JPH0624183A - Ic card - Google Patents

Abstract

PURPOSE:To provide an ID card which is fit for mass production and has superior durability and effectively prevents forgeries. CONSTITUTION:On one surface of a supporting body of this ID card, there are provided an intermediate layer upon necessities, an image receiving layer for accepting thermally diffusible coloring matters and forming images, a transparent protecting layer upon necessities, and an ultraviolet curing protecting layer for protecting the image receiving layer having transfer images formed, in this order. Moreover, a writing layer is provided upon necessities on the other surface of the supporting body. The adhering force between the supporting body and the intermediate layer or image receiving layer is relatively smaller than the other interlayer adhering force of the layers.

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 and is excellent in durability, and even if an attempt is made to modify by peeling the interface between the image-receiving layer on which the transfer image is formed and the transparent protective layer provided on the surface of the transfer image, The present invention relates to an ID card capable of effectively preventing alteration by causing peeling at least at a part of an interface between other layers.

[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 popular. These ID cards, such as automobile licenses, have a face photograph formed on the surface of the support by a silver salt photography method and necessary information described by a printing method, and a protective layer is formed on the surface. Was there. Since formation of a facial photograph by this silver salt photography method has complicated multi-step processes such as exposure, development, fixing and bleaching,
It is not always appropriate in the field where a large number of ID cards must be produced quickly.

Under these circumstances, recently, a transfer image such as an image containing gradation information by a sublimation type thermal transfer recording system or a character information containing image by a thermal fusion type thermal transfer recording system is formed on the surface of a support. An image-receiving layer having a layer formed thereon is further applied, and an ultraviolet-curing resin is applied to the entire surface of the transferred image in the image-receiving layer, and an ultraviolet-curing protective layer is formed by irradiating this with an ultraviolet-curing resin. A convenient ID card has been proposed.

By the way, in today's so-called card society, the number of ID cards possessed by an individual has become incomparably larger than before. In such a situation, if the ID card is lost, etc.
It is absolutely necessary to prevent the D card from being altered and misused. The ID card has an important function as a so-called ID card, and protecting it from misuse by alteration not only protects the individual who is the holder of the ID card, but also maintains social order. become.

However, in the conventional ID card, the adhesive force between the image-receiving layer on which an image is formed and the transparent protective layer for protecting the image is relatively compared with the adhesive force between other layers. Since there was almost no difference, it was relatively easy to selectively peel off the interface between the image receiving layer and the protective layer, and it was not effective in preventing alteration. Under such circumstances, social demands for preventing alteration of ID cards are increasing.

An object of the present invention is to provide an ID card which meets the above-mentioned demands, solves the above problems, is suitable for mass production, has excellent durability, and can effectively prevent alteration. is there.

[0007]

As a result of intensive investigations by the present inventors in order to achieve the above object, at least one of the adhesive forces between the layers of the ID card formed a transfer image on the image receiving layer. If it is relatively smaller than the adhesive force at the interface between the surface and the transparent protective layer formed on the surface, even if the interface of the surface on which the transfer image is formed on the image receiving layer is selectively peeled off and the modification is attempted, The present invention has been found out that it is possible to effectively prevent deformation because peeling occurs in at least a part of the interface between other layers having a smaller adhesive force.

That is, in the invention described in claim 1, an image receiving layer for receiving a dye to form a transferred image on one surface of a support, and an ultraviolet curing for protecting the transferred image formed on the image receiving layer. 3. An ID card comprising a protective layer in this order, wherein the adhesive force between the support and the image receiving layer is smaller than the adhesive force between other layers, and the invention according to claim 2 is On one surface of the support, an intermediate layer, an image receiving layer that receives a dye to form a transferred image, and an ultraviolet curing protective layer that protects the transferred image formed on the image receiving layer are provided in this order. 5. The ID card according to claim 3, wherein the adhesive force between the support and the intermediate layer or the adhesive force between the intermediate layer and the image receiving layer is smaller than the adhesive force between the other layers. Is formed on the image receiving layer between the image receiving layer and the ultraviolet curing protective layer. The ID card according to claim 1 or 2, further comprising a transparent protective layer for protecting an image. The invention according to claim 4, wherein the writing layer is provided on the other surface of the support. The ID card according to any one of claims 1 to 3.

The present invention will be described in detail below. The ID card according to the present invention has a support, an image receiving layer and an ultraviolet curing protective layer as essential layers, and further, if necessary, an intermediate layer,
A transparent protective layer or a writing layer is provided. In the case where an interface between the surface of the image receiving layer on which a transferred image is not formed and the support, and further an intermediate layer is provided between the image receiving layer and the support, the interface between the image receiving layer and the intermediate layer or the intermediate layer and the support It is characterized in that the adhesive force at the interface with the body is adjusted to be smaller than the adhesive force between other layers.

<< Structure of ID Card >> (1) Support The support for the ID card in the present invention is not particularly limited as long as it has the required mechanical strength as an ID card. Various papers known per se such as paper and synthetic paper, various plastic films or sheets such as white vinyl chloride resin sheet or polyethylene terephthalate base film, films or sheets formed of various metals or various ceramics The formed film or sheet may be mentioned. Further, the support of the ID card may be a single sheet made of the various materials described above, or a composite laminated sheet in which sheets made of the various materials are combined.

Among these, a composite laminated sheet having a white polyethylene terephthalate base film and a polyethylene terephthalate sheet is preferable. A white pigment such as titanium white or magnesium carbonate is preferably added to the support in order to enhance the clarity of the transferred image formed on the image receiving layer.

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, a white polyethylene terephthalate base film or a polyethylene terephthalate sheet is used. The composite laminated sheet having is common.

The thickness of the support is usually 100 to
The thickness is 1,000 μm, preferably 100 to 800 μm, and more preferably 200 to 800 μm. If necessary, the support may be provided with an emboss, a signature, an IC memory, an optical memory, a magnetic recording layer, other printing or the like.

(2) Image Receiving Layer The image receiving layer in the ID card of the present invention is basically formed by a binder for the image receiving layer. This image-receiving layer preferably contains a release agent, and may contain a metal ion-containing compound described later and, if necessary, various additives.

The image-receiving layer has an adhesive force between the support and the image-receiving layer, or, when an intermediate layer described later is provided, between the intermediate layer and the image-receiving layer or between the intermediate layer and the support. It is formed by appropriately adjusting the types and contents of various components forming the image-receiving layer so that the adhesive force between the image cards is relatively smaller than the adhesive force between any other layers in the ID card. .

The thickness of the image receiving layer formed on the surface of the support or an intermediate layer described later is usually 0.5 to 20 μm, preferably 1 to 10 μm.
μm.

<Binder for image-receiving layer> The binder for the image-receiving layer is not particularly limited, and various known resins can be used.

Examples of the binder for the image-receiving layer include polyvinyl chloride resins, copolymer resins of vinyl chloride and other monomers (eg, isobutyl vinyl ether, vinyl propionate, etc.), polyester resins, poly (meth) acryl. Acid ester, polyvinylpyrrolidone,
Polyvinyl acetal resin, polyvinyl alcohol,
Polycarbonate, cellulose triacetate, polystyrene,
Copolymer of styrene and other monomers (for example, acrylic acid ester, acrylonitrile, ethylene chloride, etc.), vinyl toluene acrylate resin, polyurethane resin, polyamide resin, urea resin, epoxy resin, phenoxy resin, polycaprolactone resin, poly Examples thereof include acrylonitrile resin and modified products thereof.

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. One of these resins may be used alone, or two or more thereof may be used in combination. The above various resins 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), radiation,
It can be formed by crosslinking or curing with heat, moisture, a catalyst or the like. In such cases, epoxy,
Radioactive monomers such as acrylics and crosslinking agents such as isocyanates can be used.

<Release Agent> It is preferable to add a release agent to the image-receiving layer in order to facilitate separation of the image-forming ink sheet described below from the image-receiving layer. In addition, the adhesive force between the image receiving layer and the support or the adhesive force between the image receiving layer and the intermediate layer can be adjusted by appropriately selecting the type and content of the release agent.

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 interfaces. Examples thereof include activators, 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 described above includes a type that is simply added (simple addition type) and a type that is cured or reacted (curing reaction type). In case of simple addition type,
In order to improve the compatibility with the binder, modified silicone oil (for example, polyester modified silicone resin,
It is preferable to use 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 generally the binder for the image receiving layer. To 0.1 to 30% by weight, preferably 0.5 to 20% by weight.

As the curing reaction type silicone oil,
Examples thereof include reaction-curable type (resin cured with amino-modified silicone oil and epoxy-modified silicone oil), photocurable type, and catalyst-curable type. The amount of these curable silicone oils added is 0.
5 to 30% by weight is preferable. The amount of the releasing agent other than the 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 can be mentioned. Among these, A
l, Co, Cr, Cu, Fe, Mg, Mn, Mo, N
i, Sn, Ti and Zn are preferable, and N is more preferable.
i, Cu, Co, Cr and Zn.

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⁺ , C
The following general formula (Chemical formula 1) containing o ²⁺ , Cr ²⁺ and Zn ²⁺
The complex represented by can be preferably used.

[0028]

[Chemical 1]

However, in the formula, M represents a metal ion, and Q
₁ , Q ₂ and Q ₃ each represent a coordination compound capable of forming a coordination bond with a metal ion represented by M. Examples of these coordination compounds are described in “Chelate Chemistry (5) (Nankodo)”. Can be selected from the coordination compounds. 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 preferably tetraphenylboron anion and its derivatives,
And alkylbenzene sulfonate anions and their 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 determined depending on whether the complex represented by the general formula is tetradentate or hexadentate, or Q ₁ , Q ₂ , Q ₃ determined by the number of 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 US Pat. No. 4,987,049. The addition amount of the metal ion-containing compound, relative to the image receiving layer is preferably ^{0.5~20g / m 2, 1~10g / m} 2 is more preferable.

<Additives> 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. When these additives affect the adhesive strength between the image receiving layer and the support or the adhesive strength between the image receiving layer and the intermediate layer, it is desirable to appropriately select the type of additive and its addition amount. .

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

Examples of the UV absorbers and light stabilizers are JP-A-59-158287, JP-A-63-74686, JP-A-63-145089, JP-A-59-19692, and JP-A-62-19462.
No. 229594, No. 63-122596, No. 61-
The compounds described in JP-A No. 283595, JP-A-1-204788 and the like, and compounds known to improve 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. As the inorganic fine particles, silica gel,
Calcium carbonate, titanium oxide, acid clay, activated clay, alumina and the like can be mentioned, and as the organic fine particles, fluororesin particles, guanamine resin particles, acrylic resin particles,
Resin particles such as silicon resin particles can be mentioned.
These inorganic / organic resin particles differ depending on the specific gravity,
Addition of 0.1 to 70% by weight is preferred.

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, citric acid esters, epoxidized soybean oil, epoxidized linseed oil, and epoxystearic acid. Epoxies,
Orthophosphoric acid esters, phosphorous acid esters, glycol esters and the like can be mentioned.

Examples of the heat-meltable substance include alcohols such as phenol, amides such as acetamide, esters such as benzyl cinnamate, ethers such as crown ether, ketones such as p-methylacetophenone, and dimethoxybenzaldehyde. Aldehydes such as stilbene, hydrocarbons such as stilbene, higher fatty acids such as margaric acid, higher alcohols such as eicosanol, higher fatty acid esters such as cetyl palmitate, higher fatty acid amides such as stearic acid amide, and higher amines such as behenylamine. Represented by the following, waxes such as paraffin wax, rosin derivatives such as rosin phenol resin, phenol resin, ketone resin, epoxy resin, diallyl phthalate resin, terpene resin, aliphatic hydrocarbon resin, cyclopentadiene resin, It can be mentioned Li olefin resins, polyethylene glycol, high molecular compounds typified polyolefin oxides such as polypropylene glycol and the like.

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 forming the image-receiving layer, and applying the coating solution for forming 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 adopting the laminating method, a 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 that have

--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 A character information-containing image representing characters, figures, symbols, etc. in which unique information is written is formed, and these can be formed using a thermal transfer recording ink sheet.

The thermal transfer recording ink sheet can basically be formed by laminating an ink layer on a support. The ink sheet for heat-sensitive transfer recording has a fusible ink layer used in the heat-melting type heat-sensitive transfer recording method (heat-melting type heat-sensitive transfer recording ink sheet), or the one used in the heat sublimation-type heat-sensitive transfer recording method, Examples include those having an ink layer containing a heat sublimation dye (heat sublimation type thermal transfer recording ink sheet). Of these, usually
The gradation information-containing image or the like is formed by a thermal sublimation type thermal transfer recording ink sheet, and the character information-containing image is formed by a thermal sublimation type thermal transfer recording ink sheet or a thermal melting type thermal transfer recording ink sheet. As these thermal transfer recording ink sheets, those known per se can be used.

The gradation information-containing image is image-wise heated at the interface between the ink layer and the image receiving layer by, for example, superposing the ink layer of the thermal sublimation type thermal transfer recording ink sheet and the image receiving layer on the ID card. It can be formed by applying energy. Then, the heat sublimable dye in the ink layer is vaporized or sublimated by an amount according to the heat energy applied at the time of image formation, and as a result is transferred to the image receiving layer side and received,
A dye image (gradation (color) image such as a color facial photograph image) is formed on the image receiving layer.

By the above thermal transfer recording, one color image can be recorded on the image receiving layer of the ID card.
According to the following method, it is also possible to obtain a color image having a color photographic tone, which is a combination of colors.

For example, yellow, magenta, cyan, and, if necessary, black heat-sensitive transfer recording heat-sensitive sheets are sequentially replaced, and heat transfer is performed according to each color to obtain a color photographic tone color image formed by combining each color. You can also According to the above, an image having gradation can be transferred and formed on the image receiving layer, for example, a person image.

(3) 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. As the intermediate layer, the adhesive force between the intermediate layer and the support or the adhesive force between the intermediate layer and the image receiving layer may be relatively smaller than the adhesive force between other layers. If the ID card can be maintained and the form of the ID card can be maintained, there is no particular limitation, and the ID card can be formed by selecting various materials and methods according to the material between the layers of the ID card.

As the adhesive force of the intermediate layer, the adhesive force between the intermediate layer and the support and the adhesive force between the intermediate layer and the image receiving layer are relatively smaller than the adhesive force between the other layers. is necessary. In this case, the adhesive force between the intermediate layer and the support and the adhesive force between the intermediate layer and the support may be the same adhesive force, or the adhesive forces may be different from each other, 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.

In order to reduce the adhesive force at the interface of the intermediate layer, for example, a similar polymer which is easily fused by heat should not be used, or a compound having a polar group so as to form an ionic bond should not be used. It can be achieved by adjusting conditions such as pressure, temperature, time and the like when forming the resin, adding a release agent such as a silicone compound for adjusting the adhesiveness, and the like.

This 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-melting substance and / or a thermoplastic substance onto the surface of the support. You can Examples of the low softening point resin used for the intermediate layer include ethylene-vinyl acetate, ethylene-based copolymers such as ethylene-ethyl acrylate, nylon, polyamide-based resins such as dimer acid,
Polystyrene resin such as styrene-butadiene, styrene-isoprene, styrene-ethylene-butylene, polyester resin, polyolefin resin, polyvinyl ether resin, polymethylmethacrylate resin, ionomer resin, cellulose resin, polyurethane resin, acrylic Examples of the resin include a resin, an epoxy resin, a melamine resin, and a vinyl chloride resin.

Examples of the tackifier include rosin tackifiers, water-added rosin tackifiers, rosin maleic acid tackifiers, polymerized rosin tackifiers and rosin phenol tackifiers. Examples thereof include modified or modified rosin-based tackifiers, petroleum resin-based tackifiers and modified tackifiers thereof, and terpene-based tackifiers.

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. The releasing property imparting substance for adjusting the adhesiveness which can be contained in the intermediate layer is the same as the releasing agent which 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.
~ 5 μm.

(4) Transparent Protective Layer In the ID card of the present invention, when an ultraviolet curing protective layer, which will be described later, is formed on the image receiving layer having the image information formed by the thermal transfer recording system, the image information may be added as necessary. A transparent protective layer can be provided for the purpose of protecting the. The reason is that the action of the UV-curable prepolymer or monomer present in the UV-curable protective layer, which will be described later, causes troubles such as bleeding or discoloration of the transferred image, and a clear image cannot be obtained. Because there is.

Further, when forming the UV-curable protective layer, the thermal sublimation dye is deteriorated by UV irradiation (presumed to be the deterioration caused by decomposition or reaction with other substances).
It is necessary to provide a transparent protective layer in order to effectively prevent discoloration and discoloration. As the transparent protective layer, the adhesive force between the ultraviolet curable protective layer or the image receiving layer and the transparent protective layer is relatively larger than the adhesive force at the interface on the surface of the image receiving layer where the transfer screen is not formed. That it is substantially transparent, that it is possible to minimize the interference of ultraviolet light with the sublimable dye upon irradiation with ultraviolet light, and to prevent the coating agent from contacting the sublimable dye when applying the coating agent. What you can do is required.

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. As the transparent protective layer satisfying the above requirements, for example,
Japanese Patent Application Laid-Open No. 63-183881, page 9, lower left column, line 9 to page 10, upper left column, line 15 and the heat-fusible compound described on page 10, upper left column, line 16 to page 11 In the lower left column, line 9, there can be mentioned a layer formed with the exemplified thermoplastic resin.

An ultraviolet absorber may be contained in the transparent protective layer. The ultraviolet absorber is effective for 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. This UV absorber may be difficult to put in the UV curable resin layer (it inhibits the curing of the UV curable resin).
It is effective to add it to the transparent protective layer. 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 its type, but is 0.6 g / m ² or more, more preferably 1
It is preferably g / m ² or more. As the thickness of the transparent protective layer,
Considering the uniform coating property of the UV-curable protective layer, it is usually 0.
5 to 20.0 μm, preferably 1.0 to 10.0
μm.

(5) UV-Curing Protective Layer In the ID card of the present invention, a UV-curing protective layer can be formed if necessary. A substantially transparent UV-curable protective layer that is cured by UV irradiation, on the surface of the transparent protective layer when formed, when the image-receiving layer is not formed, on the surface of the image-receiving layer on which the transfer image is formed. Form directly. As the ultraviolet-curable protective layer in this invention, the adhesive force between the image-receiving layer or the transparent protective layer and the ultraviolet-curable protective layer is the adhesive force between the image-receiving layer and the support, and when an intermediate layer is provided. It may be relatively large as compared with the adhesive force between the image receiving layer and the intermediate layer or the adhesive force between the intermediate layer and the support. For example, it can be formed by adopting various methods using the coating agent for the UV-curable protective layer described below.

As a method for increasing the adhesive strength at the interface of the UV-curable protective layer, for example, a similar polymer which is easily heat-sealed is used, a compound having a polar group so as to form an ionic bond is used, It can be achieved by adjusting conditions such as pressure, temperature and time when forming a layer, and by providing a structure that reacts with a functional group of a binder resin of an image receiving layer to form a covalent bond upon irradiation with ultraviolet rays. .

The ultraviolet-curing protective layer may contain, for example, the following fine particles. When containing fine particles,
Compared with the case where no fine particles are contained, it is more effective against forgery and alteration, and can be easily distinguished from other cards, which is preferable. The material of the fine particles is not particularly limited, but usually inorganic fine particles and organic fine particles can be used. As inorganic fine particles, titanium white,
Magnesium carbonate, zinc oxide, barium sulfate, silica,
Examples thereof include powders such as 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 coloring agent. Examples of this 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, infrared absorbers and the like 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. Asperity with a specific pattern on the surface of the UV protection layer,
For example, it is preferable to form a mark of some kind, 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 gravure pattern of a specific pattern, or embossing when the UV-curable resin is semi-cured The unevenness can be formed by a method or the like. The coating agent for forming the ultraviolet curing protective layer can be formed by a composition containing an ultraviolet curable prepolymer and / or a monomer and a polymerization initiator as main components.

As the UV-curable prepolymer and monomer, there are a type in which polymerization is caused by radical polymerization (mainly an acrylate type) and a type in which polymerization is caused by cationic polymerization (mainly an epoxy type),
Either may be used for the purpose of this invention.
Here, epoxy type UV curable prepolymer,
The monomers are listed. Examples of 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 aromatic polyols. Examples thereof include ethers, 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 is preferably 70% by weight or more in the coating agent for forming a UV-curable protective layer.
The polymerization initiator is preferably a cationic polymerization initiator, and specific examples thereof include an aromatic onium salt.

As this aromatic onium salt, V.
A salt of a group a element, for example, a phosphonium salt (for example, triphenylphenacylphosphonium hexafluorophosphate), a salt of a Group VIa element, for example, a sulfonium salt (for example, triphenylsulfonium tetrafluoroborate, hexafluoroline) Acid triphenylsulfonium, hexafluorophosphate tris (4-thiomethoxyphenyl), sulfonium and hexisafluoroantimonate triphenylsulfonium), and salts of Group VIIa elements, such as iodonium salts (eg, diphenyliodonium chloride) ) Can be mentioned.

The use of such an aromatic onium salt as a cationic polymerization initiator in the polymerization of an epoxy compound is described in US Pat. Nos. 4,058,401 and 4,058.
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. In the coating agent for the UV-curable protective layer, a surfactant such as oils (particularly silicone oil), a silicone-alkylene oxide copolymer (for example, L-5410 commercially available from Union Carbide Co.), Silicone Oil-Containing Aliphatic Epoxides Fluorocarbon surfactants such as FO-171 commercially available from 3M Company, FO-430 commercially available from 3M Company, and Megafac F-141 commercially available from Dainippon Ink Co., Ltd. You may also contain an agent.

In the coating agent for the UV-curable protective layer, vinyl monomers such as styrene, paramethylstyrene, methacrylic acid ester, acrylic acid ester and the like, cellulosics, thermoplastic polyesters, phenylglycidyl ethers, silicon-containing monolayers are further included. Epoxides, monoepoxides such as butyl glycidyl ether, etc. 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.

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

(6) Writing Layer The writing layer is a layer which allows writing on the back surface of the ID card. As such a writing layer, for example, a "writing layer" described in JP-A-1-205155 can be formed. 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 sublimable dye to the image receiving layer by heating imagewise with a heat source such as a thermal head. Next, various character information-containing images are formed on the surface of the image receiving layer on which the gradation information-containing image is not formed, using the heat-melting type thermal transfer recording ink sheet. A transparent protective layer is formed on the surface of the image receiving layer on which the transferred image is formed by a coating method, a hot stamp method using a transparent sheet, or other method. After that, the entire image receiving layer is coated with an ultraviolet curable resin,
An ultraviolet curing protective layer is formed by irradiating with ultraviolet rays.

The sublimation-type thermal transfer recording ink sheet is not particularly limited, and conventionally known ones can be used. The ID card thus obtained is convenient for mass production and has excellent durability because it has a hard transparent UV-curing protective layer on its surface.
Even if an attempt is made to modify by peeling the interface between the surface of the image receiving layer of the D card on which the transfer image is formed and the hard protective layer formed on the surface, the adhesive strength is always smaller when peeling. Delamination occurs at another interface, and the interface between the image-formed surface of the image-receiving layer and the hard protective layer formed on the surface does not easily delaminate, so that alteration can be effectively prevented.

[0075]

EXAMPLES Examples of the present invention will be specifically described below. In the following, "part" means "part by weight". (Example 1) -Preparation of support-On both sides of a polyethylene terephthalate resin sheet (manufactured by ICI: Melinex 226) having a thickness of 350 μm,
A low-density polyethylene resin (Mitsui Petrochemical Co., Ltd .: Mirason 16P) having a thickness of 50 μm was mixed with 15% of titanium oxide, and the composition was extruded by an extrusion coating method to give a wide composite having a thickness of 450 μm. A resin sheet was obtained. 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 was applied on 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. . <Intermediate layer forming coating solution> Polyvinyl butyral (S-REC BL-1: Sekisui Chemical Co., Ltd.) ... 9 parts Hexamethylene diisocyanate (Coronate HX: Nippon Polyurethane Co., Ltd.) ...・ ・ ・ ・ 1 part Methyl ethyl ketone ・ ・ ・ ・ 80 parts Cyclohexanone ・ ・ ・ ・ 10 Department.

-Formation of Image Receiving Layer- The first composition having the following composition on the surface of the formed intermediate layer.
An image receiving layer A was formed by laminating the image receiving layer forming coating solution and the second image receiving layer forming coating solution 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 (S-REC BX-1, manufactured by Sekisui Chemical Co., Ltd.) ... 6 parts Metal ion-containing compound (represented by the following (Chemical Formula 2) Compound MS-1) ... 4 parts Methyl ethyl ketone ... 80 parts Cyclohexanone ...・ ・ ・ ・ ・ ・ ・ ・ 10 copies.

<Coating Liquid for Forming Second Image Receiving Layer> Polyethylene wax emulsion (35%) (manufactured by Toho Chemical Co., Ltd .: Hitech E-1000) ... 14 parts Urethane-modified ethylene acrylic acid polymer emulsion (25 %) (Manufactured by Toho Chemical Co., Ltd .: Hi-Tech S-3125) ・ ・ ・ 20 parts Water ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ 66 copies.

[0079]

[Chemical 2]

-Formation of Writing Layer- A coating layer-forming coating liquid 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.

[0081]

[Chemical 3]

-Formation of transparent protective layer- A transparent polyethylene terephthalate film having a thickness of 25 μm was coated with a coating solution for forming a transparent protective layer X having the following composition to a thickness of 1 μm by a wire bar coating method.
m and then dried, and then a transparent protective layer adhesive coating solution having the following composition is applied by a wire bar coating method to a thickness of 2 μm and dried to form a transparent protective layer X. did.

<Coating liquid for forming transparent protective layer X> Polyvinyl acetal (manufactured by Sekisui Chemical Co., Ltd .: KS-1) 4 parts ethyl cellulose (manufactured by Kanto Chemical Co., Ltd .: 4 parts Acid-modified acrylic / polystyrene graft polymer (Toagosei Chemical Industry Co., Ltd .: Reseda GP-400) 2 parts Isocyanate (Nippon Polyurethane Co., Ltd.) ): Coronate HX) 1 part UV absorber (2,4-dihydroxybenzophenone) 3 parts Methyl ethyl ketone・ 86 copies.

<Coating Liquid for Adhesion of Transparent Protective Layer> Maleic anhydride-modified ethylene vinyl acetate copolymer (manufactured by Mitsui DuPont Polychemical Co., Ltd .: VR-103): 5 parts Acrylic resin (manufactured by Mitsubishi Rayon Co., Ltd.) : Dynar BR-87) ・ ・ 2.5 parts Polystyrene / acrylic graft polymer (Toa Gosei Chemical Industry Co., Ltd .: Reseda GP-200) ・ ・ 2.5 parts Toluene ・ ・ ・........ 90 copies.

-Formation of UV-Curing Protective Layer- A specific background pattern is formed on the surface of the transparent protective layer so that the coating liquid for forming a UV-curing protective layer having the following composition has a coating amount of 10 g / m ^2. It was applied by gravure, the coating liquid for forming an ultraviolet-curing protective layer was applied under the following curing conditions, and the ultraviolet-curing protective layer was formed under the following curing conditions.

<UV Curing Layer Forming Coating Liquid> Bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate (UCL: ERL4299) ... 70.0 parts Bisphenol A glycidyl ether. --- 10.0 parts 1,4-butanediol glycidyl ether --- 13.0 parts Triarylsulfonium fluoroantimony --- 7.0 parts.

-Formation of Transfer Image- The ID card laminate, in which the intermediate layer, the image receiving layer and the writing layer are provided on the support, is cut into a card size according to JIS standard, and the obtained ID card laminate is obtained. An image receiving layer and an ink layer containing a heat sublimation dye in a heat sublimation type heat transfer ink sheet are superposed, and an output of 0.23 W / dot is obtained from the side of the heat sublimation type heat transfer recording ink sheet using a thermal head. Pulse width 0.3-4.5 mse
By heating under the conditions of c and a dot density of 16 dots / mm, a human face image with gradation was formed on the image receiving layer.

Then, a 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, and slightly larger than the human face image. The transparent protective layer is 1 using a heat roller.
It was easily transferred to the image-receiving layer by peeling off the support after applying heat at 80 ° C. for 1.2 seconds.

Next, on the surface of the transparent protective layer and the surface other than the transparent protective layer, 10 g of a coating liquid for forming an ultraviolet-curing protective layer was applied.
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. Curing conditions: Light irradiation source: 60 W / cm ² high-pressure mercury lamp Irradiation distance: 10 cm Irradiation mode: Optical scanning at 3 cm / min ID card obtained in this way The adhesive force between the respective layers in was evaluated by the criteria described below, and the results are shown in Table 1.

(Example 2) Except that the intermediate layer was not provided,
An ID card was prepared in the same manner as in Example 1. This ID
The card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

(Example 3) An ID card was prepared in the same manner as in Example 1 except that the image receiving layer A was replaced with the following image receiving layer B and no transparent protective layer was provided. This ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

—Formation of Image Receiving Layer B— An image receiving layer B was formed by laminating a coating solution for forming an image receiving layer B having the following composition on the surface of the intermediate layer so as to have a thickness of 5 μm. <Coating Liquid for Forming Image Receiving Layer B> Polyvinyl chloride resin (manufactured by Shin-Etsu Chemical Co., Ltd .: TK-300) 5 parts Metal ion-containing compound (shown in the above (formula 2) Compound MS-1): 3 parts Methyl ethyl ketone: 80 parts Cyclohexanone ::・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 10 copies.

Example 4 An ID card was prepared in the same manner as in Example 1 except that the image receiving layer A was replaced with the image receiving layer B and the intermediate layer and the transparent protective layer were not provided. This ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

(Example 5) 3 parts of the fluorescent dye EG-302 (manufactured by Mitsui Toatsu Dye Co., Ltd.) was contained in the coating liquid for forming the ultraviolet curing protective layer for forming the ultraviolet curing protective layer of Example 1. Except for the above, an ID card was prepared in the same manner as in Example 1. This ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Example 1 An ID card was prepared in the same manner as in Example 1 except that the transparent protective layer X forming coating solution was replaced with the transparent protective layer Y forming coating solution described below. This 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 Y> Maleic anhydride modified ethylene vinyl acetate copolymer (VR-103, manufactured by Mitsui DuPont Polychemical Co., Ltd.) ... 5 parts Polystyrene / acrylic graft polymer (Toa Gosei) Chemical Industry Co., Ltd .: Reseda GP-200) ... 5 parts Toluene ... 90 parts.

Comparative Example 2 An ID card was prepared in the same manner as in Example 1 except that the transparent protective layer X forming coating solution was changed to the transparent protective layer Z forming coating solution described below. This 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 Z> Maleic anhydride-modified ethylene vinyl acetate copolymer (VR-103, manufactured by Mitsui DuPont Polychemical Co., Ltd.) 2.5 parts Acrylic resin (Mitsubishi Rayon Co., Ltd. ): Dianal BR-87): 2.5 parts Polystyrene / acrylic graft polymer (Toa Gosei Chemical Co., Ltd .: Reseda GP-200): 5 parts: Toluene:・ ・ ・ ・ ・ 90 copies.

Comparative Example 3 An ID card was prepared in the same manner as in Example 1 except that the transparent protective layer was not used. This ID card was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

<Evaluation><Adhesiveness> The adhesiveness between the layers in the ID card was evaluated by conducting the following cross cut test. Feather Safety Razor Co., Ltd. Feather Razor S made by the specified method is used to cut at a angle of 30 ° with a feather razor S single-edged blade to make 100 squares (10 × 10) of 1.5 mm that reach the substrate. Occasionally, the number of grids of the coating film which remained without peeling off was measured. If the coating has good adhesiveness as a whole, after making a grid, stick cellophane tape on the surface, peel off the tape and measure the number of peeled away areas of the grid And evaluated.

[0101]

[Table 1]

[0102]

According to the present invention, the function of preventing alteration, which is not sufficient in the conventional ID card, is effectively achieved, that is, it is suitable for mass production and has excellent durability, and the image receiving layer in the ID card. Even if you try to modify by peeling off the interface of the surface on which the transfer image is formed, peeling always occurs at another interface with a relatively smaller adhesive force, and the surface of the image receiving layer on which the image is formed is Since it is not exposed, it is possible to provide an ID card that can prevent alteration without effectively tampering with the image information and can provide a technical effect.

Continuation of the front page (51) Int.Cl. ⁵ Identification number In-house reference number FI Technical indication location B41M 5/40 (72) Inventor Tomoki Kawamura 1 Sakura-cho, Hino-shi, Tokyo Konica Stock Company

Claims (4)

[Claims] 1. A support having, on one surface thereof, an image-receiving layer that receives a dye to form a transferred image and an ultraviolet-curing protective layer that protects the transferred image formed on the image-receiving layer in this order. The ID card is characterized in that the adhesive force between the support and the image receiving layer is smaller than the adhesive force between other layers. 2. An intermediate layer, an image-receiving layer that receives a dye to form a transferred image, and an ultraviolet-curable protective layer that protects the transferred image formed on the image-receiving layer, on one surface of a support. An ID card, which is provided in order and in which the adhesive force between the support and the intermediate layer or the adhesive force between the intermediate layer and the image receiving layer is smaller than the adhesive force between other layers. 3. The ID according to claim 1 or 2, further comprising a transparent protective layer provided between the image receiving layer and the ultraviolet curing protective layer for protecting a transferred image formed on the image receiving layer.
card. 4. The ID card according to claim 1, wherein a writing layer is provided on the other surface of the support.