JPH0434538Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] "Industrial Application Field" The present invention relates to a hologram transfer foil, and particularly to a hologram transfer foil for preventing forgery.

``Prior Art'' In recent years, holograms have been used in the publishing and printing industries to prevent counterfeiting of book and magazine covers, illustrations, gifts, novelties, and securities, credit cards, and ID cards.
Furthermore, holograms are being appreciated and used in the fields of advertising and displays due to their iridescent decorative qualities and the interest of their three-dimensional effect.

With its widespread use in such a wide range of fields, it has become necessary to strengthen safety against counterfeiting and tampering, and to have interesting designs. This invention provides designs such as letters and marks on the hologram layer.
It attempts to answer these needs.

By the way, in the conventional technology, after a hologram foil is thermally transferred to the surface of a card, characters, marks, etc. are formed on the surface of the hologram by silk printing or hot stamping. Such conventional methods have the following drawbacks and pose problems in terms of efficiency and quality.

In conventional hologram transfer foils, characters, marks, etc. are formed on the surface of the hologram after the hologram foil is thermally transferred onto the surface of each card, resulting in a low production volume per unit time. Furthermore, since there are positional variations in the hologram itself, it is difficult to accurately provide characters, marks, etc. thereon.
Furthermore, the adhesion between the ink and hot stamp foil and the hologram base material was not sufficient, and when used for a long time, the ink sometimes disappeared or the hot stamp foil peeled off. Furthermore, since the ink or foil builds up by the thickness, it gets caught and causes the ink or foil to peel off. As a result, the aesthetic appearance deteriorated. When heating or pressurizing the hologram to eliminate the bulge, the effect of the hologram was impaired.

"Problems that the invention attempts to solve" This invention was made to solve the above-mentioned conventional problems, and its purpose is to improve work efficiency, work suitability, durability, position accuracy, and aesthetics. To provide a hologram transfer foil whose characters and marks are difficult to falsify or forge and whose peeling is prevented.

[Structure of the invention] "Means for solving the problem" The hologram transfer plate of the present invention for solving the above object includes a support film, a release layer formed on one side of the support film, a protective layer formed on the peeling layer; a hologram forming layer formed on the protective layer and having a relief hologram formed on its surface; It is characterized by comprising a transparent reflective layer made of a substance selected from indium oxide or zinc sulfide, a printed layer formed on the transparent reflective layer, and an adhesive layer formed on the printed layer. do.

"Function" In the hologram transfer foil of the present invention, since the hologram and the characters or marks are integrated, only the hologram needs to be transferred, thus improving work efficiency and suitability. Furthermore, since the hologram and the letters and marks are integrated, the letters and marks will not peel off or disappear, improving durability. Furthermore, since the surface of the hologram and the letters and marks are on the same level, the letters and marks do not peel off from the hologram, which improves the aesthetic appearance. Furthermore, since the hologram and the letters and marks are integrated, it has become difficult to tamper with or forge the letters and marks. Furthermore, since it is no longer necessary to process characters, marks, etc. to match the position of the hologram, positional accuracy is improved.

In addition, as in the present invention, the transparent reflective layer is made of tin oxide,
By using a material selected from titanium oxide, indium oxide, or zinc sulfide, it is possible to obtain a hologram transfer plate with constant light transmittance and stable transparency regardless of unevenness in film thickness. this is,
Since the above-mentioned substance is originally transparent, even if there is unevenness in the thickness of the reflective film, it does not affect the light transmittance, and therefore stable transparency can be exhibited.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a hologram foil according to the present invention. This hologram transfer foil includes a support film 10, a peeling layer 12 formed on one side of the support film 10, a protective layer 14 formed on the peeling layer 12, and a protective layer 14 formed on the protective layer 14. a hologram forming layer 20 on which a relief hologram 18 is formed; a transparent reflective layer 22 formed on the hologram forming layer 20 by vapor deposition; a printed layer 16 formed on the transparent reflective layer 22; It consists of an adhesive layer 24 formed on the printing layer 16.

As the support film 10, heat-resistant polyester film, polypropylene film, cellophane, or the like can be used. The thickness of the support film is preferably about 10 to 50 μm. Among these, polyester film has heat resistance,
The best results can be obtained because it has good physical strength, smoothness, and less stickiness.

The peeling layer 12 is provided to more effectively transfer the hologram layer 26 to the object to be transferred.
It is essential to increase production efficiency. Its materials include thermoplastic acrylic resin,
Chlorinated rubber resins and resins that can be used in combination with this resin include nitrile cellulose, acetyl cellulose, cellulose acetate butyrate, polystyrene,
Vinyl chloride, vinyl acetate resin, etc. can be used. Furthermore, thermosetting resins such as melamine resins, alkyd resins, and epoxy resins can be used alone or in combination, and silicone resins, paraffin waxes, reactive fluororesins, and the like can also be used.

For the protective layer 14, thermoplastic resins or thermosetting resins such as polyester resins, epoxy resins, urethane resins, and vinyl chloride resins, which have excellent heat resistance, scratch resistance, chemical resistance, and transparency, can be used. The appropriate thickness is 1 to 5 μm.

The hologram forming layer 20 is made of a resin that has good embossing properties, does not easily cause uneven pressing, provides a bright reproduced image, has good adhesion to the protective layer 14, and has excellent adhesion to the metal reflective layer 22. required. Examples of resins having these characteristics include acrylic resins having acid values, cellulose acetate butyrate resins, nitrocellulose resins, cellulose acetate propionate resins, ethyl cellulose resins, methyl cellulose resins, and the like. The test results showed that the acrylic resin with an acid value had the best properties. As a method of coating such a hologram-forming resin, there are methods such as roll coating and spray coating of the resin in the form of a paint.
After coating with paint-formed resin, drying, 0.5 ~
Obtain a film thickness of 5.0 μm.

To emboss the hologram 18, the second
Use a press like the one shown in the figure. This press machine has an upper surface plate 30, a lower surface plate 32, and an upper surface plate 3.
0, and a relief type hologram stamper 34 attached to the stamper 34. The relief type hologram stamper 34 is superimposed on the hologram molding resin layer 20, and 90
The hologram 18 is formed on the surface of the resin layer 20 by heating and pressurizing at a temperature of ~150° C. and then cooling. This situation is shown in FIG.

The transparent reflective layer 22 needs to be transparent in order to have a high surface reflectance and transmit information from the printed layer 16. Specifically, it is made of tin oxide, titanium oxide, indium oxide, or zinc sulfide. One substance can be used. The transparent reflective layer 22 can be formed by a commonly known method such as a vacuum evaporation method, a sputtering method, or an ion plating method. The appropriate thickness is in the range of 10 to 10,000 nm.

The printed layer 16 is printed with characters, marks, etc., such as a trade name of a light emitting company. Printing methods include gravure, offset, and silk printing. Among these, gravure printing is the best because it can be rolled up and the print finish is vivid. The printing layer 16 may also be formed of fluorescent ink, such as yttrium phosphor (red light emitting) or zinc sulfide phosphor (green light emitting). If characters, marks, etc. are printed using fluorescent ink in this way, they will be visible even under normal conditions, but they will become colored when irradiated with a Bratz clamp, making counterfeiting and tampering difficult. Furthermore, if characters, marks, etc. are printed using transparent fluorescent ink, they are invisible under normal conditions, but when irradiated with a Bratz clamp, the color develops, creating the effect of hidden characters, making it difficult to forge or tamper with. Become.

The heat-sensitive adhesive layer 24 is made of thermoplastic resin such as polyester resin, acrylic resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, rubber resin, ethylene-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate copolymer resin, etc. Can be used. Any resin is selected from these resins in consideration of adhesiveness with the transparent reflective layer 22 and the material of the coated transfer material. These resins are made into a varnish using an appropriate solvent and then coated with gravure coating, roll coating,
It is formed by coating using a known method such as a blade coating method. The film thickness is preferably 1 to 20 μm. In this way, the hologram transfer foil shown in FIG. 1 is formed.

FIG. 4 shows the state in which the hologram transfer foil obtained in this manner is transferred to an arbitrary transfer material 36 such as paper, a vinyl chloride sheet, a polyester sheet, or the like. That is, the heat-sensitive adhesive layer 2 is applied to the transfer target 36.
4, and apply heat and pressure from the support film side to transfer the heat-sensitive adhesive layer 24 to the transfer target 36.
When the support film 10 is peeled off after adhesion, the transfer is completed.

The present invention is not limited to the above embodiments. Various modifications can be made without departing from the scope of the present invention.

[Effects of the invention] In the hologram transfer foil of the invention, since the hologram and the characters or marks are integrated, only the hologram needs to be transferred, and therefore work efficiency and work suitability are improved. Furthermore, since the hologram and the letters and marks are integrated, the letters and marks will not peel off or disappear, improving durability. Furthermore, since the surface of the hologram and the letters and marks are on the same level, the letters and marks do not peel off from the hologram, which improves the aesthetic appearance. Furthermore, since the hologram and the letters and marks are integrated, it has become difficult to tamper with or forge the letters and marks. Furthermore, since it is no longer necessary to process characters, marks, etc. to match the position of the hologram, positional accuracy is improved.

In addition, since the transparent reflective layer is made of a material selected from tin oxide, titanium oxide, indium oxide, or zinc sulfide, the light transmittance is constant regardless of unevenness in the thickness of the transparent reflective film, resulting in stable see-through. It is possible to obtain a hologram transfer plate having a unique property.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a hologram transfer foil according to an embodiment of the present invention, FIG. 2 is a diagram showing an embossing process for forming a relief-type hologram on the hologram transfer foil, and FIG. 3 is a diagram showing a relief-type hologram. Cross-sectional view of hologram transfer foil embossed with
FIG. 4 is a diagram showing a state when the hologram transfer foil of the present invention is transferred to a transfer target. 10...Support film, 12...Peeling layer, 1
4... Protective layer, 16... Printing layer, 18... Hologram, 20... Hologram forming layer, 22... Metal reflective layer, 24... Adhesive layer, 26... Hologram layer, 30... Upper surface plate , 32...lower surface plate, 34
... Stamper, 36... Transferee.

Claims (1)

[Claims for Utility Model Registration] (1) A support film, a release layer formed on one side of the support film, a protective layer formed on the release layer, and a protective layer formed on the protective layer. a hologram forming layer with a relief hologram formed on its surface; a transparent reflective layer formed by vapor deposition on the hologram forming layer and made of a substance selected from tin oxide, titanium oxide, indium oxide, or zinc sulfide; A hologram transfer plate comprising: a printed layer formed on the transparent reflective layer; and an adhesive layer formed on the printed layer. (2) The hologram transfer plate according to claim 1, wherein the protective layer is made of a thermosetting resin having a thickness of 1 to 5 μm. (3) The hologram transfer plate according to claim 1, wherein the protective layer is made of a thermoplastic resin having a thickness of 1 to 5 μm. (4) The hologram transfer plate according to claim (1), wherein the printing layer is formed by offset printing. (5) Utility model registration claim No. 1, characterized in that the printed layer is formed by gravure printing.
The hologram transfer plate described in (1). (6) Utility model registration claim No. (1) characterized in that the printed layer is formed by silk printing.
Hologram transfer as described in section. (7) Utility model registration claim No. (1) characterized in that the printing layer is formed of fluorescent ink.
Hologram transfer as described in section.