JP2006263946A - Fluorescent pattern forming method, article having fluorescent pattern, laminate, magnetic recording medium and transfer laminate for forming fluorescent pattern - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluorescent pattern forming method capable of forming a fluorescent pattern which can not be visually confirmed under usual light such as solar rays or indoor light but can be discriminated by the irradiation with ultraviolet rays due to an ultraviolet irradiator and can be used for inspecting the printing quality of the fluorescent pattern when this fluorescent pattern is formed by the same inspection method as general printed matter under usual light. <P>SOLUTION: A fluorescent pattern forming layer containing a fluorescent dye and a color pigment and an opaque layer for concealing the fluorescent pattern forming layer are formed from the side near to a material to be recorded on which the fluorescent pattern is formed and only the fluorescent dye in the fluorescent pattern forming layer is diffused into the opaque layer or through the opaque layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for forming a fluorescent pattern recognized by irradiating the surface of a recording material with ultraviolet rays, and a laminate formed by the method for forming the fluorescent pattern. About. The present invention also relates to a transfer laminate for forming a fluorescent pattern used in the method for forming the fluorescent pattern. Above all, the recording material is a base material for a magnetic recording medium, particularly a magnetic card such as a credit card, a method for forming a fluorescent pattern on the surface thereof, a magnetic card having a fluorescent pattern, and a fluorescent pattern The present invention relates to a transfer laminate for producing a magnetic card.

Forming a fluorescent pattern on a recording material using an ink containing a fluorescent agent is widely performed. The fluorescent pattern created in this way causes fluorescent emission due to ultraviolet rays contained in sunlight or room light, and imparts high designability to the article, which is different from the pattern formed using ordinary ink. be able to.
Among such fluorescent patterns, the presence of ordinary ultraviolet rays or ultraviolet rays contained in room light cannot be recognized, and fluorescence is only achieved by using a dedicated ultraviolet irradiation device with high ultraviolet intensity. A fluorescent pattern capable of recognizing luminescence is used as hidden printing to authenticate authentic products and prevent fraud. In particular, in a magnetic card such as a credit card in which security is regarded as important, such a technique for forming a fluorescent pattern is important and has been used.

In order to give a fluorescent pattern to a magnetic card, it is necessary to produce a fluorescent pattern forming layer, which is a printing region containing a fluorescent agent, in a part of the constituent parts of the magnetic card.
As such a magnetic card, a method of providing a fluorescent picture layer between a magnetic recording layer and a concealing layer that conceals the hue of the magnetic recording layer is disclosed. (See Patent Document 1).
In addition, a transfer layer is formed by sequentially forming a release layer, an overcoat layer, a pattern printing layer, a concealing layer, and a fluorescent pattern layer on the transfer substrate, and then a layer from the overcoat layer to the fluorescent pattern layer. A method of forming a magnetic card in which a configured transfer material is transferred onto a card substrate on which a magnetic recording layer is formed in advance, and a magnetic card manufactured by the manufacturing method are disclosed (see Patent Document 2).
Further, a method is disclosed in which a first concealing layer, a fluorescent ink printing layer, a second concealing layer, a process ink printing layer, and a surface protective layer are sequentially formed on a card substrate on which a magnetic recording layer is previously formed (patent) Reference 3).

  In the magnetic card described above, in order to avoid recognizing the existence of the fluorescent pattern forming layer when not irradiated with ultraviolet rays, the fluorescent pattern is formed on the upper side of the fluorescent pattern forming layer, that is, on the side closer to the card surface than the fluorescent pattern forming layer. A concealing layer is provided to conceal the presence of the forming layer. However, this concealing layer is designed so that the ultraviolet light irradiated from the surface side of the card reaches the fluorescent agent contained in the fluorescent pattern forming layer, and the fluorescent light emitted from the fluorescent agent contained in the fluorescent pattern forming layer is emitted from the magnetic card. It must be provided so as to be emitted from the surface, and cannot be provided so as to completely block ultraviolet rays and visible rays. Therefore, the presence of the fluorescent pattern forming layer cannot be completely masked only by the masking layer, and the fluorescent pattern forming layer itself needs to have a color that is difficult to recognize under ordinary light, that is, a transparent or very light color. there were.

  On the other hand, in the case of general printed matter, print quality inspection and guarantee by a defect inspection machine are universally performed, and the same print quality inspection and guarantee are required for the above-described fluorescent pattern. . Currently, a defect inspection machine generally used is composed of a light source portion for irradiating a printed material and a portion for recognizing the printing state of the printed material, and the print quality is inspected by image recognition. In the case of a general printed matter, the printed region is colored and has a high contrast with the background, so that it is easy to recognize the image. Therefore, it is possible to inspect and guarantee the print quality with high accuracy. However, in the case of the above-described fluorescent pattern, as described above, it is necessary to make the color transparent or very light in order to ensure invisibility under ordinary light rays.

For this reason, the contrast between the fluorescent pattern and the background could not be ensured, and the image could not be recognized. Therefore, it was impossible to inspect the print quality by a normal method. In addition, in order to improve the contrast between the fluorescent pattern forming region and the background, a method has been considered in which a fluorescent pattern is fluorescently emitted using an ultraviolet lamp as an inspection light source, and an image is recognized using the light emission state. However, even in this case, the amount of fluorescent light emitted from the fluorescent pattern is very low compared to the case of general printed matter inspection, and the image can be recognized with the same clarity as a normal image. It was difficult to inspect the quality.
Japanese Utility Model Publication No. 3-40615 JP-A-9-309287 Japanese Patent Laid-Open No. 2002-2160

The purpose of the present invention is to produce a fluorescent pattern that is not visible under normal light such as sunlight or room light, and that can be identified by ultraviolet irradiation by an ultraviolet irradiation device, and when the fluorescent pattern is formed, the print quality is improved. It is an object of the present invention to provide a method for forming a fluorescent picture that can be inspected by an inspection method similar to that for general printed materials under ordinary light.
Furthermore, the objective of this invention is providing the articles | goods, laminated body, and magnetic recording medium in which the fluorescent pattern was formed by the said method.
Furthermore, the objective of this invention is providing the laminated body for transcription | transfer used when forming a fluorescent pattern by the said method.

The present invention is a method of forming a fluorescent pattern that can be identified by irradiation with ultraviolet light on a recording material, from the side close to the recording material, a fluorescent pattern forming layer containing a fluorescent dye and a coloring pigment, And forming an opaque layer for concealing the fluorescent pattern forming layer, and diffusing only the fluorescent dye of the fluorescent pattern forming layer into the opaque layer or through the opaque layer. I will provide a. Furthermore, this invention provides the laminated body which has the fluorescent pattern produced by the said fluorescent pattern formation method. Furthermore, this invention provides the articles | goods which have the fluorescent pattern produced by the said fluorescent pattern formation method.
Furthermore, the present invention provides a transfer laminate for forming a fluorescent pattern, in which an opaque layer and a fluorescent pattern forming layer containing a fluorescent dye and a color pigment are stacked in this order on a transfer substrate.
In particular, in a magnetic recording medium such as a magnetic card having a magnetic recording layer, a fluorescent pattern is formed that includes a magnetic recording layer as an opaque layer, and a color pigment and a fluorescent dye on the lower side of the magnetic recording layer A fluorescent pattern is formed by diffusing only the fluorescent dye of the fluorescent pattern forming layer through the magnetic recording layer in a direction close to the surface of the magnetic recording medium. Fluorescent pattern forming method, magnetic recording medium having a fluorescent pattern created by the fluorescent pattern forming method, and a transfer laminate such as a magnetic stripe transfer laminate that can be used for manufacturing the magnetic recording medium having the fluorescent pattern. provide.

  Since the fluorescent pattern forming layer of the present invention contains the same colored pigment as that used in general printing inks and is colored with the pigment, the handling immediately after providing the fluorescent pattern forming layer is: It is not different from general printed matter. Therefore, by using the same inspection method and inspection apparatus as those for general printed matter, it is possible to inspect the print quality with high accuracy. (Guaranteed print quality)

  In the fluorescent pattern forming method of the present invention, the fluorescent dye contained in the fluorescent pattern forming layer is heated to pass through the opaque layer that hides the presence of the fluorescent pattern forming layer or through the opaque layer. Spread in the direction. Therefore, the fluorescent dye diffused by heating exists over the entire thickness direction of the opaque layer and reaches the surface layer of the opaque layer. The fluorescent dye that has reached the vicinity of the surface layer can emit fluorescence when irradiated with ultraviolet rays, and the fluorescence emitted from the vicinity of the surface of the opaque layer can be recognized from the surface of the article, laminate, or magnetic recording medium. Is possible. (Securing fluorescence emission)

  On the other hand, in articles, laminates, and magnetic recording media in which a fluorescent pattern is produced by the method of the present invention, the fluorescent pattern forming layer is located below the opaque layer, so that it is under ordinary light such as sunlight or room light. The shape, color, etc. of the fluorescent picture forming layer are not recognized through the opaque layer, and the presence of the fluorescent picture forming layer is completely hidden. Here, the opaque layer in the present invention refers to a layer that has a low light transmittance in the visible light region and it is very difficult to recognize the hue or shape of the layer existing on the opposite side through the layer.

  In addition, in the heating performed for the diffusion of the fluorescent dye, the colored pigment contained in the fluorescent pattern forming layer does not cause the diffusion due to the heating unlike the fluorescent dye, and the color of the colored pigment is hidden by the opaque layer. Subsequently, it is not recognized from the surface of the article, the laminate, or the magnetic recording medium. Therefore, the invisibility of the fluorescent pattern forming layer from the opaque layer side under ordinary light is ensured. (Securing invisibility)

As described above, according to the method for forming a fluorescent pattern of the present invention, “invisibility” in which the presence of the fluorescent pattern forming layer is not recognized under a normal light beam and the printed state of the fluorescent pattern can be inspected at a high level. It is possible to simultaneously achieve “guarantee of print quality” and “fluorescence luminescence” in which the fluorescent pattern reliably emits light when irradiated with ultraviolet rays.
Further, assuming a magnetic card, the fluorescent pattern forming layer is disposed below the magnetic recording layer, so that no fluctuation occurs in the recording / reproducing output as the magnetic card.

The present invention is described in detail below.
In order to produce a fluorescent pattern on a recording material using the fluorescent pattern forming method of the present invention, a fluorescent pattern forming layer, for example, a fluorescent ink containing a fluorescent dye and a coloring pigment is printed on the recording material. Followed by an opaque layer that completely covers this fluorescent patterning layer, followed by diffusion of the fluorescent dye into or through the opaque layer by heating.

  For example, when producing a magnetic recording medium on which a fluorescent pattern is formed, after providing a fluorescent pattern forming layer on a substrate, a magnetic recording layer that is an opaque layer so as to cover the entire surface, and other layers as necessary A magnetic recording medium having a fluorescent pattern can be produced by providing a layer having a function and then diffusing the fluorescent dye by heating. In this case, the presence of the fluorescent pattern forming layer located below the magnetic recording layer is completely hidden by the opaque magnetic recording layer and cannot be recognized under ordinary light. In the case of the present invention, when the fluorescent pattern forming layer is provided or immediately after that, it is possible to inspect the print quality using a defect inspection machine, thereby assuring the print quality of the fluorescent pattern. Is possible. The diffusion of the fluorescent dye need not be anisotropic diffusion only in the direction of the opaque layer, and may be isotropic diffusion including diffusion in the direction of the recording material.

  In addition, the fluorescent pattern forming method of the present invention is a method for producing a transfer laminate in which an opaque layer is provided on a transfer substrate, and using the transfer laminate, the fluorescent pattern forming layer is previously provided on the transferred substrate. This can be done by transferring the opaque layer and then diffusing the fluorescent dye into the opaque layer by heating. For example, when producing a magnetic recording medium having a fluorescent pattern formed thereon, a transfer laminate comprising a magnetic recording layer, which is an opaque layer, and other functional layers as necessary is provided on a transfer substrate. Make it. Next, a fluorescent pattern forming layer is provided on the recording material, and a transfer material including a magnetic recording layer is transferred onto the recording material so as to cover the fluorescent pattern forming layer using the transfer laminate. Thereafter, the fluorescent dye is diffused into or through the magnetic recording layer by heating, whereby a magnetic recording medium having a fluorescent pattern can be produced. As described above, the print quality of the fluorescent pattern can be guaranteed even in this case. Further, the fluorescent pattern forming layer itself may be formed by a transfer process. Here, the transfer means that a transfer laminate in which a transfer material is provided on a transfer substrate and a recording material are superposed and bonded so that the transfer material is in contact with the recording material, and then the transfer substrate is transferred. The process of removing the material and leaving only the transfer material on the recording material.

  Furthermore, in the method for forming a fluorescent pattern of the present invention, an opaque layer and a fluorescent pattern forming layer are produced in this order on a transfer substrate, and the opaque layer and the fluorescent pattern forming layer are formed on the transferred substrate using this. Can be transferred, followed by diffusion of the fluorescent dye into the opaque layer by heating. When the transfer process is used, the order in which the transfer materials are laminated in the transfer laminate and the order in which the transfer materials are laminated in the laminate after transfer are reversed. Therefore, it is necessary to provide the opaque layer first in the transfer laminate. . For example, when a magnetic card having a fluorescent pattern is produced using a transfer laminate having a stripe-shaped magnetic recording layer, a magnetic recording layer which is an opaque layer on the transfer substrate and other functional layers as required A transfer material is provided. Next, a fluorescent pattern forming layer is further provided on the transfer material to produce a transfer laminate having a fluorescent pattern forming function. The transfer laminate is preliminarily cut to the width of the magnetic recording layer for the magnetic card to form a magnetic stripe transfer laminate. By using this, a transfer material with a fluorescent pattern forming function can be transferred onto a recording material to produce a magnetic recording medium having a fluorescent pattern. In this case, the heating for diffusing the fluorescent dye into the magnetic recording layer, which is an opaque layer, may be performed in the state of the transfer laminate before transfer, or in the state of the magnetic recording medium after transfer. Also good. As described above, in any case, the print quality of the fluorescent pattern forming layer can be assured by using an image visualized by a color pigment.

The design of the fluorescent pattern may be changed frequently in order to improve the effect of preventing forgery. For this reason, it is preferable that the step of forming the fluorescent pattern forming layer is at the final part of the step of forming the fluorescent pattern as much as possible, and the method of forming the stacked body using the above-described transfer laminate is preferable. For example, when forming a fluorescent pattern on the magnetic stripe part of a magnetic card, the fluorescent pattern forming layer is on the heat-sensitive adhesive layer, which is the uppermost layer of the magnetic stripe transfer laminate, or on the card sheet to which the magnetic stripe is transferred. It is preferably formed in advance. In this case, a magnetic stripe transfer laminate without a fluorescent pattern forming layer can be prepared in advance, and as soon as the design of the fluorescent pattern is determined, fluorescent pattern printing is performed on the magnetic stripe transfer laminate or the substrate to be transferred. By adopting a method for providing a fluorescent pattern forming layer, it is possible to manufacture a magnetic card having a magnetic stripe portion with a fluorescent pattern with a short delivery time from receiving an order.
Prior to diffusing the fluorescent dye into or through the opaque layer, a fluorescent dye diffusion preventing layer can be formed on the opposite side of the opaque layer from the fluorescent patterning layer. By providing such a layer, it is possible to prevent the fluorescent dye diffused to the surface of the opaque layer from being attached and dissipated during and after the manufacturing process.
Furthermore, when forming a fluorescent pattern on a magnetic recording medium, in addition to the magnetic recording layer as an opaque layer, a colored layer is added as a part of the opaque layer on the side opposite to the fluorescent pattern forming layer on the magnetic recording layer. By doing so, the hue of the magnetic recording layer can be concealed, the visibility of the fluorescent pattern can be improved, and the design can be improved.

As one embodiment of the fluorescent pattern forming method of the present invention, a method for manufacturing a magnetic card on which a fluorescent pattern is formed by a transfer process will be described in further detail.
First, a magnetic stripe transfer laminate having a fluorescent pattern forming layer is prepared, and a method of manufacturing a magnetic card having a fluorescent pattern using the laminate is shown in FIG. This will be described in detail with reference to FIG. FIG. 1 is a cross-sectional view of a magnetic stripe transfer laminate having a fluorescent pattern forming layer, and FIG. 7 is a flow of manufacturing a magnetic stripe transfer laminate having a fluorescent pattern forming layer, and using the magnetic stripe transfer laminate. This is the flow of magnetic card manufacturing. In FIG. 7, the case where a fluorescent pattern forming layer is provided as the uppermost layer on the heat-sensitive adhesive layer of the magnetic stripe transfer laminate is shown. In the present invention, as shown in FIG. 1, a fluorescent dye diffusion preventing layer 1, a colored layer 3, a magnetic recording layer 4, and a heat-sensitive adhesive layer 5 are sequentially applied and laminated on a transfer substrate 9.

  Thereafter, as soon as the fluorescent pattern to be provided on the magnetic stripe portion is determined, the fluorescent pattern is formed on the heat-sensitive adhesive layer to form the fluorescent pattern forming layer 10 to produce a transfer laminate having a fluorescent pattern forming function. This fluorescent pattern forming layer contains a coloring pigment and is colored so as to have a dark color and a high contrast of the magnetic recording layer as a background. Therefore, it is possible to inspect and guarantee the print quality by a commonly used defect inspection machine. The laminate for transfer having a fluorescent pattern forming function with a guaranteed print quality is cut into a predetermined width to produce a laminate for magnetic stripe transfer. The print quality inspection can also be performed after the magnetic stripe transfer laminate is manufactured. The produced laminate for magnetic stripe transfer is bonded to the card oversheet as a transfer substrate by heat and pressure, the transfer substrate 9 is peeled off, and the magnetic stripe portion is transferred onto the card oversheet.

  The oversheet with magnetic stripe obtained in this way is overlaid with the center core for the card and the oversheet on the opposite side, and hot-pressing (FIG. 7- (2)) is performed. Integrate the sheets. In FIG. 4, an oversheet on the opposite side (not shown) is thermocompression bonded to the lower side of the card center core 7. In this hot-pressing process, the fluorescent dye contained in the fluorescent pattern forming layer diffuses through the magnetic recording layer and the colored layer toward the surface of the transfer material after transfer, and the fluorescent pattern is irradiated with ultraviolet rays from the surface of the magnetic stripe. Can be identified. Further, the fluorescent dye of the fluorescent pattern forming layer can also be diffused in the direction of the transfer substrate by heating in the state of the magnetic stripe transfer laminate before the hot-pressing step (FIG. 7- (1)). By this heating, the fluorescent pattern can be identified by ultraviolet irradiation from the surface of the transfer material transferred to the card oversheet. (Refer to FIG. 2) Thus, it is preferable to perform the heating step (FIG. 7- (1)) in the state of the magnetic stripe transfer laminate because the fluorescent dye can be more reliably diffused.

Next, as another embodiment of the present invention, FIG. 3 is a process diagram for forming a fluorescent pattern forming layer on a portion where a magnetic stripe of a card oversheet is transferred, FIG. This will be described in detail with reference to FIG.
This method is the same as the method shown in FIG. 7 up to the stage of preparing a magnetic stripe transfer laminate without a fluorescent pattern forming layer in advance. After that, as soon as the fluorescent pattern to be provided on the magnetic stripe portion is determined, the fluorescent pattern is formed on the portion of the card oversheet, which is the transfer substrate, to which the magnetic stripe is transferred, thereby forming the fluorescent pattern forming layer 10. Create a functional card oversheet. This fluorescent pattern forming layer contains a coloring pigment and is colored so as to have a high contrast with a background of a substantially transparent card oversheet as a background. Therefore, it is possible to inspect and guarantee the print quality by a commonly used defect inspection machine. After the magnetic stripe is transferred onto the card oversheet having a fluorescent pattern forming function that guarantees the print quality, it is superposed on the card center core and the oversheet on the opposite side to be hot-pressed (FIG. 8- (2) ) To integrate the card sheet. In this hot-pressing process, the fluorescent dye contained in the fluorescent pattern forming layer diffuses through the magnetic recording layer and the colored layer toward the surface of the transfer material after transfer, and the fluorescent pattern is irradiated with ultraviolet rays from the magnetic stripe surface. Can be identified.

  FIG. 4 shows a cross-sectional view of the magnetic card manufactured through the above processes. The magnetic stripe transfer material including the magnetic recording layer is embedded in the card oversheet 6 by a hot press process. In addition, the fluorescent dye contained in the fluorescent pattern forming layer diffuses into the magnetic stripe transfer material and exists throughout the thickness direction of the colored layer 3, the magnetic recording layer 4, and the heat-sensitive adhesive layer 5. Therefore, the ultraviolet light irradiated from the card surface and the fluorescent light emission generated from the fluorescent dye by the ultraviolet light are not completely shielded by the presence of the colored layer 3 and the magnetic recording layer 4, and the fluorescent pattern emits light in an identifiable manner. It is in a state. On the other hand, the colored pigment contained in the fluorescent pattern forming layer does not cause diffusion like the fluorescent dye, and remains in the fluorescent pattern forming layer, so that its presence is completely concealed by an opaque magnetic recording layer, etc. It is not recognized from the surface.

  A magnetic card having a fluorescent pattern on the magnetic stripe portion can be formed by the procedure as described above. However, the fluorescent pattern forming method of the present invention can be applied to a place other than the magnetic stripe and also to a magnetic recording medium other than the magnetic card. Alternatively, it can be applied to the manufacture of a laminate having no magnetic recording layer. The fluorescent pattern forming method in such a case can be dealt with by omitting the magnetic recording layer in the process diagrams of FIGS. 7 and 8, adding another layer, or replacing the magnetic recording layer with another functional layer. Can do. Further, the magnetic stripe transfer laminate only covers a part of the card base material, but a transfer laminate that covers the entire base material may be used.

  In the fluorescent picture forming method of the present invention, the fluorescent dye of the fluorescent picture forming layer is diffused in the surface of the opaque layer or through the opaque layer to form a fluorescent picture that can be identified by ultraviolet irradiation from the surface. To do. Therefore, a region where the fluorescent dye is diffused and held above the fluorescent pattern forming layer is required. The upper layer of the fluorescent pattern forming layer including the opaque layer forms the region. However, if the thickness of the region is too thin, the absolute amount of the fluorescent dye present in the region is insufficient, and the fluorescent pattern is sufficiently formed. Can not do. Further, the fluorescent dye is diffused in the lateral direction, and the fluorescent pattern tends to become unclear. On the other hand, if the thickness of the region is too thick, the diffusion region of the fluorescent dye is too wide and the fluorescent pattern tends to be unclear. Therefore, the total thickness of the constituent layers located above the fluorescent pattern forming layer is preferably about 2 to 50 μm, more preferably about 3 to 20 μm, excluding the thickness of the layer that prevents the diffusion of the fluorescent dye.

In the following, each component of the transfer laminate of the present invention will be described in more detail step by step, taking a magnetic card as an example.
A cross-sectional view of FIG. 1 shows one embodiment of a magnetic stripe transfer laminate used for forming a magnetic stripe having a fluorescent pattern on a magnetic card using the fluorescent pattern forming method of the present invention. 1, the transfer substrate 9, the fluorescent dye diffusion prevention layer 1 formed as necessary, the colored layer 3 formed as necessary, the magnetic recording layer 4, and formed as necessary. A heat-sensitive adhesive layer 5 is provided.

  Any known and commonly used film can be used as the transfer substrate used in the present invention. Examples thereof include polyesters such as polyethylene terephthalate, polyolefins such as polypropylene, cellulose derivatives such as cellulose triacetate, and plastics such as polyamide. Of these, polyethylene terephthalate having both tensile strength and heat resistance is preferred. The thickness of the transfer substrate is not particularly limited, but is usually 3 to 100 μm, preferably 5 to 50 μm.

The transfer laminate of the present invention can be provided with a fluorescent dye diffusion preventing layer. The fluorescent dye diffusion preventing layer prevents the fluorescent dye diffused through the transfer material by heat from diffusing outside the magnetic card. That is, in a heating process such as a hot pressing process for a magnetic card, the fluorescent dye is prevented from leaking out beyond the fluorescent dye diffusion preventing layer and adhering to the metal plate for hot pressing. Further, the fluorescent dye diffusion preventing layer is the outermost layer in the magnetic card, and also serves as a surface protecting role for protecting the magnetic recording layer from damage by the magnetic head.
In order to effectively prevent the leakage of fluorescent dye, the fluorescent dye diffusion prevention layer has a glass transition point higher than the heating temperature and thermal transfer temperature of the magnetic stripe transfer laminate during the diffusion of the fluorescent dye, and the hot press temperature of the magnetic card. It needs to be a thing.
The fluorescent dye diffusion preventing layer preferably has a property that is substantially transparent at the wavelengths of ultraviolet rays and visible rays so that a pattern of the fluorescent dye diffused to just below can be easily identified by ultraviolet irradiation.
The fluorescent dye diffusion prevention layer is mainly composed of a binder resin, for example, a cellulose resin, a butyral resin, an acrylic resin, a polyurethane resin, a polyester resin, a copolymer of vinyl chloride and vinyl acetate, or further vinyl alcohol, anhydrous Mention may be made of vinyl chloride copolymer resins, epoxy resins, phenol resins, melamine resins to which maleic acid, acrylic acid or the like is added. Further, these resins may be mixed and used.

Examples of the solvent used in the coating for the fluorescent dye diffusion prevention layer include ketones such as acetone, methyl ethyl ketone, and cyclohexanone, esters such as methyl acetate, ethyl acetate, and butyl acetate, alcohols such as ethanol, hexane, toluene, xylene, and the like. These hydrocarbons can be mentioned, and these solvents can also be mixed and used.
In the fluorescent dye diffusion prevention layer, additives such as soybean lecithin, microsilica, and wax can be added as necessary to improve card press suitability and to improve card durability. . Moreover, it is preferable to add a curing agent such as a polyisocyanate compound to crosslink the binder resin molecules in order to improve the durability of the fluorescent dye diffusion preventing layer.
The fluorescent dye diffusion prevention layer is obtained by applying a fluorescent dye diffusion prevention layer coating composed of the above-mentioned materials onto a transfer substrate by a known and usual method such as a reverse method, a gravure method, a micro gravure method, or a die coating method. It is done.
The dry coating thickness of the fluorescent dye diffusion prevention layer is preferably as thin as possible from the recording / reproduction characteristics. However, in consideration of the balance with the fluorescent dye diffusion prevention function, the durability of the magnetic stripe, etc., 0.1 to 5 μm is preferable. 0.3-2 μm is more preferable.

  The opaque layer in the fluorescent pattern forming method and transfer laminate of the present invention has a function of visually hiding the presence of the fluorescent pattern forming layer under ordinary light rays such as sunlight and room light, and the fluorescent pattern is formed by heating. The fluorescent dye is diffused from the layer, and functions as an opaque diffusion layer that holds the fluorescent dye so that it can emit light by irradiation with an ultraviolet irradiation device. The opaque layer may be formed by dispersing various fillers such as color pigments and magnetic powder in the binder resin as long as it has a concealing property in the visible region to the extent that the presence of the fluorescent pattern forming layer is not known. Are preferably used. In addition, as long as it has the above-described opacity and allowance for diffusion, a layer originally formed to perform other functions, such as a magnetic recording layer described later, can be used as an opaque layer. . In order to facilitate the diffusion of the fluorescent dye, the glass transition temperature of the binder resin used for the opaque layer is preferably lower than the temperature applied for the diffusion of the fluorescent dye.

A colored layer can be provided as the opaque layer of the present invention or as a part of the opaque layer. The colored layer is a layer provided to conceal the hue of the magnetic recording layer and color the magnetic stripe in the magnetic stripe transfer laminate. In the case of a magnetic stripe having a fluorescent pattern, the colored layer serves as a background for recognizing the fluorescent pattern. Therefore, the provision of the colored layer has the effect of facilitating identification of the fluorescent pattern and improving the design.
The colored layer contains a binder resin and a colorant. Examples of the colorant used in the colored layer include inorganic pigments such as alumina, titanium oxide, chromium oxide, iron oxide, zinc oxide, and barium sulfate. Organic pigments include azo, phthalocyanine, quinacridone, perylene, anthraquinone, thioindigo, and indanthrene, and organic dyes include phthalocyanine dye, azo dye, nitro dye, quinoline dye, methine dye, Examples thereof include, but are not limited to, azine dyes and fatalein dyes. For stable coloring, it is preferable to use an inorganic pigment or an organic pigment.
In order to effectively conceal the hue of the magnetic recording layer, flake metal powder can also be used. Examples of metals include aluminum, gold, silver, copper, brass, titanium, chromium, nickel, nickel chrome, stainless steel, etc. Can be mentioned. The flake metal powder is adjusted to a plate shape by a ball mill or the like, and the size in the plane direction of these shapes is preferably 5 to 25 μm, more preferably 10 to 15 μm. The thickness is about 0.1 to 1 μm.

As the binder resin used for the colored layer, known and commonly used binder resins can be used. For example, in addition to the binder resin described in the fluorescent dye diffusion prevention layer, polyimide resin, polyamide resin, rosin-modified maleic acid resin, polystyrene resin, shellac resin, alkyd resin, and the like can be given. It can also be thermally cured using an isocyanate compound. In order to facilitate the diffusion of the fluorescent dye, the glass transition temperature of the binder resin used for the colored layer is preferably lower than the temperature applied for the diffusion of the fluorescent dye.
As the solvent used for the coating material for the colored layer, known and commonly used solvents can be used. For example, the solvents already described in the fluorescent dye diffusion preventing layer can be used.
The colored layer is prepared by mixing a coloring agent in a binder resin and a solvent for dissolving the binder resin, and dispersing the mixture by a known and usual method such as a two-roll mill, a three-roll mill, a ball mill, a sand mill, or a disper. It can be provided by preparing a coating material for coating, and applying and drying the coating material by a known method such as a reverse method, a gravure method, a micro gravure method, and a die coating method.
The thickness of the colored layer is preferably thick in order to conceal the hue of the magnetic recording layer. However, since the colored layer is positioned closer to the surface of the card than the magnetic recording layer when the card is formed, if the film thickness is too large, the spacing between the magnetic head and the magnetic recording layer increases. As a result, the reproduction output characteristic is lowered, and the possibility of occurrence of an error at the time of reading information is increased. Therefore, the thickness of the colored layer is preferably 2 to 5 μm, particularly 3 to 4 μm.

In order to produce a fluorescent pattern that can be identified from above the magnetic recording layer, the magnetic recording layer can be used as the opaque layer of the present invention or as a part of the opaque layer. The magnetic recording layer contains, for example, magnetic powder and a binder resin.
As the magnetic powder contained in the magnetic recording layer, known magnetic powders such as γ-iron oxide, magnetite, cobalt-coated iron oxide, chromium dioxide, iron-based metal magnetic powder, barium ferrite, and strontium ferrite can be used. . The coercive force is preferably in the range of 20 to 320 kA / m.
As the binder resin used for the magnetic recording layer, known and commonly used binder resins can be used. For example, the binder resin described for the colored layer can be used. It can also be thermally cured using an isocyanate compound. In order to facilitate the diffusion of the fluorescent dye, the glass transition temperature of the binder resin used for the magnetic recording layer is preferably lower than the temperature applied for the diffusion of the fluorescent dye.
Moreover, as a solvent used for the coating material for magnetic recording layers, for example, the solvents described in the fluorescent dye diffusion preventing layer can be used.
If necessary, auxiliary agents such as surfactants, silane coupling agents, plasticizers, waxes, silicone oils, carbon black and other fillers may be added to the magnetic recording layer coating material.

The magnetic recording layer coating material can be obtained, for example, by kneading and dispersing the magnetic powder, the binder resin, and the solvent by a known and usual method. As the kneading and dispersing machine, for example, a two-roll mill, a three-roll mill, a ball mill, a Henschel mixer, a cobol mill, a sand mill, a disper, a homogenizer, a kneader, or the like can be used.
There are no particular restrictions on the method of applying the magnetic recording layer coating material, and any known and commonly used application method can be used. As a coating method for the magnetic recording layer coating, for example, a reverse method, a gravure method, a micro gravure method, a die coater method, or the like can be used.
In addition, it is preferable from the viewpoint of recording / reproducing characteristics that after applying the coating material for the magnetic recording layer by the above coating method, the magnetic field orientation treatment is performed before the coating film is dried. As a magnetic field orientation processing method, a known method such as a repulsive counter permanent magnet, a solenoid type electromagnet, or the like can be used. The magnetic field strength is preferably in the range of 1000 to 6000G.
The dry film thickness of the magnetic recording layer is preferably in the range of 2 to 50 μm, more preferably in the range of 5 to 20 μm.

In the transfer laminate of the present invention, a heat-sensitive adhesive layer can be provided for the purpose of bonding the transfer material and the card oversheet which is the transfer substrate. The heat-sensitive adhesive layer is mainly composed of a binder resin exhibiting heat-sensitive adhesiveness.
Examples of the binder resin exhibiting heat-sensitive adhesive properties include, for example, a copolymer of vinyl chloride and vinyl acetate, a vinyl chloride copolymer resin added with vinyl alcohol, maleic anhydride or acrylic acid, a polyester resin, an acrylic resin, and the like. Examples thereof include a resin, a polyimide resin, and a polyurethane resin. In order to facilitate the diffusion of the fluorescent dye, the glass transition temperature of the binder resin used for the heat-sensitive adhesive layer is preferably lower than the temperature applied for the diffusion of the fluorescent dye.
As the solvent used for the heat-sensitive adhesive paint, for example, the solvents described in the fluorescent dye diffusion preventing layer can be used.
These binder resins are mixed with a solvent and dissolved to prepare a heat-sensitive adhesive paint, and this heat-sensitive adhesive paint is applied to the magnetic recording layer by a reverse method, a gravure method, a micro gravure method, a die coating method, etc. A heat-sensitive adhesive layer can be obtained by applying and drying in the above manner.
The thickness of the heat-sensitive adhesive layer is preferably 0.5 to 15 μm, particularly preferably 0.5 to 5 μm.

The fluorescent pattern forming layer in the transfer laminate of the present invention can be provided by printing the following fluorescent pattern forming ink.
The fluorescent pattern forming ink contains a binder resin, a coloring pigment, a fluorescent dye, and a solvent.
An organic fluorescent material can be used as the fluorescent dye of the fluorescent pattern forming ink. Specifically, fluorescent dyes such as benzoxazole thiophine, diaminostilbene, imidazole, coumarin, naphthalimide, and rare earth complex are used. Commercially available fluorescent substances include trade name UVITEX series manufactured by Chiba Special Chemicals, trade name Kayight series manufactured by Nippon Kayaku Co., Ltd., trade name Thermoplast series, trade name Fluorol series, trade name Lumogen, manufactured by BASF. Series, Rumi Color, a product name manufactured by Recording Materials Research Institute, Inc., a LUMILUX series, a product name manufactured by Honeywell, etc. can be used. Inorganic fluorescent materials do not cause diffusion due to heating, and thus are not suitable for use in the present invention. In addition, the fluorescent dye diffuses in the opaque layer or through the opaque layer and diffuses in the direction of the surface layer of the article. From the viewpoint of ensuring the invisibility of the fluorescent pattern, the fluorescent dye is exposed to sunlight or normal room light. And transparent or very light shades should be used.

  Color pigments used in fluorescent pattern forming inks include alumina, titanium oxide, chromium oxide, iron oxide, zinc oxide, barium sulfate, azo, phthalocyanine, quinacridone, perylene, anthraquinone, thioindigo, indanth For example, pigments of len and carbon black can be used. Also, flake metal powder can be used, and as the metal, aluminum, gold, silver, copper, brass, titanium, chromium, nickel, nickel chromium, stainless steel or the like can be used. When forming a fluorescent pattern on the magnetic stripe of a magnetic card, the fluorescent pattern forming layer is often inspected by a defect inspection machine with the dark shade of the magnetic recording layer as the background. Titanium oxide, zinc oxide, barium sulfate, and metal powder are preferable because they are bright and highly concealable. Further, when the fluorescent pattern forming layer is provided on the card oversheet, it is preferable to use carbon black because the card oversheet is substantially transparent.

As the binder resin used for the fluorescent pattern forming ink, known and commonly used binder resins can be used. For example, the binder resin described in the fluorescent dye diffusion prevention layer, the colored layer, the magnetic recording layer, and the heat-sensitive adhesive layer may be mentioned. The laminate for magnetic stripe transfer and the card oversheet as the substrate for transfer Binder resins that do not inhibit adhesiveness are preferred, and the binder resins described above for the heat-sensitive adhesive can be suitably used. When a binder resin with heat sensitive adhesive is used and the printing area of the fluorescent pattern is large, the magnetic stripe transfer laminate and the card oversheet can be bonded only by the fluorescent pattern forming layer. The agent layer can be omitted.
As the solvent used in the fluorescent pattern printing ink, known and commonly used solvents can be used. For example, the solvents already described in the fluorescent dye diffusion preventing layer, the colored layer, the magnetic recording layer, and the heat-sensitive adhesive layer can be used.

  Ink for fluorescent pattern printing is a known and commonly used method such as a two-roll mill, three-roll mill, ball mill, sand mill, or disper, in which a coloring pigment and a fluorescent dye are mixed in a binder resin and a solvent that dissolves the binder resin. It can be created by distributing with. Alternatively, a coloring pigment master batch may be prepared by dispersing only a coloring pigment in a binder resin and a solvent, and a fluorescent dye may be added and dissolved therein to prepare a fluorescent pattern printing ink. It is also possible to prepare a master batch by mixing and dissolving only a dye in a binder resin and a solvent, and adding a coloring pigment master batch to the ink to adjust the fluorescent pattern printing ink.

The fluorescent pattern printing layer can be provided by printing using a fluorescent pattern printing ink on, for example, a heat-sensitive adhesive layer of the laminate for magnetic stripe transfer, or on a portion of the card oversheet where the magnetic stripe is provided. For printing the fluorescent pattern, known printing methods such as gravure printing, flexographic printing, offset printing, screen printing, and ink jet can be used. In particular, gravure printing is suitable from the viewpoint of printing quality and productivity.
Since the fluorescent pattern forming layer is provided in the shape of the fluorescent pattern, it is generally a discontinuous layer. In addition, a plurality of fluorescent pattern printing inks can be used to form a multicolored fluorescent pattern, and in this case, a seemingly continuous layer can be formed by a technique such as tweezer printing.
When the fluorescent pattern forming layer is provided on, for example, a heat-sensitive adhesive layer of the magnetic stripe transfer laminate, the thickness of the fluorescent pattern forming layer is not particularly limited, but if the fluorescent pattern forming layer is too thick The difference in thickness between the printing area and the non-printing area is increased, and the possibility that the transfer laminate is deformed when the magnetic stripe transfer laminate is wound up in a reel shape increases. Since the deformation of the transfer laminate causes deterioration of the adhesiveness with the card oversheet as a transfer substrate, the film thickness of the fluorescent pattern printing region is preferably 0.5 to 5 μm, particularly 0.5 to 2.0 μm is preferable.
In addition, when the fluorescent pattern forming layer is provided on the magnetic stripe of the card oversheet, the thickness of the fluorescent pattern forming layer is not particularly limited, but the adhesiveness to the magnetic stripe transfer laminate is taken into consideration. The film thickness of the fluorescent pattern forming layer is preferably 0.5 to 5 μm, particularly preferably 0.5 to 2.0 μm.

In the fluorescent pattern forming method having the transfer step, as a method of diffusing the fluorescent dye of the fluorescent pattern forming layer into the transfer material, for example, a method of heating before transferring the transfer material to the card oversheet, and a transfer material The method of heating after transferring to the card oversheet is mentioned.
In the method of heating before transferring the transfer material to the card oversheet, a fluorescent pattern forming layer is provided on the transfer material, for example, a heat-sensitive adhesive layer, and then the transfer material is present on the transfer substrate. Aging in a constant temperature environment of 40 to 80 ° C. for several hours to several days. By this heating, the fluorescent dye is diffused to the transfer substrate side, and after transfer of the transfer material, the fluorescent pattern can be identified by ultraviolet irradiation from the transfer material side.
Examples of the method of heating after transferring the transfer material to the card oversheet include a method of diffusing the fluorescent dye into the transfer material using the heating in the step of hot-pressing the magnetic card sheet. . The magnetic card sheet is usually overlaid with an oversheet having a magnetic stripe, a center core with a card design, and an oversheet on the opposite side, and sandwiched between metal plates for hot-pressing and subjected to a temperature of 100 to 160 ° C., They are integrated and created by hot pressing for several minutes to several hours. At this time, as an oversheet having a magnetic stripe, a magnetic stripe transfer laminate having a fluorescent pattern forming layer transferred to a card oversheet, or a magnetic stripe transfer laminate having a fluorescent pattern forming layer A fluorescent pattern can be imparted to the magnetic card by using the one transferred to the oversheet for use. In this case, in the state of the oversheet having the magnetic stripe, the fluorescent pattern cannot be confirmed from the surface of the transfer material, but the fluorescent dye moves the inside of the transfer material toward the surface of the transfer material by heating in the above-described hot press process. It diffuses and finally the fluorescent pattern can be identified by the ultraviolet irradiation from the magnetic card surface.

The card oversheet and the card center core are required to have mechanical properties, water resistance, chemical resistance, etc. that can withstand use as a magnetic card. Polyethylene terephthalate (PET), polyvinyl chloride (PVC), polycarbonate ( PC), a synthetic resin sheet such as amorphous copolyester (PET-G) is used. The thickness of the card oversheet is, for example, 100 μm, and the center core sheet is, for example, 540 μm when one sheet is used, and is, for example, 270 μm when two sheets are used.
The method for forming a fluorescent pattern on a magnetic card using the transfer process has been described in detail. Using any substrate such as a sheet, card or plate instead of the magnetic card substrate and using an opaque layer other than the magnetic recording layer on the substrate using the same steps as described above A fluorescent pattern can be formed on and a laminate can be produced. The structure of the transfer laminate, such as the opaque layer and the fluorescent pattern forming layer, may be adjusted in consideration of the adhesiveness to various substrates and the use of each laminate, and adjusting the optimum layer configuration and blending for each layer.

The fluorescent pattern forming layer and the opaque layer used in the fluorescent pattern forming method of the present invention can be appropriately laminated on a recording material by a transfer process using a transfer laminate, but each layer can be used without using the transfer process. The necessary layers can be sequentially laminated on the recording material by using a coating process or a printing process using a paint or ink for forming the film. In the coating process and the printing process, in addition to the various coating and printing methods described above, printing by an ink jet recording method can also be performed. The layers necessary for the method can be formed. Thus, the laminated body before the heating process is prepared by the aging in a constant temperature environment of 40 to 80 ° C. or the thermal pressurization process in the same manner as in the transfer process, so that the fluorescent dye in the fluorescent pattern forming layer is obtained. Diffuses into or through the opaque layer.
By using the fluorescent pattern forming method of the present invention, fluorescent patterns can be formed on a wide variety of substrates.

As the recording material in the present invention, a substrate having deep irregularities whose surface shape is extremely complicated, a substrate unstable at the heating temperature during diffusion, a porous property or a solvent-absorbing substrate is not particularly preferable, It is not limited. The recording material is preferably a material that can stably form a fluorescent pattern forming layer, can be heated to a temperature necessary for thermal diffusion, and does not diffuse the fluorescent dye into the recording material during heating.
Thus, the embodiment of the present invention in which a fluorescent card is formed on a card-like substrate to produce a magnetic card with a fluorescent pattern is only a part of the possible embodiments of the present invention. For example, a fluorescent pattern can be formed by the above-described method for the purpose of authenticity determination and prevention of fraud in the painting and coloring processes of one component of various articles. Depending on the article, it is also possible to form a fluorescent pattern on a region of the surface of the finished product by the above method.
Further, when a transfer laminate in which a fluorescent dye is diffused in advance by aging is used, a fluorescent pattern can be formed on any recording material that can be transferred by using a transfer process using the laminate. Examples of articles of the present invention include banknotes, checks, bills, traveler's checks, passports, stock certificates, securities, gift certificates, stamps, postcards, book coupons, insurance cards, driver's licenses, certificates, prepaid cards, flexible disks, MO, CD, DVD, IC card, optical card, point card, membership card, brand tag, security seal, etc.

  The present invention will be described in more detail below using examples and comparative examples, but the present invention is not limited to the examples, and hereinafter, “parts” represents parts by mass.

Transfer base polyethylene terephthalate film (24μm thick)
Fluorescent dye diffusion prevention coating cellulose acetate resin 8 parts ("L-20" manufactured by Daicel Chemical Industries)
2 parts of cellulose acetate propionate resin (“CAP-504-0.2” manufactured by Eastman Chemical Co., Ltd.)
Acetone 25 parts Ethyl acetate 25 parts Toluene 20 parts Cyclohexanone 20 parts Polyisocyanate 4 parts (“Hardener No. 50 (active ingredient: 50%)” manufactured by Dainippon Ink & Chemicals, Inc.)
Cellulose acetate resin and cellulose acetate propionate resin were added to a mixed solvent of acetone, ethyl acetate, toluene, and cyclohexanone, and the resin component was completely dissolved with a disper. Thereafter, polyisocyanate was added to prepare a coating material for a fluorescent dye diffusion prevention layer.

Paint layer metal powder for coloring layer : 20 parts of aluminum powder ("210EA" manufactured by Showa Aluminum Powder Co., Ltd.)
16 parts of vinyl chloride-vinyl acetate copolymer resin (“VAGH” manufactured by Union Carbide)
4 parts of polyurethane resin (“TS-03” manufactured by Dainippon Ink & Chemicals, Inc.)
Methyl ethyl ketone 75 parts Toluene 75 parts Cyclohexanone 17 parts Polyisocyanate 5 parts ("Hardener No. 50 (active ingredient: 50%)" manufactured by Dainippon Ink & Chemicals, Inc.)
A vinyl chloride-vinyl acetate copolymer resin and a polyurethane resin were added to a mixed solvent of methyl ethyl ketone, toluene, and cyclohexane, and the resin component was completely dissolved with a disper. The flake aluminum powder was added thereto, and further stirred with a disper to uniformly disperse the flake aluminum powder in the paint. Then, the polyisocyanate was added and the coating material for colored layers was produced.

100 parts of barium ferrite magnetic powder for magnetic recording layer ("MC-127" manufactured by Toda Kogyo Co., Ltd .; coercive force 220 kA / m)
15 parts of vinyl chloride-vinyl acetate copolymer resin (“MR-110” manufactured by Nippon Zeon Co., Ltd.)
10 parts of polyurethane resin (“TS-03” manufactured by Dainippon Ink & Chemicals, Inc.)
Methyl ethyl ketone 50 parts Toluene 50 parts Cyclohexanone 25 parts Polyisocyanate 10 parts ("Hardener No. 50 (active ingredient: 50%)" manufactured by Dainippon Ink & Chemicals, Inc.)
A magnetic recording layer coating was prepared by the method described in JP-A-09-059541 using the above materials.

Heat sensitive adhesive paint polyurethane resin 1 part (Dainippon Ink Chemical Co., Ltd. “TS-03”)
4 parts of vinyl chloride-vinyl acetate copolymer resin (“Solvine C5” manufactured by Nissin Chemical)
Methyl ethyl ketone 45 parts Toluene 50 parts A polyurethane resin and vinyl chloride-vinyl acetate copolymer resin were dissolved in a mixed solvent of methyl ethyl ketone and toluene using a disper to prepare a heat-sensitive adhesive paint.

Fluorescent pattern forming ink [A]
3 parts of organic fluorescent material (“UVITEX OB” manufactured by Ciba Specialty Chemicals)
Titanium oxide (colored pigment) 6 parts (“JR-301” manufactured by Teika Co., Ltd.)
3 parts of polyurethane resin ("TS-03" manufactured by Dainippon Ink & Chemicals, Inc.)
12 parts of vinyl chloride-vinyl acetate copolymer resin (“Solvine C5” manufactured by Nissin Chemical)
Methyl ethyl ketone 38 parts Toluene 38 parts Polyurethane resin and vinyl chloride-vinyl acetate copolymer resin were added to a mixed solvent of methyl ethyl ketone and toluene, and the resin component was completely dissolved with a disper. Add titanium oxide to it, disperse the titanium oxide with a bead mill, and then add an organic fluorescent substance. Dissolve it completely using a disper to produce fluorescent pattern forming ink [A]. did.

Fluorescent pattern forming ink [B]
Organic fluorescent substance 4 parts ("UVITEX OB" manufactured by Ciba Specialty Chemicals)
3 parts of polyurethane resin ("TS-03" manufactured by Dainippon Ink & Chemicals, Inc.)
13 parts of vinyl chloride-vinyl acetate copolymer resin (“Solvine C5” manufactured by Nissin Chemical)
Methyl ethyl ketone 40 parts Toluene 40 parts Polyurethane resin and vinyl chloride-vinyl acetate copolymer resin were added to a mixed solvent of methyl ethyl ketone and toluene, and the resin component was completely dissolved with a disper. An organic fluorescent substance was added thereto, and further stirred with a disper to completely dissolve the organic fluorescent substance, thereby preparing a fluorescent picture forming ink [B].

Fluorescent pattern forming ink [C]
3 parts of inorganic fluorescent material (Honeywell “LUMILUX Red CD105FF”)
Titanium oxide (color pigment) 6 parts
3 parts of polyurethane resin ("TS-03" manufactured by Dainippon Ink & Chemicals, Inc.)
12 parts of vinyl chloride-vinyl acetate copolymer resin (“Solvine C5” manufactured by Nissin Chemical)
Methyl ethyl ketone 38 parts Toluene 38 parts Polyurethane resin and vinyl chloride-vinyl acetate copolymer resin were added to a mixed solvent of methyl ethyl ketone and toluene, and the resin component was completely dissolved with a disper. Titanium oxide and an inorganic fluorescent material were added thereto, and the titanium oxide and the inorganic fluorescent material were dispersed with a bead mill to prepare a fluorescent pattern forming ink [C].

Fluorescent pattern forming ink [D]
4 parts of inorganic fluorescent material (Honeywell "LUMILUX Red CD105FF")
3 parts of polyurethane resin ("TS-03" manufactured by Dainippon Ink & Chemicals, Inc.)
13 parts of vinyl chloride-vinyl acetate copolymer resin (“Solvine C5” manufactured by Nissin Chemical)
Methyl ethyl ketone 40 parts Toluene 40 parts Polyurethane resin and vinyl chloride-vinyl acetate copolymer resin were added to a mixed solvent of methyl ethyl ketone and toluene, and the resin component was completely dissolved with a disper. An inorganic fluorescent material was added thereto, and the inorganic fluorescent material was dispersed by a bead mill to produce a fluorescent pattern forming ink [D].

(Example 1) (A heat-sensitive adhesive layer, a magnetic recording layer, and a colored layer are formed on a fluorescent pattern forming layer.)
Preparation of transfer laminate On one side of the transfer substrate, the above-mentioned fluorescent dye diffusion prevention layer coating, colored layer coating, magnetic recording layer coating, and heat sensitive adhesive coating are all applied in this order, with a reverse coater. They were applied and dried to provide a fluorescent dye diffusion preventing layer, a colored layer, a magnetic recording layer, and a heat-sensitive adhesive layer. The thickness of each layer after drying was adjusted to 1 μm for the fluorescent dye diffusion preventing layer, 2.5 μm for the colored layer, 8 μm for the magnetic recording layer, and 1.5 μm for the adhesive layer.
Preparation of fluorescent pattern forming layer On the heat-sensitive adhesive layer of the transfer laminate prepared above, gravure printing using fluorescent pattern forming ink [A], the thickness of the pattern part after drying is 0.6 μm Thus, a fluorescent pattern forming layer was prepared. FIG. 5 shows a conceptual diagram of a transfer laminate provided with a fluorescent pattern forming layer. Thereafter, the transfer laminate on which the fluorescent pattern forming layer was formed was left in a constant temperature room at 60 ° C. for 24 hours to diffuse the fluorescent dye into the transfer material.
Inspection of fluorescent pattern The printing quality of the fluorescent pattern described above was measured using EasyMax. MC (manufactured by Hugh Tech) was used and inspected under normal light source.
Magnetic card production After the transfer laminate produced above was cut into a predetermined width to produce a magnetic stripe transfer laminate, a desktop heat sealer (manufactured by Tester Sangyo Co., Ltd.) was used to make the laminate made of polyvinyl chloride. The laminated body for magnetic stripe transfer was heat-pressure bonded to a card oversheet (manufactured by Taihei Chemical Co., Ltd.). Then, the magnetic stripe part was transcribe | transferred to the oversheet for cards by removing the transfer base material of the laminated body for magnetic stripe transfer, and the oversheet with a magnetic stripe was obtained. This overlaid sheet with magnetic stripe, the center core for the card, and the oversheet for the card on the opposite side are stacked, and using a flat pressure press (manufactured by Toyo Seiki Seisakusho), 140 ° C., 20 kg / cm ² , for 20 minutes. A hot-pressing process was performed on the card sheet. Thereafter, punching was performed to produce a magnetic card.

Example 2 (A magnetic recording layer and a colored layer are formed on a fluorescent pattern forming layer.)
On one side of creation transfer base material of the transfer laminate, said fluorescent dye diffusion preventing layer coating, colored layer coating, and a magnetic recording layer coating material in this order, either using a reverse coater, After drying, a fluorescent dye diffusion prevention layer, a colored layer, and a magnetic recording layer were provided. The thickness of each layer after drying was adjusted to 1 μm for the fluorescent dye diffusion preventing layer, 2.5 μm for the colored layer, and 8 μm for the magnetic recording layer.
Creation of fluorescent pattern forming layer On the magnetic recording layer of the transfer laminate produced above, gravure printing using fluorescent pattern forming ink [A] results in a film thickness of the patterned part of 0.6 μm after drying. Thus, a fluorescent pattern forming layer was prepared. Thereafter, the transfer regular relative formed with the fluorescent pattern forming layer was left in a constant temperature room at 60 ° C. for 24 hours to diffuse the fluorescent dye into the transfer material.
Inspection of fluorescent pattern The printing quality of the fluorescent pattern described above was measured using EasyMax. MC (manufactured by Hugh Tech) was used and inspected under a normal light source.
Heat-sensitive adhesive layer The heat-sensitive adhesive paint was applied and dried using a reverse coater so as to cover the fluorescent pattern forming layer of the transfer laminate, and a heat-sensitive adhesive layer was provided. The thickness of the heat-sensitive adhesive layer after drying was set to 1.5 μm.
Magnetic Card Production A magnetic stripe transfer laminate was prepared by cutting the transfer laminate produced above into a predetermined width, and a magnetic card was produced in the same manner as the magnetic card production method of Example 1.

(Example 3) (Aging at 60 ° C. is not performed in Example 1.)
In the fluorescent pattern printing of Example 1, a magnetic card was produced in the same manner as in Example 1 except that it was not left in a constant temperature room at 60 ° C. for 24 hours after the fluorescent pattern printing.

(Example 4) (Aging at 60 ° C. is not performed in Example 2)
In the fluorescent pattern printing of Example 2, a magnetic card was prepared in the same manner as in Example 2 except that it was not left in a constant temperature room at 60 ° C. for 24 hours after the fluorescent pattern printing.

(Example 5) (The fluorescent pattern forming layer is formed on the card oversheet side in Example 1.)
In Example 1, the magnetic stripe transfer laminate was prepared in the same manner as in Example 1. The fluorescent pattern forming layer was not a magnetic stripe transfer laminate, but the fluorescent stripe was formed on the portion of the card oversheet where the magnetic stripe was transferred. The film thickness after drying was set to 0.6 μm by a gravure printing method using the pattern ink [A]. A conceptual diagram of a card oversheet provided with a fluorescent picture forming layer is shown in FIG. In the subsequent steps, a magnetic card was produced in the same manner as the magnetic card production method of Example 1. The inspection of the printing quality of the fluorescent pattern forming layer was performed on the card oversheet provided with the fluorescent pattern forming layer.

(Comparative example 1) (The fluorescent picture printing ink which does not contain a color pigment in Example 1 is used.)
Preparation of transfer laminate On one side of the transfer substrate, the above-mentioned fluorescent dye diffusion prevention layer coating, colored layer coating, magnetic recording layer coating, and heat sensitive adhesive coating are all applied in this order, with a reverse coater. They were applied and dried to provide a fluorescent dye diffusion preventing layer, a colored layer, a magnetic recording layer, and a heat-sensitive adhesive layer. The thickness of each layer after drying was adjusted to 1 μm for the fluorescent dye diffusion preventing layer, 2.5 μm for the colored layer, 8 μm for the magnetic recording layer, and 1.5 μm for the adhesive layer.
Preparation of fluorescent pattern forming layer On the heat-sensitive adhesive layer of the transfer laminate prepared above, gravure printing using fluorescent pattern forming ink [B], the thickness of the pattern part after drying is 0.6 μm Thus, a fluorescent pattern forming layer was prepared. Thereafter, the transfer laminate on which the fluorescent pattern forming layer was formed was left in a constant temperature room at 60 ° C. for 24 hours to diffuse the fluorescent dye into the transfer material.
Inspection of fluorescent pattern The printing quality of the fluorescent pattern described above was measured using EasyMax. MC (manufactured by Hugh Tech) was used and inspected under normal light source.
Magnetic card production After the transfer laminate produced above was cut into a predetermined width to produce a magnetic stripe transfer laminate, a desktop heat sealer (manufactured by Tester Sangyo Co., Ltd.) was used to make the laminate made of polyvinyl chloride. The laminated body for magnetic stripe transfer was heat-pressure bonded to a card oversheet (manufactured by Taihei Chemical Co., Ltd.). Then, the magnetic stripe part was transcribe | transferred to the oversheet for cards by removing the transfer base material of the laminated body for magnetic stripe transfer, and the oversheet with a magnetic stripe was obtained. This magnetic striped oversheet, the card center core, and the card oversheet on the opposite side are stacked, and using a flat pressure press (manufactured by Toyo Seiki Seisakusho), 140 ° C., 20 kg / cm ² , for 20 minutes. A hot-pressing process was performed on the card sheet. Thereafter, punching was performed to produce a magnetic card.

(Comparative example 2) (The fluorescent picture printing ink which does not contain a color pigment in Example 2 is used.)
On one side of creation transfer base material of the transfer laminate, said fluorescent dye diffusion preventing layer coating, colored layer coating, and a magnetic recording layer coating material in this order, either using a reverse coater, After drying, a fluorescent dye diffusion prevention layer, a colored layer, and a magnetic recording layer were provided. The thickness of each layer after drying was adjusted to 1 μm for the fluorescent dye diffusion preventing layer, 2.5 μm for the colored layer, and 8 μm for the magnetic recording layer.
Creation of fluorescent pattern forming layer On the magnetic recording layer of the transfer laminate produced above, gravure printing using fluorescent pattern forming ink [B] results in a film thickness of the dried pattern portion of 0.6 μm. Thus, a fluorescent pattern forming layer was prepared. Thereafter, the transfer laminate on which the fluorescent pattern forming layer was formed was left in a constant temperature room at 60 ° C. for 24 hours to diffuse the fluorescent dye into the transfer material.
Inspection of fluorescent pattern The printing quality of the fluorescent pattern described above was measured using EasyMax. MC (manufactured by Hugh Tech) was used and inspected under normal light source.
Heat-sensitive adhesive layer The heat-sensitive adhesive paint was applied and dried using a reverse coater so as to cover the fluorescent pattern forming layer of the transfer laminate, and a heat-sensitive adhesive layer was provided. The thickness of the heat-sensitive adhesive layer after drying was set to 1.5 μm.
Magnetic Card Production The transfer laminate produced above was cut into a predetermined width to produce a magnetic stripe transfer laminate, and a magnetic card was produced in the same manner as the magnetic card production method of Comparative Example 1.

(Comparative Example 3) (Inorganic fluorescent material is used instead of fluorescent dye. Colored layer thickness: 2.5 μm)
Creation of a card base with magnetic stripe Oversheet with magnetic stripe created by transferring a magnetic stripe transfer laminate without a fluorescent pattern forming layer to a card oversheet without a fluorescent pattern forming layer, and a card The card core with magnetic stripe was obtained by stacking the center core for use and the card oversheet on the opposite side in this order and performing hot pressing.
Production of concealment layer transfer laminate for concealment card A polyethylene terephthalate film having a thickness of 188 μm was used as a transfer substrate, and the coating material for fluorescent dye diffusion prevention layer, the coating material for colored layer on one side of the transfer substrate, The heat-sensitive adhesive paint and the heat-sensitive adhesive paint were applied and dried in this order using a reverse coater, and a fluorescent dye diffusion preventing layer, a colored layer, and a heat-sensitive adhesive layer were provided, respectively. The thickness of each layer after drying was formed such that the fluorescent dye diffusion preventing layer was 1 μm, the colored layer was 2.5 μm, and the heat-sensitive adhesive layer was 1 μm or less. After forming the heat-sensitive adhesive layer, a fluorescent pattern forming layer was prepared by gravure printing using the fluorescent pattern forming ink [C]. The thickness of the fluorescent pattern forming layer after drying was set to 0.6 μm.
Inspecting the fluorescent pattern The printing quality of the fluorescent pattern forming layer was measured using EasyMax. MC (manufactured by Hugh Tech) was used and inspected under a normal light source.
Magnetic card production The fluorescent pattern forming layer side of the concealment layer transfer laminate for concealment cards was layered on the card base with magnetic stripe produced as described above, and the temperature was 130 ° C., the pressure was 18 kg / cm ² , and the time was 20 minutes. After heating and pressurizing to adhere the concealment layer transfer laminate for concealment card to the card substrate with magnetic stripe, the polyethylene terephthalate film which is the transfer substrate of the transfer laminate was peeled off to prepare a magnetic card.

(Comparative Example 4) (Inorganic fluorescent material is used instead of fluorescent dye. Colored layer thickness is 7 μm)
In Comparative Example 3, a magnetic card was prepared in the same manner as in Comparative Example 3 except that the thickness of the colored layer of the concealment layer transfer laminate for concealment card after drying was 7 μm.

(Comparative Example 5) (Inorganic fluorescent material is used instead of organic dye, and no color pigment is used.)
In Comparative Example 3, a magnetic card was prepared in the same manner as in Comparative Example 3, except that the fluorescent pattern forming ink was changed to the fluorescent pattern forming ink [D].

Evaluation method (invisibility of fluorescent pattern printing area)
The presence or absence of the fluorescent pattern forming layer was visually evaluated under sunlight and indoor light.
○: The presence of the fluorescent pattern forming layer cannot be confirmed.
X: The presence of the fluorescent pattern forming layer can be confirmed.

(Fluorescence emission by UV irradiation)
The fluorescent emission intensity of the fluorescent pattern by ultraviolet irradiation was evaluated visually.
A sufficient fluorescence can be obtained.
Δ: Fluorescence emission is insufficient and it can be recognized that there is luminescence, but the pattern cannot be identified ×: Fluorescence emission is insufficient, and the fluorescence pattern cannot be recognized at all.

(Possibility of inspection of print quality by defect inspection machine)
EasyMax. MC (manufactured by Hughtech) was used to evaluate the feasibility of inspection of the fluorescent pattern print quality under a normal light source.
○ ・ ・ ・ Inspection of print quality with sufficient sensitivity.
×: The image cannot be recognized and the print quality cannot be inspected.

(Output fluctuation)
Based on ISO / IEC7811-6, the recording / reproduction characteristics of the obtained magnetic card were measured using MAGTESTER 2000 manufactured by BARNES, and the output fluctuation was determined by the following equation. For the transfer-type magnetic tape used to make this magnetic card sample, adjust the film thickness of the magnetic recording layer according to each spacing and adjust the output average value to be equal to the reference card output. went.
Output fluctuation (%) = ((maximum output value−minimum output value) / average output value) × 100
○: Less than 5%. Δ: 5% or more and less than 10%. X: 10% or more.

  As is apparent from the results in Table 1, Examples 1 to 4 ensure the invisibility of the fluorescent pattern forming layer, ensure sufficient fluorescence emission intensity, and print the fluorescent pattern using a general defect inspection machine. Satisfies quality assurance. Further, in Examples 1 to 4, since the fluorescent dye used for fluorescent pattern printing is diffused in the magnetic recording layer and the colored layer, the fluorescent stripe portion and the non-pattern portion are arranged between the magnetic stripe surface and the magnetic recording layer. The distance is substantially unchanged. For this reason, output fluctuation caused by the fluorescent pattern does not occur at all, so that the authenticity determination of the card is ensured. On the other hand, Comparative Example 1 and Comparative Example 2 cannot be inspected for print quality because the fluorescent pattern forming layer does not contain a color pigment. In Comparative Example 3, Comparative Example 4, and Comparative Example 5, an inorganic fluorescent material that does not diffuse in the opaque layer was used. The fluorescent pattern layer was provided on the magnetic recording layer and the fluorescent pattern layer was concealed with a colored layer. If the colored layer is 2.5 μm, the fluorescent pattern cannot be made invisible, and if it is 7 μm, light emission due to ultraviolet irradiation cannot be confirmed, and the thickness setting region of the colored layer is narrow. Further, in Comparative Example 5, the coloring pattern was not contained in the fluorescent pattern layer, and the print quality could not be inspected. Further, since Comparative Examples 3, 4, and 5 were formed on the magnetic recording layer, fluctuations in reproduction output increased.

It is sectional drawing which shows one embodiment of the laminated body for transcription | transfer used for the fluorescent pattern formation method of this invention. It is sectional drawing which showed notionally the mode that the fluorescent dye of a pattern spread | diffused when performing the aging of the said laminated body for transfer. It is one embodiment of the fluorescent picture formation method of this invention, Comprising: It is sectional drawing which showed notionally the case where a fluorescent picture formation layer is formed in the oversheet for cards. It is sectional drawing which shows one embodiment of the magnetic card formed by the fluorescent picture formation method of this invention. 3 is a conceptual diagram showing a magnetic stripe transfer laminate and a fluorescent pattern forming layer manufactured in Example 1. FIG. 6 is a schematic diagram showing a fluorescent pattern forming layer in the manufacture of Example 5. FIG. It is a figure showing an example of a process at the time of manufacturing the magnetic card | curd which has a magnetic recording layer and a fluorescent pattern using the transfer laminated body using the fluorescent pattern formation method of this invention. It is a figure showing the other example of a process when manufacturing the magnetic card | curd which has a magnetic recording layer and a fluorescence pattern using the laminated body for transcription | transfer using the fluorescent pattern formation method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluorescent dye diffusion prevention layer 2 Fluorescent dye diffusion area 3 Colored layer 4 Magnetic recording layer 5 Thermal adhesive layer 6 Card oversheet 7 Card center core 8 Card design 9 Transfer substrate 10 Fluorescent pattern forming layer

Claims (15)

  A method of forming a fluorescent pattern that can be identified by ultraviolet irradiation on a recording material, the fluorescent pattern forming layer containing a fluorescent dye and a coloring pigment from the side close to the recording material, and the fluorescent pattern formation A fluorescent pattern forming method, comprising: forming an opaque layer that masks the layer; and diffusing only the fluorescent dye of the fluorescent pattern forming layer into or through the opaque layer.   2. The opaque layer or the fluorescent pattern forming layer is formed by a transfer process using a transfer laminate in which the opaque layer or the fluorescent pattern forming layer is formed on a transfer base material. Fluorescent pattern formation method.   The opaque layer and the fluorescent pattern forming layer are transferred onto the recording material using a transfer laminate in which the opaque layer and the fluorescent pattern forming layer are formed in this order on a transfer substrate. The fluorescent picture formation method according to claim 1.   The fluorescent pattern forming method according to any one of claims 1 to 3, wherein a transparent fluorescent dye diffusion preventing layer is provided on the opposite side of the opaque layer from the fluorescent pattern forming layer before the fluorescent dye is diffused. .   The fluorescent pattern forming method according to claim 1, wherein the opaque layer includes a magnetic recording layer.   6. The fluorescent pattern forming method according to claim 5, wherein the opaque layer further includes a colored layer formed on the magnetic recording layer on a side opposite to the fluorescent pattern forming layer. The laminated body by which the fluorescent pattern was formed by the fluorescent pattern formation method in any one of Claims 1-4. A magnetic recording medium, wherein a fluorescent pattern is formed by the fluorescent pattern forming method according to claim 5. An article in which a fluorescent pattern is formed by the fluorescent pattern forming method according to claim 1.   1. A transfer laminate for forming a fluorescent pattern, comprising an opaque layer and a fluorescent pattern forming layer containing a fluorescent dye and a coloring pigment in this order on a transfer substrate.   11. The transfer laminate according to claim 10, wherein only the fluorescent dye of the fluorescent pattern forming layer diffuses into the front opaque layer or through the opaque layer.   The transfer laminate according to claim 11, wherein the fluorescent dye is distributed over the entire width of the opaque layer in the film thickness direction.   The transfer laminate according to any one of claims 10 to 12, further comprising a fluorescent dye diffusion prevention layer on a side closest to the transfer substrate of the transfer laminate.   The transfer laminate according to claim 10, wherein the opaque layer contains a magnetic recording layer. The transfer laminate according to claim 14, wherein the opaque layer includes a colored layer and a magnetic recording layer stacked from a side close to the transfer substrate.

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