JPH03159796A - Card - Google Patents

Abstract

PURPOSE:To obtain a card further excellent in indelible properties and forgery preventing properties, in the card wherein data such as a face photograph and a character are formed to the surface of a card base material and a transparent protective layer is provided to the surface of a part of those data if necessary through an adhesive layer, by containing a photosensitive material not concealing data in the adhesive layer and/or the protective layer. CONSTITUTION:In a card wherein data such as a face photograph 2 and a character 3 are formed to the surface of a card base material 1 and a transparent protective layer 5 is provided to the surface of at least a part of those data if necessary through an adhesive layer 4, a photosensitive material not substantially concealing the data is contained in the adhesive layer 4 and/or the protective layer 5. As an example of the photosensitive material not concealing recording data, a general colorant having high transparency capable of being observed by the naked eye under visible light, for example, pigment, a dye or a fluorescent dye is designated and this colorant may be contained in the adhesive layer and/or the protective layer in relatively low concn.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a card, and more particularly to a card with excellent tamper-proofing and counterfeiting-proofing properties.

(Prior art and its problems) Conventionally, many cards such as identification cards, driver's licenses, membership cards, etc. have been used, and these cards record various information that reveals the identity of the owner. There is. Particularly in RD cards and the like, the image of the face is most important along with textual information such as address and name. The classic method of attaching facial photographs to various cards is to attach the facial photograph to a predetermined part of the card base material using adhesive, but this method is extremely complicated to operate. Additionally, there are problems in that the surface of the card becomes uneven and loses its smoothness, and furthermore, it is easy to falsify or forge by replacing the face photo.

As a way to solve the drawbacks of the above method of attaching facial photos,
An image forming method using a sublimation transfer method has been developed. In this sublimation transfer method, a sublimation type thermal transfer sheet, which has a layer containing a dye that can be sublimated and transferred by heat on the surface of the base film, is layered on a card base material, and then heated from the back side of the sublimation transfer sheet with a thermal head to create a card. It has the advantage that facial photographs can be reproduced with Motomurakami and various characters etc. can be printed at the same time, and these characters can also be formed using a hot-melt ink type thermal transfer method, both of which can be carried out with a simple thermal transfer printer. However, since the various types of information obtained by the thermal transfer method described above are insufficient in terms of abrasion resistance and the like, a transparent surface protective layer having excellent abrasion resistance and the like is generally provided on the surface of facial photographs and the like.

Cards produced by the above method have excellent flatness, tamper-proofing properties, and counterfeit-proofing properties, especially since the facial photograph is formed by dyeing the card base material. It cannot be completely ruled out that there is a risk that the protective layer may be removed with , acid, base, etc., and facial photos and other information may be tampered with or forged. Therefore, an object of the present invention is to provide a card that is even more excellent in tamper-proofing and forgery-proofing properties. (Means for solving the problems) The above object is achieved by the present invention as described below.

That is, the present invention provides a card in which information such as a face photograph and characters is formed on the surface of a card base material, and a transparent protective layer is provided on at least a part of the surface of this information, if necessary, via an adhesive layer. , the card is characterized in that the adhesive layer and/or the protective layer contain a photosensitive material that does not substantially hide the information.

(Function) By incorporating a photosensitive material that does not substantially hide the above information into the adhesive layer and/or protective layer that covers various information on the card, it is possible to falsify or forge facial photographs, etc. In the case of Since these adhesive layers and/or protective layers are difficult to restore, even if the card is tampered with or counterfeited, it will be easily discovered, and therefore it is difficult to tamper with or counterfeit the card.

(Preferred Embodiments) Next, the present invention will be described in more detail by citing preferred embodiments.

The card of the present invention has information such as a facial photograph 2 and characters 3 formed on the surface of a card base material 1, as shown in FIG. A card provided with a transparent protective layer 5 via an adhesive layer 4 as necessary, characterized in that a photosensitive material that does not substantially hide the above information is included inside the adhesive layer 4 and/or the protection N5. Suppose that The card base material used in the above card of the present invention may be made of conventionally known polyester, borovinyl chloride, or other materials as long as the surface thereof has a dye-receiving layer dyed with a sublimable dye. It may be made of resin, metal, etc., but is not particularly limited.

The example shown in the first diagram is a preferred card base l in the present invention.
This example shows a structure in which transparent polyvinyl chloride layers 7 and 7' are laminated on both sides of a center core 6 made of polyvinyl chloride containing a white pigment. At least the transparent vinyl chloride layer 7, which is the image forming surface, contains an appropriate amount of plasticizer to improve dyeability.

The preferred range of the amount of these plasticizers is 0.1 to 10 parts by weight per 100 parts by weight of polyvinyl chloride forming the dye-receiving surface 7.
Parts by weight, and a particularly preferred range is from 3 to 5 parts by weight. If the amount of plasticizer used is too small, the dyeability for sublimation dyes will be insufficient, and abnormal transfer will occur where the dye layer of the thermal transfer sheet is transferred as is during thermal transfer.
If the amount is too large, the rigidity of the dye-receiving surface will be insufficient and it will become soft, and the printed image will bleed during storage, making it impossible to obtain a clear image, which is not preferable.

The dye-receiving surface 7 may optionally contain colored pigments, white pigments, extender pigments, fillers, ultraviolet absorbers, antistatic agents, heat stabilizers, antioxidants, optical brighteners, etc. I can do it.

A necessary magnetic recording layer 8, an embossed pattern (not shown), other printed patterns, an optical memory, an IC memory, a bar code, etc. may be formed on the surface of such a card base l in advance. However, these magnetic recording layers and the like may be provided after forming information such as a facial photograph using a sublimation transfer method or the like.

The facial photograph 2 provided on the card base material 1 can be formed in accordance with a conventional method using a known sublimation type thermal transfer sheet. Further, at the same time, information 3 such as characters can be formed using a sublimation type thermal transfer sheet, but it is preferable to form these character information 3 using a hot melt ink type thermal transfer sheet, which is capable of high-density black printing. Of course, these face photos 2
Although the text information 3 and text information 3 may be formed using separate thermal transfer sheets, it is advantageous in terms of process to form them simultaneously using a composite thermal transfer sheet that has both a sublimable dye layer and a meltable ink layer.

Lamination of the protective layer 5 for improving the durability of recorded information such as facial photographs can be carried out by applying and drying a transparent paint, laminating a transparent film, or further using a protective layer thermal transfer sheet. These protective layers 5 may be provided on the entire surface of the recorded information, or may be provided on a portion thereof. Although these protective layers 5 may be provided in a separate process from the recording of each information, in a preferred embodiment of the present invention, a sublimable dye layer of at least one color, at least L color, is provided on the base film. By using a composite thermal transfer sheet in which heat-melting ink layers and protective layers are sequentially provided, gradation images such as facial photographs and landscapes, monotonous images such as letters and symbols, and transparent protective layers can be printed in the same manner. can be formed simultaneously with a thermal transfer sheet.

In the present invention, in order to further improve the tamper-proofing properties and anti-counterfeiting properties of the above-mentioned card, a photosensitive material that does not substantially conceal the above-mentioned information is formed inside the adhesive layer 4 and/or the protection N5. It is characterized by the fact that Examples of photosensitive materials that do not hide recorded information include:
A highly transparent general coloring agent that can be observed with the naked eye under visible light.
Examples include pigments, dyes, fluorescent dyes, and the like, and these colorants may be included in the adhesive layer and/or the protective layer at relatively low concentrations.

On the other hand, photosensitive materials that cannot be recognized with the naked eye but can be recognized with infrared rays, ultraviolet rays, etc. include infrared absorbers, ultraviolet cotton absorbers,
Examples include fluorescent whitening agents.

As for the method of forming the adhesive layer and/or protective layer containing the above photosensitive material, it is preferable to select an appropriate method depending on the form and method of the protective layer. For example, when the protective layer is formed from a film laminate, the above-mentioned photosensitive material may be included in the film or the adhesive layer provided on its surface in advance.

In addition, when forming by a coating method, it is sufficient to include a photosensitive material in the paint. A preferred method in the present invention is a method of forming the protective layer by a thermal transfer method. That is, as an example, by preliminarily incorporating a photosensitive material in the adhesive layer 4 and/or the protective layer 5 of a protective layer thermal transfer sheet as shown in the second figure, the adhesive layer 4 and/or the protective layer 5 containing the photosensitive material can be formed. can be formed on the surface of information such as the face photograph 2 formed on the card, so the process is very free. (Effects) According to the present invention as described above, a photosensitive material that does not substantially hide the information is included in the adhesive layer and/or the protective layer that covers various information on the card. If you try to falsify or forge a face photo, etc., it is difficult to restore these adhesive layers and/or protective layers, so even if you tamper or forge a card, it will be easily discovered, so tampering and forgery of cards will be difficult. Have difficulty.

(Example) Next, the present invention will be explained in more detail with reference to Examples. In the text, parts or percentages are based on weight unless otherwise specified.

Example 1 Polyvinyl chloride containing about 10% of additives such as stabilizers (
A white card base material core (thickness: 0.2 mm, size: 30 x 30 cm) was prepared from a composition of 100 parts of a compound (degree of polymerization: 800) and 15 parts of a white pigment (titanium oxide).

Next, a transparent sheet (thickness 0.1
A card base material used in the present invention was prepared by thermocompression bonding to both sides of the white core.

Three color inks each containing three color sublimable dyes having the following compositions were prepared.

Yellow ink disperse dye (Macrolex Yellow 6G, manufactured by Bayer AG, C.I. Disperse Yellow
201) 5,5 parts polyvinyl butyral resin (S-LEC BX-1, manufactured by Sekisui Chemical)
4.5 parts methyl ethyl ketone/toluene (weight ratio 1
/1) 89.0 parts Magenta ink Magenta disperse dye (C.I. Dispe.
Same as yellow ink except that rseRed 60) was used.

Cyan disperse dye (C.I.Solvent) is used as cyan ink dye.
Same as yellow ink except that Blue63) was used.
A heat-resistant slip layer (1 μm thick) was formed on the back surface of the ink composition by gravure coating, and an adhesion improving layer (0.5 μm thick) made of polyurethane resin was formed on the surface.
m) is coated with yellow, magenta and cyan in the order of 15cm in width so that the coating amount is about 3g/rf.
A thermal transfer sheet containing sublimable dye layers of three colors was formed by repeatedly coating and drying the dye layer.

Layering the sublimation thermal transfer sheet on the surface of the card base material,
Thermal energy was applied by a thermal head connected to electrical signals obtained by color-separating the facial photograph, and sublimation transfer was performed in the order of cyan, magenta, and yellow to form a full-color facial photograph.

Next, a release layer ink having the following composition was coated on the surface of the same polyester film as described above at a rate of 1 g/rrr based on solid content by a gravure coating method and dried to form a release layer.

Toyosato Sasatsu 2 acrylic resin 20 parts Methyl ethyl ketone 100 parts Toluene
100 copies Next, the following ink was coated on the surface of the release layer using a gravure coating method at a coating amount of about 3 g/rrr and dried to form a heat-melt ink layer, thereby forming a heat-melt type thermal transfer sheet. It was created.

Acrylic/vinyl chloride/vinyl acetate copolymer resin
20 parts carbon black 10 parts toluene
35 parts methyl ethyl ketone
35 copies The thermal transfer sheet was placed on the image margin of the card on which the facial photograph was formed, and symbols images such as numbers, characters such as Chinese characters, and bar codes were formed.

A protective layer having the following composition is placed on the surface of a 4.5 μm thick polyester film with a heat-resistant slip layer formed on the back side and an adhesion improving layer (thickness 0.1 μm) made of polyester resin on the surface. 4 on solid content basis using commercial ink.
A protective layer was formed by coating and drying using a gravure coating method at a ratio of g/rrr. Acrylic resin (manufactured by Mitsubishi Rayon ■, BR-83)
20 parts transparent red pigment
0.01 part polyethylene wax
1 part methyl ethyl ketone
50 parts toluene 50 parts Next, on the surface of the above protective layer, an adhesive layer ink of the following composition was applied at a ratio of Ig/rrr based on solid content and dried to form an adhesive layer, and a protective layer thermal transfer sheet was formed. Shaped.

Acrylic/vinyl chloride/vinyl acetate copolymer (manufactured by Showa Ink@, HS-32G) 20 parts Methyl ethyl ketone 100 parts Toluene
100 copies Next, the protective layer was transferred by a thermal transfer method onto the surface of the facial photograph obtained above using the protective layer thermal transfer sheet to obtain a card of the present invention. Even after the photo was edited and a protective layer was applied with lacquer, it was clear that the photo had been tampered with. Examples 2 to 5 A protective layer thermal transfer sheet was prepared by using the following photosensitive materials in place of the pigment added to the protective layer of Example 1, and a card according to the present invention was obtained in the same manner as in Example 1 except for the following. Ta.

The protective layer of the card of Example 2 appears pink to the naked eye, while the protective layers of the cards of Examples 3 to 5 are colorless to the naked eye. The card of Example 3 has a protective layer that shines blue-white and can be clearly recognized under a black light, the protective layer of the card of Example 4 can be recognized as a black shade under a black light, and the card of Example 5 can be recognized by infrared detection. It can be identified using instruments. It was difficult to tamper with any of the above cards.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating a cross section of a card of the present invention, and FIG. 2 is a diagram diagrammatically explaining a cross section of a protective layer thermal transfer film used in the present invention. :Card base material:Text:Protective layer 7゜:Transparent layer:Base film:Face photo:Touch 1iH:Center core:Magnetic recording layer:Peeling layer Procedural amendment (voluntary) Commissioner of the Japan Patent Office February 7, 1990 Palace 1. 2, 3, 4. Indication of the case Patent application No. 1-299776 Name card of the invention Person making the amendment Relationship to the case Patent applicant 162-01 Address 1-1-1 Ichigaya Kaga-cho, Shinjuku-ku, Tokyo
Name (289) Dai Nippon Printing Co., Ltd. Representative Yoshitoshi Kitajima

Claims (3)

[Claims] (1) In a card in which information such as images and characters are formed on the surface of a card base material, and a transparent protective layer is provided on at least a part of the surface of this information via an adhesive layer as necessary,
A card characterized in that the adhesive layer and/or the protective layer contain a photosensitive material that does not substantially hide the information. (2) The card according to claim 1, wherein at least the image is formed by a sublimation transfer method. (3) The card according to claim 1, wherein the photosensitive material is a transparent pigment, dye, fluorescent dye, infrared absorber, optical brightener, or ultraviolet absorber.