JP4497402B2 - Magnetic card - Google Patents

Description

  The present invention relates to a magnetic card in which a card layer is provided with a magnetic layer for magnetically recording information in a machine-readable manner.

  The magnetic card has a card layer provided with a magnetic layer for magnetically recording a card user's unique ID number and the like so as to be machine-readable, and is widely used for cash cards and credit cards.

  In order to improve the security of magnetic cards, the magnetic layer has been concealed, and a concealing printing layer has been provided on the magnetic layer, or a hologram layer has been provided for design and anti-counterfeiting properties. It is known to make an excellent magnetic card. As a layer structure in such a magnetic card, for example, a magnetic layer, a thin film layer formed from a metal or a metal compound having a concealing property, a printed layer, and a hologram layer are sequentially provided on a card substrate. It is known that a magnetic card is used in which information is recorded on the magnetic layer from the surface of the volume hologram layer provided on the magnetic layer and information recorded on the magnetic layer is read (Patent Document 1). .

  Although a relief hologram is known as a hologram layer in such a magnetic card, it is possible to form a relief hologram with a thin film, but it is an attempt to make a volume hologram layer with a poor three-dimensional effect and excellent design. It has been. The volume hologram layer is excellent in stereoscopic effect, and can be recorded on a hologram by a number of interference fringes parallel to the surface in the depth direction of the layer. Even if shaved, the brightness is reduced but the same image is given (redundancy).

However, the volume hologram layer is extremely soft, and even if a protective layer is provided on the surface of the volume hologram layer, there is a problem in wear resistance against sliding contact of the magnetic head when the magnetic card is subjected to mechanical reading. In addition, since the volume hologram layer is usually extremely difficult to form thinly, when it is stacked on the magnetic stripe, the spacing loss when reading magnetic information is large, and magnetic recording data can be written and read accurately. There is a problem that is difficult.
JP-A-10-198950

  The present invention provides a magnetic card having a volume hologram layer on the surface thereof, which has excellent wear resistance against sliding contact of the magnetic head, can accurately write and read magnetic recording data, and can prevent forgery. The issue is to provide an excellent magnetic card.

The first magnetic card of the present invention includes a card base, a magnetic layer for magnetically recording information provided in a part or all of the card base, and at least the magnetic layer. A laminated structure comprising a thin film layer formed of a metal or a metal compound provided so as to conceal the layer, and a printed layer provided in a part or all of the card substrate including the laminated structure region; And a volume hologram layer provided in a part or all of the card substrate including the printed layer region and the laminated structure region, and magnetic information is recorded / reproduced from the volume hologram layer side. In the card, the volume hologram layer is a cationic polymerizable compound, a radical polymerizable compound, a photo radical polymerization initiator system that is sensitive to light of a specific wavelength and polymerizes the radical polymerizable compound, and It consists of a photosensitive material consisting of a photo-cationic polymerization initiator system that is sensitive to light of a different wavelength and polymerizes a cationically polymerizable compound in response to light of another wavelength, and records volume holograms. The subsequent glass transition temperature is 50 ° C. or higher, the breaking strength is 0.01 kgf / mm ^{2 to 5} kgf / mm ² , the breaking elongation is 0.01% to 30%, and the pencil hardness is 3B to 3H. It is characterized by being.

The second magnetic card of the present invention is provided in a part or all of the area of the card base, and has a print layer having a predetermined color, and a color substantially the same as the color in the print layer provided in the print layer area. And a volume provided in a part or all of the card substrate including the laminated structure area, and a laminated structure comprising a magnetic layer for magnetically recording information in a machine-readable manner. In a magnetic card further comprising a hologram layer and recording / reproducing magnetic information from the volume hologram layer side, the volume hologram layer is exposed to a cationic polymerizable compound, a radical polymerizable compound, light of a specific wavelength, and radical polymerization is performed. Radical polymerization initiator system for polymerizing a photoactive compound, and photocatalyst that is low in sensitivity to light of the specific wavelength and polymerizes a cationic polymerizable compound by being exposed to light of another wavelength Are those made of a photosensitive material consisting of a polymerization initiator system, it is a volume hologram glass transition temperature after recording 50 ° C. or more, and a breaking strength ^{0.01kgf / mm 2 ~5kgf / mm 2} , also The breaking elongation is 0.01% to 30%, and the pencil hardness is 3B to 3H.

The third magnetic card of the present invention is a transparent card base material, a visible light transmission layer portion having infrared absorptivity provided on the card base material, and a region other than the visible light transmission layer portion. A magnetic layer for magnetically recording information provided on the substrate for magnetically readable information, and a magnetic layer concealing print provided in a region other than the visible light transmitting layer so as to cover the magnetic layer And a volume hologram layer provided in a part or all of the card substrate including the layered structure region, and recording / reproducing magnetic information from the volume hologram layer side. And the volume hologram layer is exposed to light of a cation polymerizable compound, radical polymerizable compound, light of a specific wavelength and radicals in a magnetic card that shakes visible light transmittance in the cross-sectional direction in the region of the visible light transmissive layer portion. Heavy Radical polymerization initiator system for polymerizing a reactive compound, and a cationic photopolymerization initiator system for polymerizing a cationically polymerizable compound that is lightly sensitive to light of the specific wavelength and is sensitive to light of another wavelength The glass transition temperature after recording a volume hologram is 50 ° C. or higher, the breaking strength is 0.01 kgf / mm ^{2 to 5} kgf / mm ² , and the elongation at break Is 0.01% to 30%, and the pencil hardness is 3B to 3H.

  The magnetic card of the present invention comprises a volume hologram layer made of a specific photosensitive material, and has excellent wear resistance against sliding contact of the magnetic head, and excellent writing and reading characteristics on the magnetic layer, It is a magnetic card with excellent anti-counterfeiting properties.

  The magnetic card has a rectangular shape with a long side of 85.60 mm, a short side of 53.98 mm, and a thickness of 0.76 mm, as defined by, for example, ISO (International Organization for Standardization) 7810. As shown by a dotted line in FIG. In addition, the magnetic layer 12 for magnetically recording cardholder information is formed in a stripe shape (tape shape) with its long side being the same size as the long side of the card. In the present invention, “transparent” means at least visible light transmissivity.

  An embodiment of the first magnetic card of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a first magnetic card of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG.

  As shown in FIGS. 1 and 2, the magnetic card 10 has a magnetic layer 12, a thin film layer 13, a printed layer 14, a volume hologram layer 15, and a transparent protective layer 21 laminated on an opaque card base 11. A printed layer 14A and a back side protective layer 16 are laminated on the back side of the card substrate.

  In FIG. 2, the magnetic layer 12 is illustrated as being laminated on the card base 11, but the magnetic layer is embedded in the card base during the hot-pressure lamination with the card base and is the same as the surface of the card base. A surface can be formed. Further, the thin film layer 13, the print layer 14, and the volume hologram layer 15 are illustrated as being provided on the entire surface of the card base material. However, the thin film layer 13 only needs to conceal at least the magnetic layer 12, and the print layer 14 may be provided in a partial region of the card substrate including the thin film layer, or may be a combination of a print layer and an information display layer such as characters. Further, the volume hologram layer 15 may be provided in a partial region of the card substrate including the print layer and the thin film layer. The transparent protective layer 21 is preferably provided in the entire area of the card substrate.

  The card base 11 is made of a resin such as polyvinyl chloride, vinyl chloride vinyl acetate copolymer, polyester such as PETG, polycarbonate, polyamide, polyimide, cellulose diacetate, cellulose triacetate, polystyrene resin, acrylic resin, polypropylene, and polyethylene. In addition, it is a single sheet or a composite sheet selected from metals such as aluminum and copper, paper, or resin or latex-impregnated paper.

  In FIG. 2, the card base material 11 is illustrated as a single layer structure, but the card base material may be a multilayer structure. For example, when the card base material is formed of polyvinyl chloride (PVC), a transparent PVC overcoat having a thickness of 100 μm is used. An example is a four-layer base material sheet obtained by hot pressing a laminate of a sheet / white PVC sheet having a thickness of 280 μm / white PVC sheet having a thickness of 280 μm / a transparent PVC oversheet having a thickness of 100 μm. The white PVC sheet makes the card substrate opaque and can prevent the magnetic layer from being visually recognized from the back surface. Moreover, a white PVC sheet | seat is what knead | mixed white inorganic substance in PVC, and has a function which shields infrared region light.

  Although the thickness of the base sheet varies depending on the material, it can be 0.1 mm to 2.0 mm. However, when the magnetic card conforms to the ISO standard, the thickness of the entire magnetic card is The thickness is set to be about 0.76 mm.

  A stripe-shaped (tape-shaped) magnetic layer 12 is provided on the surface side of the card substrate. The magnetic layer is a portion that magnetically records data such as an ID number unique to the user of the magnetic card so as to be machine-readable. For example, when the card base material has a multilayer structure, the magnetic layer is provided in advance on the surface of the oversheet, and is embedded in the oversheet by hot pressing when forming the base material sheet by multilayering and integrated with the base material sheet. It is good to laminate.

  The magnetic layer may be formed by sticking a magnetic tape to the card substrate. Since the magnetic information recorded on the magnetic layer is recorded / reproduced via the volume hologram layer, it is preferable to obtain a predetermined magnetic output even if the spacing loss is large. For example, Dainippon Ink Co., Ltd. high output tapes “Memory Dick T-1201”, “Memory Dick T-1220”, “Memory Dick T-1203”, and the like can be mentioned.

  Alternatively, it may be formed by applying and drying a magnetic paint on the card substrate. The magnetic ink is an ink formed by dispersing magnetic powder in a heat-resistant binder solution such as polyurethane resin. Examples of the magnetic powder include barium ferrite having a coercive force of 580 to 720 oersted (Oe), a squareness ratio of 0.85 or more, and a plate ratio of 1.5 or more.

  A thin film layer 13 for concealing the magnetic layer is provided in a part or all of the area of the card substrate 11 so as to cover the area of the magnetic layer 12. The thin film layer conceals the position where the magnetic layer is provided, and can increase security. The thin film layer is a layer made of a metal or a metal compound, for example, Al, Cr, Fe, Co, Ni, Cu, Ag, Au, Ge, Mg, Sb, Pb, Cd, Bi, Sn, Se, In, Ga. Alternatively, a metal such as Rb or a metal compound (metal oxide, metal nitride, etc.) may be used alone or in combination of two or more. Of these metals, Al, Cr, Ni, Ag, or Au is particularly preferable.

  Examples of the method for forming the thin film layer include vapor deposition, electrodeposition, and sputtering. Here, the vapor deposition is a method of adhering a metal or metal compound film to the adherend surface. The metal or metal compound is dissolved and evaporated by direct energization or the like in a vacuum and applied to the adherend surface placed therein. For example, there are aluminum vapor deposition and gold vapor deposition. Electrodeposition is a method of depositing a metal or metal compound on an electrode by electrolysis, and includes, for example, electroplating. Further, sputtering is a method in which glow discharge is caused in reduced argon gas, ionized gas atoms collide with the target, and the constituent atoms of the ejected target adhere to the surface of the adherend.

  The thickness of the thin film layer is a thickness that does not transmit visible light, and is about 200 to 1000 mm, preferably 500 mm. When such a thin film layer is provided, the region becomes opaque to visible light, and the magnetic layer disposed therebelow is concealed from the magnetic card surface side. In addition, it is good to provide heat resistant resin layers, such as a polyurethane resin, as an internal protective layer on the card | curd base material in which the magnetic layer is not laminated | stacked.

  A print layer 14 is provided in a part or almost the entire region of the card base including the thin film layer region. The print layer is a character, graphic or symbol, or a combination of these, or a colored layer. In FIG. 1, a bank name or a logo indicating the use of a magnetic card such as “CASH” is drawn. . If the print layer is formed mainly of characters or the like, the above-described thin film layer may be seen on the base. Note that a first print layer may be provided first so as to cover the thin film layer as a base, and a second print layer made of characters or the like may be provided thereon. The printing layer is formed by silk printing or the like and has a thickness of 1 to 2 μm.

  Next, the volume hologram layer 15 will be described. The volume hologram layer is provided in a part or all of the card substrate including the print layer region and the thin film layer region. The volume hologram layer records the volume hologram on the photosensitive material sufficiently thicker than the interval between the interference fringes with the interference light between the object light and the reference light, and the three-dimensional structure of the interference fringes is recorded as it is. The volume hologram layer is formed by directly recording the interference light between the object beam and the reference beam on the volume hologram forming material layer, or by replicating the volume hologram master by close exposure. Industrially, the latter method is used.

  The volume hologram layer in the present invention is a cationic polymerizable compound, a radical polymerizable compound, a photo radical polymerization initiator system that is sensitive to light of a specific wavelength and polymerizes the radical polymerizable compound, and for the light of the specific wavelength. It is a photosensitive material comprising a photocationic polymerization initiator system that is low in photosensitivity and that polymerizes a cationically polymerizable compound in response to light of another wavelength.

  This photosensitive material is coated on a support, and then irradiated with light such as laser light that is photosensitized by a radical photopolymerization initiator system, and then the light such as laser light that is exposed to a photocationic polymerization initiator system. Hologram recording is performed by irradiating light of another wavelength. After the radical polymerizable compound is polymerized by irradiation with light such as laser light (hereinafter referred to as first exposure), the cationic polymerizable compound is converted into a photocation in the composition by the subsequent overall exposure (hereinafter referred to as post exposure). Cationic polymerization is performed by Bronsted acid or Lewis acid generated by decomposing the polymerization initiator system.

  As the cationically polymerizable compound, those which are liquid at room temperature are used so that the polymerization of the radically polymerizable compound is carried out in a composition having a relatively low viscosity throughout. Examples of such cationically polymerizable compounds include diglycerol polyglycidyl ether, pentaerythritol polyglycidyl ether, 1,4-bis (2,3-epoxypropoxyperfluoroisopropyl) cyclohexane, sorbitol polyglycidyl ether, trimethylolpropane polyglycidyl ether. And resorcin diglycidyl ether, 1,6-hexanediol diglycidyl ether, polyethylene glycol diglycidyl ether, and phenyl glycidyl ether.

  The radically polymerizable compound preferably has at least one ethylenically unsaturated double bond in the molecule. Further, the average refractive index of the radical polymerizable compound is larger than that of the cationic polymerizable compound, preferably 0.02 or more, and if it is smaller, the refractive index modulation becomes insufficient, which is not preferable. Examples of the radical polymerizable compound include acrylamide, methacrylamide, styrene, 2-bromostyrene, phenyl acrylate, 2-phenoxyethyl acrylate, 2,3-naphthalenedicarboxylic acid (acryloxyethyl) monoester, methylphenoxyethyl acrylate, and nonyl. Examples thereof include phenoxyethyl acrylate and β-acryloxyethyl hydrogen phthalate.

  The radical photopolymerization initiator system may be any initiator system that generates active radicals by the first exposure for producing a hologram, and the active radicals polymerize radical polymerizable compounds, and generally absorbs light. These sensitizers and active radical generating compounds or acid generating compounds may be used in combination. As the sensitizer in the radical photopolymerization initiator system, a colored compound such as a dye is often used to absorb visible laser light, but a cyanine dye is preferable when a colorless transparent hologram is used. Since cyanine dyes are generally easily decomposed by light, the dyes in the hologram are decomposed and absorbed in the visible range by being left exposed for several hours to several days under post-exposure or indoor light or sunlight in the present invention. A colorless and transparent hologram is obtained. Specific examples of the cyanine dye include anhydro-3,3′-dicarboxymethyl-9-ethyl-2,2′thiacarbocyanine betaine, anhydro-3-carboxymethyl-3 ′, 9-diethyl-2,2 'Thiacarbocyanine betaine, 3,3', 9-triethyl-2,2'-thiacarbocyanine iodine salt, 3,9-diethyl-3'-carboxymethyl-2,2'-thiacarbocyanine iodine salt Etc. are exemplified.

  Examples of the active radical generating compound that may be used in combination with a cyanine dye include diaryliodonium compounds and 2,4,6-substituted-1,3,5-triazines. When high photosensitivity is required, the use of diaryliodonium compounds is particularly preferred. Examples of the diaryliodonium include diphenyliodonium, 4,4′-dichlorodiphenyliodonium, 4,4′-dimethoxydiphenyliodonium, and the like. Examples of 2,4,6-substituted-1,3,5-triazines include 2-methyl-4,6-bis (trichloromethyl) -1,3,5-triazine, 2,4,6-tris. (Trichloromethyl) -1,3,5-triazine and the like are exemplified.

  The cationic photopolymerization initiator system has low photosensitivity for the first exposure, irradiates light having a wavelength different from that of the first exposure, and then generates Bronsted acid or Lewis acid upon exposure to light. An initiator system for polymerizing the polymerizable compound may be used, and those that do not polymerize the cationic polymerizable compound during the first exposure are particularly preferable. Examples of the cationic photopolymerization initiator system include diaryliodonium salts, triarylsulfonium salts, iron allene complexes, and the like. Preferred examples of the diaryl iodonium salts include tetrafluoroborate salts, hexafluorophosphate salts, hexafluoroarsenate salts and hexafluoroantimonate salts of iodonium compounds shown in the photoradical polymerization initiator system. Preferable triarylsulfonium salts include triphenylsulfonium, 4-tertiarybutyltriphenylsulfonium, and the like.

  In the photosensitive composition, a binder resin, a thermal polymerization inhibitor, a silane coupling agent, a plasticizer, a colorant, and the like may be used in combination as necessary. The binder resin is used to improve the film formability and film thickness uniformity of the composition before hologram formation, and to stabilize interference fringes formed by polymerization by irradiation with light such as laser light until post-exposure. Used to make it exist. The binder resin only needs to be compatible with the cationic polymerizable compound or the radical polymerizable composition, and specific examples thereof include chlorinated polyethylene, polymethyl methacrylate, methyl methacrylate, and other (meth) acrylic acid alkyl esters. And a copolymer of vinyl chloride and acrylonitrile, polyvinyl acetate, and the like. The binder resin may have reactivity such as a cation polymerizable group in its side chain or main chain.

  In the composition of the photosensitive composition, the cationic polymerizable compound is 2 to 70% by mass, preferably 10 to 50% by mass, and the radical polymerizable compound is 30 to 90% by mass, preferably 40%, based on the total weight of the composition. -70% by mass, photo radical polymerization initiator system is 0.3-8% by mass, preferably 1-5% by mass, and photocationic polymerization initiator system is 0.3-8% by mass, preferably 1-5% by mass. The total amount is preferably 100% by mass.

  The photosensitive composition is composed of essential components and optional components as they are, or as necessary, ketone solvents such as methyl ethyl ketone, ester solvents such as ethyl acetate, aromatic solvents such as toluene and xylene, and cellosolves such as methyl cellosolve. It is prepared by blending with a solvent, an alcohol solvent such as methanol, an ether solvent such as tetrahydrofuran or dioxane, or a halogen solvent such as dichloromethane or chloroform and mixing in a cool and dark place using, for example, a high-speed stirrer.

  A recording layer made of a photosensitive composition is prepared by applying a coating solution of the photosensitive composition (solid content: 15 to 25% by mass) with a bar coating or spin coating if the support film is in a single sheet (each sheet) state. It is formed by coating or dipping. Moreover, if the support film is applied in a roll-like long state, it may be applied by gravure coating, roll coating, die coating, comma coating, or the like. The volume hologram layer is solidified by means of drying or curing according to the coating solution.

  The volume hologram layer uses light such as laser light (for example, a wavelength of 300 to 1200 nm) by a normal holographic exposure apparatus, polymerizes a radical polymerizable compound, and records interference fringes therein. At this stage, a diffracted light by the recorded interference fringes is obtained and a hologram is formed. In order to further polymerize the unreacted cationic polymerizable compound, the photocation polymerization initiator system is used as a post-exposure. A hologram may be formed by irradiating the entire surface with photosensitive light (for example, a wavelength of 200 to 700 nm). Note that the diffraction efficiency, the peak wavelength of the diffracted light, the half-value width, and the like can be changed by treating the recording layer with heat or infrared rays before post-exposure. In the present invention, the reproduction wavelength of the volume hologram is, for example, 300 nm to 1,200 nm.

  The thickness of the volume hologram layer is 5 μm to 10 μm, preferably 7 μm or less. Although depending on the strength of the magnetic field of the magnetic layer, if the thickness of the layer provided on the magnetic layer is 10 μm or less as a whole, sufficient magnetic field strength of the magnetic layer can be secured, and the magnetic card Writing to the magnetic layer from the surface is possible, and recorded data can be read satisfactorily.

  The volume hologram layer in the present invention has a glass transition temperature of 50 ° C. or higher, preferably 80 ° C. or higher, more preferably 100 ° C. or higher, in a state where hologram recording is performed. The upper limit is not particularly limited. Thereby, since the heat-pressure transfer conditions can be made sufficient in the production of the magnetic card, a magnetic card having excellent adhesion can be obtained.

Further, the volume hologram layer in the present invention has a breaking strength of 0.01 kgf / mm ^{2 to 5} kgf / mm ² , preferably 0.03 kgf / mm ^{2 to 3} kgf / mm ² , and a breaking elongation of 0.01%. -30%, preferably 0.1% -10%.

  Furthermore, since the volume hologram layer in the present invention can be a relatively strong film having a pencil hardness (JIS K5400-1990) of 3B to 3H, it is possible to form a magnetic card surface having excellent wear resistance against the magnetic head.

Incidentally, “HRF800X001” (DuPont) which is a similar volume hologram recording material has a glass transition temperature lower than 50 ° C. after the same treatment. The breaking strength is 2.30 kgf / mm ² , the breaking elongation is 138%, the pencil hardness is 4B to 5B, and it is soft and gives the magnetic card surface wear resistance against the magnetic head. Has a problem. Further, when manufacturing a magnetic card, there is a problem that the conditions for thermal pressure transfer without affecting the recorded hologram image become severe.

  Since the volume hologram is difficult to manufacture and record, it is used not only as a design property but also as, for example, an authentication mark for preventing counterfeiting. Since it can be made excellent, peeling from the surface of the magnetic card is difficult, and anti-counterfeiting such as reattaching to another magnetic card can be further enhanced as compared with a normal volume hologram material.

  The glass transition temperature of the volume hologram layer is measured with a solid viscoelasticity analyzer RSA-II (manufactured by Rheometrics). The breaking strength and breaking elongation are measured by an “SV-201-E” tensile / compression tester manufactured by Imada Seisakusho in accordance with JIS K7127-1989.

  The light diffraction image reproduced by the volume hologram layer is expressed as a character, a figure, a symbol, or a combination thereof, or a combination of these and a color. Since the volume hologram layer has transparency, characters or figures expressed by the print layer can be visually observed. Further, by making the color of the volume hologram layer and the color of the print layer have a complementary color relationship, it is possible to avoid the display of the print layer from being darkened by the volume hologram. Therefore, even if the print layer and the volume hologram layer are provided so as to overlap in the thickness direction, both images can be visually observed, and an image can be drawn on the card substrate without being restricted by each other.

  A transparent protective layer 21 made of a transparent resin may be provided on the volume hologram layer. Examples of the transparent resin include thermoplastic resins, ionizing radiation curable resins, thermosetting resins, and the like. Examples of the thermoplastic resin include methacrylic resins such as polymethyl methacrylate, polyacrylic ester resins, polyvinyl chloride resins, cellulose resins, silicone resins, chlorinated rubber, and casein. In addition, the ionizing radiation curable resin includes an electron beam curable resin or an ultraviolet curable resin. The latter ultraviolet curable resin includes the photopolymerization initiator and the sensitizer, and the former electron beam curable resin. The components are the same as those of the mold resin.

  An ionizing radiation curable resin is generally a monomer, oligomer or polymer having a radically polymerizable active group in its structure as a film-forming component, and a (meth) acrylic acid ester as a monomer. Examples of the derivatives, etc., and oligomers and polymers include urethane acrylate and polyester acrylate. In order to obtain an ultraviolet curable resin, a photopolymerization initiator as a photopolymerization initiator in the above-described monomer or the like having a radical polymerizable active group, α-aminoxime ester, tetramethylthiuram monosulfide, thioxanthone In addition, a composition to which n-butylamine, triethylamine, tri-n-butylphosphine or the like is added as a photosensitizer may be used.

  The transparent surface protective layer may appropriately contain additives such as a lubricant for imparting friction resistance with the magnetic head, and various surfactants may be added from the viewpoint of applicability. . Further, the transparent protective layer may be colored with a predetermined color (for example, metallic color), thereby further enhancing the design effect.

The composition for forming the transparent protective layer is dispersed and mixed together with an appropriate solvent, applied onto a temporary substrate having a release surface, dried or cured, and then subjected to lamination with a volume hologram layer. Good. As a method for curing the ionizing radiation curable resin composition, for example, in the case of electron beam irradiation, an electron beam accelerator such as a Cockloft Walton type is used, and an electron beam of 50 to 1000 KeV, preferably 100 to 300 KeV is set to 0. .1-100 Mrad. , Preferably 1-10 Mrad. Performed by irradiating, In the case of ultraviolet irradiation, 0.1~10000mJ / cm ² ultraviolet light emitted from a light source such as an ultra-high pressure mercury lamp, and preferably carried out by irradiating 10~1000mJ / cm ² Good.

  The transparent protective layer may be formed to have a film thickness of 0.1 μm to 5 μm, preferably 0.5 to 3 μm after drying, and may have an appropriate film thickness in consideration of recording or reading on the magnetic layer.

  A transparent protective film may also be used, such as polyethylene film, polypropylene film, poly (ethylene fluoride) film, poly (vinylidene fluoride) film, poly (vinyl chloride) film, poly (vinylidene chloride) film, ethylene-vinyl alcohol film, poly (vinyl alcohol). A film such as a film, a polymethyl methacrylate film, a polyether sulfone film, a polyether ether ketone film, a polyamide film, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer film, a polyethylene terephthalate film or a polyimide film may be used.

  The transparent protective film is preferably provided with an easy adhesion treatment such as a corona treatment or a flame treatment, or an easy adhesion layer such as an acid-modified polyester resin on the laminated surface. Further, the outer surface may be subjected to a hard coat treatment as necessary. For the hard coat treatment, for example, silicone, fluorine-containing silicone, melamine alkyd, urethane acrylate (ultraviolet curable) or the like may be applied by dipping, spraying, roll coating or the like. In addition, the surface of the hard coating surface of the surface protective film may be subjected to a mold release process in order to prevent the film from being peeled off by, for example, attaching another film. For the release treatment, a fluorine release agent, a silicone release agent, a stearic acid release agent, a wax release agent, or the like may be applied by a dipping method, a spray method, a roll coating method, or the like. The film thickness of the transparent surface protective film is preferably an appropriate film thickness in consideration of recording or reading on the magnetic layer.

  Next, an example of a method for manufacturing a magnetic card is shown.

  (1) The magnetic tape is stacked on a predetermined position of the oversheet forming a part of the base sheet to obtain a magnetic layer / oversheet laminate.

(2) The magnetic layer / oversheet laminate obtained in (1), the white opaque core sheet, and the transparent oversheet are stacked so that the arrangement of FIG. 2 is obtained, and the temperature is 150 ° C., the pressure is 25 kg / cm ² , A card substrate having a magnetic layer on one surface is obtained by hot pressing under conditions of 15 minutes.

  (3) After a thin film layer is formed by vapor deposition or the like so as to conceal the magnetic layer on a part or all of the card substrate having a magnetic layer, a pattern or the like is formed on the thin film layer or on the card substrate region. Is appropriately printed to provide a print layer.

  (4) After a transparent protective layer is applied and formed on a peelable temporary substrate, a volume hologram layer on which a volume hologram is recorded is laminated, and an adhesive layer is further laminated to produce a volume hologram transfer foil.

  Examples of the peelable temporary base material include a peeled polyethylene terephthalate film and a polypropylene film. Adhesives include vinyl chloride / vinyl acetate copolymer, ethylene / vinyl acetate copolymer, vinyl chloride / propionic acid copolymer, rubber resin, cyanoacrylate resin, cellulose resin, ionomer resin, polyolefin copolymer. A heat-sealable resin such as a polymer or an adhesive resin is used as a binder, and after adding a plasticizer, a stabilizer, a curing agent, etc. as necessary, it can be obtained by sufficiently kneading with a solvent or diluent. It is good to form with the dry film thickness of 3 micrometers.

  (5) The volume hologram transfer foil obtained in the above (4) is laminated from the adhesive layer side on the printed layer side in the laminate obtained in the above (3), and thermally laminated at 120 ° C. to 140 ° C.

  (6) A printed layer is provided on the back side of the card substrate, and further covered with a back side protective layer. The back side protective layer is formed, for example, by applying a transparent or translucent resin such as vinyl chloride, or by laminating if it is a film.

  (7) A laminated body in which each layer is laminated is thermocompression bonded, punched into a predetermined magnetic card shape, and post-processed to produce a magnetic card having a predetermined total thickness. The temporary base material on the volume hologram layer is preferably laminated until it is used.

  In the first magnetic card, the volume hologram layer has transparency and the underlayer can be seen through, so that characters or figures expressed by the printed layer can be seen. In addition, if the light diffraction image of the volume hologram layer and the image of the print layer have a complementary color relationship, the print layer can be clearly observed. Therefore, both the print layer and the volume hologram layer may be overlapped in the thickness direction. The images can be visually observed, and the images can be drawn on the card substrate without being restricted by each other.

  In addition, the magnetic layer is concealed from the surface of the magnetic card by a thin film made of a metal layer or the like, and the location of the magnetic layer can be concealed.

  In addition, a thin film layer, a printing layer, a volume hologram layer, and a transparent protective layer are laminated on the magnetic layer, but the thin film layer is thinned by a vapor deposition method or the like, and the specific material layer capable of thinning the volume hologram layer Therefore, the spacing loss due to each layer stacked on the magnetic layer can be reduced, and the strength of the magnetic field during reading by the magnetic head can be ensured. Further, since the volume hologram layer is a specific material layer that enables a relatively strong film formation, wear resistance can be imparted to the surface of the magnetic card.

  Next, a second magnetic card of the present invention will be described with reference to FIGS.

  FIG. 3 is a plan view of the second magnetic card of the present invention, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. As shown in FIGS. 3 and 4, the magnetic card 20 has a printed layer 14, an information display layer 17, an oversheet layer 16 a, a magnetic layer 12, a volume hologram layer 15, and a transparent protective layer 21 on the surface of the card base 11. The printed layer 14A and the back side protective layer 16b are laminated on the back surface.

  In FIG. 4, the print layer 14, the oversheet layer 16a, and the volume hologram layer 15 are illustrated as being provided on the entire surface of the card substrate region. However, the print layer 14 may be provided on a partial region of the card substrate. Good. Further, the oversheet layer 16a may be provided in a partial region of the card base material, but the magnetic layer 12 needs to be provided in a printed layer region having substantially the same color as that color. Further, the volume hologram layer 15 may be provided in a partial region of the card substrate. The transparent protective layer 21 is preferably provided in the entire area of the card base. In addition, a printing layer may be provided as appropriate between each of the above layers.

  The card base material 11 can be the same card base material as described in the first magnetic card section, but is made of, for example, polyvinyl chloride (PVC) from the viewpoint of making the magnetic card thickness predetermined. In this case, a base sheet having a three-layer structure obtained by hot pressing a white PVC core sheet having a thickness of 280 μm / a white PVC core sheet having a thickness of 280 μm / a transparent PVC oversheet having a thickness of 100 μm is exemplified.

  A printing layer 14 is provided by silk printing or the like on a part or the entire region of the card base on the core sheet side. The information display layer 17 is a character, a figure, a symbol, or a combination thereof, and may be printed in a color different from the color of the print layer. For example, characters such as “CASH CARD”, personal information, etc. are printed. The If the information display layer is, for example, a white color, a solid layer of a black color is exemplified as the color of the print layer arranged as the base.

  Next, a transparent oversheet 16a having a film thickness of 100 μm in which the magnetic layer 12 is laminated by hot pressure is laminated on a part or all of the card substrate including the printed layer area. When laminating, it is preferable that the magnetic layer side be laminated with the volume hologram layer side, whereby the spacing loss when the magnetic card is formed can be reduced, and reading and writing of magnetic information can be ensured.

  In addition, as shown in FIG. 4, the color of the magnetic layer and the color of the print layer may be substantially the same color and arranged on the print layer. For example, by forming the print layer with black ink, It can be excellent in the concealment property of the arrangement | positioning location of a layer.

  Next, as in the first magnetic card, a volume hologram layer 15 and, if necessary, a transparent protective layer 21 are provided in a part or all of the card substrate including the print layer region and the magnetic layer region.

  Further, similarly to the first magnetic card, a printed layer 14A and a back side protective layer 16b are provided on the back side of the card base 11. Further, the information display layer 17 is provided as necessary, and is provided on the print layer in FIG. 4, but may be provided, for example, between the oversheet layer 16a and the volume hologram layer.

  A method for manufacturing the second magnetic card 20 will be described.

  (1) A magnetic tape / a transparent oversheet laminate is obtained by stacking a magnetic tape at a predetermined position on a transparent oversheet.

  (2) The printed layer 14 is provided by printing a pattern or the like on one surface of the white core sheet.

  (3) Four layers of an oversheet having the magnetic layer obtained in (1), a white core sheet having a printed layer obtained in (2), a white core sheet, and an oversheet so as to have the arrangement shown in FIG. After the stacking, hot pressing is performed to obtain a laminate having a printed layer / oversheet layer / magnetic layer on a base sheet composed of oversheet / white core sheet / white core sheet.

  (4) After the transparent protective layer is applied and formed on the temporary substrate having peelability, the volume hologram layer on which the volume hologram is recorded is laminated, the volume hologram is fixed, and the adhesive layer is further laminated. A volume hologram transfer foil is prepared.

  (5) The volume hologram transfer foil obtained in the above (4) is laminated on the magnetic layer side of the laminate obtained in the above (3) from the adhesive layer side and thermally laminated at 120 ° C. to 140 ° C.

  (6) The printed layer 14A is provided on the back surface of the base sheet, and the back surface side protective layer 16b is further provided.

  (7) After the card on which each layer is laminated is thermocompression bonded, it is punched into a predetermined shape and post-processed to produce the magnetic card 20. Note that the temporary base material on the volume hologram layer is preferably laminated until it is used.

  In the second magnetic card, the printed layer and the magnetic layer have substantially the same color so that the location of the magnetic layer can be concealed, so that the anti-counterfeiting property is improved and the security of the magnetic card is increased. it can. Further, as described in the first magnetic card, since the volume hologram layer has transparency and the base can be seen through, characters or figures expressed by the printed layer can be visually observed. In addition, if the light diffraction image of the volume hologram layer and the image of the print layer have a complementary color relationship, the same effect can be obtained. If the print layer is black, the light diffraction image of the volume hologram layer can be obtained. It is preferable because it is easy to see.

  The volume hologram layer and the transparent protective layer are laminated on the magnetic layer. Since the volume hologram layer is made of a specific material layer that can be thinned, the spacing loss can be reduced and the magnetic field at the time of reading by the magnetic head can be reduced. Strength can be secured. Further, since the volume hologram layer is a specific material layer that enables a relatively strong film formation, a magnetic card having excellent wear resistance against the magnetic head can be obtained.

  Next, a third magnetic card of the present invention will be described with reference to FIGS.

  FIG. 5 is a plan view of a third magnetic card of the present invention, FIG. 6 is a cross-sectional view taken along the line A-A in FIG. 5, and FIG. 7 is a diagram for explaining the light transmittance regulation area and the area outside the light transmittance regulation area. It is a figure for doing.

  As shown in FIGS. 5 and 6, the third magnetic card 30 is, for example, composed of a three-layer laminate of an oversheet 110 / core sheet 100 / oversheet 120 as the card base 11, and the surface side thereof. And a magnetic layer concealing printing layer 19 for concealing the magnetic layer is provided in a part of the card base region, and a visible light transmitting layer is provided in the other region of the card base region. This is part 18. In addition, an information display layer 17 is appropriately provided on these upper layers, and an adhesive layer 31, a volume hologram layer 15, and a transparent protective layer 21 are laminated on a part or the entire surface of the card base material region. Also, a magnetic layer concealing print layer 23 is laminated on the back surface of the card substrate at a position corresponding to the magnetic layer concealing print layer 19. The print layer may be provided between the appropriate layers described above.

  In the ISO standard for magnetic cards and the like, as shown in FIG. 7, in order to detect information recorded on the magnetic layer by an optical sensor, an area 21 mm from the upper end of the card and an area 10 mm from the lower end are respectively It is determined that the transmittance control areas 1301 (width a) and 1302 (width b) are provided. This region must shield a region having a wavelength of 400 to 1000 nm corresponding to the infrared wavelength region from the visible light region. Note that the above definition is not applicable to the region 1100 outside the light transmittance regulation area.

  The third magnetic card satisfies this standard and uses the region 1100 outside the light transmittance regulation area as the visible light transmission layer portion, and sandwiches the visible light transmission layer portion 18 as shown in FIGS. The magnetic layer concealing printing layer 19 is used as both ends, and each of the long sides is coated in a stripe pattern having the same length as the long side of the card. The reason why the lengths of the long sides of the magnetic layer concealing printing layers 19 and 23 are specified is to make the reader recognize the length of the card.

  The visible light transmitting layer portion 18 is a visible light transmitting portion from the front surface to the back surface of the magnetic card, and is a so-called “skeleton” type magnetic card. By providing the visible light transmission layer portion, the degree of freedom of various designs that can be displayed on the magnetic card can be expanded. In addition, a visible light opaque bar code or the like can be provided in the visible light transmissive portion, and can be used for various optical sensors.

  The card substrate is required to be transparent, and examples of the constituent material include polyethylene, polypropylene, polystyrene, polyester, polyvinyl chloride, polyvinyl acetate, methacrylic resin, etc., preferably polyvinyl chloride, PET-G Polyester resin. Also, a multi-layer substrate may be used, and a three-layer structure of a transparent oversheet 110 having a thickness of 50 μm or 100 μm / a transparent core sheet 100 having a thickness of 660 μm or 560 μm / a transparent oversheet 120 having a thickness of 50 μm or 100 μm, An example is a combination in which the transparent core sheet has a four-layer structure with two transparent core sheets each having a thickness of 330 μm or 280 μm, and the total thickness is approximately 0.76 mm.

  Examples of the transparent oversheet 110 include the above-described resin systems, or those obtained by alloying or coextruding a plurality of types of resins, such as “Diafix PG-MCT” manufactured by Mitsubishi Plastics. Moreover, as the transparent core sheet 100, an impact modifier having a refractive index substantially equal to the refractive index of the constituent resin may be added in order to ensure transparency and substrate strength. For example, when a polyvinyl chloride substrate having a refractive index of 1.53 is used, a methyl methacrylate / butadiene / styrene copolymer (MBS) having a refractive index of 1.53 is added, and a PET having a refractive index of 1.56 is used. -When using a G base material, what added MBS with a refractive index of 1.55 is illustrated. Examples of the transparent core sheet 100 include “Diafix PG-SK2” manufactured by Mitsubishi Plastics, Inc.

  If necessary, an infrared absorber may be kneaded into the transparent core sheet, or the transparent oversheet and the transparent core sheet may be laminated via a visible light transmissive ink layer having infrared absorptivity. Good.

  The magnetic layer 12 is provided at a required position on the transparent oversheet 110 in the same manner as the first magnetic card. Since a magnetic layer concealing printing layer, volume hologram layer, and the like are laminated on the magnetic layer, a powder-rich high-density magnetic recording material is used as the magnetic layer material in consideration of a decrease in read output due to spacing loss. The magnetic layer material described in the first magnetic card may be used.

  The magnetic layer concealing printing layer 19 is formed by silk screen printing using a magnetic layer concealing ink. As the magnetic layer concealing ink, a metal such as aluminum is pulverized to a predetermined size, It is better to use metal powder adjusted so that the reflectance and opacity of light in the region of 400 to 1000 nm are maximized, and the viscosity is suitable for silk screen printing using a solvent together with a binder resin. Examples thereof include “VAHS No. 2” manufactured by Showa Ink Co., Ltd. The printing layer 19 for concealing the magnetic layer is provided with a thickness of 3 to 5 μm for the purpose of concealing the magnetic layer and the appropriately provided design from the card surface. The magnetic layer concealing printing layer 23 is provided with a thickness of 2 to 6 μm so that the position of the magnetic layer cannot be recognized from the back side of the card.

  The information display layer 17 is formed using a printing ink having a known ink composition for silk screen and offset.

  The visible light transmitting layer portion 18 is a region outside the scope of the ISO standard, and a transparent resin layer made of a binder resin alone in an infrared absorbing ink described later may be provided by silk screen printing. However, depending on the card reader, there may be a case where an infrared sensor is arranged in this region for reading, so as described above, the card base material may contain an infrared absorber to provide an infrared shielding function. The infrared absorber is expensive, and the magnetic layer concealing printing layer can also have an infrared shielding function. Therefore, in the present invention, a visible light transmitting layer portion is formed using an infrared absorbing ink having a maximum absorption region in the infrared region, and the magnetic card is compatible with various card readers. .

  The infrared absorbing ink is composed of an infrared absorbing agent and a binder resin, and is dissolved or dispersed in an organic solvent to have a viscosity suitable for silk printing. Examples of infrared absorbers include metal oxides such as iron oxide, cerium oxide, tin oxide, and antimony oxide, indium-tin oxide, tungsten hexachloride, tin chloride, cupric sulfide, chromium-cobalt complex salts, and thiol-nickel complexes. And at least one organic infrared absorber such as an aminium compound, a diimonium compound, and a phthalocyanine compound. The binder resin is suitably selected from bisphenol A type epoxy resin, bisphenol F type epoxy resin, polyester resins such as polyvinyl acetate and polyvinyl propionate, and polyolefin resins such as polyethylene, polypropylene, polystyrene, and ethylene-vinyl acetate resin. Selected. The infrared absorber and the binder resin are in a ratio of 2 to 10 parts by mass with respect to 100 parts by mass of the binder resin. Then, as shown in FIG. 6, silk screen printing is performed in a stripe pattern with a dry film thickness of 3 to 5 μm on the card base material region where the magnetic layer concealing print layer 19 is not provided. Furthermore, the infrared absorption printing layer may be appropriately provided on the transparent oversheet of the card substrate or on the transparent core material.

  As in the first magnetic card, the volume hologram layer 15 and the volume hologram layer 15 are necessary in a part or all of the area of the card substrate provided with the visible light transmitting layer portion and the magnetic layer concealing printing layer. Accordingly, a transparent protective layer 21 is provided. On the back surface of the card substrate, the magnetic layer concealing print layer 23 is provided at a position corresponding to the magnetic layer concealing print layer 19 using the same material as described above.

  In the visible light transmitting layer portion region, the third magnetic card may have a light transmittance of 60% or more in the visible light region (wavelength 380 nm to 780 nm) in the stacking cross-sectional direction. The light transmittance in the infrared light region (wavelength 800 nm to 1050 nm) is preferably 3% or less.

  An example of the manufacturing method of the 3rd magnetic card 30 is shown.

  (1) After a magnetic tape is stacked on a predetermined position of the oversheet 110 and heat-pressed to obtain a magnetic layer / oversheet laminate, the magnetic layer concealing printing layer 19 is pattern printed so as to cover the magnetic layer. Further, the visible light transmission layer portion 18 is pattern-printed in other areas.

  (2) After placing the oversheet 110 obtained in (1) on one surface of the transparent core sheet 100 and the other oversheet 120 on the other surface so as to have the arrangement shown in FIG. To do.

  (3) After the transparent protective layer is applied and formed on the temporary substrate having peelability, the volume hologram layer on which the volume hologram is recorded is laminated, the volume hologram is fixed, and the adhesive layer is further laminated. A volume hologram transfer foil is prepared.

  (4) On the laminate obtained in (2) above, the volume hologram transfer foil obtained in (3) above is laminated from the adhesive layer side so as to have the arrangement shown in FIG. Heat laminate.

  (5) A back surface magnetic layer concealing print layer is formed in a pattern on the back surface of the base sheet.

  (6) After the card on which each layer is laminated is thermocompression bonded, it is punched into a predetermined shape and post-processed to produce a magnetic card. Note that the temporary base material on the volume hologram layer is preferably laminated until it is used.

  The third magnetic card can be provided with a visible light transmissive layer to increase the degree of freedom of various designs that can be displayed on the magnetic card. In addition, a visible light permeable bar code or the like is provided in the visible light transmissive part. It is possible to provide various optical sensors. In addition, since the magnetic layer can be concealed by the magnetic layer concealing printing layer, the anti-counterfeiting property is excellent and the security of the magnetic card can be enhanced.

  In addition, the magnetic layer concealing print layer, volume hologram layer, and transparent protective layer are laminated on the magnetic layer, but the volume hologram layer is made of a specific material layer that can be thinned, so that the spacing loss can be reduced and the magnetic layer can be reduced. The strength of the magnetic field when reading by the head can be ensured. Further, since the volume hologram layer is a specific material layer that enables a relatively strong film formation, a magnetic card having excellent wear resistance against the magnetic head can be obtained.

  The first to third magnetic cards of the present invention may be provided with functions such as an IC card and an optical card by providing an IC module and an optical recording unit on the back side of the substrate. The first to third magnetic cards can be used as various cards such as a cash card, a credit card, a certification card, or a membership card.

  Examples of the magnetic card of the present invention will be described below.

(Preparation of volume hologram layer transfer foil)
(First laminate comprising release film / volume hologram layer / release film)
On a PET film {Toray Industries, Lumirror T-60, thickness 50 μm}, as a hologram forming material, the following composition / polymethyl methacrylate resin (molecular weight 200,000)
... 500 parts by mass · 3,9-diethyl-3'-carboxylmethyl-2,2'-thiacarbocyanine iodine salt · · 5 parts by mass · diphenyliodonium hexafluoroantimonate
... 60 parts by mass of 2,2-bis [4- (acryloxydiethoxy) phenyl] propane
... 800 parts by mass of pentaerythritol polyglycidyl ether ... 800 parts by mass of volume hologram recording material is applied by gravure coating to a dry film thickness of 5 µm, and surface release treatment PET is applied to the coated surface. A film (“SP-PET” 50 μm, manufactured by Tosero Co., Ltd.) was laminated to prepare a first laminate.

(Substrate / transparent surface protective layer second laminate)
On a PET film {Toray Industries, Lumirror T-60, thickness 50 μm} as a transparent surface protective layer,
・ Pentaerythritol triacrylate (PET30; manufactured by Nippon Kayaku Co., Ltd.)
... 4 parts by mass / photoinitiator (Irgacure-184; manufactured by Ciba Geigy Japan)
... 0.2 parts by mass / methyl isobutyl ketone ... 37 parts by mass of the coating solution was coated uniformly using a slide die so that the film thickness after drying was 1 µm.

The obtained coating film was cured at a dose of 1000 mJ / cm ² (365 nm equivalent) using an H bulb of a UV irradiation device (manufactured by Fusion UV System Japan Co., Ltd.) as a light source to prepare a second laminate.

(Thermal adhesive layer / third laminate of release sheet)
On the surface releasable PET film (“SP-PET” 50 μm, manufactured by Tosero Co., Ltd.), a heat-sensitive adhesive (EC2000, manufactured by Chuo Rika Co., Ltd.) was applied with a dry film thickness of 1 μm, and the third laminate was formed. Produced.

(Production of volume hologram transfer foil)
A Lippmann hologram is recorded on the first laminate using a laser beam having a wavelength of 514 nm, heated at 100 ° C. for 10 minutes, one release film is peeled off, and the second laminate is placed on the peeled surface of the transparent laminate. Lamination was performed at 80 ° C. from the surface protective layer side to form a laminated structure of base material / transparent surface protective layer / volume hologram layer / release film.

After fixing the hologram to the obtained laminated structure using a high pressure mercury lamp at an irradiation dose of 2500 mJ / cm ² , the release film is peeled off, and the third laminated body is peeled from the heat-sensitive adhesive side on the peeled surface. Lamination was performed at 100 ° C. to prepare a volume hologram transfer foil of base material / transparent surface protective layer / volume hologram layer / heat-sensitive adhesive layer / release sheet. The diffraction efficiency of the volume hologram layer was 47%.

(Production of magnetic card)
On a PVC oversheet with a thickness of 100 μm, magnetic tape {Dainippon Ink Co., Ltd. “Memory Dick T-1202” magnetic layer thickness 10 μm, heat seal (HS) layer 1-2 μm, width 7.3 mm, magnetic field strength 650 (Oe)} and heat-pressing to laminate a magnetic layer, and then laminating a 560 μm thick white core sheet and a 100 μm thick PVC oversheet in this order on the other side of the oversheet. After that, hot pressing was performed under the conditions of a temperature of 150 ° C. and a pressure of 25 kg / cm ² for 15 minutes to obtain a base sheet having a magnetic layer on one surface.

  Aluminum is vacuum-deposited on the entire magnetic layer of this base sheet to form a thin film layer (thickness 500 mm) to conceal the magnetic layer, and then a pattern is printed on the thin film layer by silk printing to obtain a thickness of 1 μm. A laminate was obtained by providing a printing layer.

  After peeling off the release sheet of the volume hologram transfer foil obtained above on the printed layer in the laminate, the laminate was laminated at 120 to 140 ° C. from the adhesive side to transfer the volume hologram layer.

  On the back side of the card substrate, after printing a pattern and precautions on silk printing, a 1 μm thick printed layer is provided, and then a 0.1 mm thick back side made of polyvinyl chloride resin. A protective layer was applied and formed.

  The obtained laminate was heat-pressed for 1 minute at 150 ° C. and 10 kg / cm using a hot stamp device, and then punched into a predetermined outer shape as the magnetic card shown in FIGS. Produced.

  The pencil hardness of the magnetic card surface was measured by JIS K5400 and found to be “H”. In addition, the same hologram recording was performed on the first laminate of the release film / volume hologram layer / release film prepared in the volume hologram transfer foil section, and then the pencil hardness of the surface of the volume hologram layer was measured in the same manner. The glass transition temperature was 90 ° C.

  When R / W ("CT-670" manufactured by Neuron Co., Ltd.) was used and a reading test was performed 4000 times after recording, appearance damage such as scratches did not occur on the surface of the magnetic card, and magnetic information was read. In addition, when the obtained magnetic card was visually observed from the surface, the magnetic layer was concealed by the thin film layer, and the formation position could not be confirmed. The printed layer was also clearly visible.

  On a PVC oversheet with a thickness of 100 μm, magnetic tape {Dainippon Ink Co., Ltd. “Memory Dick T-1202” magnetic layer thickness 10 μm, heat seal (HS) layer 1-2 μm, width 7.3 mm, magnetic field strength 650 (Oe), black} were stacked and heat-pressed to laminate the magnetic layer, thereby obtaining a first laminate.

  A black solid printing layer with a thickness of 3 to 5 μm was formed on the entire area of one side of the white core sheet with a thickness of 560 μm using silk screen printing and then thickened with white ink. A thickness of 1 μm was formed to obtain a second laminate.

After the obtained first laminated body, second laminated body, and another PVC oversheet having a thickness of 100 μm are stacked in the laminated form shown in FIG. 4, the temperature is 150 ° C., the pressure is 25 kg / cm ² , and the condition is 15 minutes. Hot pressing was performed to obtain a laminate having a magnetic layer on one surface.

  On the magnetic layer of the obtained laminate, the volume hologram transfer foil produced in Example 1 was peeled off from the release sheet, and then laminated at 120 to 140 ° C. from the adhesive side to transfer the volume hologram layer.

  After printing a pattern or precautions by silk printing on the back surface of the base material in the laminate, a printed layer having a thickness of 1 μm is provided, and then a back surface having a thickness of 0.1 mm made of polyvinyl chloride resin. A side protective layer was applied and formed.

  The obtained laminate was heat-pressed for 1 minute under the conditions of 150 ° C. and 10 kg / cm using a hot stamp apparatus, and then punched into a predetermined outer shape as the magnetic card shown in FIGS. A card was made.

  When the pencil hardness of the magnetic card surface was measured in the same manner as in Example 1, it was “B”. In addition, when R / W (“CT-670” manufactured by Neuron Co., Ltd.) was used and a reading test was performed 4000 times after recording, appearance damage such as scratches did not occur on the surface of the magnetic card. No information reading failure occurred.

  Further, when the obtained magnetic card was visually observed from the surface, it was indistinguishable from the underlying printed layer, and its formation position could not be confirmed. Further, the volume hologram image was not affected regardless of the heating conditions at the time of production, and the volume hologram image could be seen well.

  At a predetermined position on a transparent oversheet having a thickness of 100 μm (“Diafix PG-MCT” manufactured by Mitsubishi Plastics), a magnetic tape {“Memory Dick T-1202” manufactured by Dainippon Ink Co., Ltd., a magnetic layer thickness of 10 μm, heat seal ( HS) layers 1 to 2 μm, width 7.3 mm, magnetic field strength 650 (Oe)} were stacked and heat-pressed to stack a magnetic layer.

  A magnetic layer concealing printing layer is formed on the magnetic layer side of the obtained laminate at a position corresponding to the light transmittance regulation areas 1301 and 1302 shown in FIG. 7 at a position covering the magnetic layer as shown in FIG. Thus, silkscreen printing was performed using a shielding ink (“VAHS No. 2 Silver” manufactured by Showa Ink Co., Ltd.) to a dry film thickness of 5 μm.

Next, a polyester resin that is a binder for silk screen printing having the following composition so that a visible light transmitting layer portion is formed in a portion corresponding to the region 1100 outside the light transmittance regulation area shown in FIG.
・ ・ 100 parts by mass ・ Phthalocyanine infrared absorber having a maximum absorption range at wavelengths of 800 nm to 950 nm (“YKR5010” manufactured by Yamamoto Kasei Co., Ltd.) ・ ・ 3.0 parts by mass ・ System infrared having a maximum absorption range at wavelengths of 950 nm to 1050 nm Absorbent ("YKR3080" manufactured by Yamamoto Kasei Co., Ltd.) ・ ・ 10.0 parts by mass ・ Solvent (methyl ethyl ketone) ・ ・ 50 parts by mass ・ Solvent (toluene) ・ ・ 50 parts by mass Infrared absorbing ink is used. Then, silk screen printing was performed so that the dry film thickness was 5 μm.

Next, the obtained laminate, a transparent core sheet having a thickness of 560 nm (“Diafix PG-SK2” manufactured by Mitsubishi Plastics), and a transparent oversheet having a thickness of 100 μm (“Diafix PG-MCT manufactured by Mitsubishi Plastics”). Were stacked so as to have the arrangement shown in FIG. 6 and then hot-pressed under the conditions of a temperature of 150 ° C., a pressure of 25 kg / cm ² , and 15 minutes to obtain a laminate.

  The volume hologram transfer foil produced in Example 1 was peeled off the release sheet and laminated at 120 to 140 ° C. from the adhesive side to transfer the volume hologram layer to the magnetic layer side of the obtained laminate.

  Next, as shown in FIG. 6, on the back surface of the base material, a shielding ink (“VAHS No. 2 Silver” manufactured by Showa Ink Co., Ltd.) is placed at a position corresponding to the printing layer for concealing the front side magnetic layer. ) Was used for silk screen printing so as to have a dry film thickness of 5 μm to form a printed layer for concealing the back magnetic layer.

  The obtained laminate was heat-pressed for 1 minute at 150 ° C. and 10 kg / cm using a hot stamping apparatus, and then punched into a predetermined outer shape of the magnetic card shown in FIGS. 5 and 6 to obtain a third magnetic card. Was made.

  The infrared transmittance at a wavelength of 800 nm to 1050 nm in the visible light transmission pattern of the magnetic card was 3% or less as measured using a spectrophotometer (“model name UV-3100PC” manufactured by Shimadzu Corporation).

  Further, when the pencil hardness of the magnetic card surface was measured in the same manner as in Example 1, it was “B”.

  In addition, when R / W (“CT-670” manufactured by Neuron Co., Ltd.) was used and a reading test was performed 4000 times after recording, appearance damage such as scratches did not occur on the surface of the magnetic card. No information reading failure occurred. Further, the magnetic card was transparent at a portion corresponding to the visible light transmission layer portion, and when used in an ATM having a mechanism for detecting the passage of the card with an infrared sensor, no problem occurred.

  Further, when the obtained magnetic card was visually observed from the front and back surfaces, the magnetic layer was concealed by the magnetic layer concealing printing layer, and the formation position thereof could not be visually confirmed. Further, the volume hologram image can be visually recognized well, and the printed layer can also be clearly recognized.

(Comparative example)
Except for using the HRF800x001 film manufactured by DuPont having a three-layer configuration of PET film / hologram recording material layer (film thickness 3 μm) / peelable PET film as the first laminate in the volume hologram layer transfer foil in Example 1, A magnetic card was prepared in the same manner. The hologram recording condition was that a Lippmann hologram was recorded using a laser beam having a wavelength of 514 nm, then 200 mJ UV irradiation was performed using a high-pressure mercury lamp, and hologram recording was performed by heating at 100 ° C. for 10 minutes. The diffraction efficiency of the volume hologram layer was 52%.

  The pencil hardness of the magnetic card surface was measured and found to be “4B”. Further, after hologram recording was similarly performed on the first laminate of release film / volume hologram layer / release film, the pencil hardness on the surface of the volume hologram layer was measured in the same manner to be “5B”. The glass transition temperature was 45 ° C.

  As is clear from the comparison with Example 1, it can be seen that the hardness of the magnetic card surface is greatly influenced by the hardness of the volume hologram layer even if the surface protective layer is the same.

  Further, when the obtained magnetic card was visually observed from the surface, the magnetic layer was concealed by the thin film layer, and the formation position thereof could not be confirmed. An effect on the hologram image was observed.

  Further, when R / W (“CT-670” manufactured by Neuron Co., Ltd.) was used and a reading test was performed 4000 times after recording, appearance damage such as scratches was marked on the surface of the magnetic card, and the volume hologram image was visually recognized. As a result, the visibility deteriorated.

FIG. 1 is a plan view showing the form of the first magnetic card. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a plan view showing the form of the second magnetic card. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a plan view showing the form of the third magnetic card. 6 is a cross-sectional view taken along the line AA in FIG. FIG. 7 is a diagram for explaining a light transmittance regulation area and a region outside the light transmittance regulation area in a magnetic card defined by ISO.

Explanation of symbols

10, 20 and 30 are magnetic cards, 11 is a card base, 12 is a magnetic layer, 13 is a thin film layer, 14 and 14A are printed layers, 15 is a volume hologram layer, 16a is an oversheet layer, and 16 and 16b are back surfaces. Protective layer, 17 is an information display layer, 18 is a visible light transmission layer, 19 is a magnetic layer concealing print layer, 21 is a transparent protective layer, and 23 is a magnetic layer concealing print layer.

Claims (3)

A card base, a magnetic layer for magnetically recording information provided in a part or all of the card base, and a metal layer concealing at least the magnetic layer, and a metal Or a laminated structure comprising a thin film layer formed from a metal compound, a printed layer provided in a part or all of the card substrate including the laminated structure region, the printed layer region and the laminated structure region And a volume hologram layer provided on a part or all of the card substrate, and the volume hologram layer is cationically polymerized in a magnetic card in which magnetic information is recorded / reproduced from the volume hologram layer side. Compound, radical polymerizable compound, photo radical polymerization initiator system that polymerizes a radical polymerizable compound by exposure to light of a specific wavelength, and low sensitivity to light of the specific wavelength There are those made of a photosensitive material comprising a photo-cationic polymerization initiator system for polymerizing cationically polymerizable compound sensitive to light of another wavelength, the glass transition temperature after recording the volume hologram be 50 ° C. or higher A magnetic card having a breaking strength of 0.01 kgf / mm ^{2 to 5} kgf / mm ² , a breaking elongation of 0.01% to 30%, and a pencil hardness of 3B to 3H. A printing layer provided in a part or all of the card substrate, having a predetermined color, and provided in the printing layer area, having substantially the same color as the color in the printing layer, and machine-readable A volume hologram layer provided on a part or all of a region of the card substrate including the layer structure, and a layered structure comprising a magnetic layer for magnetically recording information; In a magnetic card on which magnetic information is recorded / reproduced from the side, the volume hologram layer is a cationic polymerizable compound, a radical polymerizable compound, a photo radical polymerization initiator that is sensitive to light of a specific wavelength and polymerizes the radical polymerizable compound System and photosensitivity comprising a photocationic polymerization initiator system that is sensitive to light of a specific wavelength and polymerizes a cationically polymerizable compound in response to light of another wavelength Are those consisting of fees, and in the volume hologram glass transition temperature after recording 50 ° C. or more, and a breaking strength ^{0.01kgf / mm 2 ~5kgf / mm 2} , also breaking elongation 0.01 % To 30%, and a pencil hardness of 3B to 3H. A transparent card base, a visible light transmitting layer having infrared absorptivity provided on the card base, and a machine reading provided on the base in an area other than the visible light transmitting layer A laminated structure comprising a magnetic layer for magnetically recording information, and a magnetic layer concealing printing layer provided in a region other than the visible light transmitting layer so as to cover the magnetic layer; A volume hologram layer provided in a part or all of the card substrate including a structure region, wherein magnetic information is recorded / reproduced from the volume hologram layer side and the visible light transmission layer portion region; In the magnetic card that oscillates the visible light transmission in the cross-sectional direction, the volume hologram layer is exposed to a cationically polymerizable compound, a radically polymerizable compound, a light having a specific wavelength to polymerize the radically polymerizable compound. From a photosensitive material comprising a photopolymerization initiator system and a photocationic polymerization initiator system that is light-sensitive to light of a specific wavelength and that polymerizes a cationically polymerizable compound in response to light of another wavelength. The glass transition temperature after recording the volume hologram is 50 ° C. or higher, the breaking strength is 0.01 kgf / mm ^{2 to 5} kgf / mm ² , and the breaking elongation is 0.01% to A magnetic card having 30% pencil hardness of 3B to 3H.

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