JPH03159794A - Card - Google Patents

Abstract

PURPOSE:To obtain a card further excellent in indelible properties and forgery preventing properties by forming a pattern not substantially concealing data to the surface or interior of a 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 and a transparent protective layer 4 is provided to the surface of at least a part of these data, a pattern not substantially concealing the above mentioned data is formed to the surface or interior of the protective layer 4. For example, the pattern 5 is formed to the surface of the protective layer 4 or formed between the protective layer 4 and an adhesive layer 6 or further formed between two protective layers 4, 4'.

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 ID cards and the like, the image of the face is most important along with the text 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 a base film, is layered on a card base material, and a thermal head is heated from the back side of the sublimation transfer sheet 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, all 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 made by the above method have excellent flatness, tamper-proofing properties, and counterfeiting-proofing properties, especially since the face photograph is formed by dyeing the card base material, but they do not require solvents. It cannot be completely ruled out that there is a risk that the protective layer may be removed using , acid, base, etc., resulting in falsification or forgery of facial photographs and other information.

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 problems) The above objects are achieved by the present invention as described below.

That is, the present invention provides a card in which information such as a facial 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, in which a transparent protective layer is provided on the surface or inside of the protective layer. This card is characterized by having a pattern that does not substantially hide the above information.

(For A) In the case of attempting to falsify or forge a facial photograph, etc. by forming a pattern on the surface or inside of the protective layer that covers various information on the card that does not substantially hide the above information. , Since it is difficult to restore these designs, even if the card is tampered with or forged, it will be easily discovered, and therefore it is difficult to tamper with or forge the card. (Preferred Embodiments) Next, the present invention will be explained 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, and at least part of the surface of the information is formed as shown in FIG. In a card provided with a transparent protective layer 4, the protective layer 4
A pattern 5 that does not substantially hide the above information on the surface or inside of the
(See FIGS. 2 to 4).

FIG. 2 is a diagram illustrating a cross section of an example of a card according to the present invention, and in this example, a pattern 5 is formed on the surface of the protective layer 4. In the example shown in the third figure, the pattern 5 is formed between the protective layer 4 and the adhesive layer 6, and in the example shown in the fourth figure, the pattern 5 is formed between the two protective layers 4 and 4'. It is formed.

The card base l used in the above-mentioned card of the present invention may be made of conventionally known polyester, borovinyl chloride, or It may be made of resin, metal, etc., but is not particularly limited. The example shown in the first diagram is a card base material 1 which is preferable in the present invention.
This example shows a structure in which transparent polyvinyl chloride layers 8 and 8' are laminated on both sides of a center core 7 made of polyvinyl chloride containing a white pigment. At least the transparent vinyl chloride layer 8, 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 O. ■～10
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, while if it is too large, the dye-receiving surface will lack rigidity and become soft, and the printed image will bleed during storage. This is not preferable because a clear image cannot be obtained.

The dye-receiving surface 8 may optionally contain colored pigments, white pigments, extender pigments, fillers, ultraviolet absorbers, antistatic agents, heat stabilizers, antioxidants, optical brighteners, etc. I can do it.

Such a card base material 1 may have a necessary magnetic recording layer 9, an embossed pattern (not shown), other printed pattern, optical memory, IC memory, bar code, etc. formed on its surface 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 face 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 such character information 3 using a hot melt ink type thermal transfer sheet that can print high-density black. 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 4 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 4 may be provided on the entire surface of the recorded information, or may be provided on a portion thereof. Although these protective layers 4 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 and at least one 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. It can be shaped simultaneously with two thermal transfer sheets.

The present invention is characterized in that the above-mentioned card has a pattern formed on the surface or inside of the protective layer that does not substantially hide the above-mentioned information, in order to further improve its anti-tampering properties and anti-counterfeiting properties. It is said that The above-mentioned pattern is preferably provided at least adjacent to the protective layer as described above. These patterns may be any pattern as long as they do not hide the recorded information covered by them, such as company names, symbol marks, landscapes, abstract paintings, background patterns, holograms, etc., and are not particularly limited. It may be a transparent colored layer or a uniform layer having the functions described below. Therefore, in the present invention, these uniform layers are also referred to as patterns for convenience. In order to form a pattern that can be observed with the naked eye without concealing recorded information, it is sufficient to form the pattern with relatively low density using highly transparent pigments, dyes, fluorescent dyes, etc. On the other hand, in the case of a pattern that cannot be recognized with the naked eye but can be recognized with infrared rays, ultraviolet rays, etc., the violet-infrared absorber, ultraviolet absorber, etc.
It can be formed using optical brighteners, etc. It is also possible to form a pattern using a dye or the like (oxygen indicator) that develops color when it comes into contact with oxygen; in this case, by forming the pattern on the inside of the protective layer,
The pattern develops color when the protective layer is destroyed.

As the method for forming the above-mentioned pattern, it is preferable to select an appropriate method depending on the method for forming the protective layer. For example, when the protective layer is formed by film lamination, a pattern may be printed on the film in advance using an ink containing a pattern forming agent as described above. In addition, if the shape is to be determined by a coating method, a pattern may be printed on the surface of the protective layer after it is formed.

A preferred method in the present invention is a pattern forming method using a thermal transfer method. That is, as an example, FIGS. 5 to 7
By using a protective layer thermal transfer sheet as shown in the figure,
It is very advantageous in terms of process because a pattern can be applied at the same time as the protective layer is formed.

The protective layer thermal transfer sheet shown in FIG. 5 has a peeling layer 11 formed on the surface of a base film 10 as necessary, and the pattern 5, protection layer N4, and adhesive layer 6 are sequentially formed thereon. The card shown in the second figure is provided by transferring the recorded information onto the surface of the card using a thermal transfer method.

The protective layer thermal transfer sheet shown in FIG. 6 is one in which a peeling layer l1 is formed on the surface of a base film 100 as required, and a protective layer M4, a pattern layer 5 and an adhesive H6 are sequentially formed thereon. By transferring the recorded information on the surface of the card by using the card shown in the third figure. provided.

In the protective layer thermal transfer sheet shown in FIG. 7, a peeling IJNxx is formed on the surface of the base film 10 as necessary, and a protective layer 4, a pattern layer S, a protective layer 4', and an adhesive layer 6 are sequentially formed thereon. The card shown in the fourth figure is provided by transferring recorded information onto the surface of the card using a thermal transfer method.

(Effects) According to the present invention as described above, by forming a pattern that does not substantially hide the information on the surface or inside of the protective layer that covers various information on the card, facial photographs, etc. If you attempt to tamper with or forge a card, it is difficult to restore these designs, so even if you tamper or forge a card, it will be easily discovered, and therefore it is difficult to tamper with or forge a card.

(Example) Next, the present invention will be described 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 combination of 100 parts of compound (degree of polymerization: 800) and 15 parts of white pigment (titanium oxide).

Next, a transparent sheet (thickness O-1
5 mm) was prepared and thermocompression bonded to both sides of the above white core to produce a car P: base material used in the present invention.

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

± and Danjie2ma Disperse dye (Macrolex Yellow 6G, manufactured by Bayer AG, C.I.Disperse Yellow
w 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) as dye
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 (thickness ItLm) was formed on the back surface of the above ink composition by a gravure coating method, and an adhesion improving layer (thickness 0.5 mm) made of polyurethane resin was formed on the surface.
On the surface of a polyester film with a thickness of 4.5 μm, yellow, magenta and cyan were applied in the order of yellow, magenta and cyan to a width of 15 cm.
A thermal transfer sheet containing sublimable dye layers of three colors was formed by repeatedly coating and drying.

Layering the sublimation thermal transfer sheet on the surface of the card base material,
Heat 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, creating a full-color facial photograph.

Next, a release layer ink having the following composition was applied to the surface of the same polyester film as described above at a ratio of lg/nf based on solid content by a gravure coating method and dried to form a release layer.

Acrylic resin 20 parts Methyl ethyl ketone 100 parts Toluene
ioo part 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 described above was placed on the image margin of the card on which the facial photograph was formed, and images of symbols such as numbers, characters such as kanji, and bar codes were formed. Thickness: 4. A heat-resistant slip layer is formed on the back surface, and an adhesion improving layer (thickness: 0.1 μm) made of polyester resin is formed on the surface.
A protective layer was formed on the surface of a 5 μm polyester film by gravure coating using a protective layer ink having the following composition at a rate of 4 g/rrr based on solid content and drying. Statue of Okisato Enoma acrylic resin (manufactured by Mitsubishi Rayon, BR-83)
20 parts polyethylene wax 1 part methyl ethyl ketone
50 parts toluene
50 parts Next, a transparent ground pattern is printed on the surface of the protective layer using gravure ink containing a transparent red pigment to form a pattern layer, and then an adhesive layer ink having the following composition is applied on solid basis. The adhesive layer was coated and dried at a ratio of 1 g/n-r to form a protective layer thermal transfer sheet.

Nagaya Bento IJL Jinzma Acrylic/vinyl chloride/vinyl acetate copolymer (manufactured by Showa Ink ■, HS-32G) 20 parts Methyl ethyl ketone 100 parts Toluene
100 copies Next, a protective layer was transferred onto the surface of the facial photograph obtained above using the above-mentioned protective layer thermal transfer sheet by a thermal transfer method to obtain a card of the present invention. Even after removing the protective layer of this card, modifying the face photo, and applying lacquer to the protective layer, it was clear that the card had been tampered with. Examples 2 to 5 Cards according to the present invention were obtained in the same manner as in Example 1 except that the following inks were used in place of the pattern layer of the protective layer thermal transfer sheet of Example 1 to create protective layer thermal transfer sheets. ．． The pattern of the card of Example 2 is visible, but the pattern of the cards of Examples 3 to 5 is not visible. The card of Example 3 can be clearly recognized under a black light, and the card of Example 4 can be recognized as a black shade under a black light.
The card of Example 5 can be identified with an infrared detector. It was difficult to tamper with any of the above cards.

Example 6 Card base material used in Example 1, sublimation type thermal transfer sheet,
A heat-melting thermal transfer sheet and a protective layer thermal transfer sheet (without a pattern layer) are used to transfer facial photographs, letters, and a protective layer in the same manner, and then a checkered pattern is printed on top of this using a sublimation thermal transfer sheet with low printing energy. Then, a protective layer was transferred thereon again to obtain a card of the present invention having the structure shown in Figure 4. In the case of this card, a thin checkered stripe was visually observed on the face photograph, and it was also difficult to tamper with it.

[Brief explanation of the drawing]

FIGS. 1 to 4 are diagrams for schematically explaining the cross section of the card of the present invention, and FIGS. 5 to 7 are diagrams for schematically explaining the cross section of the protective layer thermal transfer film used in the present invention. It is. 1: Card base material 2: Face photo 3: Characters 4: Protective layer 5: Pattern 6: Magnetic recording layer 7: Center core 8: Transparent layer 9: Magnetic recording layer 1O: Base film 11: Release layer

Claims (7)

[Claims] (1) In a card in which information such as images 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, the above information is substantially formed on the surface or inside of the protective layer. A card that is characterized by a pattern that does not hide the image. (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 design is normally visible. (4) The card according to claim 1, wherein the design is invisible in normal conditions. (5) The card according to claim 1, wherein the protective layer consists of two layers, and the pattern is formed between these protective layers. (6) The card according to claim 1, wherein an adhesive layer is provided between the card base material and the protective layer, and the pattern is formed between the adhesive layer and the protective layer. (7) The card according to claim 1, wherein the pattern is formed of a transparent pigment, dye, fluorescent dye, infrared absorber, optical brightener, ultraviolet absorber, oxygen indicator, hologram, or the like.