CN106324716B

CN106324716B - Double-sided structure optical film and manufacturing method thereof

Info

Publication number: CN106324716B
Application number: CN201510397170.2A
Authority: CN
Inventors: 张健
Original assignee: Shine Optoelectronics Kunshan Co Ltd
Current assignee: Shine Optoelectronics Kunshan Co Ltd
Priority date: 2015-07-08
Filing date: 2015-07-08
Publication date: 2021-06-29
Anticipated expiration: 2035-07-08
Also published as: CN106324716A; CN113204062A

Abstract

The application discloses two-sided structure optical film and preparation method thereof, two-sided structure optical film includes: a body comprising a polymer having first and second opposing surfaces; the accommodating mechanism is arranged on the first surface and the second surface and is used for forming an image-text structure on the surface of the body; the body with the accommodating mechanism is of an integral structure. The receiving means comprises a groove. The containing mechanism contains filler to form the graph-text structure. The filler comprises one or more of a conductive material, a coloring material and a dyeing material. The polymer includes a heat curable resin and/or a light curable resin. The light transmittance of the body is more than 0.7. The double-sided optical film and the manufacturing method thereof are beneficial to reducing the thickness of the optical film.

Description

Double-sided structure optical film and manufacturing method thereof

Technical Field

The application relates to the technical field of optical films, in particular to a double-sided structure optical film and a manufacturing method thereof.

Background

The optical film is a modern product integrating an imprinting technology, a micro-nano processing technology and an imaging technology, and has wide market prospect in the fields of touch screens, anti-counterfeiting labels, packaging and the like.

In the field of touch screens, optical films can be used for manufacturing transparent conductive films, for example, the invention patent with application number 201210141850.4, double-sided patterned transparent conductive film and preparation method thereof. The patent adopts an imprinting technology to manufacture groove networks on the upper surface and the lower surface of the middle layer, the transparent conductive film manufactured by the manufacturing method has a three-layer structure, the middle layer is a base material, and the upper surface and the lower surface of the base material are both coated with cured resin and used for imprinting the groove structures.

In the fields of anti-counterfeit labels, packaging and the like, an optical film can generate a dynamic three-dimensional visual effect under a special structure, for example, an invention patent ' micro-optical safety and image representation system ' with application number 200480040733.2, an invention patent ' safety film with a dynamic three-dimensional effect ' with application number 201010180251.4, an invention patent ' anti-counterfeit function packaging film with three-dimensional and dynamic display effects ' with application number 201110266470.9, an invention patent ' film with visual three-dimensional floating images ' with application number 201310229569.0 and a preparation method thereof ' relate to an optical film structure capable of generating a dynamic three-dimensional visual effect, the optical film also has a three-layer structure, an intermediate layer is a base material layer (called as a base material layer or a film body in the above patent), and the upper surface and the lower surface of the base material are coated with a cured resin for imprinting a micro-lens array and a micro-image-text structure.

In the field of touch screens, anti-counterfeit labels, packaging and the like, the optical film adopts a three-layer structure, wherein the base material is used for providing a support platform for the cured resin in the imprinting stage, and because the imprinting mold is separated from the cured resin, the adhesive force between the base material and the cured resin needs to be set to be larger than the adhesive force between the cured resin and the imprinting mold, so that the base material cannot be separated from the cured resin, and the optical film is the fundamental reason that the optical film stays in the three-layer structure in the current stage.

Although optical films have revolutionized our lives, the substrates remain inside each optical film, which increases the thickness of the optical film, thereby reducing the light transmittance of the optical film.

Disclosure of Invention

In view of the defects of the prior art, the present application provides a double-sided optical film and a method for manufacturing the same, so as to facilitate reducing the thickness of the optical film.

To achieve the above object, the present application provides a double-sided structure optical film, comprising:

a body comprising a polymer having first and second opposing surfaces;

the accommodating mechanism is arranged on the first surface and the second surface and is used for forming an image-text structure on the surface of the body;

the body with the accommodating mechanism is of an integral structure.

To achieve the above object, the present application also provides a double-sided structure optical film, including:

a body comprising a first polymer and a second polymer having first and second opposing surfaces;

the adjacent portions of the first polymer and the second polymer are fused to each other so that the body with the receiving mechanism is a unitary structure.

Preferably, the difference in refractive index between the first polymer and the second polymer is less than 0.5.

Preferably, the receiving means comprises a groove.

Preferably, the receiving means contains a filler to form the teletext structure.

Preferably, the filler includes one or more of a conductive material, a coloring material, and a dyeing material.

Preferably, the polymer comprises a thermosetting resin and/or a photocurable resin.

Preferably, the light transmittance of the body is 0.7 or more.

In order to achieve the above object, the present application further provides a method for manufacturing a double-sided optical film, including:

the method comprises the steps of obtaining a primary body which is a polymer and is colloidal at normal temperature and normal pressure;

stamping and forming primary accommodating mechanisms on two opposite surfaces of the primary body by using a stamping device;

and curing the primary body to obtain the double-sided structure optical film with the containing mechanism in an integral structure.

Preferably, the method further comprises the following steps:

and filling fillers into the accommodating mechanism of the double-sided optical film to form an image-text structure.

Preferably, the method further comprises the following steps:

and cutting the double-sided structure optical film into film units with preset sizes.

Preferably, the imprinting step and the curing step include:

stamping and forming a primary accommodating mechanism on the surface of the primary body by using a stamping device;

and simultaneously, curing the primary body to obtain the double-sided structure optical film with the accommodating mechanism in an integrated structure.

In summary, in the technical solution provided by the present application, the body of the double-sided optical film is an integral structure, and the body does not have a substrate therein, and meanwhile, the substrate may not be needed in the manufacturing process, so that the double-sided optical film provided by the embodiment is beneficial to reducing the thickness of the optical film.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view of a two-sided structured optical film provided in accordance with one embodiment of the present disclosure;

FIG. 2 is a schematic view of a two-sided structured optical film filled with fillers according to one embodiment of the present disclosure;

FIG. 3 is a schematic view of a two-sided structured optical film provided in accordance with one embodiment of the present disclosure;

FIG. 4 is a flow chart of a method for manufacturing a double-sided optical film provided in the present application;

FIG. 5 is a schematic view of an imprinting apparatus in an imprinting step of the fabrication method shown in FIG. 4;

FIG. 6 is a flow chart of an imprinting step of the fabrication method of FIG. 4;

FIG. 7 is a flow chart of an imprinting step and a curing step of the fabrication method of FIG. 4;

fig. 8 is a flowchart of the imprinting step and the curing step of the fabrication method of fig. 7.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a double-sided optical film according to an embodiment of the present disclosure includes: a body 1 comprising a polymer having first and second

opposed surfaces

11, 12; the accommodating mechanism 2 is arranged on the first surface 11 and the second surface 12 and is used for forming a graph-text structure on the surface of the body 1; the body 1 with the receiving means 2 is of unitary construction.

When the double-sided optical film is used, as shown in fig. 2, the accommodating mechanism 2 may be filled with materials (objects), such as conductive materials, color materials or other materials, as required, so as to obtain a desired conductive film, an anti-counterfeit label, and the like. Of course, in order to form the main body 1 into an integral structure and have the accommodating mechanism 2 when manufacturing the optical film with the double-sided structure, the embossing and the curing can be performed simultaneously during the manufacturing process, so that the main body 1 with the accommodating mechanism 2 can be directly formed into an integral structure after the curing of the polymer in a colloidal state is finished.

It can be seen that, in the technical solution provided by the embodiment, the body 1 of the double-sided optical film is an integral structure, and the body 1 does not have a substrate, and meanwhile, the substrate may not be needed in the manufacturing process, so that the double-sided optical film provided by the embodiment is beneficial to reducing the thickness of the optical film.

Meanwhile, since the double-sided structure optical film provided by the embodiment has no limitation of the substrate in the prior art, the thickness of the double-sided structure optical film provided by the embodiment can be reduced to a great extent to several micrometers compared with the thickness of the optical film in the prior art.

Meanwhile, because the double-sided structure optical film provided by the embodiment has no base material in the prior art, compared with the three-layer structure optical film in the prior art, the weight of the optical film can be obviously reduced.

Meanwhile, the double-sided structure optical film provided by the embodiment has no base material in the prior art, so that the light transmittance of the optical film can be obviously improved compared with the optical film with a three-layer structure in the prior art.

In the present embodiment, the thickness of the double-sided structured optical film may be 2 to 150 micrometers. When the main body 1 is embossed, the thickness of the main body 1 can be controlled by controlling the amount of the raw material and the pressing force of the embossing device 8 as shown in fig. 5, and the thickness of the main body 1 is reduced as the pressing force is increased, and thus the manufactured double-sided optical film is thinner. At present, electronic products such as mobile phones and computers are used to apply the concept of "ultra-thin", the thickness of the electronic products tends to be thinner and lighter, and the double-sided optical film provided by the embodiment can be used in the screens of the electronic products and controls the extrusion force of the imprinting device 8 according to different requirements, so that the thickness of the double-sided optical film is smaller than 50 micrometers. On the other hand, considering that the double-sided optical film provided in this embodiment may also be attached to the surface of an article for decoration, in order to prevent the attached surface of the article from having a noticeable step feeling after attaching the optical film, the thickness of the double-sided optical film may be made smaller than 40 micrometers or 30 micrometers or less by controlling the amount of polymer used and the pressing force of the pressing device 8.

The body 1 may comprise a polymer structure with any shape, and for practical purposes, the body 1 may be a thin layer shape as a whole, and the thin layer shape may be a flat shape, a wave shape, a random shape, and the like, and preferably, the body 1 may be a solid flat shape. Specifically, the body 1 may be a solid polymer layer, the polymer layer is the polymer, and accordingly, the raw material for manufacturing the body 1 may be a primary body having a polymer layer (colloidal state), and the colloidal polymer layer may be integrally formed after being subjected to imprint curing, so as to form the body 1 having an integral structure. The polymer in the body 1 may be distributed uniformly or non-uniformly. When the polymer is unevenly distributed, a plurality of areas with different densities are formed in the body 1, and the adjacent areas have no interface, i.e. no interface exists in the whole body 1, so as to ensure the light transmittance of the body 1.

It should be noted that the one polymer may include one type of polymer, one polymer, or the one polymer may also include a plurality of types of polymers or a mixed polymer composed of a plurality of polymers, and the embodiment is not limited thereto. Of course, the body 1 is a colloidal primary body before being integrally formed, and the primary body undergoes a transition from a colloidal state to a solid state under heating or irradiation of a heat source or an irradiation source. In view of the fact that the photo-setting resin and the thermosetting resin have good fidelity in forming the graphic structure, and the pattern does not easily affect the shape of the graphic structure due to the tension of the photo-setting resin and the thermosetting resin, it is preferable that the polymer may include the thermosetting resin and/or the photo-setting resin. That is, the one polymer may be a thermosetting resin, a photocurable resin, or a mixture of a thermosetting resin and a photocurable resin. For example, the one polymer may be one UV glue (photosensitive glue), and the one polymer may also be a mixture of UV glues in consideration of various types and kinds of UV glues in practice.

In order to ensure the display effect of the image-text structure of the whole double-sided structure optical film and prevent the influence of the self color of the body 1 on the display of the image-text structure, the light transmittance of the body 1 can be more than 0.7. The transmittance of the body 1 in natural light may be 0.7 or more. Of course, in order to obtain bodies 1 of different colors, the bodies 1 themselves may have a color, for example, the reflectivity of the bodies 1 for yellow light may be controlled to be higher than 0.9, but the transmittance for other colored light is still above 0.7. Under the condition that the body 1 is transparent but has color, the color of the image-text structure is different from the color of the body 1, and the image-text structure can be clearly displayed. Of course, in this embodiment, the light transmittance of the main body 1 to natural light is preferably 0.7 or more.

The first surface 11 and the second surface 12 face away from each other, and the areas of the first surface 11 and the second surface 12 may be much larger than the areas of other side surfaces of the body 1, and of course, the areas of the first surface 11 and the second surface 12 may be the same or different. Preferably, in the present embodiment, the areas of the first surface 11 and the second surface 12 are preferably the same. The first surface 11 and the second surface 12 may be planar structures. Accordingly, the other surfaces of the first surface 11 and the second surface 12 minus the area occupied by the receiving means 2 may be planar.

The receiving means 2 is disposed on the first surface 11 and the second surface 12 of the body 1, and of course, the shape and/or the track of the receiving means 2 on the first surface 11 may be the same as or different from the shape and/or the track of the receiving means 2 on the second surface 12. The housing means 2 is formed by embossing on the surface of the polymer in the colloidal state, the shape of which is not changeable after curing. The shape of the receiving means 2 and the embossed mould are associated with each other, so that moulds of different patterns can be manufactured as desired, and thus a desired pattern of receiving means 2 can be obtained.

The receiving means 2 may be a groove, a recess, or a hole, and in the present embodiment, the receiving means 2 is preferably a groove. The grooves may have regular or irregular shapes, and may also have a grid or curved shape, which is not limited in this application. When the double-sided optical film of the present embodiment is used as a conductive film, it is preferable that the grooves are in a grid pattern, and the grooves have warp and weft lines perpendicular to each other to divide the first surface 11 and the second surface 12 into a plurality of grid regions. When the double-sided optical film of the embodiment is used for manufacturing anti-counterfeit labels and packages, outlines and characters of logos, marks or patterns can be displayed by the tracks of the grooves. Of course, the cross-sectional shape of the accommodating mechanism 2 may be various, and may be semicircular, semi-elliptical or irregular, and the cross-sectional shape of the accommodating mechanism 2 on the same surface may include one or more of U-shape, arc-shape and irregular shape.

The containing mechanism 2 is used for forming a graph structure on the surface of the body 1, and specifically, as shown in fig. 2, the containing mechanism 2 can contain a filler 3 therein to form the graph structure. The graphic structure can be a pattern, character information and track structure. The graphic structures shown on the first surface 11 and the second surface 12 may be different according to the different accommodating means 2 on the first surface 11 and the second surface 12 and the different filling 3. The filling 3 in the containing means 2 can also comprise a plurality of types on the same surface, whereby the displayed pattern can have different colours and patterns.

The filler 3 may include one or more of a conductive material, a coloring material, and a dyeing material. The conductive material can be silver, copper, ITO (indium tin oxide), graphene, or a conductive polymer, and the conductive material is filled in the accommodating mechanism 2 to form the double-sided structure optical thin film into a conductive film, so that the double-sided structure optical thin film can be used for a touch screen of an electronic device such as a mobile phone screen and a computer screen. For example, the conductive material may be nano silver ink, and the filling of the conductive material may be completed by filling the nano silver ink into the accommodating mechanism 2 and then sintering the nano silver ink. The coloring material and the dyeing material are various, and may include, for example, pigment and paint. The filler 3 may be in a liquid or solid state, for example, the conductive material may be nano silver ink, and the coloring material may be nano pigment powder. The filling material 3 is filled into the receiving means 2, and the receiving means 2 may be unfilled, filled just above the upper edge of the receiving means 2. Taking fig. 2 as an example, the filler 3 is in a state of being just filled in the trench, and the upper end surface of the filler 3 is just flush with the upper edge of the trench.

Referring to fig. 3, another embodiment of the present application further provides a double-sided structured optical film, which includes: a body 1 comprising a first polymer 100 and a second polymer 200 having first and second opposing

surfaces

11, 12; the accommodating mechanism 2 is arranged on the first surface 11 and the second surface 12 and is used for forming a graph-text structure on the surface of the body 1; the adjacent portions 150 of the first polymer 100 and the second polymer 200 are fused to each other so that the body 1 having the receiving means 2 is a unitary structure.

In the present embodiment, the body 1 is a cured structure, so the first polymer 100 and the second polymer 200 are both solid. The body 1 may be formed by fusing two solid polymer layers, namely the first polymer 100 and the second polymer 200, adjacent to the portion 150, and accordingly, the raw material for manufacturing the body 1 may be a primary body having two polymer layers in a colloidal state, for example, the first polymer 100 may be formed by curing a first colloidal polymer, and correspondingly, the second polymer 200 may be formed by curing a second colloidal polymer in a colloidal state. The first colloidal polymer and the second colloidal polymer can be of a layered structure before being cured and have certain fusibility. Further, during the extrusion process of the first colloidal polymer and the second colloidal polymer, the polymers of the first colloidal polymer and the second colloidal polymer gradually fuse from the contact portion of the first colloidal polymer and the second colloidal polymer, and expand to the adjacent portion 150 of the first colloidal polymer and the second colloidal polymer. At the same time, the pressing process may be performed simultaneously with the curing process, which finally causes the adjacent portions 150 of the first polymer 100 and the second polymer 200 to fuse with each other, so that the body 1 with the accommodating mechanism 2 is an integral structure, thereby ensuring that the double-sided optical thin surface of the present embodiment also does not need and uses a substrate.

The adjacent parts 150 of the first polymer 100 and the second polymer 200 are fused with each other, so that the fused part of the first polymer 100 and the second polymer 200 does not form an interface, the light transmittance of the whole body 1 is ensured, and the display quality of the double-sided structure optical thin surface is improved. As mentioned above, in order to ensure that the adjacent portions 150 of the first polymer 100 and the second polymer 200 are fused, it is necessary to ensure that the curing is performed while the pressing is performed during the manufacturing process, and certainly, a certain time interval exists between the two, but at least, it is necessary to ensure that the pressing time and the curing time overlap. Further, in order to reduce the influence of the body 1 formed by the first polymer 100 and the second polymer 200 on the optical path of the light and ensure the display effect, the difference between the refractive indexes of the first polymer 100 and the second polymer 200 is less than 0.5.

The first polymer 100 and the second polymer 200 may include one type of polymer, one polymer, or the one polymer may also include a plurality of types of polymers or a mixed polymer composed of a plurality of polymers, which is not limited in this embodiment. Of course, the body 1 is a colloidal primary body before being integrally formed, and the primary body undergoes a transition from a colloidal state to a solid state under heat or irradiation of a heat source or a heat source. Therefore, preferably, the polymer may include a thermosetting resin and/or a photo-curing resin. That is, each of the first and

second polymers

100 and 200 may be a thermosetting resin, a photo-curable resin, or a mixture of a thermosetting resin and a photo-curable resin. For example, the first polymer 100 and the second polymer 200 may be a UV glue (photosensitive glue), and considering that there are various types and kinds of UV glue, the first polymer 100 and the second polymer 200 may also be a mixture of various UV glues.

Referring to fig. 4, a method for manufacturing a double-sided optical film according to an embodiment of the present disclosure includes the following steps.

S1, the obtained material is a colloidal primary bulk of the polymer at normal temperature and normal pressure.

In this step, the primary bulk may be layered as a whole, which may be a polymer layer of colloidal state, which may be a polymer layer having a certain fluidity and having a certain blocking property. The polymer comprises a polymer or a plurality of polymers, the polymer is colloidal at normal temperature and normal pressure, and the polymer is converted into a solid from the colloidal state after the polymer is solidified, and of course, the solid is still maintained at normal temperature and normal pressure.

The polymer in the primary body need not be uniformly distributed, but is, of course, optimally uniformly distributed. When the polymer is non-uniformly distributed, no interface exists in the formed body 1, so that the light transmittance of the body 1 is ensured, and the image-text display effect is not influenced. The primary body may include one layer of polymer (layer), two layers of polymer (layers), or more layers as required, which is not limited in this embodiment.

And S2, stamping and forming primary accommodating mechanisms on the two opposite surfaces of the primary body by using a stamping device.

The two surfaces opposite to each other of the primary body are two side surfaces with the largest area of the primary body, and the areas of the two side surfaces are far larger than the areas of other side surfaces of the primary body. The embossing device 8 can press the primary body and, at the same time, can emboss the primary body with the primary receiving means. By extruding the primary body, the thickness of the primary body can be controlled, while in case the primary body is a multilayer polymer, fusion between polymers of adjacent layers can be facilitated. The imprinting device 8 may be a convex mold with a certain shape track on the end surface, and when in use, the imprinting device 8 is placed on both sides of the primary body or the primary body is input into the imprinting device 8.

The shape track of the primary accommodating mechanism is matched with the projection with the shape track. The primary containment mechanism becomes the containment mechanism 2 after curing, in contrast, the primary containment mechanism is still in a colloidal state and there is still a possibility of deformation. The primary receiving means may be a groove, a recess, or a hole, and in the present embodiment, the primary receiving means is preferably a groove. The grooves may have regular or irregular shapes, and may also have a grid or curved shape, which is not limited in this application. When the double-sided optical film manufactured in the present embodiment is used as a conductive film, it is preferable that the grooves are in a grid pattern, and the grooves have warp and weft lines perpendicular to each other to divide the first surface 11 and the second surface 12 into a plurality of grid regions. When the double-sided optical film manufactured in the embodiment is used for manufacturing anti-counterfeit labels and packages, outlines and characters of logos, marks or patterns can be displayed by the tracks of the grooves. Of course, the cross-sectional shape of the accommodating mechanism 2 may be various, and may be semicircular, semi-elliptical or irregular, and the cross-sectional shape of the primary accommodating mechanism on the same surface may include one or more of U-shape, arc-shape and irregular shape.

Specifically, the imprinting device 8 may include a pressing mold having a preset imprinting structure or at least two rollers having a preset imprinting structure; the preset embossing structure is matched with the primary accommodating mechanism. The pre-embossed structure is the protrusion with the track of a certain shape. The press-fit mold may be two separate plate-shaped molds having the predetermined press-fit structures on the surfaces thereof, and in use, the primary body is placed on one plate-shaped mold, and then the other plate-shaped mold is placed on the primary body, and the force is applied to the plate-shaped molds to press the primary body and form the primary receiving mechanisms on the opposite surfaces of the primary body.

As shown in fig. 5, at least two rollers having a predetermined embossing structure may be disposed at both sides of the primary body during the embossing and generate a pressing force to the primary body. At least two rollers are driven by the driving mechanism to roll, and the rollers can roll continuously, so that compared with a mode of pressing through a plate-shaped die, the mode of pressing through the rollers can accelerate the speed of manufacturing the double-sided optical film to a greater degree. The pre-embossed structure may be provided on the outer circumferential surface of the roller, and may be directly formed by the outer circumferential surface of the roller, for example, by embossing the pre-embossed structure on the outer circumferential surface of the roller, or the pre-embossed structure may be a cylindrical mold which is located on the outer circumferential surface of the cylindrical mold. Different cylindrical molds have different preset embossing structures, and the cylindrical molds are detachably sleeved on the roller. When different types of accommodating mechanisms 2 are needed, only corresponding cylindrical dies need to be replaced.

It should be noted that the primary receiving means on the two opposite surfaces of the primary body may be formed simultaneously or not, for example, when the above-mentioned two plate-like molds are used for imprinting, since the primary body is placed on one plate-like mold and then the other plate-like mold, it can be seen that the primary receiving means on the two surfaces are not formed simultaneously. In addition, when two rollers are used for embossing the primary body, since the primary body is located between at least two rollers and at least two rollers are in simultaneous rolling, it can be seen that the primary receiving means of both surfaces are formed simultaneously.

And S3, curing the primary body to obtain the double-sided structure optical film with the containing mechanism in an integrated structure.

In this step, since the primary body may use a thermosetting resin and/or a photo-curable resin in a colloidal state, the primary body may be irradiated or heated using an irradiation source or a heat source to be cured. For example, when the primary body is a colloidal UV glue, the irradiation source may be an ultraviolet light source.

The curing of the primary body can be carried out simultaneously with the embossing of the primary body, or at intervals, but it is to be noted that the optical film with a double-sided structure can be obtained after the curing is finished, and the embossing cannot be continued at this time. When step S3 is separated from step S2 by a certain time, the partial times of step S3 and step S2 may coincide. No matter the primary body is solidified and the primary body is stamped simultaneously or at intervals, the primary accommodating mechanism can be prevented from generating certain tiny deformation due to the fact that the primary body is not in a solid state, and further the display effect is influenced. Meanwhile, the primary body can be integrally formed into the double-sided structure optical film with an integral structure.

For example, the two plate molds may be permeable to ultraviolet light, i.e., ultraviolet light may pass through the plate molds into the interior thereof. When the two plate-shaped molds are used for imprinting, the primary body can be imprinted firstly, the primary accommodating mechanism is generated on the surface of the primary body, the ultraviolet light can be directly adopted for irradiation at present without removing the two plate-shaped molds, and the two plate-shaped molds are removed after the primary body is completely cured. It can be seen that, in this case, although step S3 is performed after step S2 is performed, both end at the same time.

Therefore, it should be noted that step S3 and step S2 have no obvious starting execution and ending sequence, step S3 and step S2 may start simultaneously or end simultaneously, or step S3 may be executed before step S2 and end later than step S2, or step S3 may start later than step S2 and end later than step S2, or other sequences. Other ways or modifications which can be made by a person skilled in the art without departing from the spirit of the disclosure should be within the scope of the present application.

In a preferred embodiment, the double-sided optical film provided herein further includes the following steps with reference to fig. 4.

And S4, filling filler into the accommodating mechanism of the double-sided optical film to form an image-text structure.

In step S4, the filler 3 may include one or more of a conductive material, a coloring material, and a dye material. The conductive material can be silver, copper, ITO, graphene or conductive polymer, and the conductive material is filled in the accommodating mechanism 2, so that the double-sided optical film is formed into a conductive film, and further can be used for touch screens of electronic equipment such as mobile phone screens and computer screens. For example, the conductive material may be nano silver ink, and the filling of the conductive material may be completed by filling the nano silver ink into the accommodating mechanism 2 and then sintering the nano silver ink. The coloring material and the dyeing material are various, and may include, for example, pigment and paint. The filler 3 may be in a liquid or solid state, for example, the conductive material may be nano silver ink, and the coloring material may be nano pigment powder. The filling material 3 is filled into the receiving means 2, and the receiving means 2 may be unfilled, filled just above the upper edge of the receiving means 2.

Considering that two surfaces of the double-sided optical film have the same or different receiving means 2, the fillers 3 in the receiving means 2 on the same surface may be one or more, and correspondingly, the fillers 3 may be the same or different for the receiving means 2 on the two surfaces, which is not limited in this application.

In another preferred embodiment, referring to fig. 4, the double-sided optical film provided herein further includes the following steps:

and S5, cutting the double-sided structure optical film into film units with preset sizes.

In this step, a cutting tool may be used to cut the double-sided structured optical film, for example, the double-sided structured optical film may be cut into a rectangular or square block shape, a circular shape or an irregular shape, or may be cut according to a specific shape, a specific style or a specific range of a pattern on the double-sided structured optical film. The preset size can be set according to the practical use of the double-sided structure film, for example, the double-sided structure optical film is used for a mobile phone screen, and the current mobile phone screen is mostly 4 inches and 5.5 inches, so that the double-sided structure film can be cut into corresponding sizes. In view of the fact that the accommodating mechanism 2 is disposed on the double-sided optical film, the integrity of the accommodating mechanism 2 needs to be ensured as much as possible during cutting, for example, when the accommodating mechanism 2 is a groove, the situation that a complete section of the groove is divided into two parts needs to be avoided as much as possible.

It should be noted that step S5 and step S4 have no obvious execution sequence, and step S5 may be performed before step S4, that is, the double-sided optical film is cut and then filled with the filler 3; alternatively, step S4 is performed before step S5, that is, the filling filler 3 of the double-sided optical film is cut first, and the present application is not limited thereto.

With continued reference to fig. 5, in one possible embodiment, the imprinting device 8 may include a first roller 81 and a second roller 82 disposed in parallel and spaced apart by a predetermined distance. The preset stamping structure comprises a first preset stamping structure and a second preset stamping structure. The outer circumferential surface of the first roller 81 is provided with the first preset embossing structure, and the outer circumferential surface of the second roller 82 is provided with the second preset embossing structure.

The first and second pre-embossed structures may be identical, which results in the first and

second rollers

81, 82 forming identical primary accommodation mechanisms on both surfaces of the primary body. The first and second preset embossing structures may be different, which allows the first and

second rollers

81 and 82 to form different primary receiving mechanisms on both surfaces of the primary body. The first pre-embossed structure may be directly located on the outer circumferential surface of the first roller 81 by engraving or integral molding, or may be a cylindrical mold sleeved on the outer circumferential surface of the first roller 81. The second preset embossing structure may be directly located on the outer circumferential surface of the second roller 82 by engraving or integral molding, or may be a cylindrical mold sleeved on the outer circumferential surface of the second roller 82.

The first roller 81 and the second roller 82 are arranged in parallel and are spaced at a preset distance, and the thickness of the double-sided structure optical film can be adjusted by regulating and controlling the spaced preset distance between the first roller 81 and the second roller 82. The first roller 81 and the second roller 82 may be disposed horizontally or vertically opposite to each other, that is, the first roller 81 and the second roller 82 may be located on the same horizontal plane or the same vertical plane. Of course, the positional relationship between the first roller 81 and the second roller 82 is not limited to a large extent in the present application, and the first roller 81 and the second roller 82 may be arranged in parallel and spaced apart from each other by a predetermined distance.

Accordingly, referring to fig. 5 and 6, in the present embodiment, the step S2 (the imprinting step) includes the following steps.

S21, inputting the primary body between the first roller and the second roller;

and S22, stamping and forming primary accommodating mechanisms on the two opposite surfaces of the primary body by using the first roller and the second roller.

In step S21, the primary body may be input between the first roller 81 and the second roller 82 at a preset speed, and since the speed of the primary body entering the imprinting device 8 when the first roller 81 and the second roller 82 are horizontally disposed opposite to each other is easily affected by gravity and thus difficult to control, the primary body may be input between the first roller 81 and the second roller 82 by the input pushing mechanism by employing the vertically disposed opposite first roller 81 and the second roller 82.

In step S22, the rolling of the first roller 81 and the second roller 82 during the imprinting process can generate a certain friction force on the primary body to drive the primary body to move, and the first roller 81 and the second roller 82 can continuously imprint the primary body by the input pushing mechanism and the friction force, thereby improving the production efficiency.

Referring to fig. 7, in one embodiment, the steps S2 (the imprinting step) and S3 (the curing step) may include the following steps.

S200, stamping and forming a primary accommodating mechanism on the surface of the primary body by using a stamping device;

and S300, curing the primary body to obtain the double-sided structure optical film with the accommodating mechanism in an integrated structure.

In this embodiment, the step S3 is performed simultaneously with the step S2, that is, the step S200 and the step S300 are performed simultaneously, so that the primary accommodating mechanism can be prevented from being slightly deformed due to the fact that the primary body is not in a solid state, and further, the display effect is prevented from being affected. Meanwhile, the primary body can be integrally formed into the double-sided structure optical film with an integral structure.

Taking the imprinting device 8 as the first roller 81 and the second roller 82 as an example, the first roller 81 and the second roller 82 may be transparent to ultraviolet light, i.e., ultraviolet light may pass through the plate mold and enter between the first roller 81 and the second roller 82, and further irradiate on the primary body. The first roller 81 and the second roller 82 simultaneously press the surface of the primary body while embossing the primary accommodation mechanism, while curing the primary body, ending between the primary body entering the first roller 81 and the second roller 82 starting to cure and its leaving the first roller 81 and the second roller 82. Of course, the moment of starting to solidify the body 1 and the moment of starting to enter between the first roller 81 and the second roller 82 do not necessarily have to be the same, all being considered to be simultaneous within a time interval having a controllable range.

For another example, the primary body may include a first colloidal polymer and a second colloidal polymer.

Accordingly, as shown in fig. 8, the steps S2 (the imprinting step) and S3 (the curing step) may include the following steps.

S201, extruding the first colloidal polymer and the second colloidal polymer to adjacent positions by using an imprinting device to be fused;

s202, simultaneously, stamping and forming the primary accommodating mechanism on the surface of the first colloidal polymer far away from the second colloidal polymer by using a stamping device;

s203, simultaneously, stamping and forming the primary accommodating mechanism on the surface of the second colloidal polymer far away from the first colloidal polymer by using a stamping device;

Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the following claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter of this body 1, nor should the inventors be aware that such subject matter is not considered part of the disclosed subject matter.

Claims

1. A two-sided structured optical film, comprising:

the accommodating mechanism is arranged on the first surface and the second surface and is used for forming a picture and text structure by forming a back filling material on the surface of the body; the filling material is filled into the containing mechanism, so that the containing mechanism can be not filled, just filled or higher than the upper edge of the containing mechanism; the filling material comprises one or more of a conductive material, a coloring material and a dyeing material; the image-text structure is a pattern, character information and track structure;

the first polymer and the second polymer are both thermosetting resin, light-curing resin or a mixture of thermosetting resin and light-curing resin;

the parts of the first polymer and the second polymer, which are contacted with each other, are fused with each other to form adjacent parts, and the adjacent parts do not form an interface so that the body with the containing mechanism is of a unitary structure, and areas with different densities are formed in the body;

the thickness of the double-sided structure optical film is less than 50 micrometers, and the light transmittance of the body is more than 0.7.

2. The two-sided structured optical film of claim 1, wherein: the difference in refractive index between the first polymer and the second polymer is less than 0.5.

3. The two-sided structured optical film of claim 1, wherein: the receiving means comprises a groove.

4. The two-sided structured optical film of claim 1, wherein: the polymer includes a heat curable resin and/or a light curable resin.

5. A method for manufacturing a double-sided optical film is characterized by comprising the following steps:

the method comprises the steps of obtaining a primary body of a polymer which is colloidal at normal temperature and normal pressure, wherein the polymer comprises thermosetting resin and/or light-cured resin, and the colloidal state has fluidity and adhesiveness;

extruding and simultaneously embossing two opposite surfaces of the primary body by using an embossing device to form a primary accommodating mechanism, wherein the embossing device comprises at least two rollers with preset embossing structures, the preset embossing structures are matched with the primary accommodating mechanism, and the thickness of the primary body is controlled by extruding the primary body;

irradiating or heating the primary body by adopting an irradiation source or a heat source, curing the primary body to obtain the double-sided structure optical film with the accommodating mechanism in an integrated structure, wherein at least overlapping of the pressing time and the curing time exists;

6. The method of manufacturing of claim 5, further comprising:

7. The method of claim 5, wherein the imprinting step and the curing step comprise:

the embossing device comprises a first roller and a second roller, the first roller and the second roller are arranged in parallel and are separated by a preset distance, and the separation preset distance between the first roller and the second roller is regulated to realize the regulation of the thickness of the double-sided structure optical film; the polymer is light-cured resin, and the first roller and the second roller are light-permeable in ultraviolet band;