JPH1191268A - Card material for cash card or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a harmful gas from arising at the time of being burnt by a method wherein base materials having a specified size and comprising a plurality of polyester films of a proper thickness, are heat-pressed and bonded with a bonding layer comprising polyethylene between respective base materials, and are formed into a specified dimension. SOLUTION: Among base material 1-4 comprising polyester, the base materials 2, 3 are opaque colored, preferably white polyester films of which the thicknesses are respectively approx. 250 μm, and for the base materials 1, 4, a transparent polyester film of which the thickness is approx. 50 μm is used. 1a, 2a, 2b, 3a, 3b, 4a are bonding layers of a thickness of approx. 30 μm, which are formed by laminating a polyethylene film on the bonding surfaces of respective base materials 1-4, and when a card material is formed by polymerizing and heat-pressing the base materials 1-4, the thickness is made approx. 760 μm. Also, normally, for the base materials 2, 3, a required printing has been applied in advance on the external surfaces to form them into a card.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card for creating a card such as a cash card or a credit card.
This is related to lumber materials.

[0002]

2. Description of the Related Art Conventionally, a card material such as a cash card or a credit card has a thickness of 280, as shown in FIG.
μm opaque and colored vinyl chloride sheet or film 1
2, 13 and the film or sheet 12, 13 having a thickness of 100 μm.
The same material as above, but four transparent sheets or films 11 and 14 are stacked and heated and pressurized, and the upper or lower contacting sheet or film is bonded to form a JIS standard thickness of 760 μm.
Has been created.

The reason for adopting such a laminated structure is that one of the sheets or films 12 and 13 is used as a base material of a thin card (such as a telephone card), and a laminate of the two sheets is used as a thick card (such as a telephone card). In order to be able to use it as a base material for cash cards), and before applying the required printing to the outer surfaces of the laminated sheets or films 12 and 13 by offset printing, This is for forming a thin film sheet or 11, 14 as a print protection layer.

[0004] However, when incinerated, vinyl chloride generates dioxin which is highly toxic and is known as a carcinogen, which not only causes environmental pollution but also has a possibility of adversely affecting the human body.

[0005] On the other hand, in view of the above-mentioned problems of the vinyl chloride resin card material, there has been a strong demand for using a polyester sheet or film as a substitute for the vinyl chloride resin card material. Unlike the resin film, the polyester film has a drawback that the polyester films do not adhere to each other, and thus cannot be used for this type of card material.

[0006]

DISCLOSURE OF THE INVENTION In view of the above-mentioned prior art, the present invention is to form a polyester sheet or film which does not adhere to each other into an adhesive laminate structure according to the present invention, and form the card on a card such as a cash card. It is an object of the present invention to provide a card material for producing various cards such as a cash card which does not generate a highly toxic substance such as dioxin even after incineration. It is assumed that.

[0007]

SUMMARY OF THE INVENTION The object of the present invention, which has been made to solve the above-mentioned problems, is to provide a card material according to the present invention which comprises a base material consisting of a plurality of polyester films having a predetermined size and an appropriate thickness. It is characterized by being bonded by heating and pressing between base materials via an adhesive layer of polyolefin resin.

[0008] Thus, the adhesive layer in the present invention is formed by laminating polyethylene on both sides of the base material disposed inside and the inside surface of the base material disposed outside, of the base material composed of a plurality of polyester films. -It is desirable to form it.

Further, it is preferable that the number of the base materials composed of a plurality of polyester films is four, and that the two base materials disposed on the inner side are thicker than the two base materials disposed on the outer side. . For example, the two substrates arranged on the inner side have a thickness of 250 μm, and the substrates arranged on the outer side have a thickness of 50 μm, considering the thickness of the adhesive layer, The finished thickness should be 760 μm.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged sectional view of an example of the present invention.

In the figure, reference numerals 1, 2, 3 and 4 denote substrates made of a polyester film, and substrates 2 and 3 are opaque colored and preferably white polyester films each having a thickness of about 250 μm. As the substrates 1 and 4, transparent polyester films each having a thickness of 50 μm are used. 1a, 2a, 2b, 3a, 3b, and 4a are adhesive layers formed by laminating a polyolefin-based resin film, for example, a polyethylene film on the bonding surface of each of the substrates 1, 2, 3, and 4. The thickness of the adhesive layer is about 30 μm. At least the adhesive layers 1a, 2a, 3b, 4a are made of a transparent polyolefin resin film, for example, a polyethylene film, and the bases 1, 2, 3, 4 are polymerized. Then, it is heated and pressed so that the thickness becomes approximately 760 μm when formed into a card material. In addition, the above-mentioned adhesive layers 1a, 2a, 2b, 3a, 3b,
4a is formed by applying an anchor coat to the base materials 1, 2, 3, and 4 and extruding and laminating a polyethylene film thereon. Usually, the base materials 2 and 3 are preliminarily printed on their outer surfaces in order to form a card.

In the above, the reason why the thickness of the substrates 2 and 3 is about 250 μm is to enable each of the substrates 2 and 3 to be wound into a relatively small diameter as a film roll. Therefore, if the bases 2 and 3 are formed further from the beginning, the bases 2 and 3 are formed in a sheet shape, so that it is difficult to wind them into a small-diameter roll, and the handling convenience such as storage and transportation is lacking. This is because one of the base materials 2 or 3 can cope with a predetermined thickness of a thin card such as a card or a ticket card.

The card material of the present invention constructed as described above uses a polyester film as a base material and has an adhesive layer for bonding the respective base materials together with a laminate of a polyolefin resin such as polyethylene. Therefore, even if it is formed into a card such as a cash card and then incinerated when it becomes unnecessary, dioxin can be removed as in a conventional card material using a vinyl chloride sheet or film. There is no danger of this. This is because polyethylene terephthalate, a polyester film used as a base material, is used for so-called PET bottles and is considered to be highly safe.
This is because the film is biaxially stretched. In addition, since this polyester film is tough and excellent in dimensional stability, and also excellent in electrical properties, cold resistance and chemical resistance, it can be used as a base material to obtain a very high quality card material. Can be obtained.

[0014]

The present invention is as described above, and the card material of the present invention comprises a substrate made of a plurality of polyester films having a predetermined size and an appropriate thickness, and polyethylene between the substrates. Since it is formed by applying heat and pressure through an adhesive layer and formed to a predetermined size, there is no risk of generating harmful gas even if it is incinerated after forming it on a card. It is suitable as a card material which replaces the card material used in the above.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of an example of a card material of the present invention.

FIG. 2 is an enlarged sectional view of an example of a conventional card material.

[Explanation of symbols]

 1,2,3,4 Polyester film substrate 1a, 2a, 2b, 3a, 3b, 4a Polyethylene adhesive layer

Claims (4)

[Claims] 1. A cash car comprising a plurality of polyester films each having a predetermined size and an appropriate thickness, which are bonded by heating and pressing between the respective substrates via an adhesive layer of a polyolefin resin. Material for card such as card. 2. The card material according to claim 1, wherein the adhesive layer is formed by laminating a polyolefin-based resin film on both sides of the substrate disposed inside and on the inner surface of the substrate disposed outside. . 3. The method according to claim 1, wherein the number of the plurality of base materials is four, and the two base materials disposed inside are thicker than the two polyester films disposed outside. -Wood material. 4. A base material disposed outside a card material, a polyolefin resin film laminated on an inner surface of the base material, and two base materials disposed inside the card material. The transparent material is used for the polyolefin resin film laminated on the outer surface of the material, and the outer surface of the inner substrate is appropriately printed before bonding.
3. The card material according to any one of (1) to (3).