JP2000260019A - Card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card which has high reliability including strength and heat resistance, excellent embossing processability and does not general such problem of hydrogen chloride and dioxin at the time of incineration disposal after use by using a base material formed by laminating polymer alloy sheets of polycarbonate and polyolefin having high heat resistance on both surfaces of a noncrystalline polyester sheet. SOLUTION: The noncrystalline polyester sheet 1 is a noncrystalline polyester resin PET-G and is provided by copolymerizing terephthalic acid, cyclohexane dimethanol and ethylene glycol. The control of glass transition temperature is made possible by changing the compounding ratio of the cyclohexane dimethanol and the ethylene glycol. The polymer alloy sheets 2, 3 of the polycarbonate and the polyolefin having the high heat resistance are the polymer alloy of polycarbonate consisting essentially of bisphenol A and polyethylene, polypropylene, polybutyrene, etc., alone or their mixture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card such as a cash card, a credit card, an ID card (identification card), a membership card, a prepaid card, and more specifically, there is a possibility that the card is stored at a high temperature. The present invention relates to a card which does not deform even when used for home electric appliances such as a vehicle or a computer, retains the functions required of the card, and is more easily discarded at the time of disposal after use. .

[0002]

2. Description of the Related Art Conventionally, embossed magnetic recording media have been widely used in the fields of cash cards, credit cards, ID cards and the like. As a base material of the card, a polyvinyl chloride (PVC) resin or a vinyl chloride / vinyl acetate copolymer is mainly used, and in particular, a polyvinyl chloride resin is generally used. Polyvinyl chloride resin is excellent in physical mechanical properties and embossability of a character portion, and is still widely used as a perfect substrate for a card.

However, in recent years, magnetic recording media are not limited to the fields of cash cards, credit cards, ID cards, and the like. Striped magnetic recording media in which a contact IC module is embedded, that is, IC cards with a magnetic stripe, There are various types such as a non-contact IC card with a magnetic stripe incorporating an antenna and an IC module, or a card having all of them.

[0004] Examples of the application include an electronic wallet, a commuter pass, a telephone card, a license, an on-board card, and the like.
There is a demand for higher reliability including strength such as flexibility, scratch strength, and tensile strength, as well as resistance such as storage stability, heat resistance, and chemical resistance, as compared with conventional card base materials. Further, the polyvinyl chloride resin has a problem in disposal after use, particularly, generation of hydrogen chloride gas at the time of incineration, damaging the incinerator and shortening its life. Also, although the relationship with dioxin has not been clarified, in this regard, countries such as Germany and Northern Europe have been actively pursuing the removal of PVC, and in the construction materials and industrial materials fields in Japan. In that flow.

[0005] A general method of manufacturing a magnetic card with a magnetic stripe such as a cash card uses a white polyvinyl chloride resin as a base material, and prints the base material by a known printing method such as offset printing, gravure printing, or screen printing. After printing by the method, after laminating a highly transparent polyvinyl chloride resin sheet on both sides, the magnetic tape is transferred, heat fusing with a heating press machine, the printed base material, highly transparent poly The vinyl chloride resin sheet and the magnetic tape are integrated and punched out with a mold of a predetermined size to form a card shape.
Although the transferred magnetic tape (magnetic stripe) is raised from the card surface after the transfer and has a level difference, the magnetic tape (magnetic stripe) is embedded by thermal fusion with a heating press machine and becomes flush with the card surface.

By the way, the condition of the card surface is JIS-
X6301-4.2.6 defines the following. "6.35m from each side of the magnetic stripe
In the region m, there should be no surface discontinuity which may impair normal writing of information on the magnetic stripe or normal reading of information recorded on the magnetic stripe.
In addition, in the case of type II, there should be no sharp part of 0.05 mm or more within a range of 24 mm or more from the bottom of the card.・ ・
・ "

The role of a magnetic stripe in a magnetic card is to record unique data possessed by an individual and to read and write the unique data when used. Therefore, if the magnetic stripe is not flush with the surface of the card, the edge of the magnetic stripe is damaged or lost when the card is carried or repeatedly used by a reader / writer, and the role of the magnetic stripe is fulfilled. There is a danger that it will result in an unusable magnetic card.

In general, polyvinyl chloride resin, which is widely used as a base material of a card, has a drawback in physical properties such as low heat resistance. About 60 ° C for polyvinyl chloride resin
Therefore, it is considered that it is not suitable for applications used in a high-temperature region, for example, for home appliances and vehicles. Furthermore, the use of polyvinyl chloride resin is not preferred due to problems at the time of disposal and the flow of PVC removal.

Therefore, there is a concept of using a halogen-free thermoplastic resin such as a polyethylene resin, a polypropylene resin, a polyester resin, a polycarbonate resin, and a polyacryl resin as the base material of the card. These resins can be used alone to form a card in the same manner as a polyvinyl chloride resin, but the physical properties of the card are inferior to those of the polyvinyl chloride resin and require some contrivance.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has higher reliability including strength and heat resistance than a polyvinyl chloride resin as a card base material. Another object of the present invention is to propose a card using a base material which has excellent suitability for embossing, does not generate hydrogen chloride upon incineration disposal after use, and has no problems of hydrogen chloride or dioxin.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a substrate having high heat resistance and suitability for embossing, wherein a polymer alloy sheet of polycarbonate and polyolefin having high heat resistance is laminated on both sides of an amorphous polyester sheet. This is a card characterized by using. Further, the present invention is the card according to the above-mentioned invention, wherein the card has a function of recording information on the base material.
According to the present invention, in the card according to the present invention, the function of recording the information is a function of recording information of a magnetic recording layer, an IC module, and the like.

The present invention also provides the card according to the present invention, wherein the amorphous polyester sheet is a copolymer of terephthalic acid, cyclohexanedimethanol and ethylene glycol. The present invention also provides a card according to the present invention,
The amorphous polyester sheet has a thickness of 0.24 to 0.6.
5 mm and a glass transition temperature of 80 ° C. or higher.

The present invention also provides the card according to the present invention, wherein the polymer alloy sheet of the high heat-resistant polycarbonate and the polyolefin comprises a polycarbonate having bisphenol A as a main component and a polyethylene;
A card which is a polymer alloy with a simple substance or a mixture of polypropylene, polybutylene and the like.
Further, the present invention provides the card according to the present invention, wherein the polymer alloy sheet of the high heat-resistant polycarbonate and polyolefin has a thickness of 0.05 to 0.25 m.
m.

Further, the present invention provides the card according to the present invention, wherein the amorphous polyester sheet and the polymer alloy sheet of polycarbonate and polyolefin having high heat resistance are each formed into a sheet by an extrusion method. is there.

[0015]

Embodiments of the present invention will be described below. FIG. 1 is an explanatory view showing a cross section of an embodiment of a card according to the present invention. As shown in FIG. 1, a card according to the present invention has a base material in which polymer alloy sheets (2) and (3) of polycarbonate and polyolefin having high heat resistance are laminated on both sides of an amorphous polyester sheet (1). Is used.

The amorphous polyester sheet constituting the substrate in the present invention is made of an amorphous polyester resin PET-G.
It is. The amorphous polyester resin PET-G is produced by copolymerizing terephthalic acid with cyclohexanedimethanol and ethylene glycol. And
The glass transition temperature can be controlled by changing the mixing ratio of cyclohexanedimethanol and ethylene glycol.

When the polyester sheet is amorphous, the suitability for embossing is good, and the processed card does not warp or crack.

The amorphous polyester sheet of the present invention has a thickness of 0.24 to 0.65 mm and a glass transition temperature of 80 ° C. or higher. If the thickness of the amorphous polyester sheet is 0.24 mm or less, the thickness of the laminated polymer alloy sheet of polycarbonate and polyolefin will be 0.25 mm or more, and the card will have poor embossing suitability. On the other hand, if the thickness of the amorphous polyester sheet is 0.65 mm or more, the thickness of the polymer alloy sheet to be laminated must be 0.05 mm or less, resulting in poor heat resistance of the card. If the glass transition temperature of the amorphous polyester sheet is 80 ° C. or less, the heat resistance of the card becomes inferior.
It is preferable that the temperature is not less than the degree.

The polymer alloy of polycarbonate and polyolefin having high heat resistance in the present invention is characterized in that it is a polymer alloy of polycarbonate containing bisphenol A as a main component and a simple substance or a mixture of polyethylene, polypropylene, polybutylene and the like. Things. The use of a sheet made of polycarbonate alone is preferable in terms of high heat resistance, but is not preferable in terms of embossing suitability. Therefore, when a polymer alloy sheet obtained by alloying a polyolefin with a polycarbonate is used, it is possible to maintain embossing aptitude while maintaining high heat resistance.

Further, the polymer alloy sheet of polycarbonate and polyolefin having high heat resistance according to the present invention is characterized in that it has a thickness of 0.05 to 0.25 mm. When the thickness is 0.05 mm or less,
The heat resistance of the card was inferior, and the thickness was 0.1 mm.
If it is 25 mm or more, the embossability of the card will be poor.

The formation of the amorphous polyester sheet and the polymer alloy sheet of polycarbonate and polyolefin having high heat resistance in the present invention is preferably carried out by an extrusion method or a calendering method. This is because the material of these sheets is suitable for the extrusion method or the calendering method due to its physical properties, but has an advantage that the sheet can have functionality by processing such as multilayer extrusion. .

Next, as a card manufacturing method using a card base material in the present invention, there is a melt lamination method using a heating press machine. In the melt lamination method, a transparent protective sheet is laminated on both sides of a printed base material, and at that time, the types of the protective sheets on both sides may be different. The melt lamination method is a method in which a base material on which a protective sheet is laminated is sandwiched between mirror plates which are slightly larger, and then integrated with the base material of the card by a hot melt press. The mirror plate used at this time may be a nickel-chromium-plated copper plate, a polished surface stainless plate, a polished aluminum plate, or the like.

The printing on the base material can be performed by printing characters or patterns by the same method as that of paper or plastic film, that is, by a known printing method such as offset printing, screen printing, or gravure printing. it can. After the hot-melt press, the base material of the card integrated with the protective sheet is peeled off from the mirror plate, and punched into a card shape by punching with a single blade or a male / female mold. The card can also be provided with a magnetic recording layer, on one or both sides of the card,
Conventionally, a method of transferring a thermal transfer type magnetic tape or printing a magnetic recording layer directly on a substrate is used.

Normally, after a card is formed, a floating character is embossed by an embosser, and the character is colored by tipping the character with a thermal transfer foil, or magnetic information is encoded on a magnetic recording layer. Transfer your face photo, barcode, etc. to finish the card. When a character and picture print layer is provided on this card,
A protective layer can also be provided for the purpose of improving the resistance of the picture printing layer such as abrasion.

[0025]

Next, the present invention will be described in detail with reference to examples. <Embodiment 1> FIG. 2 is an explanatory view showing a cross section of the card of Embodiment 1. A picture printing layer (10) having a film thickness of 1 μm was provided on one side of a white PET-G sheet (5) (manufactured by Mitsubishi Plastics, Inc .: PET-G, Diafix PG-W) having a thickness of 540 μm by an offset printing method. And a 100 μm-thick transparent polycarbonate and polyolefin polymer alloy sheet onto which a magnetic tape (8) has been transferred (6).
And on the other side, a thickness of 100 μm printed with a character print layer (9)
m, a polymer alloy sheet (7) of a transparent polycarbonate and a polyolefin is laminated, sandwiched between stainless steel plates having a smooth surface, heat-bonded at 120 ° C. for 20 minutes, cooled and solidified, and then punched into a card shape. Card.

The light resistance and chemical resistance of the card of Example 1 were higher than required levels. Particularly, the heat resistance was high without heat deformation in an oven at 100 ° C. It can be said that the card for in-vehicle use has no deformation even if placed in a car in the middle of summer and does not use a vinyl chloride resin. Also, it was excellent in embossing suitability when used for credit cards and the like.

<Embodiment 2> FIG. 3 is an explanatory view showing a cross section of a card of Embodiment 2. 300μm thick white PE
TG sheet (11) (manufactured by Mitsubishi Plastics, Inc .: PET-
G, Diafix PG-W)
On one side of the core, a picture printing layer (1
4) is provided with a film thickness of 3 μm, and a 100 μm thick transparent polycarbonate / polyethylene / polypropylene polymer alloy sheet (12) to which a magnetic tape (15) is transferred.
And a character printing layer (16) printed on the other surface.
After the faces of the character printing layer (16) of the transparent polycarbonate / polyethylene / polypropylene polymer alloy sheet (13) of 00 μm are overlapped, sandwiched by a stainless steel plate having a smooth surface, and pressure-bonded and heat-fused at 130 ° C. for 20 minutes. After being cooled and solidified, it was punched into a card shape to form a card.

The light resistance and chemical resistance of the card of Example 2 were higher than required levels. Particularly, the heat resistance was high without heat deformation in an oven at 100 ° C. The card for in-vehicle use does not deform even if placed in a car in the middle of summer, and it does not use vinyl chloride resin. Also, it was excellent in embossing suitability when used for credit cards and the like.

<Comparative Example 1> FIG. 4 is an explanatory view showing a cross section of a card of Comparative Example 1. Thickness 100 in Example 1
Instead of a polymer alloy sheet (6), (7) of a transparent polycarbonate and polyolefin having a thickness of 1 μm,
A card was formed in the same manner as in Example 1 except that a transparent polyvinyl chloride resin sheet of 00 μm (manufactured by Mitsubishi Plastics, Inc .: vinyl foil) (41) or (42) was used.

<Comparative Example 2> FIG. 5 is an explanatory view showing a cross section of a card of Comparative Example 2. Thickness 300 in Example 2
Instead of a μm white PET-G sheet (11) (Mitsubishi Resin Co., Ltd .: PET-G, Diafix PG-W), an ABS sheet (Asahi Kasei Kogyo Co., Ltd .: Stylac) (51) was used. A card was formed in the same manner as in Example 2 except that it was used.

The cards of Comparative Examples 1 and 2 are 100
It was severely deformed in an oven at ℃, and was not usable as a magnetic card. In addition, the card of Comparative Example 2 did not show embossing suitability when used for a credit card or the like. As described above, the cards of Comparative Examples 1 and 2 do not have heat resistance on the base material itself, and therefore have a problem that when used in a room or the like where the temperature is high, they are significantly deformed and cannot withstand use. I have. Further, since the card of Comparative Example 2 does not have embossing suitability for the base material itself, there is a problem that embossing cannot be performed when used for a credit card or the like. Furthermore, since the card of Comparative Example 1 uses a vinyl chloride resin, if it is incinerated at the time of disposal after use, it has a problem that hydrogen chloride gas is generated and the furnace is damaged, which is not excellent in disposability. I have.

[0032]

The present invention is directed to a card using a substrate having high heat resistance and suitability for embossing in which a polymer alloy sheet of polycarbonate and polyolefin having high heat resistance is laminated on both sides of an amorphous polyester sheet. Therefore, it has higher reliability including strength and heat resistance than polyvinyl chloride resin, has excellent embossing suitability, does not generate hydrogen chloride at the time of incineration disposal after use, and has problems with hydrogen chloride and dioxin. A card without problems.

Further, since the present invention is a card having a function of recording information on the base material, the card has higher reliability including strength and heat resistance than polyvinyl chloride resin,
This card has excellent embossing suitability, does not generate hydrogen chloride during incineration disposal after use, has no problems with hydrogen chloride or dioxin, and has a function of recording information.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cross section of an embodiment of a card according to the present invention.

FIG. 2 is an explanatory diagram showing a cross section of the card according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a cross section of a card according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a cross section of a card of Comparative Example 1 of the present invention.

FIG. 5 is an explanatory view showing a cross section of a card of Comparative Example 2 of the present invention.

[Explanation of symbols]

1, 5, 11,... Amorphous polyester sheet 2, 3, 6, 7, 12, 13,... Polymer alloy sheet of polycarbonate and polyolefin 8, 15,... Magnetic tape 9, 16, ... Character printing layer 10,14 ... Picture printing layer 41,42 ... Polyvinyl chloride resin sheet 51 ... ABS sheet

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C005 MA11 MA28 MB01 MB02 MB08 NB13 QC12 QC15 RA04 RA09 RA10 RA11 4F100 AK03B AK03C AK04B AK04C AK07B AK07C AK09B AK09C AK41A AK41J AK42B05 AK42JAKB AK42BAKK BA07 BA10B BA10C BA10D BA13 BA15 EC03 EH17 GB41 GB71 HB31 JA05A JA12A JA20A JG06D JJ03 JJ03B JJ03C JL00 JL01 YY00A 5B035 AA00 AA04 AA07 AA08 BA03 BA05 BB02 BB09 BC00 FA03 CA01 CB01 FA02 CA01 CB01

Claims (8)

[Claims] The present invention is characterized in that a substrate having high heat resistance and suitability for embossing is used, in which a polymer alloy sheet of polycarbonate and polyolefin having high heat resistance is laminated on both sides of an amorphous polyester sheet. card. 2. The card according to claim 1, wherein a function of recording information is provided on the base material. 3. The card according to claim 2, wherein the function of recording the information is a function of recording information on a magnetic recording layer, an IC module, and the like. 4. The card according to claim 1, wherein said amorphous polyester sheet is a copolymer of terephthalic acid, cyclohexanedimethanol and ethylene glycol. . 5. The method according to claim 1, wherein the amorphous polyester sheet has a thickness of 0.5.
5. The card according to claim 1, wherein the glass transition temperature is 24 to 0.65 mm and the glass transition temperature is 80 degrees or more. 6. The polymer alloy sheet of a polycarbonate and a polyolefin having high heat resistance is a polymer alloy of a polycarbonate containing bisphenol A as a main component and a simple substance or a mixture of polyethylene, polypropylene, polybutylene or the like. Claim 1 to
The card according to claim 5. 7. The polymer alloy sheet of a polycarbonate and a polyolefin having high heat resistance has a thickness of 0.5 mm.
The thickness is 0.5 to 0.25 mm.
The card according to claim 6. 8. The sheet according to claim 1, wherein the amorphous polyester sheet and the polymer alloy sheet of polycarbonate and polyolefin having high heat resistance are each formed by extrusion. Card described in.