JPH0761172A - Id card - Google Patents

Abstract

PURPOSE:To provide an ID card which does not curl even with a hard ultraviolet layer suitable for mass production by forming an image receiving layer for accepting coloring matters and also forming a transfer image and further forming an ultraviolet cure protective layer having the volume shrinkage factor of specified numerical value or less on one face of a substrate. CONSTITUTION:An ID card is constituted by forming an image receiving layer for accepting color matters and forming a transfer image and an ultraviolet cure protective layer having the volume shrinkage factor of 7% successively in said order on one face of a substrate. The thickness of the ultraviolet cure protective layer is set to be 1-30mum. When the volume shrinkage factor is beyond 10%, the ID card is curled to the cure protective layer side. When the thickness is beyond 30mum even if the volume shrinkage factor is 7% or less, the ID card is curled to the ultraviolet cure protective layer side. When the thickness is 1mum or less, the transfer image cannot be protected and the mechanical characteristics are insufficient.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ID card, and more particularly, it is suitable for mass production, has excellent durability, and does not curl despite the provision of an ultraviolet-curing protective layer, and has an image receiving layer. The present invention relates to an ID card that can protect a formed transfer image for a long period of time and can reliably protect important personal information.

[0002]

2. Description of the Related Art Currently, there are many types of ID cards such as licenses such as automobile licenses, identification cards, membership cards with photos, authentication identification cards, business cards with photos, etc. It is becoming popular. These ID cards, for example, ID cards such as automobile licenses, form a facial photograph on the surface of the support by the silver salt photography method and describe necessary information by the printing method, etc. For the purpose of protecting / maintaining information of the above or improving the durability of the ID card, a hard UV-curable protective layer formed by applying a UV-curable resin mainly made of acrylic resin and irradiating it with UV rays is formed. It was provided.

However, these conventional ID cards have the following problems. That is, since the formation of a facial photograph by the silver salt photography method has complicated multi-step processes such as exposure, development, fixing, and bleaching, a large amount of ID can be quickly produced.
It is not always appropriate in the field where cards must be produced. Alternatively, when the ultraviolet curable resin is applied and cured, the rate of change in volume before and after the curing, that is, the volume contraction rate is large in the case of the ultraviolet curable resin containing the acrylic resin as a main component. When the UV-curable protective layer is formed by using, there is a problem that the ID card may be curled or may be cracked on the surface when it is bent for a long period of use. The curling problem is serious because if the ID card curls, it is not only inconvenient to store it, but also it cannot be inserted into a reading machine for reading information on the ID card.

Under these circumstances, recently, a transfer image such as an image containing gradation information is formed on the surface of a support by a sublimation type thermal transfer recording system or a transfer image such as a character information containing image is formed by a thermal fusion type thermal transfer recording system. By providing such an image receiving layer, the problem of troublesome operation in silver salt photography has been solved. However, there is still no effective solution to the problem of curling of the UV-curable protective layer. Resolving such a problem early has become one of the important problems required in the modern mass card society.

The present invention solves the above-mentioned problems and is suitable for mass production. Even when a hard ultraviolet protective layer is provided, the strength can be maintained for a long period of time without curling, and it is formed in the image receiving layer. It is an object of the present invention to provide an ID card that can store important information of transferred images.

[0006]

As a result of intensive investigations by the present inventors in order to achieve the above object, an ultraviolet curable resin layer having specific properties among the ultraviolet curable resin layers is
The present invention has been reached by finding that curling can be suppressed to the extent that there is no practical problem.

That is, the invention according to claim 1 is characterized in that, on one surface of the support, an image receiving layer for receiving a dye to form a transferred image and an ultraviolet curing protective layer having a volume shrinkage of 7% or less are provided. The ID card according to claim 2, wherein the ultraviolet curing protective layer has a thickness of 1 to 30 μm. is there.

The ID card according to the present invention will be described in detail below.

The ID card according to the present invention has an ultraviolet curing protective layer (1), a support (2) and an image receiving layer (3), and if necessary, an intermediate layer (4) and a transparent protective layer (5). )
Alternatively, it has a writing layer (6).

(1) UV-Curing Protective Layer The UV-curing protective layer has a volumetric shrinkage ratio before and after curing of usually 7% or less, preferably 6% or less, and a thickness of usually 1 to 30 μm, preferably 1%. ~ 25 μm
Is. If the volume shrinkage exceeds 10%, the ID card having the UV-curable protective layer may be curled on the UV-curable protective layer side. Further, even if the thickness is 7% or less, if the thickness exceeds 30 μm, the ID card having the UV-curing protective layer curls toward the UV-curing protective layer side, while if it is 1 μm or less, the formed transfer Images may not be well protected and may have poor mechanical properties. In the present invention, the curling of the ID card is effectively prevented when the volumetric shrinkage rate and the thickness of the UV-curable protective layer satisfy the above range.

The volumetric shrinkage of the UV-curable protective layer before and after curing means the UV-cured volume after curing of the coating agent for forming the UV-curable protective layer for forming the UV-curable protective layer with respect to the volume at room temperature as described later. The ratio (%) occupied by the volume of the hardening protective layer.

The UV-curable protective layer comprises a coating agent for forming a UV-curable protective layer, which contains a resin or a resin composition appropriately selected from various UV-curable resins or UV-curable resin compositions described below. It can be formed by coating the surface of the image-receiving layer and irradiating it with ultraviolet rays.

Suitable examples of the ultraviolet curable resin or the ultraviolet curable resin composition capable of forming the ultraviolet curable protective layer include an epoxy resin or a resin composition containing an epoxy type resin as a main component. it can.

The coating agent for forming the UV-curable protective layer can be formed of a composition containing a UV-curable prepolymer and / or a monomer and a polymerization initiator as main components.

Examples of the UV-curable prepolymers and monomers include types in which polymerization is caused by radical polymerization (mainly acrylate type) and types in which polymerization is caused by cationic polymerization (mainly epoxy type). You can In the present invention, either may be used as long as it does not impair the purpose, but an epoxy type prepolymer or monomer is preferable.

The epoxy type UV-curable prepolymer and monomer will be described below. Examples of the epoxy-based prepolymer and monomer include a prepolymer containing two or more epoxy groups in one molecule. Examples of such prepolymers include alicyclic polyepoxides, polyglycidyl esters of polybasic acids, polyglycidyl ethers of polyhydric alcohols, polyglycidyl ethers of polyoxyalkylene glycols, and polyglycidyl ethers of aromatic polyols. Examples thereof include hydrogenated compounds of polyglycidyl ethers of aromatic polyols, urethane polyepoxy compounds and epoxidized polybutadienes. These prepolymers may be used alone or in a mixture of two or more.

The content of the prepolymer having two or more epoxy groups in one molecule in the coating agent for forming a UV-curable protective layer is preferably 70% by weight or more.

The above-mentioned polymerization initiator is preferably a cationic polymerization initiator, and specific examples thereof include aromatic onium salts.

Examples of the aromatic onium salt include salts of elements of Group Va of the periodic table, such as phosphonium salts (eg, triphenylphenacylphosphonium hexafluorophosphate), salts of elements of Group VIa, eg, sulfonium salts (eg, tetra. Triphenylsulfonium fluoroborate,
Triphenylsulfonium hexafluorophosphate, tris (4-thiomethoxyphenyl) hexafluorophosphate, sulfonium and triphenylsulfonium hexisafluoroantimonate), and salts of Group VIIa elements, such as iodonium salts (eg, diphenyl chloride). Iodonium and the like).

The use of such an aromatic onium salt as a cationic polymerization initiator in the polymerization of epoxy compounds is described in US Pat. Nos. 4,058,401 and 4,0.
69,055, 4,101,513 and 4,161,478.

Preferred cationic polymerization initiators include sulfonium salts of Group VIa elements.
Among them, from the viewpoint of ultraviolet curability and storage stability of the ultraviolet curable composition, triarylsulfonium hexafluoroantimonate is preferable.

The UV-curable protective layer coating agent further contains surface active agents such as oils (particularly silicone oil) and silicone-alkylene oxide copolymers (for example, L-5410 commercially available from Union Carbide Co.). Agents, silicone oil-containing aliphatic epoxides, FO-171 commercially available from 3M Company, FO-430 commercially available from 3M Company, and fluorocarbons such as Megafac F-141 commercially available from Dainippon Ink Co., Ltd. A surfactant or the like may be contained.

Further, in the coating agent for the UV-curable protective layer, for example, vinyl monomers such as styrene, paramethylstyrene, methacrylic acid ester, acrylic acid ester and the like, cellulosic, thermoplastic polyester, phenylglycidyl ether, silicon. The contained monoepoxide, monoepoxide such as butyl glycidyl ether and the like may be contained within a range that does not impair the effects of the present invention.

Further, in the coating agent for the UV-curable protective layer, dyes, pigments, thickeners,
Plasticizers, stabilizers, leveling agents, coupling agents, tackifiers, silicone group-containing activators, wetting improvers such as fluorocarbon group-containing surfactants, and other various additives,
Further, for the purpose of improving the fluidity during coating of the coating agent, a small amount of solvent such as acetone, methyl ethyl ketone, methyl chloride or the like which hardly reacts with the cationic polymerization initiator may be contained. Further, the UV-curable protective layer may contain, for example, the following fine particles. The inclusion of fine particles is preferable in that it is more effective against forgery and alteration than when it does not contain fine particles, and can be easily distinguished from other cards.

The material of the fine particles is not particularly limited, but usually inorganic fine particles and organic fine particles can be used. Examples of the inorganic fine particles include powders such as titanium white, magnesium carbonate, zinc oxide, barium sulfate, silica, talc, clay, brass and aluminum, and foils. As the organic fine particles, those which are not dissolved in an ultraviolet curable resin monomer or the like are preferable.

In the present invention, the ultraviolet curing protective layer may contain a colorant. Examples of the colorant include dyes, pigments, fluorescent dyes and infrared absorbing dyes. When the UV-curable protective layer contains a colorant, the UV-curable protective layer has a characteristic that it has a unique color tone, so there is no risk of alteration or forgery as compared with the case where the colorant is not contained. It is preferable in that it can be easily distinguished from other cards. Examples of the colorant include pigments, dyes, and infrared absorbers that are generally known in the field of synthetic resins. The amount of the colorant added is not particularly limited as long as it does not hinder the visibility of the recorded information on the transferred image, and various amounts can be selected.

Furthermore, the UV-curable protective layer may have a pattern of irregularities formed on its surface. It is preferable to form irregularities of a specific pattern on the surface of the UV-curing protective layer, for example, to form a mark, a pattern such as a fine pattern or a ground pattern, etc. on the surface because it can be distinguished from a counterfeit product or a modified product. . To make the surface of the UV-curable protective layer uneven, for example, a method of coating the UV-curable protective layer with a plate having a certain pattern of gravure eyes. Concavities and convexities can be formed by a method such as embossing when the ultraviolet curable resin is semi-cured.

The ultraviolet rays in ultraviolet curing mean light in the ultraviolet region, and also include light rays containing light in the ultraviolet region. Therefore, as the irradiation of ultraviolet rays, irradiation of sunlight, irradiation of low-pressure mercury lamp, irradiation of high-pressure mercury lamp, irradiation of ultra-high-pressure mercury lamp, irradiation of carbon arc, etc., irradiation by metal halide lamp, irradiation of xenon lamp and the like can be mentioned. . Also, depending on the case, high energy rays such as electron rays may be used.

In curing, the curing time can be shortened by heating the coating film of the coating agent for the ultraviolet curing protective layer before or after irradiation with ultraviolet rays. The UV-curable protective layer is directly formed on the surface of the transparent protective layer, which will be described later, or directly on the surface of the image receiving layer on which the transferred image is formed, when the transparent protective layer is not formed.

(2) Support As the support, various papers such as paper, coated paper, and synthetic paper (polypropylene, polystyrene, or a composite material obtained by laminating them with paper), white vinyl chloride resin, etc. Sheets, white polyethylene terephthalate base film, transparent polyethylene terephthalate base film, polyethylene naphthalate, ABS base film, AS base film, polypropylene base film, polystyrene base film, various plastic films or sheets, and various metals. Examples thereof include a film or sheet and a film or sheet formed of various ceramics.

In the support, white pigments such as titanium white, magnesium carbonate, zinc oxide, barium sulfate, silica, talc, clay, calcium carbonate, etc. are added in order to enhance the clarity of the transferred image formed on the image receiving layer. Is preferably added.

Among these, in the case of an ID card such as an automobile license, a sheet or film made of the vinyl chloride resin composition containing the white pigment is generally used.

The thickness of the support is usually 100 to
It is 1,000 μm, preferably 200 to 800 μm. The support may be embossed, signed, or
An IC memory, an optical memory, a magnetic recording layer, other printing, etc. may be provided.

(3) Image Receiving Layer The image receiving layer can be basically formed by various methods using a binder for the image receiving layer. The composition of the binder for the image receiving layer can be appropriately selected according to the purpose. The image receiving layer preferably contains a release agent,
The metal ion-containing compound described below and, if necessary, various additives may be contained. The image receiving layer may be formed of a single layer or a plurality of layers.

When the surface of the support or an intermediate layer described later is provided, the thickness of the image receiving layer formed on the surface is usually 1 to 20 μm, preferably 3 to 10 μm.
Is.

<Binder for image receiving layer> The binder for the image receiving layer is not particularly limited, and various known resins can be used. For example, polyvinyl chloride resin, copolymer resin of vinyl chloride and other monomer (eg, isobutyl vinyl ether, vinyl propionate, etc.), polyester resin, poly (meth) acrylic acid ester, polyvinylpyrrolidone, polyvinyl acetal system. Resin, polyvinyl alcohol, polycarbonate, cellulose triacetate, polystyrene, styrene and other monomers
(For example, copolymers with acrylic acid ester, acrylonitrile, ethylene chloride, etc.), vinyltoluene acrylate resin, polyurethane resin, polyamide resin, urea resin, epoxy resin, phenoxy resin, polycaprolactone resin, polyacrylonitrile resin, and modifications thereof. You can list things.

Among these, polyvinyl chloride resins, copolymers of vinyl chloride with other monomers, polyester resins, polyvinyl acetal resins, copolymers of styrene with other monomers, epoxy resins. Is preferred. These resins may be used alone or in combination of two or more. The various resins described above may be newly synthesized by various methods and used, or commercially available products may be used.

In the image receiving layer, the various resins described above utilize their reaction active points (if there are no reaction active points, they are imparted to the resin), and are exposed to radiation, heat, moisture, a catalyst, etc. It can be formed by crosslinking or curing. In such a case, a radiation-active monomer such as epoxy or acrylic, or a crosslinking agent such as isocyanate can be used.

<Release Agent> It is preferable to add a release agent to the image-receiving layer in order to facilitate the separation of the image-receiving ink sheet and the image-receiving layer, which will be described later. Examples of the releasing agent include solid waxes such as silicone oil (including what is called a silicone resin), polyethylene wax, amide wax, Teflon powder, and the like.
Examples thereof include fluorine-based and phosphoric acid ester-based surfactants, fine metal powders, silica gel, metal oxides, carbon black, and fillers such as fine resin powders. These may be used alone or in combination of two or more.

The silicone oil is classified into a simple addition type (simple addition type) and a curing or reacting type (curing reaction type). In the case of the simple addition type,
In order to improve the compatibility with the binder, it is preferable to use a modified silicone oil (for example, polyester modified silicone resin, urethane modified silicone resin, acrylic modified silicone resin, etc.). The addition amount of these simple addition type silicone oils cannot be uniformly determined because it may change variously depending on the type, but generally speaking, it is usually added to the binder for the image receiving layer. It is 0.1 to 30% by weight, preferably 0.5 to 20% by weight.

Examples of the curing reaction type silicone oil include a reaction curing type (a reaction-curing type of amino-modified silicone oil and an epoxy-modified silicone oil), a photo-curing type, and a catalyst-curing type. The addition amount of these curable silicone oils is preferably 0.5 to 30% by weight of the binder for the image receiving layer.

The amount of the release agent other than the above silicone oil added is preferably 1 to 40% by weight based on the image receiving layer.

<Metal Ion-Containing Compound> When the image-receiving layer contains a metal-ion-containing compound, if the heat-diffusible dye thermally transferred to the image-receiving layer is a chelatable dye, it contains a heat-diffusible dye and a metal ion. By forming a chelate dye with the compound, an image with good fixability can be formed.

Examples of the metal ion constituting the metal ion-containing compound include divalent and polyvalent metals belonging to Groups I to VIII of the periodic table. Among these, Al, Co, Cr, Cu , Fe, Mg, Mn, Mo,
Ni, Sn, Ti and Zn are preferred, especially Ni, C
u, Co, Cr and Zn are preferred.

The compound containing these metal ions is preferably an inorganic or organic salt of the metal and a complex of the metal. Specific examples are Ni ²⁺ , Cu ²⁺ and Co.
A complex represented by the following general formula and containing ²⁺ , Cr ²⁺ and Zn ²⁺ can be preferably used.

[M (Q1) k (Q2) m (Q3) n] p + p (L-) However, in the formula, M represents a metal ion, and Q1, Q2, Q
3 each represents a coordination compound capable of forming a coordination bond with a metal ion represented by M. The coordination compound can be selected, for example, from the coordination compounds described in “Chelate Chemistry (5) (Nankodo)”. More preferably, a coordination compound having at least one amino group that forms a coordinate bond with a metal can be mentioned, and more specifically, ethylenediamine and its derivatives, glycinamide and its derivatives, picolinamide and its derivatives can be mentioned. be able to.

In the above formula, L is a counter anion capable of forming a complex, and examples thereof include inorganic compound anions such as Cr, SO ₄ , and ClO ₄ and organic compound anions such as benzenesulfonic acid derivatives and alkylsulfonic acid derivatives. Particularly preferred are the tetraphenylboron anion and its derivatives, and the alkylbenzene sulfonate anion and its derivatives.

In the above formula, k represents an integer of 1, 2 or 3, m represents 1, 2 or 0, and n represents 1 or 0, which are 4 in the complex represented by the general formula. Or a coordinating
Determined by 6-coordination, or Q1, Q2
, Q3 determined by the number of ligands. p is 1, 2
Or represents 3. Examples of this type of metal ion-containing compound include those exemplified in US Pat. No. 4,987,049.

The amount of the metal ion-containing compound added is preferably 0.5 to 20 g / m ² with respect to the image receiving layer, and particularly 1
It is preferably 10 g / m ² .

<Additive> The image-receiving layer contains an antioxidant, U
A V absorber, a light stabilizer, a filler (inorganic fine particles, organic resin particles), a pigment, and a sensitizer such as a plasticizer and a heat-melting substance may be contained as additives.

As the above-mentioned antioxidant, JP-A-59-1 is used.
82785, 60-130735, JP-A 1-1.
Examples thereof include compounds described in JP-A-27387 and the like, and compounds known to improve the image durability of photographs and other image recording materials.

As the UV absorber and the light stabilizer,
JP-A-59-158287, JP-A-63-74686,
63-145089, 59-19692, 6
No. 2-229594, No. 63-122596, No. 61
Examples thereof include compounds described in JP-A No. 283595, JP-A No. 1-204788, and compounds known to improve image durability in photographs and other image recording materials.

Examples of the filler include inorganic fine particles and organic resin particles, which may also serve as the above-mentioned releasing agent. Examples of the inorganic fine particles include silica gel, calcium carbonate, titanium oxide, acid clay, activated clay, alumina and the like. Examples of the organic fine particles include resin particles such as fluororesin particles, guanamine resin particles, acrylic resin particles, and silicon resin particles. These inorganic / organic resin particles differ depending on the specific gravity, but it is preferable to add 0.1 to 70% by weight.

Typical examples of the pigment include titanium white, calcium carbonate, zinc oxide, barium sulfate, silica, talc, clay, kaolin, activated clay and acid clay.

Examples of the plasticizer include phthalic acid esters, trimellitic acid esters, adipic acid esters, other saturated or unsaturated carboxylic acid esters,
Examples thereof include citric acid esters, epoxidized soybean oil, epoxidized linseed oil, epoxystearic acid epoxies, orthophosphoric acid esters, phosphite esters, glycol esters and the like.

Examples of the heat-fusible substance include alcohols such as terpineol, menthol, 1,4-cyclohexanediol and phenol, amides such as acetamide and benzamide, coumarin and esters such as benzyl cinnamate, diphenyl ether and crown. Ethers such as ethers, camphor, ketones such as p-methylacetophenone, aldehydes such as vanillin and dimethoxybenzaldehyde, hydrocarbons such as norbornene and stilbene, higher fatty acids such as margaric acid, higher alcohols such as eicosanol, and palmitic acid. Higher fatty acid esters such as cetyl, higher fatty acid amides such as stearic acid amide, monomolecular compounds represented by higher amines such as behenylamine, carnauba wax, beeswax, paraffin wax, ester wax, and molybdenum wax. Waxes such as tan wax and amide wax, ester gum, rosin maleic acid resin, rosin derivative such as rosin phenol resin, phenol resin, ketone resin, epoxy resin, diallyl phthalate resin, terpene resin, aliphatic hydrocarbon resin, cyclopentadiene Examples thereof include resins, polyolefin-based resins, polymer compounds represented by polyolefin oxides such as polyethylene glycol and polypropylene glycol, and the like. The heat-meltable substance is preferably a compound having a melting point or a softening point of 10 to 150 ° C.

In the present invention, the total amount of the above additives is 0.1 to 30% by weight based on the resin for the image receiving layer.
It is preferable to select within the range.

<Production of Image-Receiving Layer> The image-receiving layer is prepared by dispersing or dissolving the components forming the image-receiving layer in a solvent to prepare a coating solution for the image-receiving layer. It can be manufactured by a coating method of coating and drying on the surface of. It can also be produced by a laminating method or the like in which a mixture having components for forming the image receiving layer is melt extruded and attached to the surface of the support.

Examples of the solvent used in the coating method include conventionally known solvents such as water, alcohol, methyl ethyl ketone, toluene, dioxane and cyclohexanone.

When the laminating method is adopted, the coextrusion method can also be adopted. The image-receiving layer may be formed over the entire surface of one surface of the support or may be formed on a part thereof. In the present invention, the image-receiving layer is formed on a part of the support. Is preferred.

--Formation of Transfer Image ---- In the image receiving layer, an image containing gradation information such as a person image having gradation and information relating to an individual who possesses an ID card or an issuing office for issuing the ID card An image containing character information representing characters, figures, symbols, etc. in which unique information is written is formed using an ink sheet for thermal transfer recording.

The thermal transfer recording ink sheet can basically be formed by laminating an ink layer on a support. The heat-sensitive transfer recording ink sheet has a meltable ink layer used in a heat-melt recording method (heat-melt transfer recording ink sheet), or a heat-diffusible dye-containing ink used in a heat diffusion transfer method. There are those having a layer (ink sheet for thermal diffusion transfer recording) and the like. Of these, the gradation information-containing image or the like is usually formed by a thermal diffusion transfer recording ink sheet, and the character information-containing image is formed by a thermal diffusion transfer recording ink sheet or a thermal fusion type transfer recording ink sheet. .

{1. Ink sheet for thermal diffusion transfer recording} = 1 = Support body The support body is not particularly limited as long as it has a material having good dimensional stability and withstands heat during recording with a thermal head. It is possible to use thin paper such as glassine paper, heat-resistant plastic film such as polyethylene terephthalate, polyethylene naphthalate, polyamide, polyimide, polycarbonate, polysulfone, polyvinyl alcohol cellophane, and polystyrene.

The thickness of the support is 2 to 10 μm.
Is preferred. The shape of the support is not particularly limited, and examples thereof include wide sheets and films, narrow tapes and cards, and the like.

= 2 = Ink Layer The ink layer contains a thermal diffusible dye and a binder as essential components when transferred to an image receiving sheet by a thermal diffusion transfer method.

= 2.1 = Thermal Diffusible Dyes Examples of the thermally diffusible dyes include cyan dyes, magenta dyes and yellow dyes.

As the cyan dye, there is disclosed in JP-A-59-7.
8896, 59-227948, and 60.
No. 24966, No. 60-53563, and No. 6
No. 0-130735, No. 60-131292, No. 60-239289, No. 61-19396.
No. 61-29293, No. 61-3129.
No. 2, gazette 61-31467, gazette 61-359.
94, 61-49893, 61-14.
No. 8269, No. 62-191191, No. 63.
-912288, 63-91287, and 6
Examples thereof include naphthoquinone dyes, anthraquinone dyes and azomethine dyes described in JP-A-3-290793.

As the magenta dye, there is disclosed in JP-A-59-
No. 78896, No. 60-30392, No. 60-30394, No. 60-25359.
5, JP-A 61-262190, JP-A 6-62
Anthraquinone dyes, azo dyes, and azomethine dyes described in JP-A No. 3-5992, JP-A No. 63-205288, JP-A No. 64-159, and JP-A No. 64-63194. Etc. can be mentioned.

Examples of the yellow dye include those disclosed in JP-A-59-59.
78896, JP-A-60-27594, JP-A-60-31560, and JP-A-60-53565.
Japanese Patent Laid-Open No. 61-12394, Japanese Patent Laid-Open No. 63-
Examples thereof include methine dyes, azo dyes, quinophthalone dyes, and antrythothiazole dyes described in various publications such as 122594.

As the heat-diffusible dye, a compound having an active methylene group of open chain type or closed type is preferably an oxidized product of p-phenylenediamine derivative or p-phenylenediamine derivative.
Azomethine dye obtained by coupling reaction with aminophenol derivative oxidant and indoaniline obtained by coupling reaction with phenol or naphthol derivative or p-phenylenediamine derivative oxidant or p-aminophenol derivative oxidant It is a pigment.

The heat diffusible dye contained in the ink layer containing the heat diffusible dye may be any of a yellow dye, a magenta dye, and a cyan dye as long as the image to be formed is a single color.

When the image-receiving layer of the ID card contains a metal ion-containing compound, the heat diffusible dye is preferably a dye compound capable of forming a chelate with the metal ion-containing compound.

The dye compound which forms a chelate with the metal ion-containing compound is not particularly limited, and various compounds known per se can be appropriately selected and used. For example, JP-A-59-78893 and JP-A-59-10.
No. 9349, Japanese Patent Application Nos. 2-213303, 2-21
Cyan image forming dyes (hereinafter referred to as cyan dyes), magenta image forming dyes (hereinafter referred to as magenta dyes), yellow image forming dyes (hereinafter referred to as yellow dyes) and the like described in 4719 and 2-203742. Can be mentioned.

Among the above dyes, it is preferable to use at least a dye compound capable of forming a bidentate chelate with the above-mentioned metal ion-containing compound. Examples of such dyes include dyes represented by the following general formula.

[0075]

[Chemical 1]

In the above formula, X1 represents an aromatic carbocycle in which at least one ring is composed of 5 to 7 atoms, or a group of atoms necessary for completing a heterocycle, and At least one of the adjacent positions of the carbon atoms bonded to the bond is a nitrogen atom or a carbon atom substituted with a chelating group. X2 has at least one ring of 5 to 7
Represents an aromatic heterocycle or an aromatic carbocycle composed of atoms. G represents a chelating group.

Whichever dye compound is used,
Depending on the color tone of the image to be formed, any two or more kinds of the above three kinds of dyes or another heat diffusible dye may be contained.

The amount of the heat-diffusible dye used is usually 0.1 to ²⁰ g, preferably 0.2 to 5 g, per 1 m ² of the support of the ink sheet.

= 2.2 = Binder As the binder, for example, cellulose addition compounds, cellulose resins such as cellulose ester and cellulose ether, polyvinyl alcohol, polyvinyl formal, polyvinyl acetoacetal, polyvinyl butyral and other polyvinyl acetal resins, polyvinylpyrrolidone. , Vinyl acetate, polyacrylamide, styrene resin, poly (meth) acrylic acid ester, poly (meth) acrylic acid, (meth) acrylic acid copolymer and other vinyl resins, rubber resins, ionomer resins, olefins Examples thereof include system resins and polyester resins. Among these resins, polyvinyl butyral, polyvinyl acetoacetal, and cellulosic resins, which have excellent storage stability, are preferable.

The above various binders may be used alone or in combination of two or more. The weight ratio of the binder to the heat diffusible dye is preferably 1:10 to 10: 1, and particularly 2: 2.
It is preferably 8 to 7: 3.

= 2.3 = Other optional components Further, various additives can be appropriately added to the ink layer. Examples of the additives include silicone resins, silicone oils (reaction-curable types are also possible), silicone-modified resins, fluororesins, surfactants, and peelable compounds such as waxes, fine metal powders, silica gel, metal oxides, carbon. Examples thereof include fillers such as black and resin fine powder, and curing agents capable of reacting with a binder component (for example, radiation-active compounds such as isocyanates, acryls and epoxies).

Further, as an additive, a heat-melting substance for promoting transfer, for example, a compound described in JP-A-59-106997, such as wax or higher fatty acid ester, can be mentioned.

= 3 = Other Layers The thermal diffusion transfer recording ink sheet is not limited to a two-layer structure composed of a support and an ink layer, and other layers may be formed. For example, an overcoat layer may be provided on the surface of the ink layer for the purpose of preventing fusion with the image receiving layer in the ID card and settling (blocking) of the heat diffusing dye.

Further, the support may have an undercoat layer for the purpose of improving the adhesiveness with the binder and preventing the dye from being transferred to the support and dyeing. Further, a sticking prevention layer is provided on the back surface of the support (on the side opposite to the ink layer) for the purpose of preventing fusion of the head to the support, sticking, and wrinkling of the ink sheet for thermal diffusion transfer recording. Good.

The thickness of the overcoat layer, the undercoat layer and the sticking prevention layer is usually 0.1 to 1 μm.

{2. Manufacture of Ink Sheet for Thermal Diffusion Transfer Recording} The ink sheet for thermal diffusion transfer recording is prepared by preparing an ink layer forming coating liquid obtained by dispersing or dissolving the various components forming the ink layer in a solvent. Can be produced by coating the surface of a support with the coating and drying.

The binder is used alone or in combination of two or more in a solvent or dispersed in a latex form. Examples of the solvent include water, ethanol, tetrahydrofuran, methyl ethyl ketone, toluene, xylene, chloroform, dioxane, acetone, cyclohexane, and normal butyl acetate.

Examples of the method of applying the coating include the conventionally known surface sequential coating application method using a gravure roll, extrusion coating method, wire bar coating method, roll coating method and the like.

The ink layer may be formed as a layer containing a monochromatic heat diffusible dye on the entire surface or a part of the surface of the support, or a yellow ink containing a binder and a yellow dye. A layer, a magenta ink layer containing a binder and a magenta dye, and a cyan ink layer containing a binder and a cyan dye are formed on the entire surface or a part of the surface of the support at regular intervals along the plane direction. May be.

Further, in addition to the three ink layers arranged in the plane direction, a black ink layer containing a black image forming substance may be interposed. With respect to the black ink layer, a clear image can be obtained by either the diffusion transfer type or the melt transfer type.

The thickness of the ink layer thus formed is usually 0.2 to 10 μm, preferably 0.3 to 3 μm.

The thermal diffusion transfer recording ink sheet is
Convenience during use can be achieved by forming perforations or providing detection marks for detecting the positions of areas having different hues.

--- Image formation ---- The gradation information-containing image is formed, for example, on the interface between the ink layer and the image receiving layer by superimposing the ink layer of the thermal diffusion transfer recording ink sheet and the image receiving layer on the ID card. It can be formed by applying thermal energy to the imagewise. Then, the heat-diffusible dye in the ink layer is vaporized or sublimated by an amount according to the heat energy applied at the time of image formation, is transferred to the image-receiving layer side and is received. Gradation of photo images (color)
Image) is formed.

When an image-receiving layer containing the above-mentioned metal ion-containing compound is used as the image-receiving layer in an ID card,
The dye image is formed as a chelate image.

A thermal head is generally used as a heat source for providing heat energy.
Known ones such as infrared flash and hot pen can be used.

When the thermal head is used, the thermal energy applied can be changed continuously or in multiple steps by modulating the voltage or pulse width applied to the thermal head.

When using the laser light, the thermal energy to be applied can be changed by changing the light amount of the laser light or the irradiation area. In this case, in order to easily absorb the laser light, a laser light absorbing material (for example, in the case of a semiconductor laser, carbon black or a near infrared absorbing substance) may be present in the ink layer or in the vicinity of the ink layer. When the laser light is used, it is advisable to bring the ink sheet for thermal diffusion transfer recording and the image receiving layer into close contact with each other. If a dot generator with a built-in acousto-optic element is used, it is possible to give heat energy according to the size of the halftone dot.

When the infrared flash lamp is used, heating is preferably performed through a colored layer such as black as in the case of using laser light. Alternatively, heating may be performed through a pattern or a halftone dot pattern in which the gradation of the image is continuously expressed, such as black, or a colored layer such as black on one surface and a negative pattern corresponding to the negative of the above pattern may be formed. You may heat in combination.

The thermal energy may be applied from the thermal diffusion transfer recording ink sheet side, from the image receiving layer side of the ID card, or from both sides. If the use is prioritized, it is desirable to start from the thermal diffusion transfer recording ink sheet side.

By the above thermal transfer recording, an image of one color can be recorded on the image receiving layer of the ID card, but by the following method, it is also possible to obtain a color photographic tone color image formed by combining the respective colors. . For example, if yellow, magenta, cyan, and, if necessary, black thermal transfer recording heat-sensitive sheets are sequentially replaced, and thermal transfer is performed in accordance with each color, a color photographic tone color image composed of a combination of each color can be obtained. .

The following method is also effective. That is, instead of using the thermal diffusion transfer recording ink sheet of each color as described above, the thermal diffusion transfer recording ink sheet having the areas formed by separately coating the respective colors is used. First, the yellow color separation image is thermally transferred using the yellow area, then the magenta color separation image is thermally transferred using the magenta area, and the following steps are sequentially repeated to repeat yellow, magenta, cyan, and if necessary. A method of thermally transferring the black color separation image in order is adopted. This method can also obtain a color image of a color photographic tone, but more conveniently, this method has an advantage that the above-mentioned heat-sensitive transfer recording sheet need not be replaced.

After the image is formed by the above method, heat treatment may be performed by the above method for the purpose of improving the image storability. For example, the entire surface of the image forming surface may be subjected to heat treatment using a portion of the ink sheet where the ink layer is not provided, or may be newly subjected to heat treatment such as a heat roll. Further, when the near infrared ray absorbent is contained, the image forming surface may be exposed by using an infrared flash lamp.

In any case, the heating means is not limited,
Since the purpose is to further diffuse the dye inside the image receiving layer, it is effective and preferable to heat from the support side of the image receiving layer. A transfer image can be formed on the image receiving layer as described above.

(4) Intermediate Layer In the ID card of the present invention, an intermediate layer can be provided between the image receiving layer and the support, if necessary.

The intermediate layer is not particularly limited as long as it can maintain the form of an ID card and does not reduce its mechanical strength, and can be formed by selecting various materials and methods. it can.

When the intermediate layer is provided, the adhesive force between the intermediate layer and the support or the adhesive force between the intermediate layer and the image receiving layer is relatively greater than the adhesive force between other layers. It is preferable to form it so that it becomes smaller. In such a case, even if the interface of the image receiving layer on which the transfer image is formed is selectively peeled for the purpose of modifying the ID card, at least a part of the interface of the intermediate layer is separated, so that the modification is effectively performed. Is preferable in that it can prevent

The intermediate layer is formed, for example, by applying a liquid obtained by mixing a resin having a low softening point, a tackifier, etc., and a heat-fusible substance and / or a thermoplastic substance to the surface of the support. You can

Examples of the resin having a low softening point used in the intermediate layer include ethylene-based copolymers such as ethylene-vinyl acetate and ethylene-ethyl acrylate, polyamide-based resins such as nylon and dimer acid, styrene-butadiene and styrene- Polystyrene resin such as isoprene, styrene-ethylene-butylene, polyester resin, polyolefin resin, polyvinyl ether resin, polymethylmethacrylate resin, ionomer resin, cellulose resin, polyurethane resin, acrylic resin, epoxy resin , Melamine resins, vinyl chloride resins and the like.

Examples of the tackifier include unmodified rosin tackifiers, water-added rosin tackifiers, rosin maleic acid tackifiers, polymerized rosin tackifiers and rosin phenol tackifiers. Alternatively, modified rosin-based tackifiers, terpene-based tackifiers, petroleum resin-based tackifiers and modified tackifiers thereof can be mentioned.

The heat-melting substance that can be contained in the intermediate layer is the same as the heat-melting substance that can be contained in the image receiving layer.

Examples of the method for forming the intermediate layer include a coating method using a solvent and a hot melt coating method.

The thickness of the intermediate layer thus formed is usually 0.1 to 10 μm, preferably 0.3 to 5 μm.

(5) Transparent Protective Layer In the ID card of the present invention, when the UV-curable protective layer described later is formed on the image-receiving layer having the image information formed by the sublimation type thermal transfer system, the image-receiving layer and the UV-curable protective layer are formed. By improving the adhesive strength between the layer and the transparent protective layer, the durability of the ID card such as peel strength is improved, and the transfer image is prevented from bleeding, and clear image information is maintained and protected for a long period of time. For the purpose, it consists of a material with low affinity for the dye of the transferred image formed on the image receiving layer, and
A transparent protective layer having good adhesiveness to the image receiving layer and the ultraviolet curable protective layer is provided.

The transparent protective layer in the present invention can further minimize the interference of ultraviolet rays with the sublimable dye upon irradiation with ultraviolet rays, and prevent the coating agent from coming into contact with the sublimable dye when the coating agent is applied. It is preferable to have properties such as being able to.

The region where the transparent protective layer is formed may be only the portion of the image receiving layer where the image information is formed, or may be the entire image receiving layer. This transparent protective layer can be formed on the image recording body by, for example, a hot stamp or a thermal transfer method.
Further, an ultraviolet absorber may be contained in the transparent protective layer. Ultraviolet absorbers irradiate the coating agent containing the ultraviolet curable prepolymer with ultraviolet rays, and from the ultraviolet rays when curing it or the sunlight during long-term storage,
It is effective in protecting image information. Since it may be difficult to add this ultraviolet absorber to the ultraviolet curable resin layer, it is effective to add it to the transparent protective layer (which inhibits the curing of the ultraviolet curable resin). Examples of the ultraviolet absorber include the compounds exemplified in the description of the image receiving layer. The addition amount of the ultraviolet absorber depending on the type, is usually 0.6 g / m ² or more, 1 g / m ² or more.

The transparent protective layer may be formed of one layer or two or more layers, but in the present invention, it is preferably formed of a plurality of layers. It is preferable that the layer of the transparent protective layer that is in contact with the UV-curable protective layer contains the polyvinyl acetoacetal. In such a case, it is preferable in that the adhesive force with the ultraviolet curing protective layer can be improved.

The thickness of the transparent protective layer is usually 0.5 to 2 in consideration of the uniform coating property of the ultraviolet curable protective layer.
0.0 μm, and preferably 1.0 to 10.0 μm.

(6) Writing Layer The writing layer is a layer which allows writing on the back surface of the ID card. Examples of the writing layer include "writing layer" described in JP-A-1-205155.
Can be formed with. The writing layer is formed on the surface of the support on which the plurality of layers are not laminated.

<< Manufacture of ID Card >> The ID card of the present invention can be manufactured as follows. That is, as described above, the image receiving layer of the ID card and the ink layer of the sublimation-type thermal transfer recording ink sheet are superposed,
An image containing gradation information is formed by diffusively moving the heat diffusible dye to the image receiving layer by heating imagewise with a heat source such as a thermal head. Then, on the surface of the image receiving layer on which an image containing gradation information is not formed, by a sublimation type thermal transfer recording method using a sublimation type thermal transfer recording ink sheet or a heat melting type thermal transfer recording method using a heat fusible ink sheet, Thermally transfer various characters. A transparent protective layer containing polyvinyl acetoacetal is formed on the surface of the image receiving layer on which the gradation information-containing image formed as described above is formed, by a coating method, a hot stamping method using a transparent sheet, or other methods. Form.
After that, an ultraviolet curable resin is applied over the entire image receiving layer and irradiated with ultraviolet rays to form an ultraviolet curable protective layer.

The sublimation type thermal transfer recording ink sheet is not particularly limited, and conventionally known ones can be used.

The ID card thus obtained was convenient for mass production, and even when a hard UV protective layer was provided, the ID card could maintain its strength for a long period of time without curling, and was formed in the image receiving layer. The important information of the transferred image can be saved.

[0122]

EXAMPLES Examples of the present invention will be specifically described below. In the following, "part" means "part by weight".

(Example 1) -Preparation of support-A polyethylene terephthalate resin sheet having a thickness of 350 μm (manufactured by ICI: Melinex 226) has a thickness of 5 on both sides.
A 0 μm white polypropylene resin sheet (Noblene FL25HA manufactured by Mitsubishi Petrochemical Co., Ltd.) was heat-welded to obtain a wide composite resin sheet having a thickness of 450 μm. 25 W / (m on one surface of the obtained composite resin sheet
^A corona discharge treatment was performed for ² min., And the following layers were laminated using this sheet as a support.

-Formation of Intermediate Layer- An intermediate layer coating solution having the following composition was applied onto the surface of the support which had been subjected to corona discharge treatment and dried to form an intermediate layer having a thickness of 0.5 μm. .

<Coating Liquid for Forming Intermediate Layer> Polyvinyl butyral (Sekisui Chemical Co., Ltd .: S-REC BX-1) ... 9 parts Isocyanate (Nippon Polyurethane Co., Ltd .: Coronate HX) ... ..... 1 part methyl ethyl ketone ..... 80 parts cyclohexanone ..... .... 10 copies.

—Formation of Image Receiving Layer— The first intermediate having the following composition on the surface of the formed intermediate layer.
The image receiving layer was formed by laminating the coating liquid for forming the image receiving layer and the coating liquid for forming the second image receiving layer in this order so as to have thicknesses of 3.0 μm and 0.5 μm, respectively.

<Coating Liquid for Forming First Image Receiving Layer> Polyvinyl butyral resin (Sekisui Chemical Co., Ltd .: S-REC BX-1) ... 6 parts Metal ion-containing compound (Chemical Formula 2 below) Compound MS-17): 4 parts Methyl ethyl ketone: 90 parts

[0128]

[Chemical 2]

<Coating Liquid for Forming Second Image Receiving Layer> Polyethylene wax emulsion (manufactured by Toho Chemical Industry Co., Ltd .: Hitech E-11000) .. 2 parts Urethane-modified ethylene acrylic acid polymer emulsion (Toho Chemical Industry Co., Ltd. ): S-6254) ... 8 parts Methyl ethyl ketone ... 90 parts.

-Formation of Writing Layer- A coating liquid for forming a writing layer having the following composition was applied to the surface of the support opposite to the image receiving layer and dried to form a writing layer having a thickness of 40 μm.

<Coating liquid for writing layer formation> Colloidal silica: 2.5 parts Gelatin: ...・ ・ ・ ・ ・ ・ ・ ・ ・ 7.0 parts Hardener (compound represented by the following (Chemical Formula 3)) ・ ・ ・ ・ 0.2 parts Water ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ 90.0 copies.

[0132]

[Chemical 3]

—Transparent Protective Layer— On the surface of the formed image-receiving image, a coating solution for bonding a transparent protective layer and a coating solution for forming a transparent protective layer, each having the following composition, are dried by a wire bar coating method so that the dry layer thickness is Two
A transparent protective layer was formed by coating in this order so as to have a thickness of μm and 0.3 μm and drying.

<Coating Liquid for Adhesion of Transparent Protective Layer> Maleic anhydride-modified ethylene vinyl acetic acid (VR-103, manufactured by Toyo Morton Co., Ltd.) ... 10 parts Acrylic resin (Mitsubishi Rayon Co., Ltd. ): Dynar BR-87) ... 5 parts Styrene PMMA graft polymer (Toa Gosei Chemical Co., Ltd .: RESEDA GP-200) ... 5 parts Methyl ethyl ketone ... ·············································································································································· 5 / Perl (Hercules: N type) 5 parts Methyl ethyl ketone ... 90 parts.

—Ultraviolet Curing Protective Layer— A coating liquid for forming an ultraviolet curing protective layer having the following composition was prepared.

<Ultraviolet Curing Protective Layer Forming Coating Liquid> Side chain type bisphenol A diglycidyl ether ... 15 parts 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate ...・ ・ 70 parts Trimethylolpropane triglycidyl ether ・ ・ ・ 15 parts Fluorine-based surfactant ・ ・ ・ ・ 1 part Aromatic sulfonium Salt-based UV initiator: 6 parts.

-Formation of Transfer Image- The above I in which an intermediate layer, an image receiving layer, and a writing layer are provided on a support.
Sublimation type thermal transfer recording is performed by cutting the D card laminated body into a card size according to JIS standard, and superimposing the image receiving layer in the obtained ID card laminated body and the sublimation dye of the sublimation type thermal transfer ink sheet. Output from the ink sheet side using a thermal head 0.23 W / dot, pulse width 0.3 to 4.5 msec, dot density 16 dots / mm
By heating under the conditions described above, a human face image with gradation was formed on the image receiving layer.

Subsequently, the transparent protective layer was transferred to the image receiving layer of the image receiving sheet by the following method so that the transparent protective layer was located on the surface of this human facial image, and slightly larger than the human facial image. The transparent protective layer is 1 using a heat roller.
It was easily transferred to the image receiving layer by applying heat at 20 ° C. for 1.2 seconds and then peeling off the support.

Next, 20 g of a coating liquid for forming a UV-curable protective layer is applied to the surface of the transparent protective layer and the surface other than the transparent protective layer.
The coating amount for coating / m ² was applied by a wire bar method, and the coating material for forming an ultraviolet curing protective layer was cured under the following curing conditions to form an ultraviolet curing protective layer. The thickness of the ultraviolet curing protective layer is as shown in Table 1.

Curing conditions: Light irradiation source: 50 W / cm high pressure mercury lamp Irradiation distance: 10 cm Irradiation mode: Optical scanning at 1.3 cm / min The ID card thus obtained was evaluated as described below, and the results are shown in Table 1.

<< Evaluation >><Volume Shrinkage (%)> The volume shrinkage was calculated from the difference in specific gravity before and after curing. Specific gravity is measured by JISK7322,
It carried out according to K7112.

<Degree of curl> Place the ID card on a smooth table with the image recording surface facing up, press one end of the square of the card with your finger from above, and scale the height of the diagonal corners. To measure. Similarly, each four corners are measured. Then, an evaluation value corresponding to the height of the highest floating point was obtained according to the following criteria. There is no practical problem if the evaluation value is 2 or less.

Evaluation value 0 ... When the height of float is 1 mm or less Evaluation value 1 ... When the height of float is 1 to 2 mm Evaluation value 2 ... Height of float is 3 to 5 mm Evaluation value 3 ... When the height of the float is 6 to 10 mm Evaluation value 4 ... When the height of the float is 10 mm or more <Bending resistance> According to JIS K6772, a Scott gripping test Using a machine, a sample with a length of 80 mm and a width of 30 mm is bent at a bending temperature of 120 times / min, a bending stroke of 50 mm, a gripping distance of 10 mm, and a free end gripping opening width of 3 mm.
Based on the following criteria, the adhesiveness of the UV-curable protective layer, peeling,
Checked for cracks, folds, etc.

◯: No abnormalities were observed Δ: Some abnormalities were observed × ... Abnormalities were observed (Example 2) The coating liquid for forming the ultraviolet curable protective layer in Example 1 An ID card was produced in the same manner as in Example 1 except that the composition was changed as described below. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Ultraviolet Curing Protective Layer Forming Coating Liquid> Side chain type bisphenol A diglycidyl ether ... 10 parts 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate ... ··· 65 parts Sorbitol polyglycidyl ether ······ 25 parts Fluorosurfactant ····· 1 part Aromatic Sulfonium Salt UV Initiator ... 6 parts.

(Example 3) The composition of the coating liquid for forming an ultraviolet-curing protective layer in Example 1 was changed as follows, except that
An ID card was manufactured in the same manner as in Example 1. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<UV Curing Protective Layer Forming Coating Liquid> Phenol novolac-based polydiglycidyl ether: 10 parts 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate: 60 parts Polyglycerin Polyglycidyl ether: 25 parts Higher fatty acid alcohol glycidyl ether: 5 parts Fluorosurfactant ::・ ・ ・ ・ ・ ・ ・ ・ ・ 1 part Aromatic iodonium salt-based UV initiator ・ ・ ・ ・ ・ ・ ・ ・ ・ 4 parts.

(Example 4) The composition of the coating liquid for forming an ultraviolet-curing protective layer in Example 1 was changed as follows, except that
An ID card was manufactured in the same manner as in Example 1. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<UV Curing Protective Layer Forming Coating Liquid> 3,4-Epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate: 55 parts 1,4-butanediol diglycidyl ether:・ ・ ・ 30 parts Higher fatty acid alcohol glycidyl ether ・ ・ ・ ・ ・ ・ ・ ・ 10 parts Soybean oil epoxidized product ・ ・ ・ ・ 5 parts Silicone -Based surfactant ・ ・ ・ ・ 1 part Aromatic sulfonium salt-based UV initiator ・ ・ ・ ・ ・ 6 part .

(Example 5) An ID card was manufactured in the same manner as in Example 1 except that the thickness of the ultraviolet curing protective layer in Example 1 was changed to 25 µm as shown in Table 1. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

(Comparative Example 1) The composition of the coating liquid for forming a UV-curable protective layer in Example 1 was changed as follows, except that
An ID card was manufactured in the same manner as in Example 1. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Ultraviolet Curing Protective Layer Forming Coating Liquid> Polyester acrylate (Toagosei Kagaku Kogyo Co., Ltd .: Aronix M-8060) 100 parts Silicone surfactant ... ... 1 part UV initiator having the following composition: 5 parts.

The UV initiator is 2,2'-bis (O-
Chlorophenol) -4,4 ', 5,5'-tetraphenyl-1,2-biimidazole 2 parts, 4,4'bis (dimethylamino) benzophenone 3 parts, and 2-mercaptobenzoxazole 1 Methyl ethyl ketone solution containing 0.7 parts.

Comparative Example 2 The composition of the coating liquid for forming an ultraviolet-curing protective layer in Example 1 was changed as follows, and the thickness of the ultraviolet-curing protective layer in Example 1 was changed to 35 μm as shown in Table 1. Otherwise, the ID is the same as in the first embodiment.
Manufactured cards. Example 1 for the obtained ID card
The same evaluation as above was performed, and the results are shown in Table 1.

<UV Curing Protective Layer Forming Coating Liquid> Trimethylolpropane PO-modified (n = 2) triacrylate (Toa Gosei Chemical Industry Co., Ltd .: Aronix M-320) 100 parts Silicone surfactant 1 part UV initiator having the following composition: 5 parts.

The UV initiator is 2,2'-bis (O-
Chlorophenol) -4,4 ', 5,5'-tetraphenyl-1,2-biimidazole 2 parts, 4,4'bis (dimethylamino) benzophenone 3 parts, and 2-mercaptobenzoxazole 1 Methyl ethyl ketone solution containing 0.7 parts.

Comparative Example 3 An ID card was manufactured in the same manner as in Example 1 except that the thickness of the ultraviolet curing protective layer in Example 1 was changed to 35 μm as shown in Table 1. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0158]

[Table 1]

[0159]

According to the present invention, it is suitable for mass production,
It is possible to provide an ID card that can maintain its strength for a long period of time without curling even if a hard ultraviolet protective layer is provided and can store important information of a transferred image formed on an image receiving layer. it can.

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Claims (2)

[Claims] 1. A support comprising, on one surface thereof, an image receiving layer for receiving a dye to form a transferred image and an ultraviolet curing protective layer having a volume shrinkage of 7% or less in this order. ID card to be. 2. The ultraviolet curing protective layer has a thickness of 1 to 30.
The ID card according to claim 1, wherein the ID card is μm.