JP2008262092A - Information recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording medium in which hologram foil properties and image printability are improved while maintaining scratch resistance and antifouling properties since the image printability and hologram transferability are remarkably reduced when the surface of an information recording medium is designed so as to have improved scratch resistance and antifouling properties although scratch prevention and antifouling in the information recording medium are highly desired and the measures to that are to be taken from the viewpoint of design properties. <P>SOLUTION: In the information recording medium requiring a transfer foil or image printing comprising hologram or diffraction grating pattern, an adhesive anchor layer is provided at least to the transfer foil or an image printing part area of the uppermost surface of the information recording medium. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an intermediate transfer recording medium capable of thermally transferring a transfer foil composed of a hologram or a diffraction grating pattern and capable of printing individual information such as characters and facial photographs.

  There are various types of information recording bodies on which information is recorded, but individual information different for each information recording body is often recorded for the purpose of ensuring protection against forgery and alteration. The individual information is, for example, a card such as a deposit / save card or a credit card, or, in the case of a passport or identification card, information identifying the individual such as the name of the holder, a photograph of a face, a serial number or the like in a cash voucher such as a banknote. .

  Moreover, in order to ensure authenticity, the above information recording body is often applied with a light diffraction structure such as a diffraction grating pattern or a hologram, and is applied by being laminated on the surface of the information recording body. .

  In general, in the case of a magnetic card, after the magnetic card is manufactured, characters and images are often formed on the card, or a hologram foil or the like is often laminated, so that the protective layer on the card surface has image printability and hologram foil suitability. Designed with emphasis on that. On the other hand, although it is possible to design a resin with good scratch resistance in an optical card or the like as in Patent Document 1, it is rarely adopted in a magnetic card.

Prior art documents are shown below.
JP-A-8-96422

  In recent years, information recording media have been increasingly demanded to prevent scratches and dirt from the viewpoint of design properties, and have been forced to deal with them. However, improving the scratch resistance and antifouling properties of the surface of the information recording medium and having the ability to print images and the transfer foil made of a hologram or diffraction grating pattern are generally contradictory in the direction of material design. is doing. For example, a fluororesin and a silicone resin are excellent in scratch resistance and antifouling properties, but have low adhesion to other resins.

  An object of the present invention is to provide an information recording medium in which the surface of the information recording medium has scratch resistance and antifouling properties, and has both image printing suitability and transfer foil suitability comprising a hologram or a diffraction grating pattern.

As a solution to achieve the above problems,
The invention according to claim 1 is a transfer foil comprising a hologram or a diffraction grating pattern or an information recording medium that requires image printing.
An information recording medium comprising an adhesive anchor layer in at least the transfer foil or the image printing portion region on the outermost surface of the information recording medium.

  The invention according to claim 2 is the information recording medium according to claim 1, wherein the outermost surface of the information recording body is made of a scratch-resistant protective layer.

  The invention according to claim 3 is the information recording medium according to claim 2, wherein the scratch-resistant protective layer is made of a silicone resin or a fluorine-containing resin.

  The invention according to claim 4 is characterized in that the adhesive anchor layer is made of a urethane resin or a vinyl resin containing a resin component contained in the scratch-resistant protective layer. The information recording medium described in the item.

  The invention according to claim 5 is the information recording medium according to any one of claims 1 to 4, wherein the adhesive anchor layer is formed by hot melt transfer.

  Since this invention is the above structure, there exist the following effects. That is, even in a card having scratch resistance and antifouling properties, the hologram foil and image printability can be improved by providing the adhesive anchor layer of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an example of a laminated structure of an information recording medium (magnetic card) according to the present invention. FIG. 2 is a cross-sectional view showing an example of the configuration of the adhesive anchor transfer foil in the present invention.

  As shown in FIG. 1, the information recording medium (magnetic card) of the present invention has a magnetic recording layer oversheet 2 bonded on a base substrate 1 made of a resin film, and is used for shielding on the card surface side. An ink layer (not shown) and a printing layer 3 are provided, and a scratch-resistant protective layer 4 is provided. Adhesive anchors are provided in a region 6 required for hologram foil or printing.

  Hereinafter, the information recording medium of the present invention will be described in detail with reference to FIG. A sheet obtained by laminating an oversheet 2 having a thickness of about 0.1 mm with vinyl chloride resin or the like on both surfaces of a center core 1 having a thickness of about 0.45 to 0.5 mm made of vinyl chloride resin or the like is used as a card substrate. A magnetic recording layer 7 is provided on the card substrate, and a magnetic stripe having a predetermined width is generally used for the magnetic recording layer. Further, the magnetic stripe can be appropriately selected from either a method of laminating one provided on the oversheet or a method of directly sticking to a card substrate on which the oversheet is laminated. The magnetic stripe can be provided on one side or both sides of the card substrate.

  Next, since the color of the magnetic recording layer 7 (magnetic stripe) on the card substrate is dark brown or black, the first concealing layer is applied to a thickness of about 0.5 to 5 μm to conceal the magnetic recording layer. . If it is applied too thick, it affects the reproduction output of the magnetic recording layer, so it is preferable to select it within the aforementioned thickness range. This concealing layer can be freely designed including on the magnetic recording layer. Therefore, in order to make use of this hiding power, generally used is a method in which high-concentration colored ink or gold or silver ink is used, and screen printing or the like is used for printing.

  Further, the second hiding layer may be provided on the first hiding layer in a thickness of about 0.5 to 5 μm to improve the hiding power.

  Furthermore, the pattern layer 3 is provided on the above-described concealing layer. The hiding (solid ink) layer is preferably a white ink layer, and the pattern layer 3 provided on the surface can use a light colored ink, etc., so that an excellent design can be obtained in terms of design, A thin pattern layer can be obtained by offset printing or the like.

  Further, a protective layer 6 is provided on the entire surface including the pattern layer in order to suppress the wear of the pattern layer and the hiding layer to a minimum. As a measure for improving the scratch resistance of the protective layer 6, a so-called hard coat material may be formed on the entire surface of the card. For example, a high-hardness UV curable resin, an organic-inorganic hybrid resin, a melamine resin, or the like may be used. Can be mentioned. However, high-hardness resins generally tend to have a high degree of crosslinking and often have a high glass transition temperature. For this reason, the adhesion to foil or ink is often poor. As in the present invention, by forming an anchor agent only at a place where image printing or hologram foil transfer is required, image printing suitability and hologram suitability pass even if the structure has excellent scratch resistance. . As this protective layer 6, it is preferable to use a transparent curable resin. The protective layer 6 is preferably made of a resin system having a silicone resin, a fluororesin, and a melamine resin component from the viewpoint of scratch resistance and antifouling properties.

  For example, as a silicone protective layer, 60 parts of silicon acrylic polyol (trade name “8BS-1005N” manufactured by Taisei Fine Chemical Co., Ltd.), 18 parts of isocyanate curing agent (trade name “Coronate HL” manufactured by Nippon Polyurethane Co., Ltd.), polycarbonate urethane 40 parts of a resin (made by Nippon Polyurethane Co., Ltd., trade name “Nipporan 5199”) and 5 parts of polyethylene WAX (manufactured by Toyo Ink Co., Ltd., additive 180) are dissolved in a mixed solvent of ethyl acetate / butyl acetate and 2 μm thick when dried with a roll coater. And aging in a constant temperature room at 40 ° C. for 5 days.

  On the other hand, as a fluororesin-based protective layer, 80 parts of acrylic resin (Mitsubishi Rayon BR80) and 20 parts of fluororesin (Sumitomo 3M Dinion THV) are dissolved in a mixed solvent of methyl ethyl ketone / toluene, and dried to a thickness of 2 μm with a roll coater. A protective layer can be formed by coating.

  Moreover, since a melamine-type protective layer requires a curing temperature higher than the deformation temperature of a card | curd base material for hardening of a melamine, it is good to form a protective layer with a thermal transfer method. For example, 60 parts of a vinyl chloride resin (1700Z made by Shin Daiichi PVC), 30 parts of a silicone / melamine resin (SHC900 made by GE Toshiba Silicone), and 10 parts of cellulose acetate (L-40 made by Daicel Chemical) are dissolved in a tetrahydrofuran solvent to obtain a gravure. It coats so that it may become a film thickness of 1 micrometer on a 25-micrometer-thick polyethylene terephthalate film with a coater. At this time, the temperature of the drying furnace is set to 120 ° C. Subsequently, as a transfer foil adhesive, a methyl ethyl ketone / toluene mixed solution of vinyl chloride resin (Solvine A manufactured by Nissin Chemical) is overcoated with a dry film thickness of about 1 μm to prepare a protective layer transfer foil film. Subsequently, the protective layer transfer foil film and the magnetic card are pressure-bonded at 120 ° C. for 10 minutes, and then the polyethylene terephthalate film is peeled to obtain a card having a melamine-based protective layer.

  As described above, when the scratch-resistant protective layer is made of silicone or fluorine-containing resin, water repellency and oil repellency are improved, antifouling property is increased, and wear resistance is improved by improving slipperiness. Will also do. On the other hand, in silicone or fluorine-containing resins, image printing suitability and hologram suitability are inferior, but as anchor agents, mainly resin systems with good adhesion, such as urethane and vinyl resins, which have excellent compatibility with hologram foil and image printing. By applying a silicone or fluororesin component having a low surface tension for the purpose of improving the wettability between the card and the adhesive anchor layer as a component, adhesion to the scratch-resistant protective layer becomes possible. Urethane resin refers to polyester urethane, acrylic urethane, or polyols such as acrylic polyol and polyester polyol cured with an isocyanate curing agent. Vinyl resin refers to polyvinyl chloride resin, vinyl acetate resin, chloride chloride. This refers to vinyl copolymer such as vinyl / vinyl acetate resin and polyvinyl butyral resin. In order for the anchor layer and the scratch-resistant protective layer to adhere to each other, it is important that the two layers are slightly mixed. In the coating method, a solvent that slightly impairs the scratch-resistant protective layer may be selected. Few solvents can attack the resin. Therefore, it is better to slightly heat-scratch the scratch-resistant protective layer and make it adhere to the anchor layer.

  The adhesive anchor layer can be formed on the film substrate by gravure, microgravure, or spraying rather than by direct application by offset or silk printing to improve hologram foil and image printability. It is more efficient in terms of production speed to produce an anchor layer transfer foil and perform partial heat transfer to a required location, and the card manufacturing process can be easily automated.

  Specifically, 70 parts of ethyl acetate-ethylene copolymer resin (manufactured by Sumitomo Chemical Co., Ltd., trade name “Evatate D3022”) and 30 parts of silicon acrylic polyol (trade name “8BS-1005N” produced by Taisei Fine Chemical Co., Ltd.) A butyl acetate mixed solution is formed on a polyethylene terephthalate film (trade name “E5007”, manufactured by Toyobo Co., Ltd., 25 μm thickness) by a gravure method to a thickness of 1 μm when dried, and is formed at 120 ° C. on a card having a scratch-resistant protective layer. It can be formed by pressing under pressure and peeling the polyethylene terephthalate film. In some cases, a release film can be used to lighten the release from the polyethylene terephthalate film. Similarly, as an adhesive anchor layer resin, for example, acrylic urethane (trade name “8UA-308” manufactured by Taisei Fine Chemical Co., Ltd.) instead of ethylene-vinyl acetate copolymer resin has an effect of improving the suitability of hologram foil and image printing. .

It is sectional drawing which shows an example of the information recording medium of this invention. It is sectional drawing which shows an example of the adhesive anchor layer transfer foil film in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base base material 2 ... Oversheet 3 ... Pattern printing layer 4 ... Scratch-proof and antifouling protective layer 5 ... Adhesive anchor layer 6 ... Hologram foil or image printing layer 7 ... Magnetic tape 8 ... Adhesive anchor layer 9 ... Release layer 10 ... Base film

Claims (5)

In an information recording medium that requires transfer foil or image printing consisting of a hologram or a diffraction grating pattern,
An information recording medium comprising an adhesive anchor layer in at least the transfer foil or the image printing area on the outermost surface of the information recording medium.   2. The information recording medium according to claim 1, wherein an outermost surface of the information recording body is composed of a scratch-resistant protective layer.   The information recording medium according to claim 2, wherein the scratch-resistant protective layer is made of a silicone resin or a fluorine-containing resin.   4. The information recording medium according to claim 1, wherein the adhesive anchor layer is made of a urethane resin or a vinyl resin containing a resin component contained in the scratch-resistant protective layer. 5.   The information recording medium according to claim 1, wherein the adhesive anchor layer is formed by hot melt transfer.

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