JP2001162974A - Card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card having a high preventing effect against the altering or forgery of information. SOLUTION: A pearl printing layer 2, employing an ink containing pearl pigment, is formed on a card substrate 1 and a print receiver layer 3 is provided so as to cover the pearl printing layer 2 while arbitrary information 4 is printed on the print receiver layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various cards such as a card containing a sublimation print photograph such as a small driver's license and a commuter pass card for preventing copying.

[0002]

2. Description of the Related Art In this type of conventional card, a printable layer is formed on the surface of the card, and all the information is printed on this layer each time it is issued.

In such a conventional card, thermal transfer,
Although it is possible to print immediately using an electronic image forming technology such as an electrostatic type, since all printed information is exposed on the surface of the card, it is relatively easy to falsify or forge such as rewriting the information. Was.

On the other hand, Japanese Utility Model Publication No. 7-51342 discloses that
There is described a card in which fixed information is printed in advance on the surface of a card base, a sublimation type thermal transfer image receiving layer is formed thereon, and arbitrary information is printed on the sublimation type thermal transfer image receiving layer.

In Japanese Patent Application Laid-Open No. Hei 5-8557, a transparent dye-receiving layer is provided on a base sheet via an arbitrary pattern (forgery-inhibited pattern), and an image composed of a sublimable dye is provided thereon. A printed matter applicable to a card is described, wherein the pattern forms a background of the image.

[0006]

Problems to be Solved by the Invention
According to the card described in Japanese Patent Laid-Open Publication No. H06-157, the fixed information previously printed on the card base is covered with the sublimation type thermal transfer image receiving layer, so that it is relatively difficult to rewrite the fixed information, and the effect of preventing tampering and forgery is prevented. Can be expected. However, with respect to arbitrary information such as personal information printed on the sublimation type thermal transfer image receiving layer, the effect of preventing falsification and forgery cannot be expected so much. In addition, it is hard to say that countermeasures against counterfeiting using color copiers, which have been getting more sophisticated in recent years, are not perfect.

Further, according to the card disclosed in Japanese Patent Application Laid-Open No. Hei 5-8557, for example, when a fake face photograph or the like is stuck, the copy-forgery-inhibited pattern is concealed in the range of the stuck face photograph and the tampered or forged one is used. It is clear that even if an image is to be erased with a special chemical, the copy-forgery-inhibited pattern under the image is also erased at the same time, making it difficult to restore the image.
However, since the color of the surface of the card is partially changed by the tint block, the reproducibility and visibility of an image such as a face photograph formed by a sublimable dye are easily affected, and described in Japanese Utility Model Publication No. 7-51342. As with the cards, the countermeasures against counterfeiting by color copiers are not perfect.

Further, when printing arbitrary information on the above-mentioned sublimation type thermal transfer image receiving layer (transparent dye receiving layer) by thermal transfer recording, particularly when printing a sublimation print photograph such as a small driving license, the copy-forgery-inhibited pattern or the like is not included. The sublimation-type thermal transfer image-receiving layer is required to have high flatness so as not to deteriorate the print quality of the photograph, and generally, it is necessary to form the sublimation-type thermal transfer image-receiving layer with a thickness not less than the thickness of the fixed information or the tint block printing layer. . However, the fixed information printing layer, which needs to be easily readable from the outside, cannot be made extremely thin, and the sublimation type thermal transfer image receiving layer simply prints an image by thermal transfer recording. Significantly larger than the required minimum thickness required for the above.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to have a high effect of preventing not only alteration or forgery of not only fixed information but also arbitrary information, and to form a thinner image receiving layer.
An object of the present invention is to provide a card excellent in reproducibility and visibility of arbitrary information such as images and fixed information.

[0010]

According to the card of the present invention which has been achieved to achieve the above object, a pearl printing layer using an ink containing a pearl pigment is formed on a card substrate, and the pearl printing layer is covered. A print image receiving layer is provided as described above, and arbitrary information is printed on the print image receiving layer.

[0011]

The pearl printing layer using the ink containing the pearl pigment according to the present invention has a small difference in reflectance between the portion where the pearl pigment is provided and the portion where the pearl pigment is not provided (it is difficult to discriminate mechanically). And the like, the pearl print layer cannot be reproduced at all. On the other hand, if the pearl print layer is tilted obliquely, the pearl print layer can be visually confirmed, so that the forgery prevention effect is high.

Since the pearl print layer hardly affects the reflectance as described above, the pearl print layer has little influence on the visibility of arbitrary information such as an image formed on the print image receiving layer.

Furthermore, since pearl printing has a glittering effect and a flip-flop effect (an effect in which the color varies depending on the viewing angle) even if it is thin, the pearl printing layer can be formed thin, and as a result, the print image receiving layer is also thin. It is possible to For this reason, it is extremely difficult to falsify any information on the print image receiving layer without damaging the pearl print layer, and a high effect of preventing falsification or forgery of the arbitrary information can be obtained.

[0014]

FIG. 1 is a sectional view showing the basic structure of a card according to the present invention. In FIG. 1, 1 is a card substrate, 2 is a pearl print layer, 3 is a print image receiving layer, and 4 is a print layer of arbitrary information (arbitrary information print layer).

In the card of the present invention, a print image receiving layer 3 is provided so as to cover a pearl print layer 2 formed on a card substrate 1, and that the optional information 4 is printed on the print image receiving layer 3. Features.

As the card base material 1, resin sheets such as polyester resin, ABS resin, and vinyl chloride resin used as various card base materials, heat transfer paper, woodfree paper, art paper, coated paper, and the like; After a resin sheet or paper is used as a core material and a desired color is printed on the core material, an over sheet laminated with a resin can be used. Among these, white PET, which exerts relatively little load on the environment and is excellent in whiteness and durability, is particularly preferable.

If the card base material 1 has poor adhesion to a print image receiving layer 3 described later, it is preferable to apply a primer treatment or a corona discharge treatment to the surface thereof.

The pearl print layer 2 forms a tint block layer made of an arbitrary picture, figure, character or the like formed using an ink containing a pearl pigment.

A pearl pigment is a pigment that exhibits pearl luster based on the interference effect of light. For example, a natural pearl luster pigment collected from fish scales or a natural or synthetic mica is used as a main component. Metal oxides such as titanium dioxide, iron oxide and tin oxide or those coated with various coloring pigments are used.

Since the shape of the pearl pigment is irregular or scaly and thin and flat, the pearl printing layer formed thereby can obtain a predetermined glitter and flip-flop effect even if it is relatively thin. be able to.

The color of the pearl pigment is silver (white) or an iris type blue, green, gold, or the like, and is originally a light color, so that the arbitrary information print layer 4 printed on the print image receiving layer 3 is visually recognized. The effect on sex is small.

The pearl pigment ink comprises a pearl pigment, a binder resin and a solvent.

The binder resin used here is generally used as a coating resin, and is not particularly limited. Specific examples include polyester resin, vinyl chloride-vinyl acetate copolymer, urethane resin, acrylic resin, alkyd resin, and the like. These may be used alone or in combination.

[0024] The solvent used here is generally blended in the paint, and is not particularly limited. Specific examples include aromatic hydrocarbons such as toluene and xylene, esters such as ethyl acetate and butyl acetate, and ketones such as methyl ethyl ketone and methyl ethyl isobutyl ketone. These solvents are preferably used as a mixture of two or more kinds, and the composition thereof is appropriately selected depending on the solubility in the resin, the pigment dispersibility, and the like.

The pearl pigment is used in an amount of 50 to 200 parts by weight, preferably 100 to 150 parts by weight, per 100 parts by weight of the resin solid content.
It is preferable to mix by weight. If the amount of the pearl pigment is too small, the brilliancy peculiar to pearl cannot be obtained. On the other hand, if the amount of the pearl pigment is too large, the pearl print layer 2 that forms the tint block becomes thick, and the surface of the print image receiving layer 3 tends to have irregularities.

The pearl printing layer 2 is formed by using an ink containing the above-mentioned pearl pigment, for example, by various printing methods such as gravure printing, offset printing, and screen printing, and printing by various printers such as a thermal transfer printer, an ink jet printer, and a laser printer. Can be formed by

The print image receiving layer 3 does not substantially cover the pearl print layer 2 formed on the card substrate 1 surface,
This is for receiving the sublimable dye transferred from the transfer film and maintaining the formed characters and images.

As a method for forming the print image receiving layer 3, there are a coating method and a transfer method. In the coating method, when the surface of the card base material lacks smoothness, it is preferable that the surface of the card base material is preliminarily sealed with latex or the like. In the transfer method, a print image receiving layer having excellent surface smoothness can be formed even when the surface of the card base material lacks smoothness like plain paper.

The image-receiving layer transfer film used in the transfer method comprises a polyester resin, an epoxy resin, a vinyl chloride resin, a vinyl acetate resin, a vinyl chloride resin on one surface of a base film such as a polyester film or a polyimide film.
Those having a transparent image receiving layer formed of a resin capable of dyeing a sublimable dye such as a vinyl acetate copolymer or a styrene resin can be used. Further, for the purpose of imparting adhesion and the like as necessary on the image receiving layer, a transparent adhesive layer made of vinyl chloride-vinyl acetate copolymer, acrylic resin, polyamide resin, polyester resin, polyurethane resin, etc. After being formed, the adhesive layer may further contain a pigment, a filler, a foaming agent and the like within a range that does not impair the transparency for the purpose of imparting cushioning property and the like.

In the transfer of the image receiving layer 3 using the image receiving layer transfer film, the film is superimposed on the surface of the card substrate 1 on which the pearl print layer 2 has been formed in advance, and heated and pressed with a thermal head or the like from the back. Thereby, it can be transferred only to a necessary area of the card base material 1.

An arbitrary information print layer 4 is formed on the print image receiving layer 3 by a sublimation transfer type printer. Such optional information is, for example, personal information (address, name, date of birth, face photograph, etc.), issue date, card number, expiration date, and the like.

Since the dye used in the sublimation transfer system has transparency, even if the pearl print layer 2 and the optional information print layer 4 overlap, the pearl print layer 2 can be seen through.

In the card of the present invention having the above configuration,
The pearl print layer 2 forming a tint block by an arbitrary picture, figure, character, or the like cannot be faithfully reproduced by color copying due to the glitter and flip-flop effect. Therefore, the card of the present invention has an effect of preventing forgery by a color copier, and can be suitably used as a certification card such as a small driver's license.

Further, as described above, pearl printing exerts glitter and flip-flop effects even if it is relatively thin. In the present invention, the thickness of the pearl print layer 2 is set to 0.5 to
Preferably it is 2 μm. If the thickness is less than 0.5 μm, it is difficult to recognize from the outside. on the other hand,
If it exceeds 2 μm, it is necessary to form the print image receiving layer 3 thicker than necessary in order to flatten this step, and the amount of expensive pearl pigment ink used is increased, which is uneconomical.

As described above, according to the card of the present invention, a predetermined effect can be obtained even if the pearl print layer 2 serving as the copy-forgery-inhibited pattern layer is made thin, and the resulting surface irregularities can be reduced. The print image receiving layer 3 requiring such high smoothness can be similarly thinned. Therefore, it is extremely difficult to falsify the optional information print layer 4 on the print image receiving layer 3 without damaging the pearl print layer 2, and in particular, at least a part of the pearl print layer 3 may overlap with the optional information print layer 4. In this case, a high effect of preventing falsification or forgery of arbitrary information can be obtained.

The thickness of the print image receiving layer 3 can be about 2 to 4 μm if the thickness of the pearl print layer 2 is 0.5 to 2 μm. Is 1 to 2 μm, and the thickness of the print image receiving layer is 2 μm.
It is particularly preferred that the thickness be 3 μm.

FIG. 2 shows another example of the structure of the card of the present invention.

The card of this embodiment is obtained by adding a fixed information printing layer 5, a protection layer 6, and a stamp fixing layer 7 to the basic configuration of FIG.

In the card of this embodiment, a fixed information printing layer 5 (fixed information printing layer) is formed on the print image receiving layer 3 in addition to the arbitrary information printing layer 4. Such fixed information printing layer 5
For example, in the case of a credential card, the type of qualification,
In addition to character information such as "issue date" characters, "name" characters, "birth date" characters, and "main register" characters, the information includes frames, designs, and the like.

The protective layer 6 is a protective layer for the optional information printing layer 4 and the fixed information printing layer 5. The protective layer 6 is made of a protective laminate sheet (film) such as a polyester film, a vinyl chloride resin film, a polycarbonate film or a polypropylene film. It can be attached to the surface of the fixed information printing layer 5 and the surface of the fixed information printing layer 5 with an adhesive layer, if necessary, with a heat roll or a hot press, or can be formed using a thermal transfer method.

Further, the stamp fixing layer 7 formed on the back surface of the card substrate 1 can be formed by applying a material in which a white pigment such as silica is dispersed in a polyester resin or the like.

The card of this embodiment is issued after printing arbitrary information on a fixed information printed in advance and then forming a protective layer 6. As described above, since the fixed information is printed in advance in the card of the present example, even when handling many types of cards, there is little danger of misidentifying the card type at the time of issuance.

[0043]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples.

Examples 1 to 4 A pearl pigment ink was obtained by uniformly mixing a flaky pearl pigment in a mixture of a binder resin and a solvent. The pearl pigment is trade name "Iridion No. 111" (manufactured by Merck), the binder resin is a mixture of polyester and vinyl chloride-vinyl acetate copolymer, and the solvent is a mixture of methyl ethyl ketone and toluene in a ratio of 1: 1. Was used. The amounts (parts by weight) of these components are shown in Table 1.

[0045]

[Table 1]

Using the above-mentioned pearl pigment ink, a thickness of 2
A predetermined tint block was printed on the surface of a 50 μm white PET film by gravure printing. Next, a coating liquid for a print image receiving layer was applied and dried to obtain a print image receiving layer.

Table 2 shows the thickness of the pearl print layer and print image receiving layer formed as described above.

Next, on the print image receiving layer, using a thermal transfer sheet containing a sublimable dye, arbitrary information consisting of photographs and characters was printed by a sublimation printer.

The reflectance of the pearl print layer of each card produced as described above was measured, and the quality of the optional information print layer was evaluated as follows. Table 2 shows the results.

<Measurement of Reflectance> Measurement of 45 ° irradiation and 0 ° light receiving reflectance by Macbeth print contrast meter “PCM-2”.

<Evaluation of Quality of Arbitrary Information Print Layer> The presence or absence of print unevenness, color omission, stain, etc. was visually confirmed.

[0052]

[Table 2]

In the card according to the present invention, even if the pearl print layer is formed thin (in particular, about 1 μm as in the first embodiment), the pearl print layer has sufficient glittering and flip-flop effects that can be recognized from the outside. Is thicker and the print image receiving layer is as thick as the pearl print layer (Example 4
As described above, high smoothness was obtained as high as 2 μm), and the quality of the optional information printing layer was sufficiently high.

The reflectance when the pearl print layer is formed is not much different from the reflectance when the pearl print layer is not formed (the reflectance is 85% in the same measurement). I couldn't reproduce at all. On the other hand, the pearl print layer could be easily confirmed visually by tilting the card obliquely.

[0055]

As described above, according to the card of the present invention, the pearl print layer forming the copy-forgery-inhibited pattern layer cannot be faithfully reproduced by color copying or the like. The pearl print layer can be confirmed by the above, so that the forgery prevention effect is high.

Further, since the pearl print layer hardly affects the light reflectance, the reproducibility and visibility of arbitrary information such as images formed on the print image receiving layer are not reduced.

Further, even if the pearl print layer forming the copy-forgery-inhibited pattern layer is formed thin, it can be recognized from the outside, so that the print image-receiving layer can be made thin. as a result,
It is extremely difficult to falsify any information on the print image receiving layer without damaging the pearl print layer, and an extremely high effect of preventing falsification or forgery of any information can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a basic configuration of a card of the present invention.

FIG. 2 is a sectional view showing another configuration example of the card of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Card base material 2 Pearl printing layer (background pattern layer) 3 Print image receiving layer 4 Arbitrary information printing layer 5 Fixed information printing layer 6 Protective layer 7 Stamp fixing layer

Continued on the front page (72) Inventor Masahiro Honda 4-14-12 Koishikawa, Bunkyo-ku, Tokyo Kyodo Printing Co., Ltd. F-term (reference) 2C005 HA04 HA05 HB03 HB13 JB02 JB25 JC03 KA03 KA06 KA40 2H111 AA01 AA07 AA27 CA03 CA11

Claims (4)

[Claims] 1. A pearl printing layer using an ink containing a pearl pigment is formed on a card base material, a print image receiving layer is provided so as to cover the pearl printing layer, and arbitrary information is printed on the print image receiving layer. A card characterized by being. 2. The card according to claim 1, wherein the pearl print layer is formed so that at least a part thereof overlaps the optional information. 3. The card according to claim 1, wherein fixed information is further printed on the print image receiving layer. 4. The pearl printing layer has a thickness of 0.5 to 2 μm.
m, and the thickness of the print image receiving layer on the pearl print layer is 2 to 4 μm.
A card according to any one of the preceding claims.