent laminated film 30 according to Example D1 and Example D2, the reflection of the wearer on the transparent laminated film 30 can be reduced, and the wearer wearing the face shield 10 is prevented from feeling tired. did it.

Further, as shown in Table 16, in the splash prevention functionality evaluation test, in the face shield according to Comparative Example D2 to Comparative Example D4, when the deionized water was sprayed from the outside, the particles floating near the mouth of the doll were found. The number was about 100 or more. On the other hand, in the face shield 10 according to Example D1, when the deionized water was sprayed from the outside, the number of particles floating in the vicinity of the mouth of the doll was 19. Further, in the face shield 10 according to Example D2, when the deionized water was sprayed from the outside, the number of particles floating in the vicinity of the mouth of the doll was 10. As described above, it was found that the face shield 10 according to Example D1 and Example D2 can effectively protect the wearer from the droplets scattered from the outside.

Further, as shown in Table 16, in the splash prevention functionality evaluation test, in the face shield according to Comparative Example D2 to Comparative Example D4, the number of particles that fell directly under the face shield was about 800 or more. On the other hand, in the face shield 10 according to Example D1, the number of particles that fell directly under the face shield 10 was 62. Further, in the face shield 10 according to Example D2, the number of particles that fell directly under the face shield 10 was 35. As described above, it was found that the face shield 10 according to Example D1 and Example D2 can effectively suppress the scattering of the droplets scattered from the wearer to the surroundings.

Further, as shown in Table 16, in the splash prevention functionality evaluation test, the face shield 10 according to Examples D1 and D2 also has the same face shield 10 as the face shield according to Comparative Examples D2 to D4. The number of particles that fell 30 cm forward was 3 or less. In particular, in the face shield 10 according to Example D2, the number of particles that fell 30 cm forward from the face shield 10 was 0. Therefore, it was found that even in the face shield 10 on which the first lower curved surface 96a and the first upper curved surface 96b are formed, it is possible to suppress the scattering of droplets of a specific size in front of the wearer H of the face shield 10. ..

Next, other specific examples in the above embodiment will be described.

(Example E1)
First, the face shield 10 shown in FIG. 26 was manufactured. At this time, the holding member 200 was manufactured from an aluminum round bar. The diameter of the round bar was 2 mm. Further, in the front view, the ratio (A2 / A1) of the area A2 of the holding member 200 to the area A1 of the shield portion 30A (transparent laminated film 30) was 0.1%.

(1) Visibility evaluation test Next, a visibility evaluation test of the face shield 10 was carried out.

At this time, first, the face shield 10 was attached to the head of the doll. At this time, the holding member 200 of the face shield 10 was observed from a distance of about 1 m to 2 m from the doll in a general indoor environment illuminated by a fluorescent lamp. Then, it was evaluated how much the holding member 200 was recognized.

(2) Tightening property evaluation test In addition, a tightening property evaluation test of the face shield 10 was carried out.

At this time, first, 10 experimenters were randomly selected. Then, the distance between the temples of the experimenter was measured, and the average value was calculated. The average value was about 130 mm. Next, the force required to spread the temple portions 210 in the directions away from each other was measured so that the distance between the tips of the temple portions 210 was 130 mm. A tensile tester (MCT-2150 (product name) manufactured by A & D Co., Ltd.) was used for the measurement. In addition, the experimenter was made to wear the face shield 10, and a hearing was conducted as to whether or not the head felt tight.

(3) Misalignment prevention evaluation test In addition, a misalignment prevention evaluation test was conducted on the face shield 10.

At this time, the face shield 10 was attached to the head of the doll. Then, the horizontal distance from the mouth of the doll to the shield portion 30A was measured. Further, the face shield 10 was repeatedly attached to and detached from the doll 20 times, and the difference between the maximum value and the minimum value of the horizontal distance was calculated.

(Example E2)
Visibility evaluation was carried out in the same manner as in Example E1 except that the holding member shown in FIG. 24 was manufactured, the holding member 200 was manufactured from the acrylic resin round bar, and the diameter of the round bar was 3 mm. A test, a tightening property evaluation test, and a misalignment prevention property evaluation test were performed.

(Comparative Example E1)
Visibility evaluation test, tightening property evaluation test, and misalignment prevention property evaluation in the same manner as in Example E1 except that a commercially available face shield (YF-850L (trade name) manufactured by Yamamoto Optical Co., Ltd.) was used. A test was conducted. Here, in Comparative Example E1, in the tightening property evaluation test, the width of the temporal bone was measured above the ears of the experimenter, and the average value was calculated. The average value was about 130 mm. Next, the force required to spread the holding member was measured so that the distance between the parts corresponding to the temporal bones of the holding member of the face shield was 130 mm.

(Comparative Example E2)
Visibility evaluation test, tightening property evaluation test, and misalignment prevention property evaluation test in the same manner as in Comparative Example E1 except that a commercially available face shield (FG-F10M (trade name) manufactured by Sharp Corporation) was used. Was done.

(Comparative Example E3)
Visibility evaluation test, tightening property evaluation test and misalignment prevention property evaluation in the same manner as in Example E1 except that a commercially available face shield (HIRAX AIR SHIELD (trade name) manufactured by Hiraoka Kogyo Co., Ltd.) was used. A test was conducted.

(Comparative Example E4)
Visibility evaluation test, tightening property evaluation test and misalignment prevention property evaluation test were conducted in the same manner as in Example E1 except that a commercially available face shield (manufactured by Miyamoto Co., Ltd., hallo (trade name)) was used. went.

The above results are shown in Table 17.

In the visibility column of Table 17 above, "○" means that the holding member was inconspicuous and there was no impression that the face shield was attached. Further, "x" means that the hearing result was such that the holding member was conspicuous.

In the tightening property column of Table 17 above, "○" means that the hearing result was such that the head did not feel tightened. In addition, "x" means that it was a hearing result that the head felt tightened.

As a result, as shown in Table 17, in the visibility evaluation test, the holding member was conspicuous in the face shield according to Comparative Examples E1 to E3. On the other hand, in Examples E1 and E2, the hearing result was that the holding member was inconspicuous and there was no impression that the face shield 10 was attached. As described above, in the face shield 10 according to Example E1 and Example E2, the wearing feeling of the face shield 10 could be reduced.

Further, as shown in Table 17, in the tightening property evaluation test, in the face shield according to Comparative Examples E1 to E4, the temple portions are separated from each other so that the distance between the tips of the temple portions is 130 mm. The force required to spread in the direction was 2.0 N or more. On the other hand, in the face shield 10 according to Example E1 and Example E2, the force was 0.1N. Further, in the face shield according to Comparative Example E2 to Comparative Example E4, it was a hearing result that the head holding was felt to be tightened. On the other hand, in the face shield 10 according to Example E1 and Example E2, the hearing result was that the head did not feel tight. As described above, in the face shield 10 according to Example E1 and Example E2, it was possible to prevent the experimenter's head from being tightened by the pair of temple portions 210.

Further, as shown in Table 17, in the misalignment prevention evaluation test, in the face shield according to Comparative Example E2 to Comparative Example E4, the difference between the maximum value and the minimum value of the horizontal distance from the mouth portion of the doll to the shield portion. However, it was 25 mm or more. As described above, when the difference between the maximum value and the minimum value is large, even when the wearer wears the face shield, the effect of blocking the wearer's mouth and nose may differ from those of others. Therefore, the diffusion prevention function of the droplets scattered from the wearer's mouth and nose may not be stable. Further, in some cases, the diffusion prevention function may be deteriorated. On the other hand, in the face shield 10 according to Example E1 and Example E2, the difference between the maximum value and the minimum value of the horizontal distance from the mouth portion of the doll to the shield portion 30A was 10 mm. As described above, in the face shield 10 according to the first and second embodiments, the misalignment of the face shield 10 can be suppressed even when the face shield 10 is repeatedly attached and detached. Therefore, it was found that the face shield 10 according to Example E1 and Example E2 can enhance the diffusion prevention function.

It is also possible to appropriately combine a plurality of components disclosed in each of the above embodiments as necessary. Alternatively, some components may be deleted from all the components shown in each of the above embodiments.

Claims

A transparent laminated film including a front surface antireflection layer constituting the front surface and a back surface antireflection layer constituting the back surface.
The transparent laminated film according to claim 1, further comprising a core layer located between the front surface antireflection layer and the back surface antireflection layer.
The transparent laminated film according to claim 2, wherein the core layer is made of polyethylene terephthalate.
A first transparent adhesive layer that adheres the surface antireflection layer and the core layer,
The transparent laminated film according to claim 2 or 3, further comprising a second transparent adhesive layer for adhering the core layer and the back surface antireflection layer.
The transparent laminated film according to claim 4, wherein the first transparent adhesive layer and the second transparent adhesive layer each contain an acrylic pressure-sensitive adhesive.
The transparent laminated film according to claim 1, further comprising a transparent adhesive layer for adhering the front surface antireflection layer and the back surface antireflection layer.
The transparent laminated film according to claim 6, wherein the transparent adhesive layer contains an acrylic pressure-sensitive adhesive.
The surface antireflection layer has a surface antireflection functional layer arranged in order from the front surface to the back surface, and a surface transparent base material layer.
The transparent laminated film according to any one of claims 1 to 7, wherein the back surface antireflection layer has a back surface antireflection functional layer arranged in order from the back surface to the front surface and a back surface transparent base material layer.
The surface antireflection functional layer is a coating layer coated on the surface transparent base material layer.
The transparent laminated film according to claim 8, wherein the back surface antireflection functional layer is a coating layer coated on the back surface transparent base material layer.
The transparent laminated film according to claim 8 or 9, wherein the front surface antireflection functional layer and the back surface antireflection functional layer are each made of a cured product of an ionizing radiation curable resin composition.
The transparent laminated film according to claim 10, wherein the ionizing radiation curable resin composition contains a (meth) acrylate-based compound.
The surface antireflection functional layer includes a surface refraction layer arranged in order from the front surface to the back surface, and a surface hard coat layer.
The transparent laminated film according to any one of claims 8 to 11, wherein the back surface antireflection functional layer includes a back surface refraction layer arranged in order from the back surface to the front surface and a back surface hard coat layer.
The surface hard coat layer is a coating layer coated on the surface transparent base material layer.
The surface refraction layer is a coating layer coated on the surface hard coat layer.
The back surface hard coat layer is a coating layer coated on the back surface transparent base material layer.
The transparent laminated film according to claim 12, wherein the back surface refractive layer is a coating layer coated on the back surface hard coat layer.
The surface refractive index layer includes a surface low refractive index layer and a surface high refractive index layer arranged in order from the front surface to the back surface.
The transparent laminated film according to claim 12 or 13, wherein the back surface refractive index layer includes a back surface low refractive index layer and a back surface high refractive index layer arranged in order from the back surface to the front surface.
The surface high-refractive index layer includes a first surface high-refractive index layer and a second surface high-refractive index layer arranged in order from the front surface to the back surface.
The transparent laminated film according to claim 14, wherein the back surface high refractive index layer includes a first back surface high refractive index layer and a second back surface high refractive index layer arranged in order from the back surface to the front surface.
The refractive index of the first surface high refractive index layer is higher than the refractive index of the second surface high refractive index layer.
The transparent laminated film according to claim 15, wherein the refractive index of the first back surface high refractive index layer is higher than the refractive index of the second back surface high refractive index layer.
The transparent laminated film according to claim 16, wherein the front surface transparent base material layer and the back surface transparent base material layer contain triacetyl cellulose or polyethylene terephthalate.
The transparent laminated film according to claim 16, wherein the front surface transparent base material layer and the back surface transparent base material layer contain triacetyl cellulose on one side and polyester on the other side.
The transparent laminated film according to claim 16, wherein the front surface transparent base material layer and the back surface transparent base material layer each contain polyester.
The transparent laminated film according to any one of claims 1 to 19, wherein the thickness is 40 μm or more and 500 μm or less.
The transparent laminated film according to any one of claims 1 to 20, which has a restorative function.
The transparent laminated film according to any one of claims 1 to 21, wherein the light reflectance is 1.0% or less and the total light transmittance is 90% or more.
The transparent laminated film according to any one of claims 1 to 22, wherein the transmittance in the ultraviolet region having a wavelength of 380 nm or less is 1.0% or less.
The transparent laminated film according to any one of claims 1 to 23, wherein the bending stress is 6 N / 20 mm or less.
The transparent laminated film according to any one of claims 1 to 24, which is used for a face shield that protects the wearer's face.
An opening is formed in the transparent laminated film, and the transparent laminated film has an opening.
The transparent laminated film according to any one of claims 1 to 25, wherein the opening has a radius of curvature of 0.5 mm or more at all points on the peripheral edge.
The transparent laminated film according to claim 26, wherein the opening has an oval shape, an elliptical shape, or a rounded corner shape.
The transparent laminated film according to any one of claims 1 to 27,
A surface protective film that protects the surface of the transparent laminated film, and
A transparent laminated film with a protective film, comprising a back surface protective film that protects the back surface of the transparent laminated film.
In the face shield that protects the wearer's face
The holding member attached to the wearer and
A face shield comprising the transparent laminated film according to any one of claims 1 to 27, which is attached to the holding member and covers at least a part of the wearer's face.
A transparent laminated film having a front surface and a back surface.
It comprises at least a core layer and a printing layer that covers a part of the front surface side surface of the core layer or a part of the back surface side surface of the core layer.
A transparent laminated film having a visual reflectance Y value of 0.0% or more and 2.0% or less in a region where the print layer is not provided.
The transparent laminated film according to claim 30, wherein in the region where the print layer is not provided, the reflectance of light having a wavelength of 550 nm is 2% or less, and the total light transmittance is 90% or more.
The transparent laminated film according to claim 30 or 31, wherein the transmittance in the ultraviolet region having a wavelength of 380 nm or less is 1.0% or less in the region where the print layer is not provided.
The transparent laminated film according to any one of claims 30 to 32, wherein the core layer contains polyethylene terephthalate.
A surface antireflection layer provided on one side of the core layer and constituting the surface,
Further provided with a back surface antireflection layer provided on the other side of the core layer and constituting the back surface.
The transparent laminated film according to any one of claims 30 to 33, wherein the printing layer is provided between the core layer and the surface antireflection layer.
A surface antireflection layer provided on one side of the core layer and constituting the surface,
Further provided with a back surface antireflection layer provided on the other side of the core layer and constituting the back surface.
The transparent laminated film according to any one of claims 30 to 33, wherein the printing layer is provided between the core layer and the back surface antireflection layer.
A first transparent adhesive layer that adheres the surface antireflection layer and the core layer,
The transparent laminated film according to claim 34 or 35, further comprising a second transparent adhesive layer for adhering the core layer and the back surface antireflection layer.
The transparent laminated film according to claim 36, wherein the first transparent adhesive layer and the second transparent adhesive layer each contain an acrylic pressure-sensitive adhesive.
The surface antireflection layer that constitutes the surface,
The backside antireflection layer that constitutes the back side,
A printing layer provided between the front surface antireflection layer and the back surface antireflection layer and covering a part of the front surface antireflection layer is provided.
A transparent laminated film having a visual reflectance Y value of 0.0% or more and 2.0% or less in a region where the print layer is not provided.
The transparent laminated film according to claim 38, wherein in the region where the print layer is not provided, the reflectance of light having a wavelength of 550 nm is 2% or less, and the total light transmittance is 90% or more.
The transparent laminated film according to claim 38 or 39, wherein the transmittance in the ultraviolet region having a wavelength of 380 nm or less is 1.0% or less in the region where the print layer is not provided.
The surface antireflection layer has a surface antireflection functional layer arranged in order from the front surface toward the back surface, and a surface transparent base material layer.
The transparent laminate according to any one of claims 34 to 40, wherein the back surface antireflection layer has a back surface antireflection functional layer arranged in order from the back surface toward the front surface, and a back surface transparent base material layer. the film.
The surface antireflection functional layer is a coating layer coated on the surface transparent base material layer.
The transparent laminated film according to claim 41, wherein the back surface antireflection functional layer is a coating layer coated on the back surface transparent base material layer.
The transparent laminated film according to claim 41 or 42, wherein the front surface antireflection functional layer and the back surface antireflection functional layer are each made of a cured product of an ionizing radiation curable resin composition.
The transparent laminated film according to claim 43, wherein the ionizing radiation curable resin composition contains a (meth) acrylate-based compound.
The surface antireflection functional layer includes a surface refraction layer arranged in order from the front surface toward the back surface, and a surface hard coat layer.
The transparent laminated film according to any one of claims 41 to 44, wherein the back surface antireflection functional layer includes a back surface refractive layer arranged in order from the back surface toward the front surface, and a back surface hard coat layer.
The surface hard coat layer is a coating layer coated on the surface transparent base material layer.
The surface refraction layer is a coating layer coated on the surface hard coat layer.
The back surface hard coat layer is a coating layer coated on the back surface transparent base material layer.
The transparent laminated film according to claim 45, wherein the back surface refractive layer is a coating layer coated on the back surface hard coat layer.
The surface refractive index layer includes a surface low refractive index layer and a surface high refractive index layer arranged in order from the front surface toward the back surface.
The transparent laminated film according to claim 45 or 46, wherein the back surface refractive index layer includes a back surface low refractive index layer and a back surface high refractive index layer arranged in order from the back surface toward the front surface.
The surface high-refractive index layer includes a first surface high-refractive index layer and a second surface high-refractive index layer arranged in order from the front surface toward the back surface.
The transparent laminated film according to claim 47, wherein the back surface high refractive index layer includes a first back surface high refractive index layer arranged in order from the back surface toward the front surface, and a second back surface high refractive index layer.
The refractive index of the first surface high refractive index layer is higher than the refractive index of the second surface high refractive index layer.
The transparent laminated film according to claim 48, wherein the refractive index of the first back surface high refractive index layer is higher than the refractive index of the second back surface high refractive index layer.
The transparent laminated film according to claim 49, wherein the front surface transparent base material layer and the back surface transparent base material layer contain triacetyl cellulose or polyethylene terephthalate.
The transparent laminated film according to claim 49, wherein the front surface transparent base material layer and the back surface transparent base material layer contain triacetyl cellulose on one side and polyester on the other side.
The transparent laminated film according to claim 49, wherein the front surface transparent base material layer and the back surface transparent base material layer each contain polyester.
The transparent laminated film according to any one of claims 30 to 52, which has a thickness of 40 μm or more and 500 μm or less.
The transparent laminated film according to any one of claims 30 to 53, which has a restorative function.
The transparent laminated film according to any one of claims 30 to 49, which is used for a face shield that protects the wearer's face.
The transparent laminated film according to any one of claims 30 to 55,
A surface protective film that protects the surface of the transparent laminated film, and
A transparent laminated film with a protective film, comprising a back surface protective film that protects the back surface of the transparent laminated film.
In the face shield that protects the wearer's face
The holding member attached to the wearer and
A face shield comprising the transparent laminated film according to any one of claims 30 to 55, which is attached to the holding member and covers at least a part of the wearer's face.
The face shield according to claim 57, wherein the print layer is provided at a position overlapping the cheek of the wearer when viewed from the front.
The face shield according to claim 57 or 58, wherein the distance between the wearer's nose and the holding member is 100 mm or less when the wearer wears the face shield.
The holding member includes a pair of temples that abut on the wearer's ears, a front portion that connects the pair of temples to each other, and a pair that extends downward from the front portion and abuts on the wearer's nose. The face shield according to any one of claims 29 and 57 to 59, which has a pad portion.
The face shield according to any one of claims 29 and 57 to 59, wherein the holding member has a band that covers the wearer's head in a circumferential shape.
The holding member has a chin pad that abuts on the wearer's chin and a pair of hooking portions that are connected to the chin pad and hooked on the wearer's ears. The face shield according to any one of claims 29 and 57 to 59, which covers at least the wearer's chin.
In the face shield that protects the wearer's face
The holding member attached to the wearer and
A transparent laminated film attached to the holding member and covering at least a part of the wearer's face is provided.
The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
A plurality of first notches are formed at least on the lower side thereof.
A first engaging portion is formed on one side of the first cut portion, and a first locking portion for locking the first engaging portion is formed on the other side of the first cut portion.
By locking the first engaging portion to the first locking portion, a first curved surface that curves so as to be convex toward the side away from the wearer is formed in the vicinity of the lower side. Face shield.
A plurality of second notches are formed on the upper side.
A second engaging portion is formed on one side of the second cut portion, and a second locking portion for locking the second engaging portion is formed on the other side of the second cut portion.
By locking the second engaging portion to the second locking portion, a second curved surface that curves so as to be convex toward the side away from the wearer is formed in the vicinity of the upper side. The face shield according to claim 63, wherein the face shield is curved.
By locking the first engaging portion to the first locking portion and locking the second engaging portion to the second locking portion, the first curved surface and the second curvature The face shield according to claim 64, wherein a third curved surface is formed between the surface and the surface so as to be convex toward the side away from the wearer.
The face shield according to claim 65, wherein the third curved surface has a linear shape in a vertical cross section.
In the face shield that protects the wearer's face
The holding member attached to the wearer and
A transparent laminated film attached to the holding member and covering at least a part of the wearer's face is provided.
The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
A first lower panel and a second lower panel arranged along the extending direction of the lower side are provided in the vicinity of the lower side.
A lower fixing panel for fixing the first lower panel and the second lower panel is provided on the upper side of the first lower panel and the second lower panel.
The first lower panel and the second lower panel are separated from each other by a first lower notch portion penetrating the transparent laminated film.
The first lower panel and the lower fixing panel are separated from each other by a second lower notch portion penetrating the transparent laminated film.
The second lower panel and the lower fixing panel are separated from each other by a third lower notch portion penetrating the transparent laminated film.
By fixing the first lower panel and the second lower panel to the lower fixing panel in a state where the first lower panel and the second lower panel are overlapped with each other, the first lower panel and the second lower panel are curved so as to be convex toward the side away from the wearer in the vicinity of the lower side. A face shield on which the first lower curved surface is formed.
A third lower panel and a fourth lower panel arranged along the extending direction of the lower side are provided on the lower side of the first lower panel and the second lower panel.
The third lower panel and the fourth lower panel are separated from each other by a fourth lower notch portion penetrating the transparent laminated film.
The first lower panel and the third lower panel are separated from each other by a fifth lower notch portion penetrating the transparent laminated film.
The second lower panel and the fourth lower panel are separated from each other by a sixth lower notch portion penetrating the transparent laminated film.
By fixing the third lower panel and the fourth lower panel to the lower fixing panel in a state where the third lower panel and the fourth lower panel are overlapped with each other, the third lower panel and the fourth lower panel are convex to the outside of the first lower curved surface toward the side away from the wearer. The face shield according to claim 67, wherein a second lower curved surface is formed so as to be curved.
The face shield according to claim 68, wherein the fourth lower notch portion extends from the lower side.
In the vicinity of the upper side, a first upper panel and a second upper panel arranged along the extending direction of the upper side are provided.
An upper fixing panel for fixing the first upper panel and the second upper panel is provided on the lower side of the first upper panel and the second upper panel.
The first upper panel and the second upper panel are separated from each other by a first upper notch portion penetrating the transparent laminated film.
The first upper panel and the upper fixing panel are separated from each other by a second upper notch portion penetrating the transparent laminated film.
The second upper panel and the upper fixing panel are separated from each other by a third upper notch portion penetrating the transparent laminated film.
By fixing the first upper panel and the second upper panel to the upper fixing panel in a state where the first upper panel and the second upper panel are overlapped with each other, the first upper panel and the second upper panel are curved so as to be convex toward the side away from the wearer in the vicinity of the upper side. The face shield according to any one of claims 67 to 69, wherein the first upper curved surface is formed.
A third upper panel and a fourth upper panel arranged along the extending direction of the upper side are provided on the upper side side of the first upper panel and the second upper panel.
The third upper panel and the fourth upper panel are separated from each other by a fourth upper notch portion penetrating the transparent laminated film.
The first upper panel and the third upper panel are separated from each other by a fifth upper notch portion penetrating the transparent laminated film.
The second upper panel and the fourth upper panel are separated from each other by a sixth upper notch portion penetrating the transparent laminated film.
By fixing the third upper panel and the fourth upper panel to the upper fixing panel in a state where the third upper panel and the fourth upper panel are overlapped with each other, the surface becomes convex to the outside of the first upper curved surface toward the side away from the wearer. The face shield according to claim 70, wherein a second upper curved surface is formed so as to be curved.
The face shield according to claim 71, wherein the fourth upper notch portion extends from the upper side.
The first lower part is fixed by fixing the first lower panel and the second lower panel to the lower fixing panel, and fixing the first upper panel and the second upper panel to the upper fixing panel. The invention according to any one of claims 70 to 72, wherein an intermediate curved surface is formed between the curved surface and the first upper curved surface so as to be convex toward the side away from the wearer. Face shield.
The face shield according to claim 73, wherein the curved surface of the intermediate portion has a linear shape in a vertical cross section.
In the face shield that protects the wearer's face
The holding member attached to the wearer and
A transparent laminated film attached to the holding member and covering at least a part of the wearer's face is provided.
The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
The transparent laminated film is formed with a pair of first mountain folds extending from the upper side and a pair of first valley folds extending from the upper side and provided between the pair of first mountain folds. Ori,
The pair of the first mountain folds extend along the extending direction of the side surface.
The pair of the first valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other from the upper side to the lower side.
By folding the transparent laminated film along the pair of the first mountain fold portions and the pair of the first valley fold portions, the front surface and the upper surface provided above the front surface and folded rearward from the front surface. A face shield that is formed with.
In the face shield that protects the wearer's face
The holding member attached to the wearer and
A transparent laminated film attached to the holding member and covering at least a part of the wearer's face is provided.
The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
The transparent laminated film is formed with a pair of second mountain folds extending from the lower side and a pair of second valley folds extending from the lower side and provided between the pair of second mountain folds. Ori,
The pair of the second mountain folds extend along the extending direction of the side surface.
The pair of the second valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other from the lower side to the upper side.
By folding the transparent laminated film along the pair of the second mountain fold portions and the pair of the second valley fold portions, the front surface and the lower surface provided below the front surface and folded rearward from the front surface. A face shield that is formed with.
The transparent laminated film is formed with a pair of first mountain folds extending from the upper side and a pair of first valley folds extending from the upper side and provided between the pair of first mountain folds. Ori,
The pair of the first mountain folds extend along the extending direction of the side surface.
The pair of the first valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other from the upper side to the lower side.
By folding the transparent laminated film along the pair of the first mountain fold portions and the pair of the first valley fold portions, an upper surface provided above the front surface and folded rearward from the front surface is formed. The face shield according to claim 76.
The transparent laminated film is folded along the pair of the first mountain folds and the pair of the first valley folds, and is folded along the pair of the second mountain folds and the pair of the second valley folds. The face shield according to claim 77, wherein a side surface extending rearward from the front surface is formed on the side surface of the front surface.
The holding member includes a pair of mounting portions for holding the transparent laminated film.
The face shield according to any one of claims 63 to 78, wherein an opening into which the mounting portion is inserted is formed in the vicinity of the pair of side sides of the transparent laminated film.
The face shield according to any one of claims 63 to 79, wherein the holding member holds the transparent laminated film so as to be movable in the vertical direction.
The face shield according to any one of claims 63 to 80, wherein the light reflectance of the transparent laminated film is 1.0% or less.
A transparent laminated film used for a face shield that protects the wearer's face.
It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
A plurality of first notches are formed at least on the lower side thereof.
A first engaging portion is formed on one side of the first cut portion, and a first locking portion for locking the first engaging portion is formed on the other side of the first cut portion.
By locking the first engaging portion to the first locking portion, a transparent first curved surface is formed in the vicinity of the lower side so as to be convex toward the side away from the wearer. Laminated film.
A plurality of second notches are formed on the upper side.
A second engaging portion is formed on one side of the second cut portion, and a second locking portion for locking the second engaging portion is formed on the other side of the second cut portion.
By locking the second engaging portion to the second locking portion, a second curved surface that curves so as to be convex toward the side away from the wearer is formed in the vicinity of the upper side. Item 82. The transparent laminated film.
By locking the first engaging portion to the first locking portion and locking the second engaging portion to the second locking portion, the first curved surface and the second curvature The transparent laminated film according to claim 83, wherein a third curved surface that is curved so as to be convex toward the side away from the wearer is formed between the surface and the surface.
The transparent laminated film according to claim 84, wherein the third curved surface has a linear shape in a vertical cross section.
A transparent laminated film used for a face shield that protects the wearer's face.
It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
A first lower panel and a second lower panel arranged along the extending direction of the lower side are provided in the vicinity of the lower side.
A lower fixing panel for fixing the first lower panel and the second lower panel is provided on the upper side of the first lower panel and the second lower panel.
The first lower panel and the second lower panel are separated from each other by a first lower notch portion penetrating the transparent laminated film.
The first lower panel and the lower fixing panel are separated from each other by a second lower notch portion penetrating the transparent laminated film.
The second lower panel and the lower fixing panel are separated from each other by a third lower notch portion penetrating the transparent laminated film.
By fixing the first lower panel and the second lower panel to the lower fixing panel in a state where the first lower panel and the second lower panel are overlapped with each other, the first lower panel and the second lower panel are curved so as to be convex toward the side away from the wearer in the vicinity of the lower side. A transparent laminated film on which a first lower curved surface is formed.
A third lower panel and a fourth lower panel arranged along the extending direction of the lower side are provided on the lower side of the first lower panel and the second lower panel.
The third lower panel and the fourth lower panel are separated from each other by a fourth lower notch portion penetrating the transparent laminated film.
The first lower panel and the third lower panel are separated from each other by a fifth lower notch portion penetrating the transparent laminated film.
The second lower panel and the fourth lower panel are separated from each other by a sixth lower notch portion penetrating the transparent laminated film.
By fixing the third lower panel and the fourth lower panel to the lower fixing panel in a state where the third lower panel and the fourth lower panel are overlapped with each other, the third lower panel and the fourth lower panel are convex to the outside of the first lower curved surface toward the side away from the wearer. The transparent laminated film according to claim 86, wherein a second lower curved surface is formed so as to be curved.
The transparent laminated film according to claim 87, wherein the fourth lower notch portion extends from the lower side.
In the vicinity of the upper side, a first upper panel and a second upper panel arranged along the extending direction of the upper side are provided.
An upper fixing panel for fixing the first upper panel and the second upper panel is provided on the lower side of the first upper panel and the second upper panel.
The first upper panel and the second upper panel are separated from each other by a first upper notch portion penetrating the transparent laminated film.
The first upper panel and the upper fixing panel are separated from each other by a second upper notch portion penetrating the transparent laminated film.
The second upper panel and the upper fixing panel are separated from each other by a third upper notch portion penetrating the transparent laminated film.
By fixing the first upper panel and the second upper panel to the upper fixing panel in a state where the first upper panel and the second upper panel are overlapped with each other, the first upper panel and the second upper panel are curved so as to be convex toward the side away from the wearer in the vicinity of the upper side. The transparent laminated film according to any one of claims 86 to 88, wherein a first upper curved surface is formed.
A third upper panel and a fourth upper panel arranged along the extending direction of the upper side are provided on the upper side side of the first upper panel and the second upper panel.
The third upper panel and the fourth upper panel are separated from each other by a fourth upper notch portion penetrating the transparent laminated film.
The first upper panel and the third upper panel are separated from each other by a fifth upper notch portion penetrating the transparent laminated film.
The second upper panel and the fourth upper panel are separated from each other by a sixth upper notch portion penetrating the transparent laminated film.
By fixing the third upper panel and the fourth upper panel to the upper fixing panel in a state where the third upper panel and the fourth upper panel are overlapped with each other, the outer side of the first upper curved surface becomes convex toward the side away from the wearer. The transparent laminated film according to claim 89, wherein a second upper curved surface is formed so as to be curved.
The transparent laminated film according to claim 90, wherein the fourth upper notch portion extends from the upper side.
The first lower part is fixed by fixing the first lower panel and the second lower panel to the lower fixing panel, and fixing the first upper panel and the second upper panel to the upper fixing panel. The invention according to any one of claims 89 to 91, wherein an intermediate curved surface is formed between the curved surface and the first upper curved surface so as to be convex toward the side away from the wearer. Transparent laminated film.
The transparent laminated film according to claim 92, wherein the curved surface of the intermediate portion has a linear shape in a vertical cross section.
A transparent laminated film used for a face shield that protects the wearer's face.
It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
A pair of first mountain folds extending from the upper side and a pair of first valley folds extending from the upper side and provided between the pair of first mountain folds are formed.
The pair of the first mountain folds extend along the extending direction of the side surface.
The pair of the first valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other from the upper side to the lower side.
By folding along the pair of the first mountain folds and the pair of the first valley folds, a front surface and an upper surface provided above the front surface and folded rearward from the front surface are formed. Transparent laminated film.
A transparent laminated film used for a face shield that protects the wearer's face.
It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side.
A pair of second mountain folds extending from the lower side and a pair of second valley folds extending from the lower side and provided between the pair of the second mountain folds are formed.
The pair of the second mountain folds extend along the extending direction of the side surface.
The pair of the second valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other from the lower side to the upper side.
By folding along the pair of the second mountain folds and the pair of the second valley folds, a front surface and a lower surface provided below the front surface and folded rearward from the front surface are formed. Transparent laminated film.
A pair of first mountain folds extending from the upper side and a pair of first valley folds extending from the upper side and provided between the pair of first mountain folds are formed.
The pair of the first mountain folds extend along the extending direction of the side surface.
The pair of the first valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other from the upper side to the lower side.
95. The transparent laminated film described.
The front surface is folded along the pair of the first mountain folds and the pair of the first valley folds, and by folding along the pair of the second mountain folds and the pair of the second valley folds. The transparent laminated film according to claim 96, wherein a side surface extending from the front surface to the rear surface is formed on the side surface.
The transparent laminated film according to any one of claims 82 to 97, wherein the reflectance of light is 1.0% or less.
In the face shield that protects the wearer's face
The holding member attached to the wearer and
A transparent laminated film attached to the holding member and covering at least a part of the wearer's face is provided.
The holding member is
A pair of temples including an ear hook that is attached to the wearer's ear,
It has a connecting portion that connects the pair of temple portions to each other from the rear of the wearer.
A face shield in which no other member extending between the pair of temples is arranged in front of the wearer.
99. The pair of temples extend in parallel with each other in front of the ear hook, or extend so that the distance between the pair of temples increases toward the front. Face shield described in.
19. Or the face shield according to 100.
The face shield according to any one of claims 99 to 101, wherein a weight for adjusting the inclination of the temple portion with respect to the horizontal direction is attached to the connecting portion.
The face shield according to any one of claims 99 to 102, wherein the temple portion and the connecting portion are integrally molded.
The face shield according to any one of claims 99 to 102, wherein the connecting portion is provided separately from the temple portion and adjusts the inclination of the temple portion with respect to the horizontal direction.
The face shield according to any one of claims 99 to 104, wherein the holding member is made of a metal rod-shaped member.
The face shield according to claim 105, wherein the metal is aluminum.
The face shield according to any one of claims 99 to 104, wherein the holding member is made of a resin rod-shaped member.
The face shield according to claim 107, wherein the resin is made of a resin selected from polyethylene terephthalate, polycarbonate, and acrylic resin.
The temple portion is provided in front of the ear hook portion and includes a pair of mounting portions for holding the transparent laminated film.
The face shield according to any one of claims 99 to 108, wherein an opening into which the mounting portion is inserted is formed in the transparent laminated film.
The face shield according to any one of claims 99 to 109, wherein the holding member holds the transparent laminated film so as to be movable in the vertical direction.