JPH1044694A - Unfairness preventive image display material and transfer sheet used for its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unfairness preventive image display material capable of preventing reuse of an image part or the like after breakdown of the image display material, and a transfer sheet used for its manufacture by a method wherein an image part or the like is prevented from being altered and falsified caused by peeling off, sticking again, etc. SOLUTION: In a transfer sheet wherein an unfairness preventive image display material 1 in which an image receiving layer 2 wherein an image is recorded on at least a part or all faces of a substrate 2, a protective layer, or further a hologram layer are laminated, and the image receiving layer 4 in which heat resistant base sheet, a peelable protective layer 6, a thermal sublimation transfer image or heat melt transfer image can be formed and thermal adhesion to the material to be transferred are provided, or further the hologram layer are provided, an adhesion obstruction layer 5 obstracting interlayer adhesion is provided between any layers thereof. By difference of an exfoliated trace between exfoliation between the adhesion obstruction layer 5 and a layer in contact therewith, and exfoliation in a part of weak adhesion between layers excepting the adhesion obstruction layer 5, reproduction and reuse of the unfairness preventive image display material 1 are difficult, and an unfair practice is easily discovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fraud prevention image display having an image formed on the basis of image data used for an identification card such as an ID card or a portable medium such as a passport, and a transfer sheet used therefor. In particular, the present invention relates to a fraud-preventing image display body having an effective means for identifying fraudulent acts such as forgery, falsification, and tampering, and having excellent decorativeness, and a transfer sheet used for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, there has been an increasing tendency to incorporate a photograph of the owner's face as image information into a card or a portable medium. Cards generally include credit cards, cash cards, membership cards, ID cards, and the like, and portable media include passports, passbooks, and the like. For such cards and portable media, the accuracy of the matching is greatly improved by matching the photograph of the owner's face, and fraudulent acts such as giving psychological restraints to unauthorized users are prevented. Has a certain effect on Japanese Patent Application Laid-Open No. 6-67592 and Japanese Patent Application No. Hei 5-67592 disclose such an image on a medium such as a card.
Japanese Patent Application Laid-Open No. 6-106743 discloses a method for forming the image. Further, as disclosed in Japanese Patent Application Laid-Open No. 6-183184, a hologram or a fluorescent layer is added to a protective sheet disposed on an image to prevent the image from being forged. It was made to be able to confirm visually.

As this image display, as shown in FIG. 12A, an image s is formed on a card base material r such as polyvinyl chloride by a sublimation transfer means or the like, and FIG.
As shown in the figure, a white light reproduction type hologram image t
There is a type in which this hologram is used as a monochromatic light reproducing hologram in order to further prevent forgery or alteration.

An image display having the above structure is disclosed in
As described in JP-A-139024, an image can be formed by transferring and forming an image on an intermediate transfer body having an image receiving layer, and transferring the image from the intermediate transfer body to the transfer receiving body together with the image receiving layer. As described in JP-A-6-71850, there is an intermediate transfer member in which a layer having a hologram is laminated on a part of the intermediate transfer member so that an image formed on the image display member can be recognized through the hologram.

[0005] A transfer body having this hologram needs to be supplied in large quantities and at low cost for commercial use. In particular, embossed duplication is used as a method suitable for the hologram. In this embossed duplication method, a hologram original is exposed to a photoresist to form an uneven relief surface, and this is used as a master to form a hologram made of a synthetic resin or the like using a mold obtained by applying nickel plating to the relief surface. Some models form a hologram image with unevenness by heating and pressing according to the layer, and in recent years, in addition to recording a single hologram image, a relief hologram formed by forming multiple hologram images into one by multiple exposure The use of a plurality of hologram images makes it difficult to forge and deter fraud.

[0006]

However, although it is difficult to copy the hologram itself, it is difficult to forge the hologram, but since the intermediate transfer member on which an image is formed by the above-described transfer method is transferred to a substrate, the resulting image is displayed. There is a possibility of alteration or alteration such as illegally peeling off the intermediate transfer medium from the body from the body to be transferred, changing information such as images, and re-adhering to the original body to be transferred and again to other things. It is required that discrimination against wrongdoing be easy.

Accordingly, the present invention has been made in view of the above circumstances, and has an arrangement in which an adhesion-inhibiting layer for preventing adhesion between layers is provided between layers of a fraud-proof image display and a transfer sheet used for forming the same. In order to prevent alteration or falsification of the image part due to peeling, replacement, etc., and to prevent unauthorized use of the image part after destruction of the image display body, etc. It is an object to provide a transfer sheet.

[0008]

According to a first aspect of the present invention, there is provided a fraud-preventing image display body in which an image receiving layer and a protective layer each having an image recorded on at least a part or the entire surface of a substrate are sequentially laminated. A fraud-preventing image display body, characterized in that an adhesion-inhibiting layer that prevents adhesion between layers is formed between any of the base and the image-receiving layer, and between the image-receiving layer and the protective layer. I do.

[0009] The second according to embodiments fraud image display of the present invention, a part or the entire surface formed by the recording image receiving layer of at least a base material, formed by sequentially laminating a hologram layer, a protective layer not
A positive prevention image display body, characterized in that an adhesion inhibition layer that prevents adhesion between layers is formed between any one of the base material, the image receiving layer, the hologram layer, and the protective layer. .

The transfer sheet used for producing the fraud-proof image display according to the third aspect of the present invention is capable of forming a heat-resistant base sheet, a peelable protective layer, a heat sublimation transfer image or a heat fusion transfer image. A transfer sheet comprising an image-receiving / adhesive layer having thermal adhesiveness to a transfer-receiving material, wherein the peelable protective layer, the sublimation transfer image, and the image-receiving layer have an interlayer adhesive property. It is characterized by forming an adhesion inhibiting layer that hinders.

The transfer sheet used in the manufacture of the fraud-proof image display according to the fourth aspect of the present invention can form a heat-resistant base sheet, a peelable protective layer, a hologram layer, a heat sublimation transfer image or a heat fusion transfer image. A transfer sheet comprising an image receiving layer having thermal adhesiveness to the material to be transferred, and the peelable protective layer, the hologram layer, the sublimation transfer image, on any one of the image receiving layer It is characterized in that an adhesion inhibiting layer for preventing the adhesion between the layers is formed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIGS. 1A and 1B are schematic cross-sectional views of a fraud-preventing image display according to the first invention of the present invention.
FIGS. 3A and 3B are schematic cross-sectional views of a transfer sheet used for producing the fraud-preventing image display of FIGS. 1A and 1B, and FIGS. 3A and 3B are FIGS. FIGS. 4A and 4D are schematic cross-sectional views showing states in which the anti-fraud image display bodies of FIGS. 4A and 4B are peeled between layers, and FIGS. 4A to 4D show anti-fraud image displays according to the second invention of the present invention. FIG. 5 (a) is a schematic sectional view of a body,
4A to 4D are schematic cross-sectional views of each transfer sheet used for producing the fraud-proof image display of FIGS. 4A to 4D, and FIG. 6 is the fraud-proof of FIGS. 4A to 4D. FIG. 7 is a schematic cross-sectional view showing a state in which the image display body is peeled between the layers, and FIG. 7 is a schematic perspective view showing a state in which the fraud prevention image display body of the present invention is peeled between the layers and a specific message is displayed by the peeling layer. FIGS. 8 (a) and 8 (b) are plan views of the fraud-proof image display bodies of the first and second inventions of the present invention, and FIGS. 9 (a) to 9 (d) show the use of a transfer sheet to prevent fraud. FIG. 10 is a conceptual diagram illustrating a manufacturing process of an image display body. FIG. 10 is an explanatory view illustrating a process of manufacturing a fraud-preventing image display body using a transfer sheet. FIGS. FIG. 6 is a schematic cross-sectional view of another configuration of the unauthorized image display according to the first and second aspects of the present invention before and after peeling.

The image forming bodies 1 and 11 for preventing fraud of the present invention are:
As shown in FIGS. 8 (a) and 8 (b), an image 3 such as a face photograph or a name for identifying an individual is displayed, and cards such as credit cards, cash cards, members' cards, ID cards, passports, passbooks and the like are displayed. It is a medium having identifiable information that can be used as a portable medium such as, and is provided with various other images arbitrarily according to the application. (B) is obtained by laminating the hologram image 13 on the image 3.

First, a fraud-preventing image display 1 according to the first aspect of the present invention shown in FIG. 1A has an image receiving layer 4 having an image 3 such as a face photograph formed on a base material 2 and an adhesion inhibiting layer 5. , A peelable protective layer 6 is formed. This fraud-preventing image display 1 is provided with a heat transfer ribbon (see FIG. 10) on a transfer sheet 8 having a heat-resistant base sheet 7, a peelable protective layer 6, an adhesion inhibiting layer 5, and an image receiving layer 4 shown in FIG. k) to form an image 3 such as a picture or a character on the image receiving layer 4, and further, to the transfer destination substrate 2 by a thermal transfer method, each layer other than the heat-resistant base sheet 7 (the peelable protective layer 6, Adhesion inhibiting layer 5, image receiving layer 4,
The image 3 and the like are transferred and formed, whereby the fraud-preventing image display 1 can be manufactured. FIG. 1B is different from FIG. 1A in that the position of the adhesion inhibiting layer 5 is between the image receiving layer 4 and the substrate 2, and the transfer sheet of FIG. The adhesion inhibiting layer 5 is formed on the image receiving layer 4 so as to be transferred to the side. In addition, as shown in FIG. 11A, an adhesion inhibition layer 5 may be provided on the base material 2. In this case, it is not necessary to provide the transfer sheet 8 with the adhesion inhibition layer 5.

Further, the fraud-preventing image display 11 according to the second invention of the present invention shown in FIG. 4A has an image receiving layer 4 in which an image 3 such as a face photograph is formed on a base material 2, a transparent thin film layer. 9, a hologram forming layer 10, an adhesion inhibiting layer 5, and a peelable protective layer 6 are formed. This fraud prevention image display 11 is shown in FIG.
, A heat-resistant base sheet 7, a peelable protective layer 6, a hologram forming layer 10, a permeable thin film layer 9, an adhesion inhibiting layer 5,
An image 3 and the like are formed on the image receiving layer 4 by a thermal transfer ribbon (k in FIG. 10) or the like on the transfer sheet 12 having the image receiving layer 4.
Each layer (the peelable protective layer 6, the hologram forming layer 10, the permeable thin film layer 9, the adhesion inhibiting layer 5, the image receiving layer 4, the image 3, etc.) other than the heat resistant base sheet 7 is transferred by thermal transfer of the transfer sheet 12 to the base material 2. The transfer is formed, and the image display body 11 for preventing fraud is obtained.

4 (b) to 4 (d) show an adhesion inhibiting layer 5 between any one of the substrate 2, the image receiving layer 4, the transparent thin film layer 9, the hologram forming layer 10, and the peelable protective layer 6. 4A shows another configuration of the fraud prevention image display body 11 other than that shown in FIG. 4A. The transfer sheets shown in FIGS. 5 shows a configuration other than FIG. 5A in which an adhesion inhibition layer 5 is formed between any one of the thin film layer 9, the hologram forming layer 10, and the peelable protective layer 6.

Further, as shown in FIG.
The adhesion inhibiting layer 5 may be provided thereon, and in this case, it is not necessary to provide the transfer sheet 12 with the adhesion inhibiting layer 5. In the image forming body 11 shown in FIG.
And a hologram forming layer 10 in which a hologram image is formed on a relief surface formed of fine irregularities. The hologram is not limited to a relief type hologram, and a known hologram generally used may be used. For example, a configuration such as a grating image including a fine diffraction grating, a Lippmann hologram, or the like may be used.

In the present invention, FIGS. 3 (a) and 3 (b) and FIG.
As shown in FIGS. 11A to 11D and FIGS. 11A and 11B, when peeling was performed between any of the fraud-preventing image display bodies 1 and 11, the adhesion inhibiting layer 5 was obtained. Peeling occurs between the layer and the layer in contact therewith, and in other portions, the layer is broken due to peeling at a portion where the adhesive strength between the layers is weak, so that the peeling trace of the portion of the adhesion inhibiting layer 5 and other It is clear from the difference from the peeling trace of the part that the peeling has occurred between any of the layers of the fraud-prevention image display body, and even if it is reproduced or reused based on this, the destruction of the layer due to the peeling And peeling marks become conspicuous, and peeling marks appear on the image and the hologram on the fraud-prevention image forming body, so that these can be visually recognized from the outside. This facilitates the detection of fraud.

The adhesion inhibiting layer 5 can be provided at an arbitrary position on each layer of the image display body for preventing fraud. The adhesion inhibiting layer 5 is formed so that a message such as a character, a numeral, or a mark appears on the peeling mark at the time of peeling. The shape of the adhesion inhibiting layer 5 and the shape of the adhesion inhibiting layer 5 can be formed into a shape such as a character, a number, a mark, or the like. It is necessary to determine the position. As shown in FIG. 7, the adhesion inhibition layer 5 is referred to as “TOPP”.
The letters “AN” are formed in a state of being concealed from the outside before peeling, and “TO” of the adhesion inhibition layer 5 portion after peeling.
Since the characters "PPAN" appear to be prominent, it can be proved that a thermal operation such as falsification or tampering has been performed on the tamper-resistant image forming member after the image forming member has been properly formed. . According to this, since an illegal act can be determined at a glance, it is possible to prevent the damage before it occurs. Further, an adhesion inhibition layer that displays information such as characters and marks such as “VOID”, “invalid”, “illegal”, “forgery”, and “falsified”, or a mark that makes it difficult to recognize an image or hologram 5 may be formed.

The adhesion inhibiting layer 5 is partially provided between any of the layers as described above. The adhesion inhibiting layer 5 inhibits the adhesion between the layers, and is most easily peeled at the time of peeling. Any material having a function of causing destruction between layers may be used due to the difference in adhesiveness between the portions. Specifically, it is necessary to consider the adhesiveness with other layers, but acrylic resin,
Chlorinated rubber resin, epoxy resin, vinyl chloride-vinyl acetate copolymer resin, cellulose resin, chlorinated polypropylene resin, polycarbonate resin, polystyrene resin,
Thermoplastic resin such as polyvinyl chloride resin, unsaturated polyester resin, melamine resin, epoxy resin, urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, polyol (meth) acrylate, melamine (meth) Thermosetting resins such as acrylates and triazine (meth) acrylates, etc., which have poor adhesiveness, silicone resins, or resins mixed with silicone resins, oil silicones, fatty acid amides, zinc stearate or various waxes, or mixtures thereof, Further, a thermoformable material having a radical polymerizable unsaturated group may be used. However, since the peeling is performed between the base sheet of the transfer sheet and the peelable protective layer at the time of thermal transfer, an adhesive force larger than the adhesive strength between the base sheet and the peelable protective layer at the time of thermal transfer is required, and preferably 1i.
300 mm / min. in nch width. It is preferable that the material has a peel strength of 5 g or more under the above peeling conditions, and the material is not limited to the above materials as long as the material satisfies the condition. For example, Table 1 shows the peel strength between the base sheet 12 and the peelable protective layer 6 and the peel strength between the adhesion inhibiting layer 5 and the hologram forming layer 10 in the transfer sheet 12 used in Example 2.

[0022]

[Table 1]

According to this example, if the peel strength between the adhesion-inhibiting layer 5 and another layer is higher than the peel strength between the base sheet 12 and the peelable protective layer 6, the base sheet 12 is peeled off to prevent fraud. When the image display body 11 is transferred and formed, if the layer of the fraud prevention image display body 11 is not broken and the portion transferred and formed from the fraud prevention image display body 11 is illegally peeled off, the adhesion inhibiting layer 5 From the surface.

The above-mentioned materials can be formed on the entire surface or a part of the material, in particular, by various printing methods such as a gravure printing method, an offset printing method and a screen printing method, and various coating methods such as a bar coat and a gravure coat. It can be formed in any shape such as letters, numbers and marks. The thickness of the adhesion-inhibiting layer 5 is only required to show a predetermined peeling strength and is usually hard to be visually recognized from the outer surface of the tamper-proof display member, and is about 0.1 to 20 μm, and preferably 1 μm.

Further, each structure other than the adhesion inhibiting layer 5 will be described in detail. Note that the same reference numerals are given to portions having the same configuration in each of the drawings relating to the above-described image display body and transfer sheet of the present invention. First, the substrate 2 is made of, for example, polyvinyl chloride resin, polyethylene terephthalate resin, polyethylene naphthalate resin, polyester resin, acrylic resin,
Polycarbonate resin, polymethyl methacrylate resin,
Examples include synthetic resins such as polystyrene resin and ABS resin, natural resins, paper, synthetic paper, and the like. These can be used alone or in combination as a composite, and are appropriately selected depending on the application. The thickness is also set according to the application.

The image receiving layer 4 is provided on the transfer sheets 8 and 18, and after forming the image 3 and the like, is transferred to the substrate 2 through a thermal transfer step. It is preferable that the image receiving layer 4 is capable of stably forming the image 3 and has good thermal adhesion to the substrate 2. Details will be described in the following transfer sheet.

Image 3 is composed of a yellow, magenta, cyan sublimable transfer material and / or a black hot-melt transfer material (wax-type transfer material).
Usually, it is arbitrarily formed from these transfer materials which have been made into a thermal transfer ribbon. As described in, for example, JP-A-3-79384 and the like, the sublimation transfer material is sublimated or melt-transferred by heat and penetrates the image receiving layer. For example, a binder and a dye are used as main components, and Resins mainly containing a crosslinked product of polyvinyl alcohol such as polyvinyl acetal and polyvinyl butyral. Examples of dyes include diarylmethane, triarylmethane, thiazole, methine, azomethane, xanthene, axazine, and thiazine. System, azine system, acridine system, azo system, spirodipyran system, isodinospiropyran system, fluoran system, rhodamine dactam system and anthraquinone system. The heat-fusible transfer material is a material that is melted by heat and fused to the image receiving layer, and includes, for example, a wax layer and a heat transfer layer. Waxes include plant waxes such as candelilla wax, carnauba wax, rice wax, and wax, animal waxes such as beeswax, lanolin, and whale wax, petroleum waxes such as montan wax and petrolatum, and polyethylene as a synthetic wax. Synthetic hydrocarbons such as waxes, modified waxes such as montan wax derivatives, hydrogenated waxes such as hardened castor oil, lauric acid, balmitic acid, myristic acid,
There are fatty acids such as stearic acid, and waxes such as fatty acid amides, fatty acid anilides, and imido waxes. Examples of resins include acrylic, styrene, rosin, vinyl, acetal, and rubber resins.

The hot-melt transfer material is, for example, a saturated polyester resin, polyvinyl chloride, polyvinyl chloride-based resin such as polyvinyl chloride-vinyl acetate, polymethyl acrylate,
Polyacrylic acid-2-naphthyl, polymethyl methacrylate, polyethyl methacrylate, polymethacrylic acid-t-
Butyl, polyphenyl methacrylate, copolymer of methyl methacrylate and alkyl methacrylate (however, alkyl group has 2 to 6 carbon atoms) Acrylic resin such as polymethylchloroacrylate, acrylic-styrene copolymer, polystyrene, polydivinyl Resins of vinyl resins such as benzene, polyvinyl toluene, styrene-butadiene copolymer, and coloring agents such as titanium oxide, calcium carbonate, Hansa Yellow, Oil Em 2G, Oil Black, Pyrazolone Orange, Oil Red, Bengala, Anthraquinone Violet, and Phthalocyanine Blue , Aluminum powder, bronze powder, pearl essence, magnetic powder, carbon black and the like.

Further, as shown in FIG. 2A, the transfer sheet 8 on which these images 3 of the fraud-preventing image display 1 are formed once is formed on a heat-resistant base sheet 7 as a support by a peelable protective layer. 6, an adhesion inhibiting layer 5, and an image receiving layer 4 are provided, and as shown in FIG.
Transfer sheet 12 on which these images 3 are once formed
Has a peelable protective layer 6, an adhesion inhibiting layer 5, a hologram forming layer 10, a transparent thin film layer 6, and an image receiving layer 4 provided on a heat-resistant base sheet 7 as a support. The heat-resistant base sheet 7 is a sheet having heat resistance without softening and deformation due to heat and pressure during thermal transfer. Examples thereof include a polyethylene terephthalate film, a polyethylene naphthalate film, polyvinyl chloride, polyester, polycarbonate, polymethacrylic acid. Examples thereof include synthetic resins such as methyl and polystyrene, natural resins, paper, synthetic paper, and the like, which can be used alone or in combination as a composite. The thickness of the heat-resistant base sheet 7 is 2 to 50 μm.

The peelable protective layer 6, together with the image receiving layer 4, is peeled off from the heat-resistant base sheet 7 when transferred to the base 2 of the image display members 1 and 11 to prevent fraud. Since the image display bodies 1 and 11 are exposed to the outside, the underlying image receiving layer 4, hologram forming layer, and the like may have a function of protecting against chemical damage and mechanical damage due to penetration of chemicals and solvents. It is necessary to use a mixture of a thermoplastic resin and an anti-friction agent in order to provide both functions.

The thermoplastic resin prevents the penetration of chemicals such as plasticizers, acids, alkalis, alcohols, and kerosene,
This suppresses the occurrence of scratches due to scratching. For example,
Examples include polymethyl methacrylate, epoxy resin, thermoplastic acrylic resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, cellulose resin, and chlorinated polypropylene resin. These polymethyl methacrylates and epoxy resins have excellent plasticizer resistance among existing thermoplastic resins, and are substances that can be easily peeled off from the heat-resistant base sheet 11. The plasticizer is contained in a soft vinyl sheet, a plastic eraser, or the like, and has an adverse effect such that when the plasticizer comes into contact with the plastic sheet, it migrates to the image surface and causes fading of the image.

The anti-friction agent improves abrasion resistance and scratch resistance, and includes, for example, Teflon powder; polyethylene powder; animal wax, plant wax,
Natural wax such as mineral wax and petroleum wax; synthetic hydrocarbon wax, aliphatic alcohol and acid wax, fatty acid ester and glycerite wax, hydrogenated wax, synthetic ketone wax, amine and amide wax, chlorination Synthetic wax such as hydrocarbon wax, synthetic animal wax, and α-olein wax; and metal salts of higher fatty acids such as zinc stearate.

The mixing ratio of the thermoplastic resin and the anti-friction agent is 85 to 95 parts by weight per 100 parts by weight of the thermoplastic resin.
It is preferable that the amount of the anti-friction agent be 5 to 15 parts by weight.
Further, the coating amount of the peelable protective layer 6 is preferably about 1 to 3 g / m ² .

The release protective layer 6 may further contain a release improver such as a linear saturated polyester resin for improving the cuttability of the transfer portion from the transfer sheet during thermal transfer. This mixing ratio is 0 to 3 with respect to 100 parts by weight.
Desirably about parts by weight. Note that it is desirable that no other additive such as an ultraviolet absorber be added to the release layer. These additions cause a decrease in chemical resistance, a penetration of chemicals such as plasticizers and solvents, and a deterioration in mechanical strength.

The method for forming the peelable protective layer 6 is as follows.
It is formed by applying and drying the heat-resistant base sheet 7 using a known coating means such as a gravure coat, a roll coat, and a bar coat.

The image receiving layer 4 forms an image 3 by a thermal transfer means using a thermal transfer ribbon (not shown) having a sublimable or hot-melt transfer material or the like. The image receiving layer 4 on which the image 3 is formed is bonded to the image display body 1, 1
1 is a part of the first embodiment. That is, for the image receiving layer 4, a thermoplastic resin capable of forming an image made of a sublimable or heat-fusible transfer material by a thermal transfer unit and having thermal adhesion to the substrate 2 is used.

When the thermal melting temperature of the thermoplastic resin is low, a part of the thermoplastic resin of the image receiving layer 4 may be thermally fused (transferred) to a thermal transfer ribbon (not shown).
In order to prevent this, it is conceivable to use a thermoplastic resin having a high heat melting temperature. However, a heat roll, a hot plate in a heat transfer step of transferring the image receiving layer 4 on which the image 3 of the transfer sheet 12 is formed to the base material 2 are considered. It is necessary to set a high temperature setting of the heating means such as. However, there is a problem that the high temperature causes deterioration (fading) of the image 3 made of a sublimable dye or the like and thermal damage to the substrate 2. An image receiving layer 4 is formed on a thermal transfer ribbon (not shown).
It is conceivable that an additive such as silicon is mixed into the image receiving layer 4 in order to reduce the adhesiveness of the image receiving layer 4 in order to prevent heat fusion of the image receiving layer 4, but the adhesiveness of the image receiving layer 4 to the substrate 2 is deteriorated. There's a problem. In this case, the problem can be solved by setting the glass transition point of the thermoplastic resin to 50 ° C. or higher and adding the filler to form the image receiving layer 4.

The thermoplastic resin used for the image receiving layer 4 preferably has a glass transition point (Tg) of 130 ° C. or less. The temperature at the time of thermally transferring the layer 4 to the substrate 2 needs to be high, and the substrate 2 such as a card may be deformed by heat.

Examples of such a thermoplastic resin include polyesters such as linear saturated polyesters, vinyl chloride resins such as polyvinyl chloride and vinyl chloride-vinyl acetate copolymer resin, polyacrylic acid, and polyacrylic acid-2. -Methoxyethyl, polymethyl acrylate, polyacrylsan-2-naphthyl, isobornyl polyacrylate, polymethacrylomethyl, polyacrylonitrile, polymethylchloroacrylate, polymethyl methacrylate, polyethyl methacrylate, polymethacrylate-tert -Acrylic resins such as butyl, polybutyl methacrylate, polyphenyl methacrylate, copolymer resins of methyl methacrylate and alkyl methacrylate (wherein the alkyl group has 2 to 6 carbon atoms), polystyrene, polydivinylbenzene, polyvinyl Benze , Styrene - butadiene copolymer resin, styrene-alkyl methacrylate (carbon number of wherein the alkyl group is 2-6) include vinyl resins such as.

Further, when the image 3 is formed by a thermal head using a thermal transfer ribbon (not shown) on the surface of the image receiving layer 4, the main component of the image receiving layer 4 is made of a thermoplastic resin. Since the image receiving layer 4 is thermally fused to the dye layer of the thermal transfer ribbon (not shown) and the image 3 becomes unclear, a filler having an anti-blocking property in the thermoplastic resin for preventing the thermal fusion, particularly the thermal melting temperature ( (In the case of an organic filler, a softening point or a decomposition point, and in the case of an inorganic filler, a melting point) An inorganic or organic filler having a temperature of 200 ° C. or more is added.

Examples of such an organic filler include polytetrafluoroethylene fine particles, starch, silicone resin fine particles, polyacrylonitrile-based fine particles, and cured resin fine particles made from benzognamine resin and melamine resin. Examples of the zero-free filler include calcium carbonate, talc, kaolin, zinc oxide, titanium oxide, silicon oxide, aluminum hydroxide, and magnesium oxide.

The mixing ratio of the thermoplastic resin and the filler may be in the range of 1 to 200 parts by weight of the filler with respect to 100 parts by weight of the thermoplastic resin. The method for coating the image receiving layer 4 is to first form the image receiving layer composition into a coating with a suitable solvent, and then apply and dry the coating using a known coating means such as gravure coating, roll coating, bar coating, and the like. . Application amount is 1
３3 g / m ² .

Further, in order to prevent discoloration of the dye constituting the image 3 due to light, the maximum absorption wavelength of 250 to
A 400 nm ultraviolet absorber may be added. Examples of such an ultraviolet absorber include phenyl salicylate, p-tert-butylphenyl salicylate, p-
Salicylic acid-based ultraviolet absorbers such as octylphenyl salicylate, 2,4-dihydroxybenzophenone, 2-hydroxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2′-dihydroxy- 4-methoxybenzophenone, 2,2'-dihydroxy-4,
4'-dimethoxybenzophenone, 2-hydroxy-4
Benzophenone-based ultraviolet absorbers such as -methoxy-5-sulfobenzophenone, 2- (2'-hydroxy-5'-
Methylphenyl) benzotriazole, 2- (2′-hydroxy-5′-tert-butylphenyl) benzotriazole, 2- (2′-hydroxy-3′-tert)
-Butyl-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-ditert
-Butylphenyl) -5-chlorobenzotriazole,
Benzotriazole ultraviolet absorbers such as 2- (2'-hydroxy-3 ', 5'-ditert-amylphenyl) benzotriazole, 2-ethylhexyl-2-cyano-3,3'-diphenylacrylate, ethyl-2 And cyanoacrylate-based ultraviolet absorbers such as -cyano-3,3-diphenylacrylate.

The proportion of the ultraviolet absorber may be in the range of 5 to 40 parts by weight based on 100 parts by weight of the mixture comprising the thermoplastic resin and the filler.

The hologram forming layer 10 used for the image forming body 11 of the second invention is a surface relief type hologram composed of a fine uneven pattern, and further provided with a transparent thin film layer 9. The hologram forming layer 10 is preferably made of a resin having good embossing properties, hardly causing press unevenness, a bright reproduced image, and good adhesion to the peelable protective layer and the transparent thin film layer. For example, thermoplastic resins such as vinyl chloride-vinyl acetate copolymer, urethane resin, polycarbonate resin, polystyrene resin and polyvinyl chloride resin, unsaturated polyester resin, melamine resin, epoxy resin, urethane (meth) acrylate, polyester (meth) ) Thermosetting resins such as acrylate, epoxy (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate and mixtures thereof, and thermoformability having radically polymerizable unsaturated groups Materials can be used. Even the resin as long as it is a resin having a stability that can form a hologram, can be used.

Further, as an agent for improving coating suitability and transferability, a cellulose resin such as nitrocellulose, acetylcellulose, cellulose acetate butyrate, cellulose acetate propionate, ethylcellulose and methylcellulose can be added.

In order to apply such a hologram forming layer 10, the transfer sheet 1 shown in FIG. 5 is coated with a resin prepared by a known coating method such as roll coating or blade coating.
2 can be formed by coating and drying on the releasable protective layer 6, and its film thickness is set to about 0.5 to 5 μm.

The hologram-forming layer 10 formed in this manner adheres moderately to the heat-resistant base sheet 7 coated with the release adhesive layer 6 and has excellent formability by heating and pressing during embossing. With nickel on the surface,
A transparent thin film layer 9 that does not show adhesion to a surface relief hologram stamper plated with gold, chrome, etc.
Shows good adhesiveness, and the film breakability required at the time of transfer to a substrate is also good.

It should be noted that a hologram forming layer 10 is formed with a white light or monochromatic light reproducing hologram on which a fine relief pattern is recorded. A hologram information area relief pattern is formed by a hologram photographing method using a transparent original (not shown). A transmissive document and a diffusion plate are arranged in an overlapping state, and a support coated with a photosensitive material is arranged below. Then, when incident light is incident from above the diffusion plate, the light is diffused by the diffusion plate and selectively passes through the transmission original. The light transmitted through the transparent original is called object light. The object light interferes with the reference light irradiated from above at 12 o'clock when the support coated with the photosensitive material is viewed from above and obliquely from above when viewed from the side, and corresponds to the hologram information area on the photosensitive material. Record the interference fringes.

After such an exposure treatment, the photosensitive material is developed to form a master hologram having a relief pattern. Based on the master hologram, a stamper is manufactured by known electroforming means. With this stamper, a relief pattern is formed on the hologram forming layer.

In addition, a hologram such as a known hologram such as a two-beam interferometry or a grating hologram or a Lippmann hologram having fine irregularities formed by a diffraction grating (grating) using an electron beam (EB) can be used. It is possible to use variously according to the application without being performed.

Next, as a material forming the transparent thin film layer 9, the refractive index of the hologram forming layer 10 (refractive index n = 1.
A material having a higher refractive index than 3 to 1.5) and a high transmittance in the visible light region is used. When a transparent thin film layer having a high refractive index is provided along the relief pattern surface of the hologram forming layer, light in the transparent thin film layer can be obtained within the reproducible angle range of the hologram image due to the angle dependence of reproduction, which is a feature of the hologram. This is because the reflectance becomes maximum and functions as a “reflection hologram”, but only functions as a mere transparent body outside the reproducible angle range of the hologram image, and the image 3 can be seen through.
Table 2 shows a material constituting such a transparent thin film layer.
And the inorganic materials described in (1).

[0053]

[Table 2]

As a method of forming the transparent thin film layer, known film forming means such as a vacuum evaporation method, a sputtering method, and an ion plating method can be used. Appropriate. Further, a plurality of transmissive thin film layers may be overlapped, a combination of transmissive thin film layers having different refractive indices, or a multilayer film in which high refractive index layers and low refractive index layers are alternately laminated.

Although not shown, the image forming bodies 1 and 11
In the usual silk screen printing method, visible information or information that can be read mechanically, as identification codes such as multicolor character patterns (characters, numbers, alphabets, marks, etc.), barcodes, carla codes, etc., It is provided by an offset printing method or a gravure printing method, and can be formed on at least a part of the hologram forming layer or the transparent thin film layer. The ink to be used is not particularly limited, but may be any as long as it does not deteriorate the hologram forming layer and the transparent thin film layer.

Further, at least one of a fluorescent material, an infrared absorbing material, and a magnetic material can be contained in the printing ink forming the visible information or the mechanically readable information. By forming with an absorbing ink or a magnetic ink, the presence or absence of the presence can be verified by black lamp irradiation, an infrared scope, a magnetic sensor or the like, and the verification means can be mechanized.

Next, a brief description will be given of a method of manufacturing the image displays 1 and 11 by the thermal transfer method. In addition, as an example, FIG.
5 used for forming the fraud prevention image display 11 shown in FIG.
This will be described using the transfer sheet 12 shown in FIG.

First, as shown in FIG. 9A, a heat-resistant base sheet 7 made of polyethylene terephthalate or the like,
A releasable protective layer 6 made of a thermoplastic acrylic resin or the like, a hologram forming layer 10 having a hologram relief pattern, a transparent thin film layer 9 having a higher refractive index than the hologram forming layer 10, and a sublimation property (heat transfer property) The image receiving layer 4 is made of a resin material that is dyed with a dye and has a thermal adhesive property to the transfer target.

Then, this transfer sheet 12 is conveyed to a sublimation transfer device j whose main part is composed of a drum h and a thermal head i as shown in FIG. 10, and a transfer ribbon whose coloring material is a sublimable dye is used. k, a dye layer (not shown) is brought into contact with the image receiving layer 4 of the transfer sheet 12 and the transfer ribbon k
The thermal head i is pressed from the side, and a heating element group (not shown) of the thermal head i is appropriately heated based on the image data to form an image 3 on the image receiving layer 4 [FIG.
(B)]. When an image is formed in multiple colors, transfer ribbons having different color tones (for example, yellow, magenta, cyan, etc.) are applied, and a similar process is repeated to form a multicolor image on the image receiving layer 4. In the case of hot-melt transfer (WAX transfer), the entire resin of the ink layer of the transfer ribbon is transferred, and an image of the ink layer is formed on the image receiving layer 4.

Next, the image receiving layer 4 of the transfer sheet 12 on which the image has been formed is brought into contact with the substrate 2 (FIG. 9C).
A heating means n such as a hot roll or a hot plate is pressed and heated from the transfer sheet 12 side, the image receiving layer 4 is adhered to the base material 2, and the heat-resistant base sheet 7 is peeled off from the transfer sheet 12 to prevent fraud prevention. 11 is produced [FIG. 9 (d)].

Hereinafter, the present invention will be described with reference to specific examples. <Example 1> [Transfer sheet] A transfer sheet 8 shown in FIG. 2 (a) is obtained by coating a heat-resistant base sheet 7 made of a transparent polyethylene terephthalate film having a thickness of 25 µm on a peelable protective layer composition having the following composition. Was applied by a gravure method, and at a drying temperature of 110 ° C., a peelable protective layer 6 having a thickness of 1.5 μm was formed. ○ Peelable protective layer composition Acrylic resin 30 parts Polyester resin 5 parts Toluene 40 parts Methyl ethyl ketone 40 parts Methyl isobutyl ketone 20 parts

Next, an adhesion inhibiting layer composition having the following composition was applied onto the peelable protective layer 6 by a gravure method, and the adhesion inhibiting layer 5 having a thickness of 2.0 μm was formed at a drying temperature of 80 ° C. ○ Adhesion inhibition layer composition Acrylic modified silicone resin 30 parts Toluene 40 parts Methyl ethyl ketone 40 parts Methyl isobutyl ketone 20 parts

Further, an image receiving layer composition having the following composition was coated on the adhesion inhibiting layer 5 by a gravure method, and the drying temperature was 1
At 10 ° C., an image receiving layer 4 having a thickness of 2.0 μm was formed. ○ Image receiving layer composition Vinyl chloride-vinyl acetate copolymer 30 parts Polyester resin 30 parts Methyl ethyl ketone 50 parts Toluene 50 parts

[Transfer Ribbon] Three color dyes (yellow, magenta, cyan) are dispersed in polyvinyl butyral to prepare a dye ink, and each color is alternately formed on a 6 μm thick polyester film using a gravure coater. It was applied and dried so as to be arranged, thereby producing a transfer ribbon having three color dye layers.

The above transfer sheet and transfer ribbon are shown in FIG.
And the heating elements of the thermal head i are heated based on the image data, and a multicolor image 3 is formed on the image receiving layer 4 of the transfer sheet by the transfer ribbon made of the above dye. The image receiving layer 4 of the transfer sheet 12 is brought into contact with the base material 2 made of vinyl chloride, and pressurized and heated (heating temperature: 150 ° C.) from the transfer sheet side by heating means.
The image receiving layer 4 is pressed on the base material 2 and the heat-resistant base sheet 7 is peeled off from the transfer sheet 12 so that the image 3 as shown in FIG.
Was manufactured.

When an attempt was made to peel off the fraud-preventing image display 1 at the image display portion, as shown in FIG. 3 (a), in the portion where the adhesion inhibition layer 5 was present, between the adhesion inhibition layer 5 and the image receiving layer 4, In a portion where the adhesion inhibiting layer 5 is not present, the image is peeled between the image receiving layer 4 and the base material 2 and the image is peeled up and down to be destroyed. Was impossible.

<Example 2> The transfer sheet 12 shown in FIG. 4A was placed between the image receiving layer 4 and the peelable protective layer 6 of the transfer sheet 8 of Example 1 so as to cover at least a part thereof. A hologram-forming layer composition having a relief-shaped hologram pattern consisting of the following composition was applied by a gravure method to form a hologram-forming layer 10 having a thickness of 1.0 μm at a drying temperature of 110 ° C. Same as Example 1.

Hologram forming layer composition Vinyl chloride-vinyl acetate copolymer 20 parts Urethane resin 15 parts Methyl ethyl ketone 70 parts Toluene 30 parts For the hologram forming layer 10, a press plate on which a predetermined hologram image was prepared was placed on a plate surface temperature. 120 ° C, pressure 2k
gf / cm ² , speed 10 m / min. A hologram image was formed, and a 50 nm thick transparent thin film layer 9 of a material (ZnS) having a higher refractive index than the hologram formation layer was transferred and formed on the hologram formation layer 10 by a vacuum evaporation method. Next, an image 3 is formed on the image receiving layer 4 of the transfer sheet 12 using a thermal transfer ribbon for the transfer sheet 12,
Each layer except for the heat-resistant base sheet 7 is transferred and formed on FIG.
(A) image 3, image receiving layer 4, adhesion inhibition layer 5,
A tamper-proof image display 11 having a transparent thin film layer 9, a hologram forming layer 10 having a relief hologram pattern, and a peelable protective layer 6 was manufactured. The thermal transfer ribbon used is the same as in the first embodiment.

When an attempt was made to peel off the fraud-preventing image display body 11 at the image display portion, as shown in FIG. 6A, in the portion where the adhesion prevention layer 5 was present, the interlayer between the adhesion prevention layer 5 and the hologram forming layer 10 was formed. At the portion where the adhesion inhibiting layer 5 is not provided, in the image receiving layer 4 or in the transparent peeling layer 9 / image receiving layer 4
Hologram image (not shown) and / or
Alternatively, since the image peels up and down and is destroyed, it becomes difficult to restore the image, and it is impossible to reproduce the fraud-proof image display 11.

Example 3 An adhesion inhibiting layer composition having the following composition was applied onto a substrate 2 by a gravure method, and an adhesion inhibiting layer 5 was formed at a drying temperature of 110 ° C. to a thickness of 0.5 μm. . ○ Adhesion inhibition layer composition Polystyrene 20 parts Toluene 60 parts Methyl ethyl ketone 20 parts

The transfer sheet and the thermal transfer ribbon obtained by removing the release layer from the transfer sheet shown in the above Example 2 were set in the transfer apparatus shown in FIG. 10, and the image 3 was formed on the image receiving layer 4 in the same manner as in Examples 1 and 2. The respective layers except the heat-resistant base sheet 7 were transferred and formed on the base material 2 on which the adhesion inhibition layer 5 was formed, and the base material 2, the adhesion inhibition layer 5, and the like were formed as shown in FIG.
A fraud prevention image display 11 having an image 3, an image receiving layer 4, a transparent thin film layer 9, a hologram forming layer 10 having a relief hologram pattern, and a peelable protective layer 6 was produced.
The thermal transfer ribbon used is the same as in the first embodiment.

When an attempt was made to peel off the fraud-preventing image display body 11 at the image display portion, as shown in FIG. 11B, in the portion where the adhesion inhibition layer 5 was present, between the adhesion inhibition layer 5 and the image receiving layer 4, Peeled, and peeled off in the image receiving layer 4 or between the transparent film peeling layer 9 and the image receiving layer 4 in the portion where the adhesion inhibiting layer 5 was not present, and the hologram image (not shown) and / or the image peeled up and down and was broken. Therefore, restoration becomes difficult, and reproduction of this fraud-prevention image display 21 is impossible.

[0073]

According to the fraud-preventing image display of the present invention,
When peeling is performed between any of the layers, peeling occurs between the adhesion inhibition layer and a layer in contact with the adhesion inhibiting layer, and in other portions,
The destruction of the layer occurs due to the peeling at the weak part of the adhesive strength between the layers, and due to the difference between the peeling trace of the part of the adhesion inhibiting layer and the peeling trace of the other part, peeling between the layers of the image display body is prevented. It becomes clear that this has been done, and even if you attempt to regenerate or reuse it based on this, the destruction of the layer and the trace of peeling due to peeling will be conspicuous, that is, the trace of peeling on the image and hologram on the fraud prevention image forming body Are generated, these can be visually recognized from the outside, thereby facilitating the detection of fraud.

This adhesion inhibiting layer can be provided at an arbitrary position on each layer of the image display body for preventing fraud, and can be formed in a shape such that a message such as a character, a number, or a mark is displayed on a peeling mark at the time of peeling. Once peeled, a peeling trace that is difficult to reproduce is generated, and it is impossible to reproduce the fraud prevention image display.

By laminating the hologram-forming layer on the fraud-preventing image display, complete dead copy is difficult and the decorativeness can be improved.

According to the transfer sheet of the present invention for producing a fraud-preventing image display, an adhesion-inhibiting layer is provided in advance, so that a fraud-preventing image display can be visually transferred to an image-receiving layer after image formation. Can be formed reliably and simply.

[Brief description of the drawings]

FIGS. 1A and 1B are schematic cross-sectional views of a fraud-preventing image display according to the first invention of the present invention.

FIGS. 2 (a) and 2 (b) are schematic cross-sectional views of a transfer sheet used for producing the fraud-proof image display of FIGS. 1 (a) and 1 (b).

FIGS. 3A and 3B are schematic cross-sectional views showing a state where the fraud-prevention image display of FIGS. 1A and 1B is peeled between layers.

FIGS. 4A to 4D are schematic cross-sectional views of a fraud-preventing image display according to a second invention of the present invention.

FIGS. 5A to 5D are schematic cross-sectional views of transfer sheets used for producing the fraud-preventing image display of FIGS. 4A to 4D.

FIG. 6 is a schematic cross-sectional view showing a state in which the fraud-preventing image display of FIGS. 4A to 4D is separated between layers.

FIG. 7 is a schematic perspective view showing a state in which a fraud-preventing image display of the present invention is peeled between layers and a specific message is displayed by a peeling layer.

FIGS. 8A and 8B are plan views of a fraud-preventing image display according to the first and second aspects of the present invention.

FIGS. 9A to 9D are conceptual diagrams illustrating a process of manufacturing a fraud-proof image display using a transfer sheet.

FIG. 10 is a conceptual diagram illustrating a continuous manufacturing process for manufacturing a fraud-proof image display using a transfer sheet.

FIGS. 11A and 11B are schematic cross-sectional views before and after peeling of another configuration of a fraud-preventing image display according to the first and second inventions of the present invention.

FIGS. 12A and 12B are plan views showing a conventional image display.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Fraud prevention image display body 2 Base material 3 Image 4 Image receiving layer 5 Adhesion inhibition layer 6 Removable protective layer 7 Heat resistant base sheet 8, 12 Transfer sheet 9 Transparent thin film layer 10 Hologram forming layer 13 Hologram image h drum i Thermal head j sublimation transfer device k transfer ribbon

Continuation of front page (72) Inventor Atsushi Kijima 1-5-1, Taito, Taito-ku, Tokyo Letterpress Printing Co., Ltd.

Claims (10)

[Claims] 1. A fraud-preventing image display comprising an image receiving layer on which an image is recorded on at least a part or the entire surface of a substrate and a protective layer sequentially laminated, wherein the substrate, the image receiving layer, and the image receiving layer are provided. A fraud-preventing image display, comprising an adhesion-inhibiting layer for preventing adhesion between layers between any one of the protective layer and the protective layer. 2. A fraud-preventing image display comprising an image receiving layer, a hologram layer, and a protective layer recorded on at least a part or the entire surface of a substrate, wherein the substrate, the image receiving layer,
A fraud-preventing image display, comprising an adhesion-inhibiting layer for preventing adhesion between layers, formed between any one of the hologram layer and the protective layer. 3. The fraud-proof image display according to claim 1, wherein the adhesion inhibition layer has a desired information pattern shape. 4. The hologram layer according to claim 1, wherein the hologram layer is a hologram formation layer having fine irregularities and a transparent thin film layer which is in contact with a relief surface of the hologram formation layer and has a higher refractive index than the hologram formation layer. The fraud-preventing image display according to claim 2. 5. The image display device according to claim 2, wherein said hologram layer is a Lippmann hologram layer. 6. A transfer sheet comprising a heat-resistant base sheet, a releasable protective layer, a heat-sublimation transfer image or a hot-melt transfer image, and an image-receiving / adhesive layer having thermal adhesion to a material to be transferred. A transfer sheet, wherein an adhesion inhibition layer that prevents adhesion between layers is formed on any one of the peelable protective layer, the sublimation transfer image, and the image receiving layer. 7. A transfer comprising a heat-resistant base sheet, a peelable protective layer, a hologram layer, a heat-sublimation transfer image or a hot-melt transfer image, and an image-receiving layer having thermal adhesion to a material to be transferred. A transfer sheet, comprising: forming, on any one of the releasable protective layer, the hologram layer, the sublimation transfer image, and the image receiving layer, an adhesion inhibition layer that prevents adhesion between layers. Sheet. 8. The transfer sheet according to claim 6, wherein the adhesion inhibiting layer has a desired information pattern shape. 9. The hologram layer, wherein the hologram layer is a hologram formation layer having fine irregularities and a transparent thin film layer which is in contact with a relief surface of the hologram formation layer and has a higher refractive index than the hologram formation layer. The transfer sheet according to claim 7. 10. The transfer sheet according to claim 7, wherein said hologram layer is a Lippmann hologram.