JP2002205471A - Genuineness identifier, genuineness identifiable information recording medium and article, genuineness identifiable label, and transfer sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable using of a genuineness identifier by enabling identifying by using a suitable means though without enabling observing a forging point, by mastering a manufacturing technique of a person having an illegal intention in a normal state by merely incorporating only reflectivity in a conventional retroreflective sheet. SOLUTION: The genuineness identifier 1 comprises a liquid crystal layer 3 containing a cholesteric liquid crystal pigment having multicolorability depending upon a visual angle, and a transparent fine bead layer 4 made of transparent fine beads having retroreflectivity sequentially laminated on a base 2. The layer 4 may have a transparent adhesive layer as a lower layer and a transparent intermediate layer 7 as an upper layer, and a protective layer 5 laminated as an uppermost layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the present invention, it is difficult to find a method for confirming authenticity from the appearance. Further, the present invention relates to an authenticity identification body which is affixed to various ID cards, high-priced products, and the like, and has a form suitable for identifying authenticity. The present invention relates to an information recording medium in which the above-mentioned authenticity identification body is applied to, for example, an ID card such as a savings card or a credit card, or another information recording medium. The present invention relates to an article in which the above-mentioned authenticity identification body is applied to a high-priced product, a product that is likely to be illegally copied, or a case thereof. The present invention further relates to an authenticity-identifying label or an authenticity-identifying transfer sheet suitable for applying the above-mentioned authenticity identification body to various resin recording media and articles.

[0002]

2. Description of the Related Art Information recording media on which information is recorded include:
(1) A card that generates a monetary value when used, such as a savings card or a credit card, (2) A cash voucher having a face value such as a bill, securities, gift certificate, (3) A stock certificate, a lottery ticket , Or betting tickets, etc., which have a value determined speculatively or by other factors; and (4) a monetary value, such as a passport or identification card, which does not directly generate monetary value but There are things that guarantee qualifications and actions.

[0003] Information recording media as described above have economical or other value, directly or indirectly, so that they are forged to manufacture them with improper intention or discarded when they are genuine or used. There is no end to alterations that make use of what should be done.

As a countermeasure against forgery and falsification, in banknotes and the like, elaborate printing is performed by using a special paper with a watermark and by a printing method using an ink which is specially mixed with an engraved intaglio. Have been. Also, stock certificates, securities,
Alternatively, a gift certificate is also printed using a general-purpose printing method, but according to a bill. In addition, for cards such as savings cards and credit cards, invisible electronic information is recorded in the magnetic stripe, so it is difficult to forge only with visual elements. A hologram seal or the like, which is difficult to apply, is attached to prevent forgery.

[0005] Among them, the hologram seal is often used for the purpose of guaranteeing the authenticity of the object to be stuck, since the production of the hologram involves difficulty. However, the principle of hologram seals is well known, and although the manufacturing technology is advanced, it can be counterfeited by learning the technology. There is a need for an authenticity discriminator based on the.

By the way, a retroreflective sheet in which transparent microbeads are fixed on a sheet such as a film reflects well the illumination light of a car at night, so that it is attached to construction clothes or traffic signs on the side of a road. Attention is given to the driver.

The retroreflective sheet has high decorativeness because it is brilliant in appearance, and is considered to be suitable for application to cards and the like. Since it had only characteristics, it was relatively easy to duplicate an object having the same appearance, and it was not possible to provide a function as an authenticity discriminator.

[0008]

Accordingly, in the present invention, the conventional retroreflective sheet has only the reflectivity, and can be counterfeited by a person who has an illegal intention to learn the manufacturing technique. It is an object of the present invention to make it identifiable by using an appropriate means, though it cannot be observed in a normal state, so that it can be used as an authenticity discriminator.

[0009]

According to the present invention, a conventional retroreflective sheet is provided by disposing a liquid crystal layer exhibiting polychromaticity depending on the viewing angle on the background of transparent fine beads constituting the retroreflective sheet. Although there is no change, by observing through a polarizing plate or by illuminating parallel light,
In the duplication that relies on the appearance, using the fact that it looks different,
It was difficult to get closer to genuine products.

According to a first aspect of the present invention, a liquid crystal layer containing a cholesteric liquid crystal pigment having polychromaticity depending on a viewing angle and a transparent microbead layer composed of transparent microbeads having retroreflective properties are laminated on a substrate. The present invention relates to an authenticity identification body characterized in that: A second invention relates to the authenticity identification body according to the first invention, wherein the liquid crystal layer forms a latent image. A third invention relates to the authenticity identification body according to the first or second invention, wherein the transparent microbead layer is laminated on the liquid crystal layer via a transparent adhesive layer. is there. A fourth invention relates to the authenticity identification body according to any one of the first to third inventions, wherein a transparent protective layer is laminated on the transparent microbead layer. A fifth invention relates to the authenticity identification body according to any one of the first to fourth inventions, wherein the protective layer is laminated on the transparent microbead layer via a transparent intermediate layer. is there. According to a sixth aspect of the present invention, the base of the authenticity identification body according to any one of claims 1 to 5 is a base of an information recording medium on which information is recorded. It is about media. According to a seventh aspect of the present invention, the substrate of the authenticity identification body according to any one of claims 1 to 6 is a medium storing high-priced goods or software, or a packaging container thereof, and is capable of identifying authenticity. It relates to goods. An eighth invention provides a bonding layer made of a transparent resin, a transparent microbead layer made of transparent microbeads having retroreflective properties on a lower surface of the transparent film,
The present invention relates to an authenticity identification label comprising a liquid crystal layer containing a cholesteric liquid crystal pigment having polychromaticity depending on a viewing angle, and an adhesive layer. A ninth invention is directed to a bonding layer made of a transparent resin, a transparent microbead layer made of transparent microbeads having retroreflective properties, and a liquid crystal layer containing a cholesteric liquid crystal pigment having polychromaticity depending on a viewing angle, on the lower surface of the film. And a transfer layer comprising an adhesive layer and an adhesive layer, wherein the transfer layer is releasably laminated to the film. A tenth invention relates to the authenticity discriminating transfer sheet according to the ninth invention, wherein a release layer and / or a protective layer are laminated between the film and the transfer layer. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. As shown in FIG. 1, the authenticity identification body 1 of the present invention has, for example, a liquid crystal layer 3 made of cholesteric liquid crystal or the like laminated on a part of a base material 2, and on the liquid crystal layer 3,
A transparent microbead layer 4 in which a part of the lower side of each of the transparent microbeads is embedded in the liquid crystal layer 3 and densely arranged is laminated.
The protective layer 5 is laminated on the transparent microbead layer 4.

FIG. 1 (a) shows a basic authenticity discriminator 1. In the laminated structure shown in FIG. 1, the protective layer 5 is practically used to protect transparent microbeads. Although it is better to provide them, they can be omitted. Alternatively, in the laminated structure of the authenticity identification body 1 shown in FIG. 1, if the liquid crystal layer 3 is a sheet-like material having strength, the base material 2 can be omitted. It is composed of a laminate with the transparent microbead layer 4.

FIG. 1B is a diagram showing an authenticity discriminator 1 with several layers that are preferably added. The positions where the layers are added are upper and lower positions sandwiching the transparent microbead layer 4. It is. In FIG. 1A, the transparent microbead layer 4 is directly laminated on the liquid crystal layer 3, but as shown in FIG. 1B, the transparent adhesive layer 6 is connected to the liquid crystal layer 3 and the transparent microbeads. It may be laminated between the layer 4. In the case cited in FIG. 1A, the lower part of each transparent microbead of the transparent microbead layer 4 is buried in the liquid crystal layer 3 and is densely arranged, as shown in FIG. 1B. When accompanied by a transparent adhesive layer 6
The lower part of each transparent microbead is buried in the intermediate layer 6 and densely arranged. As described above, the upper surface of the liquid crystal layer 3 can be formed flat through the transparent adhesive layer 6.

In FIG. 1A, the transparent microbead layer 4 is covered with a protective layer 5. From a different point of view, each transparent microbead is provided on the lower surface of the protective layer 5. Partially buried and densely arranged, as shown in FIG. 1 (b), each transparent microbead is densely buried on the lower surface of the transparent intermediate layer 7 made of transparent resin, To form a transparent microbead layer 4, and a protective layer 5 may be laminated on the transparent intermediate layer 7.

As described above, through the transparent intermediate layer 7, the upper surface of the protective layer 5 can be formed flat. Further, when the protective layer 5 is a film such as a transparent film, it is usual to laminate the respective layers with the transparent film as a processing target. First, the transparent intermediate layer 7 on the transparent film.
Is laminated and the transparent microbeads are sprayed on the transparent intermediate layer 7 to form a transparent microbead layer. Therefore, the production with the transparent intermediate layer 7 is easier. This can be said in the production of the authenticity identification label and the authenticity identification transfer sheet described later.

In FIG. 1A, the liquid crystal layer 3 is drawn to be substantially the same size as the transparent fine bead layer 4, but it may be made as such, or at least under the transparent fine bead layer 4. You only have to be part. Further, a portion where the transparent fine bead layer 4 is not formed may be formed on the liquid crystal layer 3.

The liquid crystal layer 3 may be a uniform layer using one type of liquid crystal, but may use two or more types of liquid crystal.
When two or more types of liquid crystals are used, it is of course possible to use a mixture of them. However, by applying each liquid crystal to a separate area, for example, as shown in FIG. 2 (a) or FIG. 2 (b). As described above, the liquid crystal layer A (reference numeral 3a) and the liquid crystal layer B (reference numeral 3)
The liquid crystal layer 3 composed of the separate coating patterns b) may be formed. Further, the formed single liquid crystal layer can be patterned by partially applying light such as ultraviolet light or laser light, heat, or a chemical.

The material of each layer constituting the authenticity identification body 1 of the present invention will be described below. The base material 2 is a plastic sheet if it is a card such as a credit card,
If it is a voucher or identification card, it is paper. Including these,
Examples of the material of the base material 2 include polyester such as polyvinyl chloride, polyvinyl alcohol, polysulfone, and polyethylene terephthalate, polyarylate, polycarbonate, polyamide, polyimide, cellulose diacetate, cellulose triacetate, polystyrene, acryl, polypropylene, polyethylene, and polyolefin. In addition to resins such as vinyl alcohol, metal sheets such as aluminum and copper, paper, and impregnated paper such as resin or latex, etc., alone or composite sheets can be used. When heat resistance is required, a sheet of an amorphous polyester resin, a blend resin of an amorphous polyester resin and a polycarbonate resin, or the like can be used as a material of the base material 2.

The thickness of the substrate 2 varies depending on the material, but is usually in the range of about 10 μm to 5 mm. Particularly, in the case of a magnetic card, when the base sheet conforms to the ISO standard, its thickness is 0.76 mm. When the substrate 2 is formed of a polyvinyl chloride resin (hereinafter, PVC), usually, a white PVC sheet having a thickness of 280 μm is used as a core sheet, two of which are stacked, and a transparent PVC sheet having a thickness of 100 μm is provided on both sides thereof. A four-layer base material (a total thickness of 0.76 mm) is used in which the sheets are stacked as oversheets and stacked by hot pressing or the like.

The liquid crystal layer 3 is preferably formed using a liquid crystal pigment made of cholesteric liquid crystal. A cholesteric liquid crystal exhibits two optical properties of selective reflection and circular polarization when the pitch P (the film thickness required for liquid crystal molecules to rotate 360 °) and the wavelength λ of incident light are substantially equal. The liquid crystal layer 3 may be formed by coating or printing using a coating composition or an ink composition containing a liquid crystal pigment, or may be formed by laminating a sheet made of a liquid crystal-containing plastic or a liquid crystal polymer. Good. Note that two or more types of liquid crystal or liquid crystal pigment can be separately applied to form a pattern. The thickness of the liquid crystal layer 3 is about 0.5 to 50 μm.

The transparent microbeads constituting the transparent microbead layer 4 are preferably made of glass and have a diameter of 10 to 100 μm.
m, preferably microsphere-shaped transparent beads of about 50 μm or less. The transparent microbeads may be made of a resin such as an acrylic resin, a polystyrene resin, or a polyvinyl acetate resin, instead of glass. Normally, in a retroreflective sheet for traffic signs, etc., a half of a colorless and transparent sphere is coated with a reflective metal thin film such as aluminum to enhance reflectivity during illumination. It is desirable to use microbeads that do not have a reflective metal thin film because they use the reflection of the lower liquid crystal layer as the microbeads.

If the transparent fine bead layer 4 is laminated on the liquid crystal layer 3, the transparent fine bead layer 4 can be formed by spraying the transparent fine beads before the liquid crystal layer 3 still loses its tackiness. Spraying is performed uniformly, and only one transparent microbead is required, and it is not preferable that two or more layers are overlapped.
If necessary, the transparent microbeads layer 4 can be formed in a pattern, and the transparent microbeads can be dispersed in a pattern using a pattern mask, or formed into an ink composition using an appropriate binder resin and a solvent. And a known printing method such as screen printing.

Even in the case where the transparent microbead layer 4 has a laminated structure in which the layers other than the liquid crystal 3 are laminated, the previously formed layer is formed by coating or printing, and the layer does not lose its adhesiveness yet. Can be formed by spraying transparent micro beads. When the transparent adhesive layer 6 is under the transparent microbead layer 4 as shown in FIG.
After the formation of the transparent adhesive layer 6, the transparent microbeads are sprayed before the transparent adhesive layer 6 still loses its tackiness. Also,
As described above, when the protective layer 5 is a film such as a transparent film, the transparent intermediate layer 7 is laminated on the transparent film, and the transparent intermediate layer 7 has not lost its tackiness yet. By dispersing the transparent microbeads, the transparent microbeads layer 4 can be formed.

Alternatively, if the transparent microbeads layer 4 is available in the form of a transparent microbeads film already laminated on a film or the like, the transparent microbeads film may be applied by laminating it with another layer. May be.

The protective layer 5 is made of a transparent microbead layer 4 or, except for the protective layer 5, the durability of the uppermost layer, for example, abrasion resistance, solvent resistance, or contamination resistance. In order to improve the durability, when the demand for durability is high, provided by printing or coating using an ink composition or a coating composition containing a thermosetting resin or an ionizing radiation-curable resin as a resin component, It is formed by curing by heating or irradiation with ionizing radiation.

Specific examples of the ionizing radiation-curable resin include:
Polyurethane acrylate, polyester acrylate, epoxy acrylate, polyether acrylate, and the like, which may be used by adding a polyfunctional or monofunctional monomer to adjust the viscosity or crosslink density to each prepolymer, Further, if necessary, a known photoreaction initiator and sensitizer may be added for use. In addition, polyene / thiol-based ionizing radiation curable resins and the like also have excellent abrasion resistance and can be preferably used.

When the protective layer 5 is directly laminated on the transparent micro-bead layer 4 as shown in FIG. 1, it is necessary to fill in the unevenness caused by the arrangement of the transparent micro-beads so that the upper surface becomes flat. It is preferable to increase the thickness, and it is preferable that the thickness is at least １ ／ or more of the diameter of the transparent microbeads.

The transparent adhesive layer 6 has good adhesiveness with the liquid crystal layer 3 and the transparent microbead layer 4, and the transparent microbeads of the transparent microbead layer 4 can be used even if the authenticity discriminator is bent. It is preferable to use a flexible resin so that the resin can be held.

In the same sense, the transparent intermediate layer 7 is
In addition, it is preferable to use a flexible resin for the same reason as the above-mentioned transparent adhesive layer 6 because of good adhesion to the transparent microbead layer 4.

In practice, both the transparent adhesive layer 6 and the transparent intermediate layer 7 can be formed using the same transparent resin. Specifically, the transparent adhesive layer 6 and the transparent intermediate layer 7 are used as binder resins for ink compositions and coating compositions. It can be configured using the transparent resin used. Specifically, rosin-modified maleic resin, nitrocellulose, cellulose acetate, cellulose butyrate acetate, ethyl cellulose, polyamide resin, chlorinated rubber, cyclized rubber, polyamide resin, polyvinyl chloride resin, vinyl chloride / vinyl acetate copolymer resin, Examples include ethylene / vinyl acetate copolymer resin, chlorinated polypropylene, acrylic resin, and polyurethane resin.

The authenticity discriminating body 1 of the present invention described with reference to FIG. 1A or FIG. 1B can be formed by sequentially laminating each layer on a base material 2. In the following manner, the respective layers are generally laminated in reverse order on a thin substrate such as a transparent film, which is easy to handle, to produce a film for forming an authenticity discriminating layer, and the obtained film for forming an authenticity discriminating layer is obtained. It is preferable to laminate each layer on the base material 2 by using.

FIGS. 3A and 3B are diagrams illustrating such an authenticity discriminating layer forming film 10. FIG. One type of the film 10 for forming an authenticity identification layer is shown in FIG.
As shown in (a), a transparent intermediate layer 7, a transparent fine bead layer 4, a transparent adhesive layer 6, a liquid crystal layer 3, and an adhesive layer 8 are sequentially laminated on the lower surface of a transparent film 11. .

In the type shown in FIG. 3A, a transparent intermediate layer 7 is required for laminating the transparent film 11 and the transparent fine bead layer 4, but the transparent adhesive layer 6 is omitted. I can do it. Further, the adhesive layer 8 may not be provided, but when the authenticity discriminating layer forming film 10 is attached to an adherend such as the base material 2, it is possible to omit the application of the adhesive each time. It is preferable that they are stacked.

The authenticity discriminating layer forming film 10 of this type has an authenticity discriminating property suitable for being stacked on the substrate 2 as an adherend with the transparent film 11 facing upward. A label, wherein lamination is performed by applying pressure, preferably by applying pressure while heating.

As shown in FIG. 3B, another type of the film 10 for forming an authenticity identification layer is a transparent film 11.
On the lower surface of FIG. 3, a release layer 12, a protective layer 5, a transparent intermediate layer 7, a transparent fine bead layer 4, a transparent adhesive layer 6, a liquid crystal layer 3, and an adhesive layer 8 are sequentially laminated. (A)
In the structure shown in FIG. 5, a release layer 12 and a protective layer 5 are laminated between a transparent film 11 and a bonding layer 7.
Note that the release layer 12 can be separated from the transparent film 11.

The film 10 for forming an authenticity discriminating layer of this type is laminated on the substrate 2 as an adherend with the transparent film 11 facing upward. Used to peel off and transfer other layers,
This is an authenticity identification transfer sheet. Again, the transfer is performed by applying pressure, preferably while applying heat.

In the authenticity discriminating transfer sheet described with reference to FIG. 3B, the transparent film 11 can be replaced with a film having no transparency. Considering the manufacture and use of
Transparency is preferred because it is easier to handle. Further, the release layer 12 may be omitted as long as each layer (hereinafter referred to as a transfer layer) except the release layer 12 and the transparent film 11 can be separated.

With respect to the protective layer 5, as described above,
It may be omitted. The transparent intermediate layer 7 is preferably provided, but may be omitted if the protective layer 5 can also have the function of the transparent intermediate layer 7. In addition, the protective layer 5 and the transparent intermediate layer 7
If it is not necessary to have advanced functions, the release layer 1
2, the protective layer 5 and the transparent intermediate layer 7 may have the same function, and the protective layer 5 and the transparent intermediate layer 7 may be omitted. The transparent adhesive layer 6 and the adhesive layer 8 can be omitted as in the case described with reference to FIG.

The transparent film 11 has no polarizing property, and has the heat resistance and solvent resistance necessary for sequentially laminating the above layers by coating or the like. When affixing or transferring onto the substrate 2 as an adherend, heat resistance is also necessary, and it is preferable to use a plastic film having these properties, for example, a polyethylene terephthalate film (hereinafter, referred to as a polyethylene terephthalate film). , Simply referred to as PET film), polycarbonate film, polyvinyl alcohol film, polysulfone film, polyethylene film, polypropylene film, polystyrene film, polyarylate film, triacetyl cellulose film, diacetyl cellulose film, or olefin vinyl alcohol. Etc. can be used alcohol copolymer film. The thickness of the transparent film 11 is 5 to
The thickness is preferably 250 μm, more preferably 10 to 50 μm in consideration of workability, tensile strength, thermal efficiency during thermal transfer, and the like.

If necessary, a release layer is formed on the transparent film 11 separately from the release layer 12 so as to adhere to the transparent film 11 and to facilitate peeling of a layer to be subsequently laminated. It may be sex. The release layer, for example,
Wax, silicone resin, or the like is added to a resin having adhesiveness to the film-shaped base material 10 such as a polyester resin. In the case of an authenticity identification body transfer sheet, the transparent film 11 may be replaced with a non-transparent film, but the material is the same as the above-mentioned transparent film material.

The release layer 12 is used to stabilize the adhesive strength between the transparent film 11 and the transfer layer so as to be appropriate, and to release the transfer layer smoothly during transfer. Here, as described above, it is assumed that the material is transferred onto the adherend together with the transfer layer by transfer. In some cases, a release primer layer may be interposed in order to secure the adhesive force between the release layer 12 and the transfer layer.

The release layer 12 is formed of a resin selected from an acrylic skeleton resin such as an acrylic resin, a vinyl chloride / vinyl acetate copolymer, a mixture of cellulose acetate and a thermosetting acrylic resin, a melamine resin, or a nitrocellulose resin. And, if necessary, a resin composition in which polyethylene wax, wax, silicone resin or the like is blended as an additive. Polyester resins can be added to the above resins to adjust the release force, especially to increase the release force. These resins and additives are dissolved or dispersed together with an appropriate solvent and applied as a release layer forming ink composition or coating composition by a known printing means or coating means, and dried by an appropriate means. By solidifying, the release layer 12 can be formed.

The adhesive constituting the adhesive layer 8 includes polyvinyl acetate resin, polyvinyl alcohol, polyvinyl acetal (polyvinyl formal, polyvinyl butyral, etc.), cyanoacrylate, polyvinyl alkyl ether, polyvinyl chloride, polyamide, polymethacrylic acid. Methyl, nitrocellulose, cellulose acetate, thermoplastic epoxy, polystyrene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, urea resin, melamine resin, phenol resin, resorcinol resin, furan resin, epoxy resin, unsaturated polyester resin , Polyurethane resin, polyimide, polyamide imide, polybenzimidazole, polybenzothiazole, etc., or rubber-based natural rubber, recycled rubber, styrene-butadiene , Acrylonitrile - butadiene rubber, chloroprene rubber, butyl rubber, polysulfide rubber, silicone rubber, polyurethane rubber, stereo rubber (synthetic natural rubber), ethylene-propylene rubber, block copolymer rubbers (SBS, SIS, SEBS, etc.) can be used.

The authenticity identification body 1 of the present invention can confirm the authenticity as shown in FIG. 4 or FIG. The authenticity discriminator shown in FIG. 4 has a liquid crystal layer 3 and a transparent microbead layer 4 sequentially laminated on a base material 2, and the liquid crystal layer 3 is completely covered with the transparent microbead layer 4. . The liquid crystal layer 3 is made of cholesteric liquid crystal having a left-handed structure and reflects left-handed circularly polarized light. Under normal scattered light, the upper transparent microbeads layer 4 irregularly reflects illumination light, Although it looks whitish uniformly, the parallel light illumination 13 is perpendicular to the authenticity discriminating object 1, that is, from right above.
By applying substantially parallel light, the point where the light hits 14
Then, the light is reflected on the surface of the liquid crystal layer 3 immediately below the transparent microbead layer 4, and the color of the liquid crystal layer 3 can be visually confirmed. Next, the confirmation of the liquid crystal layer 3 is performed by using the discriminator 15, which converts the linearly polarized light into a circularly polarized light (here, left circularly polarized light) and a linearly polarizing plate that transmits only linearly polarized light. And a quarter-wave plate to be used. By irradiating substantially parallel light from directly above and viewing through the discriminator 15, it can be determined that the liquid crystal layer 3 reflects left circularly polarized light.

The authenticity discriminating body 1 shown in FIG. 5 has a liquid crystal layer 3 and a transparent fine bead layer 4 laminated on a substrate 2 in this order. As described with reference to b), the character string "ABC" is formed as a latent image in the horizontal direction by a different pattern of the liquid crystal layer A (reference numeral 3a) and the liquid crystal layer B (reference numeral 3b). It is. Again, the liquid crystal layer 3 is completely covered with the transparent microbead layer 4. In the authenticity discriminator 1 of FIG. 5 as well, the transparent microbead layer 4 only looks whitish under scattered light, but when substantially parallel light is applied from a right angle direction, the surface of the liquid crystal layer 3 immediately below the transparent microbead layer 4 The character string "A" is reflected by the color of the portions 3a and 3b constituting the liquid crystal layer 3.
BC "and the background can be visually confirmed. When the character string “ABC” is composed of liquid crystal that reflects left circularly polarized light, and the background of the character string “ABC” is composed of liquid crystal that reflects right circularly polarized light, the character string is determined using the same discriminator 15 as in FIG. The column "ABC" can be determined, and at this time, the background portion cannot be confirmed. In addition, by using the discriminating tool obtained by rotating the polarizing plate of the discriminating tool by 90 °, reflection of right circularly polarized light in the background portion can be confirmed. At this time, in the character string “ABC” portion, the right circularly polarized light is reflected. No reflection can be seen. As described above, it can be confirmed that both the character string and the background have predetermined optical properties, and that the authenticity identification body 1 is authentic.

As described above, the latent image may not be formed by applying different liquid crystal layers, but may be formed of one type of liquid crystal layer and a background other than the liquid crystal layer. The light source 13 may be any light source that can be illuminated with substantially parallel light, and may be a flashlight equipped with a reflecting mirror, a headlamp of a motorcycle or a car, or the like. However, a scattered light source, such as a fluorescent light, is less preferred.

The material of the substrate 2 of the authenticity identification body 1 of the present invention is as described above, but these substrates 2 may be substrates of various information recording media. For example, substrate 2
May be a base material of an ID (identification) card.
The ID card may be, for example, a savings card at a bank or the like, a credit card, an identification card (student ID card or employee ID card), but not in a card form, but may be an examination ticket, passport, etc. for ID. . So-called ID information is recorded on these base materials.

The substrate 2 of the authenticity identification body 1 of the present invention
May be a substrate such as a banknote, a gift certificate, a stock certificate, or a security. Information such as the amount of money or the number of units similar thereto is recorded on these base materials. In addition, the base material 2 of the authenticity identification body 1 of the present invention includes a driver's license, a card-type certificate, for example, security such as fire protection, disinfection or fire protection, sanitary qualification,
Alternatively, it may be a substrate such as one showing a grade. Each of these base materials has recorded therein information that is guaranteed or certified. The base material of a winning ballot ticket, a car ticket, etc. such as a lottery ticket, a horse race, a bicycle race, and the like can also be the base material 2 of the authenticity identification body 1 of the present invention. On these base materials, information such as numbers to be drawn is recorded. Both types of information are important if they are fraudulently forged and cause economic damage and confusion.

The base material 2 of the authenticity identification body 1 of the present invention may be a high-end wristwatch, a jewelry item, a precious metal or an antique item, or a box for accommodating them,
It may be a case or a packaging container such as a bag, or may store music software, video software, computer software, or game software in a medium such as a magnetic recording medium or an optical recording medium. It may be a duplicate itself, a box for storing them, or a packaging container such as a case. Because of their high prices, counterfeits and duplicates are easily made with unfair intentions.

The authenticity identification body transfer label or the authenticity identification body transfer sheet of the present invention may be cut in advance according to the shape of the base material 2 to be adhered and the shape of the portion to be applied. . In the case of the authenticity identification body transfer sheet 10, a part other than the transparent film 11 (when a release layer is involved, the release layer is also included in the transparent film 11) is punched out, so-called half-cut. By omitting, from the authenticity identification body transfer sheet 10 of a large size or a wound shape,
Only a transfer layer having a predetermined shape can be applied to the base material 2 as an adherend, and there is an advantage that the authenticity identification body transfer sheet 10 can be handled without being divided.

At this time, only the transfer layer having a predetermined shape may be left, and each layer other than the peelable sheet between adjacent labels may be removed. In this case, the transparent film 11 may be perforated so that each transfer layer can be separated together with the transparent film 11. In the case of the authenticator transfer label 10, the label may be cut in advance into a predetermined shape.

[0052]

According to the first aspect of the present invention, a liquid crystal layer can be easily identified by using a polarizing plate while having a matte feeling on the surface and seeing only a colored layer as a lower layer. By imitating only the appearance, it is possible to provide an authenticity discriminator that is immediately found to be a counterfeit. According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the latent image of the liquid crystal layer is visualized by illuminating with parallel light, authenticity discrimination in which forgery difficulty is further increased. Body can be provided. According to the third aspect of the invention, in addition to the effects of the first or second aspect, the transparent fine bead layer is laminated on the liquid crystal layer via the transparent adhesive layer, so that the liquid crystal layer is Since it can be formed to have a uniform thickness, it is possible to provide an authenticity discriminator in which a discrimination using a polarizing plate or parallel light can be performed more reliably. According to the invention of claim 4, in addition to the effects of any one of claims 1 to 3, it is possible to provide an authenticity identification body in which the durability of the transparent microbead layer is improved. According to the fifth aspect of the present invention, in addition to the effects of any one of the first to fourth aspects, since the transparent microbead layer is laminated on the liquid crystal layer via the transparent adhesive layer, the transparent microbead layer is formed. It is possible to provide an authenticity discriminator in which the adhesion between the protective layer and the protective layer is ensured, and the influence of the unevenness of the transparent microbead layer on the surface of the protective layer is small. According to the invention of claim 6, claim 1 to claim 5
A substrate of the authenticity identifier having the effect of any of the inventions,
Since the base material of the information recording medium having an important record and made for various uses is provided, it is possible to provide an information recording medium capable of identifying authenticity. According to the invention of claim 7, since the base material of the authenticity identification body having the effect of any one of claims 1 to 6 is an article or container in which an unauthorized imitation product or a duplicate product is easily made, An article that can be identified as authentic can be provided. According to the eighth aspect of the present invention, the transparent microbead layer, the liquid crystal layer, and the like are laminated on the lower surface of the transparent film. It is possible to provide an authenticity identification label suitable for producing an article capable of identifying gender. According to the ninth aspect of the present invention, since the transparent microbead layer, the liquid crystal layer, and the like are laminated on the lower surface of the film so as to be peelable, the authenticity identification body, the information recording medium capable of identifying the authenticity, or An authenticity discriminating transfer sheet suitable for producing an article whose authenticity can be discriminated can be provided. According to the tenth aspect of the present invention, in addition to the effect of the ninth aspect, the release layer and / or the protective layer are laminated between the film and the transfer layer. It is possible to provide an authenticity discriminating transfer sheet capable of adjusting the adhesive force between the film and the transfer layer and improving the durability of the surface of the transfer layer after transfer when a protective layer is involved. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic structure of an authenticity identification body of the present invention.

FIG. 2 is a diagram showing a structure of an authenticity identification body in which a liquid crystal layer forms a pattern.

FIG. 3 is a view showing the structure of a film for forming an authenticity identification layer.

FIG. 4 is a diagram showing anti-counterfeiting properties of a liquid crystal layer.

FIG. 5 is a diagram showing anti-counterfeiting properties by a liquid crystal pattern.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Authentic identification body 2 Base material 3 Liquid crystal layer 4 Micro transparent bead layer 5 Protective layer 6 Transparent adhesive layer 7 Transparent intermediate layer 8 Adhesive layer 10 Authentic identification layer forming film 11 Transparent film 12 Release layer 13 Parallel light Lighting 15 Discriminator

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) // B65D 25/20 B65D 25/20 P 33/00 33/00 Z

Claims (10)

[Claims] 1. A liquid crystal layer containing a cholesteric liquid crystal pigment having polychromaticity depending on a viewing angle and a transparent microbead layer comprising transparent microbeads having retroreflective properties are laminated on a substrate. Authenticator. 2. The authenticity identification body according to claim 1, wherein said liquid crystal layer forms a latent image. 3. The authenticity identification body according to claim 1, wherein the transparent microbead layer is laminated on the liquid crystal layer via a transparent adhesive layer. 4. The authenticity identification body according to claim 1, wherein a transparent protective layer is laminated on the transparent microbead layer. 5. The authenticity identification body according to claim 1, wherein the protective layer is laminated on the transparent microbead layer via a transparent intermediate layer. 6. An information recording medium capable of identifying authenticity, wherein the substrate of the authenticity identification body according to claim 1 is a substrate of an information recording medium on which information is recorded. . 7. The authenticity discriminating article according to claim 1, wherein the base material of the authenticity discriminating body is a medium storing high-priced goods or software, or a packaging container thereof. . 8. A liquid crystal containing a bonding layer made of a transparent resin, a transparent microbead layer made of transparent microbeads having retroreflective properties, and a cholesteric liquid crystal pigment having polychromaticity depending on a viewing angle, on the lower surface of the transparent film. An identity discriminating label, characterized in that a layer and an adhesive layer are laminated. 9. A bonding layer made of a transparent resin, a transparent microbead layer made of transparent microbeads having retroreflective properties, a liquid crystal layer containing a cholesteric liquid crystal pigment having polychromaticity depending on a viewing angle, And a transfer layer composed of each layer of an adhesive layer, which is laminated so as to be peelable from the film. 10. Between the film and the transfer layer,
The authenticity discriminating transfer sheet according to claim 9, wherein a release layer and / or a protective layer are laminated.