JPH07117381A - Id card - Google Patents

Abstract

PURPOSE:To protect a transfer image for a long period with excellent durability by providing an image receiving layer for receiving dye to form the image and an ultraviolet curing protective layer on one surface of a support so that a critical surface tension at ordinary temperature of a layer to be adhered to the protective layer at the receiving layer reaches a specific value. CONSTITUTION:An image receiving layer for receiving dye to form a transfer image and an ultraviolet curing protective layer are sequentially provided in this order on one surface of a support so that a critical surface tension at ordinary temperature of a layer to be adhered to the protective layer at the receiving layer becomes 34-50dyn/cm. As a result, there is obtained an ID card which is adapted for a mass production and improves adhesive properties at the protective layer to provide excellent durability without peeling protective layer even in the case of using for a long period and to protect the transfer image for the long period, thereby effectively preserving important personal information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ID card,
More specifically, it is suitable for mass production, has excellent durability, and can protect the transferred image formed on the image receiving layer for a long period of time without peeling off the formed ultraviolet-curing protective layer. The present invention relates to an ID card capable of reliably storing data.

[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, and further, a protective layer on the surface. Is provided. Formation of a facial photograph by the silver salt photography method requires complicated multi-step processes such as exposure, development, fixing, and bleaching, and at a site where a large amount of ID cards must be produced quickly. Is not always appropriate.

Under these circumstances, on the surface of the support,
An image receiving layer on which a transfer image such as an image containing gradation information is formed by a sublimation type thermal transfer recording method or an image containing character information is formed by a heat melting type thermal transfer recording method is provided, and further, the entire surface of the transferred image in the image receiving layer is provided. An ID card, which is suitable for mass production and is convenient, has been proposed in which a hard UV-curable protective layer is provided by applying a UV-curable resin and irradiating it with UV light.

However, for the purpose of preventing heat fusion between the image receiving layer and the thermal transfer recording ink sheet when the transfer image is formed on the image receiving layer of these ID cards by using the thermal transfer recording ink sheet. Since a peeling agent such as silicon is added, and the critical surface tension of the image receiving layer is reduced, the adhesive force between the image receiving layer of the ID card and the ultraviolet curing protective layer formed on the surface of the image receiving layer is insufficient. When the ID card was used for a long period of time, the UV-curable protective layer sometimes peeled off. In such a case, the transferred image formed on the image receiving layer cannot be protected, important personal information is lost, or the ID card is not strong enough for practical use, and may be broken or damaged. There is.

The present invention solves the above problems, is suitable for mass production, has excellent durability without peeling off the ultraviolet curing protective layer even after long-term use, and protects a transferred image for a long period of time. However, it is an object of the present invention to provide an ID card that can securely store important personal information.

[0006]

Means for Solving the Problems As a result of intensive studies made by the present inventors in order to achieve the above-mentioned object, a layer of the image receiving layer, which is adhered to the ultraviolet curing protective layer, and an image receiving layer and an ultraviolet curing protective layer, are formed. When a transparent protective layer is provided between the transparent protective layer and the layer that adheres to the UV-curable protective layer, the layer having a specific critical surface tension improves the adhesion between the transparent protective layer and the UV-curable protective layer. The present invention has been completed and found that the peeling of the UV-curable protective layer can be effectively prevented, and the present invention has been reached.

That is, in the invention described in claim 1, an image receiving layer for receiving a dye to form a transferred image and an ultraviolet curing protective layer are provided in this order on one surface of the support, An ID card characterized in that a critical surface tension at room temperature of a layer of the image receiving layer, which is adhered to the UV-curable protective layer, is 34 to 50 dyne / cm. On the surface of which an image receiving layer that receives a dye to form a transferred image, a transparent protective layer, and an ultraviolet curing protective layer are provided in this order, and the layer of the transparent protective layer that is bonded to the ultraviolet curing protective layer at room temperature In the invention according to claim 3, wherein the critical surface tension in the transparent protective layer is 34 to 50 dyne / cm, the layer of the transparent protective layer that adheres to the ultraviolet curing protective layer contains polyvinyl acetal. Will do The ID card according to claim 2, wherein the invention according to claim 4 is characterized in that the ultraviolet curing protective layer is made of an ultraviolet curable resin containing an epoxy group. The ID card described in 1.

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

The ID card according to the present invention comprises an image receiving layer (1), a transparent protective layer (2), a support (3), an intermediate layer (4) optionally formed, and an ultraviolet curing protective layer (5). And a writing layer (6) formed as necessary.

(1) Image Receiving Layer In this ID card, the critical surface tension at room temperature of the layer of the image receiving layer that is adhered to the ultraviolet curing protective layer is 34 to
It is 50 dyne / cm, preferably 37 to 44 dyne / cm. When the critical surface tension is less than 34 dyne / cm, the adhesiveness with the UV-curable protective layer may be deteriorated and the UV-curable protective layer may peel off. On the other hand, if it exceeds 50 dyne / cm, the coating liquid for forming the UV-curable protective layer causes back line around the rear end of the ID card during coating, resulting in substantially uncured or bubbles or wrinkles on the rear end. Etc. may occur. The critical surface tension can be determined by measuring the contact angle when liquids having different surface tensions are dropped on the surface of the layer that is bonded to the UV-curable protective layer. In the present invention, it is preferable that the adhesive force between the image receiving layer and the ultraviolet curing protective layer is relatively larger than the adhesive force between other layers in the ID card.

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, and may contain a metal ion-containing compound described below and, if necessary, various additives. 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.

<Binder for image receiving layer> The binder for the image receiving layer is not particularly limited, and various resins known per se 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 resin, polyvinyl Alcohol, polycarbonate, cellulose triacetate, polystyrene, copolymers of styrene and other monomers (for example, acrylic ester, acrylonitrile, ethylene chloride, etc.), vinyl toluene acrylate resin, polyurethane resin, polyamide resin, urea resin, epoxy resin, Examples thereof include phenoxy resin, polycaprolactone resin, polyacrylonitrile resin, and modified products thereof.

Among these, polyvinyl chloride resins, copolymers of vinyl chloride and other monomers, polyester resins, polyvinyl acetal resins, copolymers of styrene and other monomers, and epoxy resins are preferable. 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 separation between the image-forming 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 those called silicone resin), polyethylene wax, amide wax, Teflon powder, fluorine-based and phosphoric ester-based surface active agents. Examples thereof include agents, 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 in general, it is usually 0.1 to the image receiving layer binder. ~ 30% by weight
And 0.5 to 20% by weight is preferable.

Examples of the curing reaction-type silicone oil include reaction-curing type (residual curing of amino-modified silicone oil and epoxy-modified silicone oil), photo-curing type, catalyst-curing type and the like. 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 usually 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.

The metal ions constituting the metal ion-containing compound are those belonging to Groups I to VIII of the periodic table.
Valent and polyvalent metals are listed, among which A
l, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Sn, Ti and Zn
Are preferable, and Ni, Cu, Co, Cr and Zn are particularly preferable.

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

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

In the above formula, L is a counter anion capable of forming a complex. Specific examples 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. Among these, tetraphenylboron anion and its derivative, and alkylbenzene sulfonate anion and its derivative are preferable.

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
It depends on whether it is hexadentate, or Q1, Q2,
Determined by the number of Q3 ligands. p represents 1, 2 or 3.

Examples of this type of metal ion-containing compound include:
Mention may be made of those exemplified in U.S. 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
~ 10 g / m ² is preferred.

<Additives> The image-receiving layer contains an antioxidant, an ultraviolet absorber, a light stabilizer, a filler (inorganic fine particles, organic resin particles), a pigment, and a sensitizer which is a plasticizer or a heat-melting substance. Etc. may be contained as an additive.

As the above-mentioned antioxidant, JP-A-59-18278
No. 5, No. 60-130735, JP-A No. 1-127387, and other antioxidants, and compounds known to improve the image durability of photographs and other image recording materials can be mentioned.

Examples of the ultraviolet absorber and the light stabilizer include JP-A-59-158287, JP-A-63-74686, and JP-A-63-145089.
No. 59, 19692, 62-229594, 63-122596, 63
The compounds described in JP-A No. 61-283595 and JP-A No. 1-204788, and compounds known as those for improving image durability in photographs and other image recording materials can be mentioned.

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.

As the plasticizer, 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, montan C, waxes such as amide waxes, ester gum, rosin-maleic acid resins, rosin derivatives such as rosin phenolic resins, phenol resins,
Ketone resin, epoxy resin, diallyl phthalate resin,
Polymer compounds represented by terpene resins, aliphatic hydrocarbon resins, cyclopentadiene resins, polyolefin resins, polyolefin oxides such as polyethylene glycol and polypropylene glycol, and the like can be given. In the present invention, the heat-meltable substance is preferably a compound having a melting point or softening point of 10 to 150 ° C.

In the present invention, the total amount of the above additives is usually 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, and applying the coating solution for the image-receiving layer to the support. 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 on the entire surface of one surface of the support or may be formed on a part thereof, but in the present invention, it is formed on a part of the support. Those are preferable.

--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 the heat-melt recording method (heat-melt transfer recording ink sheet), or the heat-diffusible dye-containing ink layer used in the heat diffusion transfer method. And the like (ink sheet for thermal diffusion transfer recording). Of these, a gradation information-containing image or the like can be usually formed by a thermal diffusion transfer recording ink sheet, and a character information-containing image can be formed by a thermal diffusion transfer recording ink sheet or a thermal fusion type transfer recording ink sheet. .

The thermal diffusion transfer recording ink sheet and the thermal fusion transfer recording ink sheet will be described below.

{Ink Sheet for Thermal Diffusion Transfer Recording} = 1 = Support Material The support material is not particularly limited as long as it has a good dimensional stability and can withstand heat during recording by a thermal head. Absent. For example, condenser paper, thin paper such as glassine paper, polyethylene terephthalate, polyethylene naphthalate, polyamide, polyimide, polycarbonate,
Examples thereof include heat resistant plastic films such as polysulfone, polyvinyl alcohol cellophane, and polystyrene.

The thickness of the support is preferably 2 to 10 μm. The shape of the support is not particularly limited,
For example, the shape may be a wide sheet or film, a narrow tape or card, or 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-59-78896.
No. 59, No. 227948, No. 60-24966, No. 60-
53563, 60-130735, 60-131292, 60-239289, 61-19396, 61-2299.
No. 3, No. 61-31292, No. 61-31467, No. 61-
35994 publication, 61-49893 publication, 61-148269 publication,
No. 62-191191, No. 63-91288, No. 63-91287, No. 63-290793 such as naphthoquinone dyes, anthraquinone dyes, azomethine dyes and the like can be mentioned. .

As the magenta dye, JP-A-59-788 is available.
No. 96, JP 60-30392, JP 60-30394, JP 60-253595, JP 61-262190,
JP 63-5992 JP, JP 63-205288 JP, JP Sho
Examples thereof include anthraquinone dyes, azo dyes, azomethine dyes, and the like described in JP-A Nos. 64-159 and 64-63194.

As the yellow dye, there is disclosed in JP-A-59-788.
No. 96, JP 60-27594 JP, JP 60-31560 JP, JP 60-53565 JP, JP 61-12394 JP, JP 63-122594 etc. Examples thereof include methine dyes, azo dyes, quinophthalone dyes, and anthryothothiazole dyes described in each publication.

Particularly preferable as the heat-diffusible dye is a compound having an active methylene group of open chain type or closed type by a coupling reaction with an oxidized form of a p-phenylenediamine derivative or an oxidized form of a p-aminophenol derivative. An indoaniline dye obtained by a coupling reaction with the resulting azomethine dye and an oxidized form of a phenol or naphthol derivative or a p-phenylenediamine derivative or an oxidized form of a p-aminophenol derivative.

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 forming a chelate with the metal ion-containing compound is not particularly limited, and various compounds known per se can be appropriately selected and used. Specifically, for example, JP-A-59-78893 and 59-109.
No. 349, Japanese Patent Application No. 2-213303, No. 2-214719, No. 2-20374
Examples thereof include a cyan image forming dye (hereinafter referred to as a cyan dye), a magenta image forming dye (hereinafter referred to as a magenta dye), and a yellow image forming dye (hereinafter referred to as a yellow dye) described in No. 2.

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.

[0057]

[Chemical 1]

However, in the above formula, X ¹ 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, At least one of the adjacent positions of the carbon atoms bonded to the azo bond is a nitrogen atom or a carbon atom substituted with a chelating group. X ² 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.

Typical specific examples of the compound represented by the above general formula are shown below, but the invention is not limited thereto.

The cyan dyes are shown below.

[0061]

[Chemical 2]

The magenta dyes are shown below.

[0063]

[Chemical 3]

The yellow dyes are shown below.

[0065]

[Chemical 4]

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

The amount of the heat diffusing dye used is usually 0.1 to 20 g per 1 m ² of the support of the ink sheet, and 0.2
~ 5g is preferred.

= 2.2 = Binder Examples of the binder include 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, and 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 are excellent in storage stability, are preferable. One of the various binders may be used alone, or two or more thereof may be used in combination. The weight ratio of the binder to the heat diffusible dye is preferably 1:10 to 10: 1, and particularly preferably in the range of 2: 8 to 7: 3.

= 2.3 = Other optional components 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 releasable compounds such as waxes, fine metal powders, silica gel, metal oxides. Substances, carbon black, fillers such as resin fine powder, and curing agents capable of reacting with the 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 structure of the thermal diffusion transfer recording ink sheet is not limited to a two-layer structure including a support and an ink layer, and may be a structure in which other layers are 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 of the ID card and settling (blocking) of the heat diffusing dye.

Further, the support may be provided with an undercoat layer for the purpose of improving the adhesiveness with the binder and preventing the transfer and dyeing of the dye to the support side. A sticking prevention layer may be provided on the back surface of the support (on the side opposite to the ink layer) for the purpose of preventing fusing or sticking of the head to the support and wrinkling of the ink sheet for thermal diffusion transfer recording. .

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

{Production of Ink Sheet for Thermal Diffusion Transfer Recording}
The thermal diffusion transfer recording ink sheet, an ink layer-forming coating liquid prepared by dispersing or dissolving the various components forming the ink layer in a solvent, to coat the surface of the support, It can be produced by drying.

The binders are 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, normal butyl acetate, etc. can be mentioned.

Examples of the above-mentioned coating method include conventionally known surface-sequential separate coating 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 containing a binder and a yellow dye. An ink 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. It may have been done. Further, in addition to the three ink layers arranged along the plane direction, a black ink layer containing a black image forming substance may be interposed. Regarding 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 contains
Convenience during use can be achieved by forming perforations or providing detection marks for detecting the positions of areas having different hues.

--Formation of Gradation Information-Containing Image Using Thermal Diffusion Transfer Recording Ink Sheet ---- For the gradation information containing image, for example, the ink layer of the thermal diffusion transfer recording ink sheet and the image receiving layer of the ID card are superimposed. , Can be formed by applying imagewise thermal energy to the interface between the ink layer and the image receiving layer. 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 the 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 a thermal head is used as a heat source for applying heat energy, the applied heat energy can be changed continuously or in multiple steps by modulating the voltage or pulse width applied to the thermal head.

When laser light is used as a heat source for giving heat energy, the heat energy to be given can be changed by changing the light quantity 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 laser light is used as the heat source, it is advisable to bring the ink sheet for thermal diffusion transfer recording into close contact with the image receiving layer.

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 an infrared flash lamp is used as a heat source for providing heat energy, it is preferable to heat the layer 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 priority is given, it is desirable to carry out from the thermal diffusion transfer recording ink sheet side.

By the thermal transfer recording described above, an image of one color can be recorded on the image receiving layer of the ID card. However, according to the following method, it is also possible to obtain a color image having a color photographic tone 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-separated image is thermally transferred using the yellow area, and then the magenta color-separated image is thermally transferred using the magenta area. And, if necessary, a method of thermally transferring a black color-separated image in order is adopted. This method can also obtain a color image of a color photographic tone, but more advantageously, this method has an advantage that the above-mentioned heat transfer recording heat-sensitive sheet replacement is unnecessary.

Further, after forming an image by the method described above, heat treatment may be carried out by the method described above 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 into the image receiving layer, it is effective and preferable to heat from the support side of the image receiving layer.

An image containing gradation information can be formed on the image receiving layer as described above.

{Heat-melting type heat-sensitive transfer ink sheet} Also,
To produce the ID card of the present invention, the heat-melting type heat-sensitive transfer ink sheet of the present invention can be used. This heat-melting type heat-sensitive transfer ink sheet is obtained by laminating a specific heat-melting ink layer on a support in this order, and optionally interposing a release layer between the support and the heat-melting ink layer. Can be formed. The heat-melting type heat-sensitive transfer ink sheet may have layers other than the above-mentioned layers as long as the characteristics thereof are not impaired. For example, an intermediate layer or the like may be laminated between the release layer and the ink sheet support, and another layer is laminated on the heat-meltable ink layer such as providing an ink protective layer on the outermost layer. May be. Further, the release layer and the heat-meltable ink layer, if necessary,
It may have a multilayer structure.

= 1 = Support The support in the heat-melting type heat-sensitive transfer ink sheet preferably has good heat resistance and high dimensional stability. Examples of the material include, for example, JP-A-63-193886.
The films or sheets described on page 2, lower left column, lines 12 to 18 can be used.

The thickness of the support is usually 30 μm or less, preferably 2 to 30 μm. When the thickness of the support is more than 30 μm, the thermal conductivity may be deteriorated and the print quality may be deteriorated.

In this heat-melting type thermal transfer ink sheet, the constitution of the back side of the support is arbitrary, and a backing layer is provided for the purpose of, for example, running stability, antistatic and heat resistance. Good.

= 2 = Heat-meltable ink layer The heat-meltable ink layer contains a coloring material, and contains a heat-melting compound, a thermoplastic resin, and the like to bind these materials. Further, the heat-meltable ink layer may contain various additives as required.

= 2.1 = Coloring Material The coloring material used as a component of the heat-melting ink layer is usually used for the heat-melting ink layer of this kind of heat-melting type thermal transfer ink sheet. Can be used without limitation. For example, the pigments such as inorganic pigments and organic pigments described in JP-A-63-193886, page 5, upper right column, lines 3 to 15, and dyes such as organic dyes can be used. Can be mentioned. These various coloring materials may be used alone or in combination of two or more if necessary.

= 2.2 = thermoplastic resin The thermoplastic resin used as a component of the thermofusible ink layer is usually used for the thermofusible ink layer of this type of thermofusible thermal transfer ink sheet. It is possible to use various types such as those described in JP-A-63-193886.
The substances exemplified in page 4, upper right column, page 5, upper left column, line 18 can be mentioned.

However, it is preferable that the thermoplastic resin has a melting point such that it is not softened by the heating temperature when the transparent protective layer is formed by hot stamping. Considering the heating temperature, the softening point of the thermoplastic resin used is
It is preferably 80 ° C or higher, and more preferably 90 ° C or higher. It is desirable to select and use a thermoplastic resin having such a softening point from known thermoplastic resins.

= 2.3 = Heat-melting compound Generally, as the heat-melting compound, those used for the heat-melting ink layer of the heat-melting type thermal transfer ink sheet of this kind may be optionally used. it can. Specifically, low molecular weight products of thermoplastic resins such as polystyrene resin, acrylic resin, styrene-acrylic resin, polyester resin, polyurethane resin, etc., from page 8, upper left column, line 8 of JP-A-63-193886. The substances listed as examples can be listed up to the 12th line in the upper right column of the page. In addition to these, rosin, hydrogenated rosin, polymerized rosin, rosin-modified glycerin, rosin-modified maleic acid resin, rosin-modified polyester resin, rosin-modified phenolic resins and rosin derivatives such as ester gum, and phenolic resins, terpene resins, ketones. Resins, cyclopentadiene resins, aromatic hydrocarbon resins and the like can be mentioned.

The molecular weight of these heat-meltable compounds is usually 10,000 or less, preferably 5,000 or less, and the melting point or softening point is preferably 50 to 150 ° C., particularly 90 to 1
20 ° C is preferred. The heat fusible compounds may be used alone or in combination of two or more.

= 2.4 = Additional component Other additive components other than those described above can be appropriately added to the heat-meltable ink layer, if necessary, within a range not impairing the object of the present invention. For example, this heat-meltable ink layer may contain a fluorine-based surfactant. By containing the fluorine-based surfactant, the blocking phenomenon of the heat-meltable ink layer can be prevented. It is also effective to add an incompatible resin or the like in order to improve the sharpness of the transferred character information-containing image, that is, the breakage of character boundaries. Further, in order to prevent the image containing the character information from being crushed, non-softening fine powder may be added.

= 2.5 = thickness of heat-meltable ink layer and method for forming the same-The thickness of the heat-meltable ink layer is usually 0.6 to 5.0 μm, preferably 1.0 to 4.0 μm.

This hot-melt ink layer is applied by dispersing or dissolving the forming components in an organic solvent (organic solvent method), or by applying a thermoplastic resin or the like in a softened or melted state by heating (hot melt). The coating may be performed by using a coating method) or the like, but it is preferable that the coating is performed using an emulsion or a solution in which the forming components are dispersed or dissolved in water or an organic solvent.

The total content of the layer-forming components in the coating liquid used for coating the heat-meltable ink layer is usually set within the range of 5 to 50% by weight.

As a coating method, a usual method can be used. Examples of the coating method include a method using a wire bar, a squeeze coating method and a gravure coating method.

The heat-meltable ink layer needs to be provided in at least one layer. For example, the type and content of the coloring material, the compounding ratio of the thermoplastic resin and the heat-meltable compound, etc. You may comprise by laminating | stacking two or more different heat-meltable ink layers.

= 3 = Peeling Layer The peeling layer is a layer (of this layer) provided at least on the peeling layer when heated by a heating mechanism such as a thermal head for image transfer during image formation. At least one layer is a heat-fusible ink layer containing a coloring material.) It peels / transfers sufficiently quickly, and at the same time, it is melted by heating when forming a transparent protective layer by hot stamping, and is melted on the image receiving layer. Is provided for the purpose of coating the transfer image containing the non-softening fine particles and protecting the transfer image. The heat-melting compound containing a heat-melting compound suitable for achieving this object is added. It is constituted as a layer in which the attribute of is dominant, particularly a layer having excellent peelability.

The release layer may be composed of the heat-melting compound itself described in the above = 2.3 =, but usually, the heat-melting compound and / or a binder resin such as a thermoplastic resin is used. It is preferable to be composed of

As the heat-fusible compound used as the main component of the release layer, various compounds such as known ones may be appropriately selected and used. Specific examples thereof include, for example, JP-A-63-193886. The exemplified substances can be used from page 4, upper left column, line 8 to page 12, upper right column, line 12 of the publication.
Among these, carnauba wax, microcrystalline wax, and paraffin wax are preferable.

The hot-melt compound used in the present invention usually has a melting point of 80 ° C. or higher, preferably 90 to 120 ° C. When the melting point is less than 80 ° C., the image containing character information may be crushed during the hot stamping. In addition, these heat-fusible compounds may be used alone or in combination of two or more.

Examples of the thermoplastic resin include ethylene-based copolymers such as ethylene-vinyl acetate-based resin,
Examples thereof include polyamide resin, polyester resin, polyurethane resin, polyolefin resin, acrylic resin and cellulose resin. Out of this
For example, vinyl chloride resin, rosin resin, petroleum resin and ionomer resin, natural rubber, styrene butadiene rubber, isoprene rubber, chloroprene rubber and other elastomers, ester gum, rosin maleic acid resin, rosin phenol resin and water. A rosin derivative such as an added rosin, a phenol resin, a terpene resin, a cyclopentadiene resin, an aromatic resin, or the like can be used depending on the case. Among these, ethylene-based copolymers such as ethylene-vinyl acetate copolymer or ethylene-vinyl acetate-based copolymer, and cellulose-based resin are preferable.

In the present invention, the thermoplastic resin used as a component of the release layer usually has a melting point or softening point of 50 to 50 among the various thermoplastic resins exemplified above.
Those having a temperature in the range of 150 ° C., particularly 60 to 120 ° C., or those having a temperature within the range by mixing two or more kinds can be preferably used.

The release layer may optionally contain a colorant. When the release layer contains the coloring agent, the content thereof is usually 30% by weight or less, preferably 20% by weight or less, based on all the components of the release layer. The colorant is not particularly limited and may be “(C.
The same colorants as those described in the section "1.2) Hot-melt ink layer" can be used.

In addition to the above-mentioned components, the release layer may further contain other components within the range not impairing the object of the present invention, if necessary. Examples of the other components include higher fatty acids, higher alcohols, higher fatty acid esters, amides and higher amines. When these are used, they may be used alone or in combination of two or more.

The thickness of the release layer is usually 0.2 to 4 μm.
And 0.2 to 2.5 μm is preferable.

{Production of heat-melting type heat-sensitive transfer ink sheet} In the heat-melting type heat-sensitive transfer ink sheet, basically, each component forming the heat-meltable ink layer is dispersed or dissolved on the surface of the ink sheet support. It can be formed by applying a coating liquid for forming a heat-meltable ink layer and drying.

--- Formation of Image Containing Character Information by Heat Melt-Type Thermosensitive Transfer Ink Sheet --- The heat-melt transfer method using the heat-melt type heat-sensitive transfer ink sheet is not different from the usual heat-sensitive transfer recording method. A case where the most typical thermal head is used as a heat source will be described as an example.

First, the heat-melting ink layer of the heat-melting type heat-sensitive transfer ink sheet and the image-receiving layer surface of the substrate are brought into close contact with each other, and if necessary, a heat pulse is applied to the heat-melting ink layer by a thermal head to obtain a desired temperature. The heat-meltable ink layer corresponding to the printing or transfer pattern is locally heated. The heated portion of the heat-meltable ink layer rises in temperature and is quickly softened and transferred to the image receiving surface of the substrate.

The formation of the non-gradation information containing image which does not require the gradation of the characters, figures, symbols or ruled lines may be performed prior to the formation of the above gradation information containing image, The non-gradation information containing image may be formed after the gradation information containing image is formed.

As described above, the non-softening fine particles are contained on the surface of the image receiving layer, and the volume change with pressure is small,
It is possible to form a character information-containing image that is not crushed even when compressed. That is, when the transparent protective layer is formed on the surface of the image receiving layer by hot stamping, clear and beautiful printing can be performed without destroying the dye of the transferred image. Also, this heat-melting type thermal transfer ink sheet is 300d
It can also be used for printing with high-resolution thermal heads of pi or higher.

(2) Transparent protective layer When a transparent protective layer is formed on the surface of the image receiving layer, the critical surface tension at room temperature of the layer of the transparent protective layer which is adhered to the UV-curable protective layer is 34 to 50 dyne / cm. , 36 ~ 42
dyne / cm is preferred. The critical surface tension is 34 dyne / cm
If it is less than the above range, the adhesiveness to the UV-curable protective layer may be deteriorated and the UV-curable protective layer may peel off. On the other hand, 50
If it exceeds dyne / cm, the coating liquid for forming the UV-curable protective layer will cause a line around the rear edge of the ID card during coating,
It may become substantially uncured, or bubbles or wrinkles may occur at the rear end. The critical surface tension can be determined by measuring the contact angle when liquids having different surface tensions are dropped on the surface of the layer that adheres to the ultraviolet curing protective layer. In the present invention, it is preferable that the adhesive force between the image receiving layer or the ultraviolet curing protective layer and the transparent protective layer is relatively larger than the adhesive force between other layers in the ID card.

As a method of increasing the adhesive force, for example, a similar polymer which is easily fused by heat is used, and a compound having a polar group such as a carboxyl group, a hydroxyl group or an amino group so as to form an ionic bond. Can be achieved by adjusting the conditions such as pressure, temperature and time for forming the layer.

Examples of the transparent protective layer satisfying the above requirements include transparent protective layer forming substances such as polyvinyl acetoacetal, polyvinyl butyral, epoxy resin, acrylic resin, polystyrene resin, styrene acrylic resin, and cellulose resin such as ethyl cellulose. A layer containing a. These substances may be used alone or in combination of two or more. Among these, a layer containing polyvinyl acetoacetal is preferable.

The content of the transparent protective layer forming substance in the transparent protective layer is 10 to 90% by weight, preferably 30 to 70% by weight, and particularly preferably 40 to 60% by weight. When the content of the transparent protective layer-forming substance exceeds 90% by weight, the critical surface tension of the layer of the transparent protective layer, which is adhered to the UV-curable protective layer, at room temperature increases, which is defined by the present invention.
The value may be outside the range of 34 to 50 dyne / cm. on the other hand,
When it is less than 10% by weight, the critical surface tension becomes small and the value may fall outside the range of the present invention.

The transparent protective layer forming substance may be a newly synthesized one or a commercially available one.

The components other than the transparent protective layer-forming substance contained in the transparent protective layer are not particularly limited, and various components can be contained as long as they do not impair the object of the present invention.

The transparent protective layer 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.

An ultraviolet absorber may be contained in the transparent protective layer. The ultraviolet absorbent is effective in irradiating a coating agent containing an ultraviolet curable prepolymer with ultraviolet rays to protect image information from ultraviolet rays when curing the same or sunlight during long-term storage.
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 amount of the ultraviolet absorber added depends on the kind, but is usually 0.6 g / m ² or more, and preferably 1 g / m ² or more.

The transparent protective layer may be formed of a single layer or two or more layers, but in the present invention, it is preferably formed of a plurality of layers, and specifically, It is preferable that the layer in contact with the ultraviolet curing protective layer in the transparent protective layer contains the transparent protective layer forming substance. In such a case, the adhesive force with the ultraviolet curing protective layer can be improved.

The thickness of the transparent protective layer is usually 0.5 to 20.0 μm in consideration of the uniform coating property of the ultraviolet curing protective layer.
And 1.0 to 10.0 μm is preferable.

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

In the support, white pigments such as titanium white, magnesium carbonate, zinc oxide, barium sulfate, silica, talc, clay and calcium carbonate 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 1,0.
00 μm, preferably 100-800 μm, especially 200-800 μm
m is preferred.

If necessary, the support may be provided with embossing, signature, IC memory, optical memory, bar code, magnetic recording layer, other printing and the like.

(4) Intermediate Layer In the present invention, an intermediate layer can be provided between the image receiving layer and the support, if necessary. The intermediate layer can maintain the form of an ID card and is not particularly limited as long as its mechanical strength is not lowered, and can be formed by selecting various materials and methods.

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 more than that between other layers. It is preferably formed so as to be relatively small.
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

As the adhesive strength of the intermediate layer, the adhesive strength between the intermediate layer and the support and the adhesive strength between the intermediate layer and the image receiving layer are relatively smaller than the adhesive strength between the other layers. In this case, the adhesive force between the intermediate layer and the support may be the same as the adhesive force between the intermediate layer and the support, or the adhesive force may be different from each other. However, it is more preferable that the adhesive force between the intermediate layer and the image receiving layer is relatively smaller than the adhesive force between the intermediate layer and the support.

As a method of reducing the adhesive force at the interface of the intermediate layer, for example, avoid using a similar polymer which is easily fused by heat, and do not use a compound having a polar group so as to form an ionic bond. It can be achieved by adjusting the conditions such as pressure, temperature and time when forming the layer.

The intermediate layer is, for example, a resin having a low softening point,
It can be formed by applying a liquid in which a tackifier or the like is mixed with a heat-melting substance and / or a thermoplastic substance onto the surface of the support.

Examples of the resin having a low softening point used for 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 or rosin tackifiers, water-added rosin tackifiers, rosin maleic acid tackifiers, polymerized rosin tackifiers and rosin phenol tackifiers. Examples thereof include modified rosin-based tackifiers, terpene-based tackifiers, petroleum resin-based tackifiers and modified tackifiers thereof.

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) Ultraviolet Curing Protective Layer The ultraviolet curing protective layer contains a resin or a resin composition appropriately selected from various ultraviolet curable resins or ultraviolet curable resin compositions described below, and an ultraviolet absorbing substance. It can be formed by applying the contained coating agent for forming a UV-curable protective layer on the surface of the image-receiving layer described later and irradiating it with UV rays.

Examples of the ultraviolet curable resin or the ultraviolet curable resin composition include an epoxy resin or a resin composition containing an epoxy type resin as a main component. The epoxy type resin is preferable in that it has a small volumetric shrinkage before and after curing and is unlikely to curl, and has good adhesiveness to the image receiving layer or the transparent protective layer.

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

Examples of the UV-curable prepolymers and monomers include the types in which polymerization is caused by radical polymerization (mainly acrylate type) and the types in which polymerization is caused by cationic polymerization (mainly epoxy type). 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 are described below.

Examples of the epoxy-based prepolymers and monomers include prepolymers 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 polymerization initiator is preferably a cationic polymerization initiator, and specific examples thereof include aromatic onium salts.

As the aromatic onium salt, there may be mentioned V
Salts of Group a elements, such as phosphonium salts (eg, triphenylphenacylphosphonium hexafluorophosphate), Group VIa elements, such as sulfonium salts (eg, triphenylsulfonium tetrafluoroborate, triphenylsulfonium hexafluorophosphate) , Tris (4-thiomethoxyphenyl) hexafluorophosphate, sulfonium and triphenylsulfonium hexisafluoroantimonate), and salts of Group VIIa elements, such as iodonium salts (such as diphenyliodonium chloride). it can.

The use of such an aromatic onium salt as a cationic polymerization initiator in the polymerization of an epoxy compound is described in detail in US Pat. Nos. 4,058,401, 4,069,055, 4,101,513 and 4,161,478. Has been done.

Preferred cationic polymerization initiators include
Examples thereof 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.

In the coating agent for the UV-curable protective layer, there are further added 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.

In the coating agent for the UV-curable protective layer, there may be further added, for example, vinyl monomers such as styrene, paramethylstyrene, methacrylic acid ester, acrylic acid ester, cellulose type, thermoplastic polyester, phenylglycidyl ether, and 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.

In the UV-curable protective layer coating agent, dyes, pigments, thickeners, plasticizers, stabilizers, leveling agents, coupling agents, tackifiers, silicone group-containing active ingredients are used as inactive ingredients. Agents, wetting improvers such as fluorocarbon group-containing surfactants, other various additives, further for the purpose of improving the fluidity during coating of the coating agent, acetone, methyl ethyl ketone, which hardly reacts with the cationic polymerization initiator, A small amount of solvent such as methyl chloride may be contained.

Further, the UV-curable protective layer may contain the following fine particles, for example. 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 of 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.

Further, 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. .

In order to make the surface of the UV-curable protective layer uneven, for example, the UV-curable protective layer is coated with a plate having a gravure pattern of a specific pattern. 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, examples of the irradiation of ultraviolet rays include irradiation of sunlight, irradiation of a low-pressure mercury lamp, irradiation of a high-pressure mercury lamp, irradiation of an ultra-high-pressure mercury lamp, irradiation of carbon arc, etc., irradiation by a metal halide lamp, irradiation of a xenon lamp and the like. . Also, depending on the case, high energy rays such as electron rays may be used.

During curing, heating the coating film of the coating agent for the ultraviolet curing protective layer before or after irradiation with ultraviolet rays can shorten the curing time.

The UV-curable protective layer in the present invention is directly formed on the surface of the image-receiving layer on which the transferred image is formed.

(6) Writing Layer The writing layer is a layer which allows writing on the back surface of the ID card. As the writing layer, for example, a “writing layer” described in JP-A 1-205155 can be formed. The writing layer is a support,
It is formed on the surface on which a plurality of layers are not stacked.

<< Production of ID Card >> ID according to the present invention
The card can be manufactured as follows. That is, as described above, the image receiving layer in the ID card and the ink layer in the sublimation-type thermal transfer recording ink sheet are superposed, and are heated imagewise by a heat source such as a thermal head to diffuse the heat diffusible dye into the image receiving layer. An image containing gradation information is formed by moving the image. 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 melting ink sheet, Thermally transfer various characters. A transparent protective layer is formed on the surface of the image-receiving layer on which the gradation information-containing image is formed as described above, by a coating method, a hot stamp method using a transparent sheet, or another method. 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 ID card thus obtained is suitable for mass production, and by improving the adhesiveness of the hard UV protective layer formed on the surface thereof, the UV curable protective layer peels off even after long-term use. In addition to being excellent in durability, the formed transfer image can be protected for a long period of time and important personal information can be reliably stored.

[0180]

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 (ICI Corporation: Melinex 226) having a thickness of 50 μm on both sides.
m white polypropylene resin sheet (Mitsubishi Yuka Co., Ltd.)
(Manufactured by Noblene FL25HA) was heat-welded to obtain a wide composite resin sheet having a thickness of 450 μm. One surface of the obtained composite resin sheet was subjected to corona discharge treatment at 25 W / (m 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 is applied onto the surface of the support subjected to corona discharge treatment and dried to obtain a thickness.
A 0.5 μm intermediate layer was formed.

<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 parts-Image-receiving layer Formation-A first layer having the following composition on the surface of the formed intermediate layer:
The image-receiving layer was formed by laminating the coating solution for forming the image-receiving layer and the coating solution 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 (Compound MS-17 shown in the following (Chemical Formula 2)) 4 parts Methyl ethyl ketone 90 parts

[0185]

[Chemical 5]

<Coating Liquid for Forming Second Image Receiving Layer> Polyethylene wax emulsion (manufactured by Toho Chemical Industry Co., Ltd .: Hi-Tech E-11000) 2 parts Urethane-modified ethylene acrylic acid polymer emulsion (manufactured by Toho Chemical Industry Co., Ltd .: S-) 6254) 8 parts Methyl ethyl ketone 90 parts-Formation of writing layer-By applying a coating solution for forming a writing layer having the following composition on the surface of the support opposite to the image receiving layer and drying, a writing layer having a thickness of 40 μm was formed. .

<Coating liquid for writing layer formation> Colloidal silica 2.5 parts Gelatin 7.0 parts Hardener (compound represented by the following chemical formula 6) 0.2 parts Water 90.0 parts

[0188]

[Chemical 6]

{Production of thermal diffusion transfer recording ink sheet}
As a support, a polyethylene terephthalate sheet having a thickness of 1 μm was formed on a surface of a polyethylene terephthalate sheet having a thickness of 6 μm, which had been subjected to corona discharge treatment, by a wire bar coating method using three kinds of ink layer forming application liquids having the following compositions. Along the lengthwise direction of yellow (Y), magenta (M), and cyan (C) so that they are separately applied and then dried, and the silicone oil (X-41,
403A, manufactured by Shin-Etsu Silicone Co., Ltd.), drop 1 or 2 drops with a dropper and spread it over the entire surface, and apply a back surface treatment to Y, M,
An ink sheet for C3 color thermal transfer recording was obtained.

<Working liquid for forming yellow ink layer> Yellow disperse dye (MS Yellow, Mitsui Toatsu Dyestuff Co., Ltd.) 3 parts Polyvinyl butyral 5 parts (Polymerization degree 1700, Tg 85.5 ° C, degree of acetalization 64 mol%, Acetyl group 3 mol% or less, trade name BX-1, manufactured by Sekisui Chemical Co., Ltd. 0.4 part polyester modified silicone (manufactured by Shin-Etsu Chemical Co., Ltd .: trade name X-24-8310) 40 parts toluene 40 parts methyl ethyl ketone Dioxane 10 parts <Coating liquid for forming magenta ink layer> Magenta disperse dye (MS Magenta, Mitsui Toatsu dye) 5 parts Polyvinyl butyral 5 parts (Polymerization degree 1700, Tg85.5 ° C, degree of acetalization 64 mol%, acetyl group 3 mol% or less, trade name BX-1: manufactured by Sekisui Chemical Co., Ltd. 0.4 part polyester modified silicone (manufactured by Shin-Etsu Chemical Co., Ltd .: trade name X-24-8310) 40 parts toluene 40 parts methyl ethyl ketone <Cyanii Coating liquid for ink layer formation> Cyan disperse dye (Kayaset Blue 136, Nippon Kayaku Co., Ltd.) 4 parts Polyvinyl butyral 5 parts (Polymerization degree 1700, Tg85.5 ° C, acetalization degree 64 mol%, acetyl group 3 Mol% or less, trade name BX-1: manufactured by Sekisui Chemical Co., Ltd. 0.4 part polyester modified silicone (manufactured by Shin-Etsu Chemical Co., Ltd .: trade name X-24-8310) toluene 40 parts methyl ethyl ketone 40 parts dioxane 10 parts {Manufacture of heat-meltable ink sheet} The heat-meltable ink layer coating liquid is applied on one side of the surface of a polyethylene terephthalate sheet with a thickness of 4.5 μm by the wire bar method and dried to have a heat-meltability of 1.2 μm. An ink layer was formed.

An anti-sticking layer having a thickness of 0.6 μm was formed by applying an anti-sticking layer coating liquid having the following composition to the surface of the polyethylene terephthalate sheet opposite to the heat-meltable ink layer. .

<Composition of coating liquid for heat-meltable ink layer> Carnauba wax 1 part Ethylene-vinyl acetate copolymer (Mitsui DuPont Chemical EV 40Y) 1 part Carbon black 6 parts Phenolic resin (Arakawa Chemical Tamanor 521) 12 parts Methyl ethyl ketone 80 parts <Coating agent for anti-sticking layer> Nitrocellulose 3 parts Acrylic silicone resin 7 parts Methyl ethyl ketone 90 parts-Formation of transferred image-I in which an intermediate layer, an image receiving layer and a writing layer are provided on a support.
For cutting sublimation type thermal transfer recording, the D card laminated body is cut into a card size according to JIS standard, and the image receiving layer in the obtained ID card laminated body and the sublimation dye of the sublimation type thermal transfer ink sheet are superposed. Output from ink sheet side using thermal head 0.23W / dot, pulse width 0.3-
By heating under a condition of 4.5 msec and a dot density of 16 dots / mm, a gradational human face image 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 the human-face image, which was slightly larger than the human-face image.

-Transparent Protective Layer- On the surface of the formed image-receiving layer, a coating solution for bonding a transparent protective layer and a coating solution for forming a transparent protective layer A having the following composition were dried by a wire bar coating method to give a dried film having a thickness of A transparent protective layer A was formed by coating in this order so as to have a thickness of 2 μm and 0.3 μm, respectively, and drying.

<Coating Liquid for Adhesion of Transparent Protective Layer> Maleic anhydride-modified ethylene vinyl acetic acid (manufactured by Toyo Morton Co., Ltd .: VR-103) 10 parts Acrylic resin (manufactured by Mitsubishi Rayon Co., Ltd .: Dianal BR-87) 5 Part Styrene PMMA graft polymer (Toagosei Kagaku Kogyo Co., Ltd .: RESEDA GP-200) 5 parts Methyl ethyl ketone 80 parts <Coating liquid for forming transparent protective layer A> Polyvinyl butyral (Sekisui Chemical Co., Ltd .: S-REC BX-1) 40 Part Ethyl cellulose (Hercules: N type) 60 parts Methyl ethyl ketone 90 parts-UV curable protective layer-A coating liquid for forming a UV curable protective layer having the following composition was prepared.

<Ultraviolet Curing Protective Layer Forming Coating Liquid> Side chain type bisphenol A glycidyl ether 15 parts 3,4-epoxycyclohexylmethyl -3,4-epoxycyclohexanecarboxylate 70 parts Trimethylolpropane triglycidyl ether 15 parts Aromatic Sulfonium salt-based UV initiator 6 parts Next, on the surface of the transparent protective layer and the surface other than the transparent protective layer, a specific background pattern is applied so that the coating liquid for forming an ultraviolet curable protective layer has a coating amount of 15 g / m ^2. Was applied by a gravure roll coater having the above composition, and the ultraviolet curable protective layer-forming coating material was cured under the following curing conditions to form an ultraviolet curable protective layer.

Curing conditions; Light irradiation source: 60 W / cm ² high-pressure mercury lamp Irradiation distance: 10 cm Irradiation mode: 3 cm / min Optical scanning The obtained ID card was evaluated as follows, and the results are shown in Table 1.

<< Evaluation >><Critical surface tension> No. 19 of surface chemistry of polymers (industrial books)
As described from page 22 to page 22, the contact angle when various liquids having different surface tensions are dropped on the surface of the image-receiving layer or the transparent protective layer formed by a goniometer-type contact angle measuring device (Elmer Optical Co., Ltd. )), Draw a graph of surface tension (γ _L ) -cos θ, and obtain a linear relationship. Extrapolating this to cos θ = 1, the critical surface tension (γ
_C ) ask. That is, it is shown by the surface tension of the liquid when θ = 0. A mixed liquid of ethanol and water was used as the liquid having different surface tensions.

<Adhesiveness> -Bending test-Using a Scott type pinching tester according to JIS K 6772, a sample having a length of 80 mm and a width of 30 mm was bent at a bending cycle of 120 times / min, a bending stroke of 50 mm, and a gripping distance. 10m
m, a free grip opening width of 3.0 mm, a 500-fold bending test was carried out at room temperature, and the state of adhesiveness, peeling, cracks, creases, etc. of the UV-curable protective layer was visually evaluated according to the following criteria.

O: No abnormality is observed. Δ: Some abnormality is observed. X: Abnormality is observed.

-Tape peeling-a. A cellophane adhesive tape (manufactured by Nichiban Co., Ltd.) was strongly adhered to the surface of the cured UV-curable protective layer, and the cellophane adhesive tape was rapidly peeled from the surface, and then the peeled state was observed.

B. According to the method specified in JIS K5400 Gobang-eye tape method, on the surface of the cured protective layer,
Cut with a sharp edged knife such as a knife at an angle of 30 ° to make 100 1mm or 1.5mm gobangs (10 × 10) that reach the substrate, and at this time, measure the number of gobangs of the coating film that remained without peeling. . If the coating film has good adhesiveness as a whole, after making burlaps, stick a cellophane tape on the surface, peel off the tapes, and measure the number of peeled rubs in the thickness direction. Evaluated. The evaluation was performed based on the following evaluation score method.

10 points: When each cut is fine and both ends are smooth, and there is no peeling at the intersection of the cuts and the square at a glance 8 points: There is slight peeling at the intersection of the cuts and the square There is no peeling at a glance, and the area of the defect is within 5% of the total square area. 6 points ... There is peeling between both ends of the cut and the intersection, and the area of the defect is 5 of the total square area. 〜15% 4 points ・ ・ ・ Peeling width due to cuts is wide, and the area of defect is 15 ~ 35% of total square area 2 points ・ ・ ・ Peeling width due to cuts is wider than 4 points ,
The area of the missing part is 35 to 65% of the total square area 0 points ... The area of peeling is 65% or more of the total square area.

C. The sample having the cured UV-curing protective layer was immersed in tap water at 20 ° C. for 24 hours, and then b. The adhesion with the image was examined in the same manner as in.

(Example 2) An ID card was prepared in the same manner as in Example 1 except that the composition of the coating solution for forming the transparent protective layer A in Example 1 was changed as follows. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating Liquid for Forming Transparent Protective Layer A> Polyvinyl acetoacetal (manufactured by Sekisui Chemical Co., Ltd .: S-REC KS-1) 5 parts Ethyl cellulose (manufactured by Hercules: N type) 5 parts Methyl ethyl ketone 90 parts (Example 3) ) An ID card was prepared in the same manner as in Example 1 except that the same ultraviolet curable protective layer as in Example 1 was formed directly on the surface of the image receiving layer without forming the transparent protective layer 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.

(Example 4) An ID card was prepared in the same manner as in Example 2 except that the composition of the coating liquid for forming an ultraviolet-curing protective layer in Example 2 was changed as follows. Obtained I
The D 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> Pentaerythritol triacrylate 21 parts Pentaerythritol tetraacrylate 9 parts Urethane acrylate (Dainippon Ink and Chemicals Incorporated: Unidick 17-849) 70 parts Benzoin ethyl ether 5 Parts (Example 5) An ID card was prepared in the same manner as in Example 1 except that the composition of the coating liquid for forming the transparent protective layer A in Example 1 was changed as follows. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating Liquid for Forming Transparent Protective Layer A> Polyester resin (manufactured by Toyobo Co., Ltd .: Byron-300) 10 parts Methyl ethyl ketone 90 parts (Example 6) Composition of coating liquid for forming transparent protective layer A in Example 1 An ID card was prepared in the same manner as in Example 1 except that was replaced with the following. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating Liquid for Forming Transparent Protective Layer A> Polyvinyl acetoacetal (manufactured by Sekisui Chemical Co., Ltd .: S-REC KS-1 2 parts poly (acrylonitrile-butadiene) resin (Hiker 1002 manufactured by Goodyear Co., Ltd.) 8 parts methyl ethyl ketone 70 parts n-butyl acetate 20 parts (Example 7) An ID card was prepared in the same manner as in Example 1 except that the composition of the coating solution for forming the second image receiving layer in Example 1 was changed as follows. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating liquid for forming second image-receiving layer> Saturated polyester resin (K1294 manufactured by Toray Industries, Inc.) 4 parts Poly (acrylonitrile-butadiene) resin (Hiker 1002 manufactured by Goodyear Co., Ltd.) 5 parts Polyethylene wax emulsion (Toho Kagaku) Industrial Co., Ltd .: Hitec E-11000) 1 part Methyl ethyl ketone 90 parts (Example 8) The same as Example 2 except that the composition of the second image-receiving layer forming coating solution in Example 2 was changed as follows. And made an ID card. About the ID card obtained,
The same evaluation as in Example 1 was performed, and the results are shown in Table 1.

<Coating liquid for forming second image receiving layer> Polyester resin (manufactured by Toyobo Co., Ltd .: Byron-300) 10 parts Methyl ethyl ketone 70 parts Toluene 20 parts (Comparative Example 1) Coating for forming transparent protective layer A in Example 1 An ID card was prepared in the same manner as in Example 1 except that the coating solution was changed to 100 parts by weight of polystyrene (Idemitsu Petrochemical Co., Ltd .: Idemitsu Styrol GP US-300). The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

(Comparative Example 2) The composition of the second image-receiving layer-forming coating solution in Example 1 was changed as follows, and the transparent protective layer was not formed directly on the surface of the image-receiving layer. An ID card was prepared in the same manner as in Example 1 except that the same ultraviolet curing protective layer as in Example 1 was formed. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating Liquid for Forming Second Image Receiving Layer> Polyethylene wax emulsion (manufactured by Toho Chemical Industry Co., Ltd .: Hitech E-11000) 10 parts Methyl ethyl ketone 90 parts (Comparative Example 3) For forming transparent protective layer A in Example 1 An ID card was prepared in the same manner as in Example 1 except that the composition of the coating liquid was changed as follows. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating liquid for forming transparent protective layer A> Polypropylene (manufactured by Tokuyama Soda Co., Ltd .: MH-170) 5 parts Polyvinyl butyral resin (manufactured by Sekisui Chemical Co., Ltd .: S-REC KS-1) 5 parts Methyl ethyl ketone 90 parts (Comparative Example 4) An ID card was prepared in the same manner as in Example 1 except that the composition of the coating solution for forming the transparent protective layer A in Example 1 was changed as follows. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Poly (acrylonitrile-butadiene) resin (manufactured by Goodyear Corp .: Hiker 1002) 10 parts Methyl ethyl ketone 70 parts Toluene 20 parts (Comparative Example 5) The composition of the coating liquid for forming the transparent protective layer A in Example 1 is as follows. An ID card was prepared in the same manner as in Example 1 except that the ID card was replaced. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating Liquid for Forming Transparent Protective Layer A> Phenolic resin (poly (octylphenol-formalin)) (manufactured by Gunei Chemical Co., Ltd .: PP-5120, melting point 80-100 ° C.) 10 parts Methyl ethyl ketone 70 parts n-butyl acetate 20 parts (Comparative Example 6) An ID card was prepared in the same manner as in Comparative Example 3 except that the composition of the second image-receiving layer forming coating solution in Comparative Example 3 was changed as follows. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Coating liquid for forming second image-receiving layer> Phenolic resin (poly (octylphenol-formalin)) (manufactured by Gunei Chemical Co., Ltd .: PP-5120, melting point 80-100 ° C) 10 parts Methyl ethyl ketone 80 parts Toluene 10 parts ( Comparative Example 7) I was prepared in the same manner as in Comparative Example 6 except that the same ultraviolet curable protective layer as in Example 1 was formed directly on the surface of the image receiving layer without forming the transparent protective layer in Comparative Example 6.
I made a D card. The obtained ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

(Comparative Example 8) The composition of the coating liquid for forming an ultraviolet-curing protective layer in Comparative Example 7 was the same as in Example 4 except for ID.
I made a card. Example 1 for the obtained ID card
The same evaluation as above was performed, and the results are shown in Table 1.

[0219]

[Table 1]

A: Polyvinyl butyral (Sekisui Chemical Co., Ltd.
Co., Ltd., S-REC BX-1) B: Ethyl cellulose (Hercules, N type) C: Polystyrene (Idemitsu Petrochemical Co., Ltd., Idemitsu Styrol GPUS-300) D: Polyvinyl acetoacetal (Sekisui Chemical Co., Ltd. )
Made, S-REC KS-1) E: Polyester (Toyobo Co., Ltd., Byron-300) F: Poly (acrylonitrile-butadiene) (Goodyear Co., Ltd., Hiker 1002) G: Saturated polyester (Toray Co., Ltd., K-1294) H: poly (octylphenol-formalin) (manufactured by Gunei Chemical Co., Ltd., PP-5120 melting point 80-100 ° C.) I: urethane-modified ethylene acrylic acid polymer emulsion (manufactured by Toho Chemical Industry Co., Ltd., S-) 6254) J: Polyethylene wax emulsion (Toho Chemical Industry)
Hitec E-11000 manufactured by K.K .: Polypropylene (MH-170 manufactured by Tokuyama Soda Co., Ltd.) L: Polyvinyl butyral (S-REC KS-1 manufactured by Sekisui Chemical Co., Ltd.) * (a), (b) The evaluation method of (c) conforms to the above-mentioned evaluation method of adhesiveness.

[0221]

According to the present invention, it is suitable for mass production, and by improving the adhesiveness of the hard ultraviolet protective layer formed on the surface, the ultraviolet curable protective layer can be peeled off even after long-term use. Thus, it is possible to provide an ID card which is excellent in durability, protects a transferred image for a long period of time, and can reliably store important personal information.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B32B 27/00 B 8413-4F B41M 5/40 G06K 19/06 19/10 G06K 19/00 S

Claims (4)

[Claims] 1. A support comprising, on one surface of a support, an image-receiving layer for receiving a dye to form a transferred image and an ultraviolet-curing protective layer in this order, and adhering to the ultraviolet-curing protective layer in the image-receiving layer. The critical surface tension of the layer is 34 to 50 at room temperature.
An ID card characterized by dyne / cm. 2. A support comprising an image-receiving layer for receiving a dye to form a transferred image, a transparent protective layer, and an ultraviolet-curable protective layer in this order on one surface of the support, and the ultraviolet ray in the transparent protective layer. ID characterized by having a critical surface tension of 34 to 50 dyne / cm at room temperature for the layer that adheres to the hardening protective layer
card. 3. The ID card according to claim 2, wherein the layer of the transparent protective layer that is adhered to the ultraviolet curable protective layer contains polyvinyl acetal. 4. The ID card according to claim 1, wherein the UV-curable protective layer is made of a UV-curable resin containing an epoxy group.