JP2001129952A - Card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card having good embossability including small warpage by embossing, high heat resistant deformability having small thermal deformation, laminatability having wide laminating conditions and concealing printability with good affinity to a printing ink. SOLUTION: In the card, coating layers each made of a three-layer structure of an intermediate layer made of a thermoplastic resin film having a thermally deforming temperature of 95 deg.C or higher, a rear layer having compatibility with a core layer made of an amorphous polyester resin sheet and a front layer having good printability are integrally laminated on both surfaces of the core layer in such a manner that the rear layer is opposed to the core layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic card, an IC card, etc. which are excellent in heat deformation resistance, excellent in embossability, excellent in lamination properties, and excellent in concealing printability for concealing a magnetic tape. The present invention relates to a card made of a thermoplastic resin used.

[0002]

2. Description of the Related Art Conventionally, magnetic cards and IC cards in which letters and symbols are three-dimensionally engraved by embossing are often used. For this kind of card, hard polyvinyl chloride which is generally excellent in embossability is applied, and a card in which a core layer and coating layers on both sides thereof are laminated has been widely used.

[0003] Usually, the card has a structure in which various patterns and patterns are printed on the surface of a core layer, a coating layer is laminated thereon, and a magnetic tape is further applied thereon. Has been provided. When put into practical use as a card, the card is embossed and three-dimensionally engraved with characters and symbols.

Heretofore, polyvinyl chloride has been used for this kind of card because it is inexpensive and excellent in embossability. The card made of polyvinyl chloride is excellent in all of printability, heat-sealing lamination properties and punching workability, and has high versatility.

On the other hand, recently, global environmental preservation has been called for, and from the viewpoint of preserving the natural environment and ensuring safety and hygiene, this card is also made of vinyl chloride resin. There is a strong social demand for the use of such a resin, and some proposals have been made to use amorphous polyethylene terephthalate as a card.

[0006]

However, a card made of amorphous polyethylene terephthalate is excellent in printability, heat-sealing lamination property and punching workability as in the case of using polyvinyl chloride as a material. It has excellent characteristics, and it has excellent embossability, in particular, it does not warp when stamping.However, on the other hand, it is inferior in heat deformation resistance as in the case of polyvinyl chloride. If it is left in a high-temperature environment for a long time, such as when it is left, it has the disadvantage of causing thermal deformation.

[0007] In order to solve such a problem, the present applicant has previously adopted 1,4-cyclohexanedimethanol derivative copolymerized polyester as a resin to be used as a material for the card, and has taken advantage of its good embossability. Further, a card resin composition having improved heat distortion resistance by mixing it with a polycarbonate having a high heat distortion temperature has been proposed (JP-A-11-189708). However, in the card using the above composition, the heat-resistant deformation resistance is certainly improved with an increase in the mixing ratio of the polycarbonate, but, on the contrary, the rapid and local elongation at the time of stamping by embossing is proportional to the mixing ratio. Thereby, the embossability, which is that the card is warped in a convex manner toward the surface of the characters or the like, can be reduced, and the good embossability inherent to the 1,4-cyclohexanedimethanol derivative copolymerized polyester can be maintained. Rather, it significantly reduces this.
In other words, a satisfactory degree of satisfaction has not yet been obtained for the purpose of obtaining a card that satisfies both the properties of heat deformation resistance and embossability at the same time.

In order to solve such a problem, the inventor of the present application disclosed in Japanese Patent Application No. 11-259047 a card in which a coating layer was integrated on both sides of a core layer, wherein the core layer was amorphous. The present invention has proposed a card made of a thermoplastic polyester resin sheet, wherein the coating layer is made of a thermoplastic resin film having a heat distortion temperature of 95 ° C. or higher.

The card obtained by the above proposal has good embossability and high heat deformation resistance. According to a subsequent study by the present inventor, the core layer and the coating The appropriate range of lamination conditions by heating and pressurizing the layer is not necessarily wide, and especially when the laminating temperature is set a little higher, there is a problem such as abnormal flow of the core layer at the time of pressurization. It turned out that it required.

On the other hand, recent magnetic cards and IC cards are
In response to the diversification of designs, a concealed printing layer is provided on the entire surface of the card from above the magnetic tape to prevent the magnetic tape from hindering the free design setting and prevent the magnetic tape from being directly visible. Magnetic cards and IC cards in which characters and designs are freely printed on the concealed printing layer have begun to spread.

On the other hand, in the card proposed above, there is a problem that the coating layer on which the magnetic tape is stuck has high affinity for the printing ink, and the adhesion of the printing ink is poor.

The present inventor has further studied under the technical background as described above. As a result, a thermoplastic resin sheet having a high embossing property is used for the core layer, and a heat-resistant heat-resistant thermosetting resin sheet is used for the coating layer. Based on the previous proposal of a laminated structure in which a plastic resin film is disposed and laminated and integrated, if the compatibility of the coating layer with the core layer and the affinity with the printing ink are further improved, excellent embossing is achieved. The present inventors have found that an excellent card having good workability in lamination with the core layer and good concealing printability can be obtained while maintaining processability and heat deformation resistance, and completed the present invention.

That is, the present invention provides embossability,
In order to obtain cards such as magnetic cards, IC cards, etc. having excellent heat deformation resistance, lamination workability and concealment printability, good embossability with less warpage due to embossing, high heat deformation with less heat deformation, It is an object of the present invention to provide a card having both laminating processability under a wide laminating condition and concealing printability having good affinity with a printing ink.

[0014]

In order to achieve the above object, the present invention provides a card in which a coating layer is laminated and integrated on both sides of a core layer, wherein the core layer is made of an amorphous polyester resin sheet. Wherein the coating layer is a laminated film having a three-layer structure of an intermediate layer made of a thermoplastic resin film and a surface layer and a back layer integrated on both surfaces thereof, wherein the intermediate layer is a thermoplastic resin having a heat deformation temperature of 95 ° C. or more. The card, wherein the film, the surface layer and the back layer are amorphous polyester resin films, and the core layer and the back layer of the coating layer are laminated and integrated facing each other. Make a summary.

A preferred embodiment of the present invention is Claim 2
(2) The card according to (1), wherein the intermediate layer of the coating layer is a thermoplastic resin film made of a mixed resin of a combination of two or more selected from polyarylate, polycarbonate, and polyethylene terephthalate.

The card of the present invention has excellent heat deformation resistance,
A coating layer having excellent laminating processability and concealing printability with the core layer is disposed on both sides of the core layer having excellent embossing processability. Yes, with excellent lamination processability,
Excellent concealment printability for concealment of magnetic tape, which is a design problem as a card, and excellent embossing that suppresses warpage during embossing, which is a problem in use, and suppresses thermal deformation in high temperature environments This makes it possible to simultaneously impart heat resistance and heat deformation resistance.

The structure of the card according to the present invention has a laminated structure in which coating layers are arranged on both sides of a core layer. The coating layer has a three-layer structure of an intermediate layer and a surface layer and a back layer integrated on both sides thereof. It is made of a laminated film, and has a structure in which a core layer and a coating layer are laminated and integrated with each other by means of heat fusion or adhesion.

In the present invention, the thermoplastic resin applied to the core layer is an amorphous polyester resin, which enhances the embossability of the entire card. The thermoplastic resin applied to the coating layer is a thermoplastic resin in which the intermediate layer has a heat distortion temperature of 95 ° C. or higher, and the surface layer and the back layer are thermoplastic resins compatible with the core layer. It is a thermoplastic resin having affinity for printing ink.

In the card of the present invention, the reason why the thermoplastic resin applied to each layer is selected as described above is as follows.
In order to maintain the embossability of the core layer at a high level and at the same time increase the heat resistance of the coating layer, the heat deformation resistance of the entire card is effectively secured. In order to improve the laminating processability of the coating layer so that the coating layer can be laminated on the core layer on the side, and to improve the affinity between the surface layer of the coating layer and the printing ink to improve the printing performance of the surface layer. is there.

The film-like coating layer having the three-layer structure of the intermediate layer and the front and back layers is formed by a multilayer extrusion molding method or the like before being laminated with the core layer.

Next, the thermoplastic resin material used for the card of the present invention will be specifically described.

First, as the amorphous polyester applied to the core layer, polyethylene terephthalate (PET) is used.
A part of the ethylene glycol component of 1,4-cyclohexane dimethanol is replaced, 1,4-cyclohexane dimethanol derivative copolymerized polyester is applied,
When the substitution rate of the 1,4-cyclohexanedimethanol is 1
Those with 0 to 70 mol% are applied.

Next, the thermoplastic resin applied to the coating layer, that is, the intermediate layer, and the surface layer and the back layer laminated on both surfaces of the intermediate layer will be described. First, as the intermediate layer, as described above, if the thermoplastic resin has a heat deformation temperature of 95 ° C. or more,
The specific type is not particularly limited, but is preferably a resin selected from polyarylate (hereinafter, referred to as PAR), polycarbonate (hereinafter, referred to as PC), and polyethylene terephthalate (hereinafter, referred to as PET). It is desirable to use a mixed resin of a combination of two or more of the above. The reason is that by forming a mixed resin in which the above-mentioned respective thermoplastic resins are appropriately combined, it is possible to easily maintain the desired deformation property of the coating layer at a desired temperature of 95 ° C. or more while maintaining the desired properties. Because it can be set. In addition, the surface layer and the back layer are required to be thermoplastic resins having compatibility with the core layer as well as thermoplastic resins having good compatibility with the printing ink.
Specifically, the same amorphous polyester resin as the core layer is most suitable for satisfying the above conditions, and the surface layer and the back layer can be shared so that lamination workability with the core layer, and economic efficiency can be achieved. It is advantageous in the point and the like.

Here, the mixed resin applied to the intermediate layer of the coating layer will be described individually. First, PAR is a polycondensation compound of a bisphenol compound and phthalic acid, and is an amorphous resin having a relatively high glass transition point (193 ° C.)
It is suitable for improving the heat resistance of the coating layer and, consequently, the heat deformation resistance of the card. PC is a polycondensation compound of a bisphenol compound such as bisphenol A and phosgene, has lower heat resistance than PAR, has good film workability like PET described later, and has a film like PET. Does not lower heat resistance. Further, PET is compatible with polyarylate and polycarbonate, and can improve the extrudability of the film, and in particular, the laminability between the front and back layers. Amorphous PET obtained by substituting a part of the ethylene glycol component of PET with cyclohexane dimethanol is also applicable.

Furthermore, the combination of each resin in the mixed resin is PAR / PC / PET, PAR / PC, PAR
Any combination of / PET and PC / PET is possible. The mixing ratio of the combination is set so that the heat distortion temperature of the obtained mixed resin composition is 95 ° C. or higher. Should be set so as not to hinder the lamination integration, and to ensure the expected performance of the card obtained by heating and press lamination with the core layer.

Therefore, the mixing ratio of the above resins is PAR
0 to 80% by weight for PC, 0 to 60% by weight for PC, PET
Is in each range of 0 to 60% by weight. In this case, if each of the resins exceeds the upper limit of the range of the mixing ratio, the card is not preferable because the card becomes brittle and the elongation is reduced in the case of PAR, and the card is more likely to be warped by embossing in the case of PC. In addition, in the case of PET, heat deformation resistance is reduced, and does not contribute to prevention of heat deformation in a high temperature environment. Therefore, the mixing ratio of each resin to the whole mixed resin is preferably in the range of 0 to 60% by weight for PAR, 0 to 50% by weight for PC, and 0 to 50% by weight for PET.

The core layer according to the present invention comprises, in addition to the amorphous polyester, a filler such as titanium oxide or talc for imparting a hiding property required for a normal card.
Various additives usually used for cards such as a coloring agent, a reinforcing agent, an antistatic agent, and a flame retardant can be added. It is also possible to mix polycarbonate for the purpose of improving the heat resistance of the card. However, in the case of mixing polycarbonate, an increase in the amount of addition causes an increase in warpage in embossing and a decrease in printability. Therefore, it is desirable to limit the amount of addition to less than 50% by weight.

The front and back layers of the present invention are as follows:
In order to prevent a layer in contact with the glossy plate from sticking to the glossy plate during lamination by heating and pressing with a core layer described below, a release agent is added to at least one of the front and back layers. Is desirable.

The thickness of the card according to the present invention is set in consideration of the fact that the thickness of a generally used card is around 0.6 to 0.8 mm. That is, the thickness of the coating layer is set in a relative relationship with the thickness of the core layer, and is usually kept within a range of 0.05 to 0.2 mm. Further, an intermediate layer constituting the coating layer,
Since the middle layer of the surface layer and the back layer plays an important role in maintaining the heat resistance of the entire card,
When setting the thickness of the coating layer, first, the thickness of the intermediate layer is set with priority, and the thickness is set to 0.03 to 0.1.
It shall be set to a range of 8 mm. If the thickness of the intermediate layer is less than 0.03 mm, the thermal deformation resistance of the entire card is reduced, so that the flatness cannot be maintained in a high-temperature environment.
When the thickness exceeds 18 mm, the thickness of the front and back layers is relatively reduced, and the laminating processability of the coating layer is reduced. Further, the thickness of the core layer is relatively reduced, so that the concealment required for a normal card is required. Not only does the property deteriorate, but it also causes the warpage during embossing to increase. Therefore, the thickness of the coating layer is preferably 0.07 to 0.18 mm, and the thickness of the intermediate layer is preferably 0.05 to 0.16 mm.

In the present invention, as a method for forming the resin sheet used for the core layer and the resin film used for the coating layer, a generally known forming method is used, and the former resin sheet is formed by extrusion molding using a normal single die. In the latter resin film, a multilayer extrusion molding method is used. Further, a calender molding method may be used for the resin sheet of the core layer. Furthermore, although the lamination and integration of the resin sheet as the core layer and the resin film as the coating layer are mainly performed by hot press molding using heat and pressure, a pressure bonding method using an adhesive may also be used. it can.

Further, in the card of the present invention, since the core layer and the back layer of the coating layer facing the core layer are made of mutually compatible resins, lamination by heating and pressing is easy and relatively low temperature. The lamination conditions can be widened and the lamination work can be facilitated.

In the card of the present invention, a coating layer having a three-layer structure of an intermediate layer and both front and back layers on both sides of the core layer is integrally laminated on both surfaces of the core layer. After the magnetic tape is applied, a concealed printing layer serving as a printing ground for various designs and patterns is formed by silk printing or the like so as to cover the magnetic tape. Then, after various desired patterns and patterns are printed on the surface of the concealment printing layer, a protective layer that protects the patterns and the patterns and allows them to be seen through is formed, and is punched into a predetermined size as a card. You. Typical dimensions of the card are 54 mm on the short side and 85.4 mm on the long side.

The card of the present invention has a laminated structure in which the coating layers are integrated on both sides of the core layer as described above, the core layer is formed of an amorphous polyester resin sheet, and the coating layer is formed of an intermediate layer having a thermal layer. It is formed from a resin film having a deformation temperature of 95 ° C. or higher, and the surface layer and the back layer having high compatibility with the core layer are integrated on both surfaces thereof, so that the laminating temperature condition of the core layer and the coating layer is relatively low. Even if it is set, lamination is possible, and abnormal flow of the core layer can be suppressed, and lamination work is easy. Furthermore, the core layer is securely supported on both sides by the coating layer, and the laminability of the core layer and the coating layer is maintained even in a high-temperature environment, so that the heat deformation resistance is kept high, and the thermal deformation of the card in practical use is reduced. In addition, since the core layer hardly warps when embossing is performed, the card has an effect of effectively suppressing deformation and warpage of the entire card.

Further, in the card according to the present invention, since the surface layer, which is the surface of the coating layer, is formed of a resin film having high printability and high affinity for printing ink, the magnetic tape to be attached to the surface layer can be used. The concealed printing layer to be concealed can be reliably applied.

In the card according to the present invention, as described above, the thickness of the practical layer is usually set to about 0.6 to 0.8 mm.
The thickness of the core layer and the coating layer are relatively the same or the core layer is thicker than the coating layer. As a result, when this card is applied, it is possible to obtain a card to which good embossing properties and high heat-resistant deformation properties are reliably imparted.

As described above, the card of the present invention is put to practical use after a magnetic tape is stuck on its surface, a concealed print layer is formed by printing, and a pattern, pattern, etc. is printed, and then a protective layer is formed. However, it goes without saying that even when the card is processed in this way, the above-mentioned good embossability, high heat deformation resistance and good lamination properties are sufficiently maintained.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a card according to the present invention will be described based on examples and comparative examples.

First, as a material for an amorphous polyester resin sheet to be a core layer, a compounding material having the following compounding formula was prepared. Core layer: 1,4-cyclohexanedimethanol derivative copolymerized polyester (manufactured by Eastman Chemical Co., Ltd., product number PETG6763) 100 parts by weight Titanium oxide 10 parts by weight

Then, based on the above-mentioned formulation of the core layer, the ingredients were mixed by stirring in a tumbler, and then supplied to a single-layer extruder to produce a resin sheet having a thickness of 0.56 mm. The heat deformation temperature (JIS) of the obtained resin sheet
K 7191) was 65 ° C.

Further, the following resins were prepared as resin materials used for the intermediate layer, the surface layer, and the back layer which are to be the coating layers.
This is supplied to a multi-layer extruder based on the surface layer (A), the back layer (B) and the intermediate layer (C1 to C3) shown in Table 1 singly or in a mixing ratio (parts by weight). Each thickness is 0.0
1 mm, the thickness of the intermediate layer is 0.08 mm thick,
A three-layer resin film having a total thickness of 0.1 mm was produced.
At this time, mat-like fine irregularities were formed on the entire surface of the back layer immediately after the lamination by a mat roll. The heat distortion temperature of the obtained thermoplastic resin film (JIS K71)
91 in Table 1). -Resin- PAR: Polyarylate ("U-Polymer" manufactured by Unitika Ltd., product number: U-100) Crystalline PET: Polyethylene terephthalate (Product number: SA-1206 manufactured by Unitika) Amorphous PET: 1,4-cyclohexanedimethanol Derivative copolymerized polyester resin (manufactured by Eastman Chemical Co., Ltd., product number: PETG6763) PC: polycarbonate (Mitsubishi Gas Chemical Co., Ltd. “Iupilon” product number: H-3000)

[0041]

[Table 1]

Next, as a resin film for the coating layer,
As described in each of Examples (Examples 1 to 3) and Comparative Examples in Table 2, a resin film having the resin content shown in Table 1 was selected and applied to both surfaces of the core layer resin sheet obtained above. By hot press molding method, temperature 100 ℃, pressure 10kg
The laminate was integrated by heating and pressing at f / cm ² for 10 minutes to obtain a laminated body made of a thermoplastic resin having a nominal thickness of 0.76 mm after lamination. In the obtained laminate, no abnormal flow of the core layer was observed in any of the examples and the comparative examples.

Further, the laminate was punched into a size having a short side of 54 mm, a long side of 85.4 mm, and a radius of curvature of 2.5 mm at a corner, and then a sample for evaluating heat-resistant deformation and embossability. And

Each sample was evaluated according to the following evaluation method, and the results were made to correspond to each Example and each Comparative Example.
Also shown in Table 2. -Evaluation method- [Lamination property] The sample was subjected to a peel test between both layers in accordance with JIS X6301, and a peel strength of 6 N / cm or more was judged as pass (○), and a peel strength of less than 6 N / cm was judged as unacceptable (x). [Printability] After laminating the core layer and the coating layer, silk printing was performed on the surface of the coating layer, that is, the surface layer, using a concealing ink having the following composition, and an ink peeling test was performed using a cellophane tape. The ink that does not peel off with the cellophane tape passes (o) and the ink that peels off rejects (x).
And Hiding ink: 85 parts by weight of screen printing ink (SS6000 manufactured by Toyo Ink Co., Ltd.) 15 parts by weight of aluminum paste [Heat-resistant deformation resistance] A sample was placed in an oven at 90 ° C.
It was leaned up at 45 ° in the vertical direction, left standing for 6 hours, taken out of the oven, and allowed to stand on a horizontal platen to measure the size of warpage (unit: mm). And the measured value is 2.0
mm or less was regarded as acceptable (o), and those exceeding 2.0 mm were rejected (x). [Warpage due to Embossing] Characters were engraved on the sample using an electromagnetic embosser, and the warpage due to embossing was measured according to JIS X6301 (unit: mm).
And if the measured value is 2.5 mm or less, it is judged as pass (O),
Those exceeding 2.5 mm were rejected (x).

[0045]

[Table 2]

As is clear from Table 2, the samples of Examples 1 to 3 all have good lamination properties, printability, and heat deformation resistance, and are substantially small in warpage due to embossing and high. It had practical quality.

On the other hand, the sample of the comparative example was good in terms of heat deformation resistance and warpage due to embossing, but was poor in quality due to rejection in lamination property and printability, and was difficult to be put to practical use. there were.

[0048]

As described above, the card of the present invention is a card in which a coating layer is laminated and integrated on both sides of a core layer, wherein the core layer is made of an amorphous polyester resin sheet, Is a laminated film having a three-layer structure of an intermediate layer made of a thermoplastic resin film and a surface layer and a back layer integrated on both surfaces thereof, wherein the intermediate layer is a thermoplastic resin film having a heat distortion temperature of 95 ° C. or higher, the surface layer and Since the back layer is an amorphous polyester resin film and the core layer and the back layer of the coating layer are laminated and integrated facing each other, the lamination of the core layer and the coating layer The temperature condition can be set relatively low, and there is an effect that the abnormal flow of the core layer can be suppressed and the laminating operation can be facilitated. Supported by high temperature environment Also in this case, the laminating property of the core layer and the coating layer is maintained, the heat deformation resistance is kept high, the thermal deformation of the card in practical use is reduced, and the core layer is warped when embossing is performed. Because it will be difficult
This has the effect of effectively suppressing deformation and warpage of the entire card. Further, in the card of the present invention, since the surface layer, which is the surface of the coating layer, is formed of a resin film having good printability, the concealment printing layer for concealing the magnetic tape attached to the surface layer has good adhesion. There is an effect that it can be reliably applied.

Further, in the card according to the present invention, the intermediate layer, the surface layer and the back layer, which constitute the coating layer, are made of polyarylate, polycarbonate and polyethylene having a high heat distortion temperature. Since it is a thermoplastic resin film composed of a mixed resin of a combination of two or more types selected from terephthalate, the type and the mixing ratio of these resins are appropriately selected, and the heat deformation temperature of the coating layer is in a high temperature range and a wide range. By setting the desired temperature in the above, it is possible to adjust the heat deformation resistance of the card to be put to practical use, maintain good lamination properties between the core layer and the back layer, and maintain good embossability. There is an advantage that a card having better heat deformation resistance than before can be obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06K 19/06 G06K 19/00 K G11B 5/73 B F-term (Reference) 2C005 HA06 HA13 HA21 HA30 JA02 JA08 KA02 KA03 KA07 KA08 KA40 LA05 LA06 4F100 AK01B AK41A AK41C AK41D AK41E AK42B AK43B AK45B BA05 BA10D BA10E BA15 BA16 DD07 GB71 JA12A JA12C JA12D JA12E JA20B JB16B JL01 J0504B05A01

Claims (2)

[Claims] 1. A card in which a coating layer is laminated and integrated on both sides of a core layer, wherein the core layer is formed of an amorphous polyester resin sheet, and the coating layer is formed of a thermoplastic resin film. 3 of surface layer and back layer integrated on both sides
A laminated film having a layer structure, wherein the intermediate layer is a thermoplastic resin film having a heat distortion temperature of 95 ° C. or higher, and the surface layer and the back layer are amorphous polyester resin films,
A card wherein the core layer and the back layer of the cover layer face each other and are integrally laminated. 2. The card according to claim 1, wherein the intermediate layer of the coating layer is a thermoplastic resin film made of a mixed resin of a combination of two or more selected from polyarylate, polycarbonate and polyethylene terephthalate.