WO1999009102A1

WO1999009102A1 - Resin composition for cards, and sheets and cards

Info

Publication number: WO1999009102A1
Application number: PCT/JP1998/002545
Authority: WO
Inventors: Yoshiki Nishikawa
Original assignee: Mitsubishi Plastics Inc.
Priority date: 1997-08-19
Filing date: 1998-06-09
Publication date: 1999-02-25
Also published as: TW426702B; JP3628256B2; AU7552998A

Abstract

Plastics are improved in secondary processabilities so as, e.g., not to suffer curling by embossing, not to suffer card warpage upon exposure to high temperatures, to give flat sections upon card formation by punching, and to have satisfactory releasability from the press plates. According to the properties required, various means are taken to modify substantially noncrystalline polyester resins. For example, a mixture of polyethylene glycol with a sodium alkylbenzenesulfonate in a weight ratio of from 1/9 to 9/1 is added to the resin in an amount of 0.2 to 1.5 % by weight. Alternatively, powdery silicic acid and/or powdery magnesium silicate each having an average particle diameter of 5 νm or smaller is incorporated in an amount of 0.5 to 5.0 % by weight, or a particulate and/or flaky inorganic filler having an average particle diameter of 3 to 10 νm is incorporated.

Description

Specification

Resin composition, sheet and card for forceps

Technical field

The present invention relates to a resin composition used for a material of a plastic card such as a magnetic stripe card and an IC card, and a sheet and a card produced on the card. Background art

As a material for plastic cards such as magnetic stripe cards and IC cards, polychlorinated vinyl resin (hereinafter referred to as “PVC”) has been used. In general, magnetic stripe cards are made by laminating transparent oversheets with magnetic stripes above and below a white core sheet, bonding the layers together by hot pressing (hereinafter referred to as “lamination”), and then punching out the blade. It is manufactured by cutting into a card shape with a stamping machine and finally embossing with a stamping machine.

Power IC card produced by a variety of ^methods?, Similarly to the production of magnetic stripe cards, to prepare a card material by bonding two sheets, cutting a recessed portion for mounting the IC chip in post-processing The system is becoming mainstream.

Usually, the sheet is pre-applied with the printing power S required for the front card.

PVC is suitable as a plastic card material because it can be mass-produced by calendering and has excellent secondary workability such as lamination suitability, peelability from the press plate after lamination, and embossing stamping. Material.

Recently, the need for non-PVC-based card materials has been increasing in response to the ecology boom in the world, and polystyrene-based and polyester-based materials have been proposed.

However, these non-PVC card materials, such as various impact-resistant styrene and acrylonitrile z-butadiene-styrene copolymers, have burrs on the cut surface when punched into a card shape (hereinafter referred to as “burr”). After embossing the card, the warpage of the card (hereinafter referred to as “embossed curl”) also increased. In addition, polyester-based materials that are non-PVC-based card materials include, for example, substantially those in which the monomer component before polymerization is terephthalic acid and the diol components are ethylene glycol and cyclohexanedimethanol. There are non-crystalline polyester resins. Compared to PVC, non-crystalline polyester resin has excellent laminating properties at low temperatures, good engraving properties, and excellent durability against repeated bending and twisting when it is made into a card. is there.

Therefore, non-crystalline polyester resins are still insufficient in terms of force secondary processing, which is attracting attention as a suitable card material. That is, when a card made of only an amorphous polyester resin is exposed to a high temperature, the card may be warped or embossed. Furthermore, when the punching into a card shape, greater elongation of the over sheet of male and female clearance blade Nuku out is flat punching member ^forces? Obtained Nikure. If the card was curled or if the cut surface of the card was not flat, not only the touch was poor, but also the cross section could be caught by the machine when inserting or removing the card from the card reader.

Alternatively, after the laminated sandwiched press plate, can and removed from cooled, sticking force of the press ^plate? Very powerful, the mediation impossible possible to get the release of the practical level Was.

As described above, non-PVC-based non-crystalline polyester resin with excellent environmental suitability is not enough in terms of the force s that is suitable for card base material s, and the secondary workability. When used in cards, improvements have been desired to satisfy the required secondary workability. Disclosure of the invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a resin composition for a plastic card, a sheet, and a card made of a non-pVC resin which do not generate card warpage or emboss curl. To provide. Another object of the present invention is to provide a resin composition, a sheet and a card for a non-PVC-based resin, which has a flat punched-out cross section of the card. Still another object of the present invention is to provide a resin composition for non-PVC-based plastic forceps, a sheet and a card, which have improved releasability from a press plate.

A first aspect of the resin composition for a card of the present invention is characterized by containing a substantially non-crystalline polyester-based resin as a main component.

The second embodiment of the resin composition for a card of the present invention is used for a plastic card material. A material obtained by mixing a substantially non-crystalline polyester-based resin with polyethylene glycol and sodium alkylbenzenesulfonate at a weight ratio of 1Z9 to 9Z1, 0.1 It is characterized in that it is added in the range of from 1.5% by weight to 1.5% by weight.

A third embodiment of the resin composition for a card according to the present invention is directed to a substantially non-crystalline polyester-based resin, wherein at least one of a powdered caic acid and a powdered magnesium silicate having an average particle size of 5 μm or less is used. Is contained in the range of 0.5 to 5.0% by weight with respect to the substantially non-crystalline polyester resin.

A fourth aspect of the card resin composition of the present invention, the substantially non-crystalline polyester Le resins, particulate having an average particle size of. 3 to 1 0 _mu m and / or plate-like inorganic FILLER one The content is in the range of 2 to 10% by weight based on the substantially non-crystalline polyester resin.

The resin composition for a card may be a polyester resin obtained by dehydrating and condensing a mixture of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol from a non-crystalline polyester resin.

The sheet of the present invention is characterized by being produced using any one of the resin compositions for cards.

The card of the present invention is characterized by having a layer produced using any one of the above resin compositions for cards.

Here, the resin composition for a card is composed of a substantially non-crystalline polyester resin and polyethylene glycol and sodium alkylbenzene sulfonate in a weight ratio.

A resin composition in which a mixture of 1/9 to 9Z1 is added in a range of 0.1% by weight to 1.5% by weight. Two sheets prepared using the resin composition are used. it ^mosquitoes? preferably a made card.

Another aspect of the card of the present invention is a card having an oversheet as an outermost layer and a core sheet as an inner layer, wherein the core sheet is substantially made of an amorphous polyester-based resin, and the oversheet is made of glass. It is characterized by comprising a resin composition having a transition temperature of 90 to 140 ° C.

Here, the oversheet can be made of polycarbonate resin. The non-crystalline polyester resin may be a polyester resin obtained by dehydration-condensing a mixture of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol. BEST MODE FOR CARRYING OUT THE INVENTION

The resin composition of the present invention contains a substantially non-crystalline polyester resin as a main component.

The polyester as used herein refers to a dehydrated condensate of a dicarboxylic acid and a diol. The “substantially non-crystalline polyester” used in the present invention refers to an acid component or a diol component of a monomer before polymerization. Alternatively, it is a transparent copolyester resin in which both the acid component and the diol component are composed of two or more components. What does not happen.

Specifically, terephthalic acid as the dicarboxylic acid, isophthalic acid, adipic acid, naphthalene dicarboxylic acid, and examples of the diol ethylene glycol, diethylene glycol, triethylene glycol, force ^s like Kisanjimeta Nord cyclohexylene. The combination of an acid component and a diol component is appropriately performed. When a plurality of acid components and a plurality of diol components are respectively selected, the selection is appropriately performed.

As a substantially non-crystalline polyester resin, a polyester resin in which the acid component of the monomer before polymerization is terephthalic acid and the diol components are ethylene glycol and cyclohexane dimethanol (trade names: PETG, Eastman Chemical Co., Ltd.) is commercially available. However, in the present invention, an additive such as a coloring agent may be added.

In the present invention, by adding polyethylene glycol and sodium alkylbenzenesulfonate to a substantially non-crystalline polyester resin, it is possible to improve the sticking property to a press plate during card production. .

The polyethylene glycol to be added to the substantially non-crystalline polyester resin is not particularly limited, but a solid wax having a molecular weight of 1,000 to 500,000 can be easily mixed with the pellet, and a sheet. It is preferably used because it is difficult to volatilize due to the heat required when processing into steel.

The sodium alkylbenzenesulfonate used here is not particularly limited in terms of the length of the alkyl group, but sodium laurylbenzenesulfonate is easily available commercially and can be suitably used.

The ratio of polyethylene glycol to sodium alkylbenzene sulfonate added to the substantially non-crystalline polyester resin is preferably in the range of 1Z9 to 9/1 by weight. Polyethylene glycol and alkylbenzene sulfo added When the ratio of sodium phosphate is out of the above range, the peelability from the press plate after lamination is sufficient.

Generally, a plastic card such as a magnetic stripe card or an IC card is formed by laminating a plurality of sheets, and the outermost layer is called an over-sheet and the inner layer is called a core sheet. The sheet size of the core layer and the overlayer to be laminated differs depending on the card manufacturer, and the overlayer may be slightly smaller than the core layer. Therefore, it is necessary to improve not only the releasability of the overlayer but also the core layer from the press plate.

When a substantially non-crystalline polyester resin is used as a core layer of a card comprising a core layer and an over layer, or used as an over layer, or as a core layer of a card comprising only a core layer In any case, the added amount of polyethylene glycol and sodium alkyl benzene sulfonate is in the range of 0.1% by weight to 1.5% by weight based on 100% by weight of the amorphous polyester resin. It is preferably from 0.2% to 1.5% by weight, more preferably from 0.5% to 1.0% by weight.

When the amount of polyethylene glycol and sodium alkylbenzenesulfonate is 0.1% by weight or more, a practical level of releasability is obtained, and when it is 0.2% by weight or more, sufficient releasability is obtained. . When the amount of these additives is 1.5% by weight or less, the sheet has excellent physical properties and printability. Here, the printability means the familiarity between the ink used when printing on a sheet and the sheet. If the printability is poor, ink repelling may occur, making it impossible to print cleanly on the sheet.

The resin composition is also excellent in antistatic properties, has the advantage that the sheet is not easily fed during printing due to static electricity, does not cause jumps, and has the advantage that sparks are less likely to occur during press work.

In the present invention, a powdery keic acid having an average particle diameter of 5 μm or less and Z or a powdery magnesium silicate are added to a substantially non-crystalline polyester resin, and the polyester resin is added in an amount of 100% by weight. ^_0/0 5 against 5. by 0 weight ^_0/0 by containing, secured the transparency of the card, the force one de made does not occur cracking force of engraved portions, and flat punching member forces ^s obtained.

Powdered caustic acid is transparent but hard, whereas powdered magnesium silicate is soft but has reduced transparency. Therefore, it may be appropriately selected according to the characteristics required for the sheet or the card. In addition, powdery The acid and the powdery magnesium silicate may be used alone, but may be used in combination. Therefore, the combination ratio and the like may be appropriately selected according to the properties required for the card and the like. However, the content with respect to the polyester resin is 0.5 to 5.0% by weight.

If the amount of the powdered caic acid is 0.5% by weight or more, the effect of improving the punched cross section can be obtained. Although the transparency does not decrease even if the amount of the powdered kaic acid exceeds 5.0% by weight, the hardness becomes hard, so that the abrasion of the punching blade and the cracking of the engraved portion are liable to occur. If the amount of the powdered magnesium silicate is 0.5% by weight or more, the effect of improving the punched cross section can be obtained. On the other hand, if the amount of the powdered magnesium silicate exceeds 5.0% by weight, abrasion of the punching blade and cracking of the stamped portion do not occur, but the transparency of the sheet is reduced.

It is preferable that the powdery kaic acid and the powdery magnesium silicate used here have an average particle size of 5 μm or less. If powdered citric acid having an average particle size of more than 5 m is used, the punching blade force is easily worn when punching into a card shape, and the impact resistance of the sheet is reduced. This is because the stamp may be broken. Also, if powdered magnesium silicate having an average particle size of more than 5 m is used, transparency is reduced, and visibility of a pattern or a character may be reduced.

Normally, plastic cards such as magnetic stripe cards and IC cards are formed by laminating a plurality of sheets, and the outermost layer is called an oversheet and the inner layer is called a core sheet. If the card produced is intended to have a flat stamped cross-section, at least one of the core sheet and the oversheet contains such a powdered kaic acid and / or a powdered magnesium silicate. However, it is preferable to use an overseat for the following reasons. That is, usually, core sheet requires hiding property, and to be a base of the print layer or the print layer is required, which is titanium oxide ^power? Added. For this reason, it is unlikely that the core sheet will greatly expand due to the clearance between the male and female dies in the punching process. Therefore, it is preferably used for paper sheets with poor punching performance.

In the present invention, a granular and / or plate-like inorganic filler having an average particle diameter of 3 to 10 m is added to the substantially non-crystalline polyester resin by adding 100% by weight of the non-crystalline polyester resin. by containing 2-1 0% by weight relative to the ^_0/0, it is possible to improve the embossing force one le of the card to be manufactured. The type of the inorganic filler used here is not particularly limited as long as its shape is granular or plate-like and the average particle is 3 to 10 z ^ m. Specific examples include talc, magnesium silicate, calcium carbonate, silica, myriki, or a mixture thereof. That is, needle-like materials such as glass fibers are not included. When the average particle size of the inorganic filler is 3 m or more, the effect of preventing the occurrence of emboss curl is great, and when the average particle size is 10 m or less, the impact resistance of the obtained sheet is sufficient. Does not break.

When the amount of the inorganic filler added to the non-crystalline polyester resin is in the range of 2 to 10% by weight, the effect of improving the embossing force is large, and the problem of cracking of the engraved portion does not occur.

For the purpose of improving the emboss curl in a force having an oversheet and a core sheet, at least one of them may be made of such a resin containing an inorganic filler, but the core sheet may be used for the following reasons. preferable.

That is, the core sheet is usually printed with personal information and the like, and is protected by an oversheet. Oversheets are used to protect the print of the core sheet and to decorate the print, and are often thin and transparent. In general, the card is required to have an appropriate thickness and high light concealment and reflection properties due to the characteristics of the reader / writer, so the core sheet is thick and contains a coloring agent such as titanium oxide. Often. Since the embossing process is performed after laminating the upper sheet and the core sheet, if the purpose is to improve the emboss curl, at least one of the core sheet and the over sheet is made of such a resin containing an inorganic filler. Any sheet may be used. However, as described above, usually, the core sheet is preferably used for the core sheet because the core sheet is thicker than the over sheet and the over sheet has transparency.

In the present invention, the resin composition described above can be used to form a sheet by a known method such as, for example, a melt extrusion method, or a magnetic stripe card or a plastic card such as an IC card. Can also. Note that an antistatic agent or the like may be added to the core sheet.

In the present invention, the core sheet is made of a substantially non-crystalline polyester resin, and the oversheet is made of a resin having a glass transition temperature of 90 to 140 ° C., whereby the heat resistance temperature of the card is improved. Can be raised.

Such a core sheet is obtained by adding an additive, for example, a coloring agent such as titanium oxide, a slipping agent, an antistatic agent, etc. to a substantially non-crystalline polyester resin, and applying a melt extrusion method or the like. Therefore, it can be obtained.

If the glass transition temperature of the oversheet is 90 ° C or more, the heat resistance of the card is sufficiently improved, and if it is 140 ° C or less, sufficient adhesion to the core sheet can be obtained during lamination. Thus, there is no need to raise the temperature to improve the fusibility, so the co-sheet does not flow and does not become thinner than the desired card thickness. The glass transition temperature is determined from the peak of the loss modulus in the measurement of dynamic viscoelasticity at a frequency of 1 Hz. Specifically, the temperature dependence of the tensile modulus is measured using a viscoelastic spectrometer while applying a sinusoidally changing strain at a frequency of 1 Hz to the sample. The measurement conditions were as follows: the sample thickness was 1 mm, the maximum strain was 1%, the heating rate was 4 ° CZ min., Starting from room temperature, the tensile loss modulus E "showed a peak at the maximum force ^s , and the tensile storage modulus E 'was large. The temperature near the beginning of the decrease was defined as the glass transition temperature.

As an oversheet preferably used herein, a polycarbonate (hereinafter sometimes abbreviated as “PC”) resin is cited because it can be heat-fused with an amorphous polyester resin. In addition, copolymerized PC obtained by copolymerizing an aliphatic dicarboxylic acid, one obtained by adding a plasticizer to PC and adjusting the glass transition temperature to fall within the above range, and the like can also be used. Note that a slipping agent, an antistatic agent, and the like may be added to these resins. The sheet can be obtained by a known method such as a melt extrusion method.

In the present invention, two or more of the above means for improving the secondary workability can be used in combination according to the characteristics required for the card. When used in combination, the secondary workability of each can be improved together. Hereinafter, the present invention will be described specifically with reference to Examples. Example

Example I-1

As a substantially non-crystalline polyester resin, 100 parts by weight of PETG 667 (manufactured by Yeastman Chemical Company), 10 parts by weight of titanium oxide as a white pigment, and polyethylene glycol (molecular weight 3 A sheet having a thickness of 400 / m was obtained by a T-die extrusion method using a mixture of (0000)) and sodium laurylbenzenesulfonate or another slip agent as shown in Table 1.

Next, the obtained sheet was pressed to a size of 200 mm × 200 mm, and two cut sheets were stacked and sandwiched between two chromium-plated steel sheets, and the pressing temperature was set at 120 ° C. The sample pressure was kept at 50 kgf Z cm ² for 10 minutes. Then bring this to room temperature After cooling, the chrome plated steel sheet was taken out and the two chrome plated steel sheets were peeled off. The force required to peel off the chrome plated steel plate was evaluated by tactile sensation, and the peelability from the plated plate was evaluated.

In order to evaluate printability, the surface tension of the obtained extruded sheet was measured using a wet index standard solution (manufactured by Nacalai Tesque).

However, the evaluation criteria were as follows: Regarding the "peelability from the plating plate" in the table, "A" indicates that it can be easily peeled, and "B" indicates that it exhibits peelability with resistance but practical. Those that could not be evaluated were designated as “C.” The “Printability” was rated “A” for those with a surface tension of 38 dyne / cm or more, and “B” for those with a surface tension of 36 dyn eZcm or more and less than 38 dyne eZcm. And less than 36 dyne / cm were designated as “C”.

The addition amount of the lubricant in the table is the Weight ^_0/0 when the PETG 6 763 1 00 and, PEG is an abbreviation for polyethylene glycol, LB S in abbreviation Natoriumu laurylbenzenesulfonate is there. Examples I-1 2 to I-5, Control I-1; ~ I— 8

A sample for evaluation was prepared in the same manner as in Example 1-1 except that the type and amount of the slipping agent in Example I-11 were changed as shown in Tables 1 to 3.

About the obtained evaluation sample, the same evaluation as Example I-1 was performed. Tables 1 to 3 summarize the evaluation results.

[table 1]

Example

1-1 1-2 1-3 1-4 1-5 types PEG 0.02 wt% of slip agent PEG 0.18 wt% PEG 0.5 wt% PEG 0.15 wt% PEG 1.35 wt ¹ ¾ and straight LBS 0.18 wt% LBS 0.02 wt% LBS 0.5% by weight LBS 1.35% by weight LBS 0.15% by weight

1/9 9/1 5/5 1/9 9/1 weight ratio of PEG / LBS

Total addition amount 0.2% by weight 0.2% by weight 1.0% by weight 1.5% by weight 1.5% by weight Peeling property from Mac board B B A A A

Printability AAABB [Table 2]

[¾ 3]

As is clear from Example I-1 I-15 and Control I_1 I_8, the card having the structure of the present invention was found to be excellent in peelability and printability. In addition, in the above-described example, the same result is obtained with a force obtained by laminating two sheets of substantially non-crystalline polyester resin containing a white pigment, and a force obtained by forming a core layer and an over layer. Obtainable. Of course, the same applies to other configurations. Example II-1

[Preparation of core sheet]

T-die extrusion of non-crystalline polyester obtained by adding titanium oxide to PE TG 6763 (manufactured by Istman Chemical Co., Ltd.) to a concentration of 10% by weight. A core sheet having a thickness of 560 m was obtained by the coating method.

[Production of oversheet]

0.5 weight ^_0/0 to 100 weight ^_0/0 lauryl base sodium Nze Nsuruhon acid PETG6763 as a crystalline polyester, polyethylene glycol of molecular weight 3000 to those obtained by adding 0.5 wt%, average particle size as an additive 0.6% by weight of 3 m of citric acid was mixed, and an oversheet having a thickness of 100 m was obtained by a T-die extrusion method. The amounts of the additives shown in the table are% by weight with PETG 6763 being 100.

[Preparation of card]

A pattern is printed on both sides of the obtained core sheet by the silk screen printing method, oversheets are overlaid on both sides, sandwiched between two chrome plated steel sheets, and pressed at a temperature of 120 ° (:, sample pressure of 20 kgf Zcm ² at 5 kgf Zcm ²⁾ . After holding for 1 minute, it was cooled to room temperature, taken out of the chrome plating plate, and punched into a card shape with a punching blade composed of a male die and a female die, with a clearance of 30 m between the male die and the female die.

The obtained card sample for evaluation was embossed by the following method using an electric enbosser, the foil of the engraved portion was transferred by a chipper, and the evaluation was performed according to the following criteria. The average particle size was determined as follows.

Embossed stamp:

In accordance with “6. Position of embossed characters and shape! Dog dimensions” in JIS X-6301, “1234 5678 9012” was engraved.

[Measurement of average particle size]

The mode diameter was determined from the particle size distribution data measured by a sedimentation type particle size distribution analyzer S A—CP 2-20 (manufactured by Shimadzu Corporation), and the average particle size was determined.

[Evaluation]

The flatness of the punched cross section of the obtained evaluation card sample was evaluated by finger touch. The visibility of the pattern printed on the core sheet and the breakage of the characters in the engraved part were visually evaluated. The results are shown in Table 4. The evaluation criteria are as follows. Evaluation criteria for punched section:

A Zaratsuki is not felt at all

B Slightly noticeable

C Zaratsuki is large

Evaluation criteria for visibility of picture: A The pattern is clearly visible

B Slightly cloudy feeling

C

Evaluation criteria for cracks in the engraved part:

A No crack is seen

B There is a cracked part. Example II—2 to Π—5, Control II—1-111 to 9

In Example II-1, a card sample for evaluation was prepared in the same manner as in Example II-11 except that the types and amounts of additives added to the oversheet were changed as shown in Table 4. The same evaluation as in 1 was performed.

Table 4 summarizes the obtained results.

[Table 4]

Note) The unit of the additive amount is% by weight ₍ As is evident from Table 4, a card using a resin containing caic acid with an average particle size of 5 or less and Z or magnesium silicate as an over-sheet produces a character breaking force of ⁵ 'at the IJ mark. It was a transparent card with excellent transparency and a punched cross section. Example III-1

[Preparation of core sheet]

A non-crystalline polyester made by adding titanium oxide to PETG 676 3 (manufactured by Yeastman Chemical Co., Ltd.) to a concentration of 5% by weight, and having an average particle size of 4 m shown in Table 5 as an inorganic filler 5% by weight of talc was mixed, and a core sheet having a thickness of 560 was obtained by a T-die extrusion method. Note that the amount of filler added in the table is% by weight when PETG 667 is 100.

[Production of oversheet]

Respect PETG 6 7 (manufactured by Eastman Chemical Company) 6 3 1 0 0 part by weight as a non-crystalline polyester, 0 sodium lauryl benzene sulfonate. 5 wt ^_0/0, the molecular weight 3 0 0 0 polyethylene glycol 0. 5% by weight was added, and an oversheet having a thickness of 100 // m was obtained by a T-die extrusion method.

[Preparation of card]

A pattern is printed on both sides of the obtained core sheet, the oversheet is overlaid on both sides, sandwiched between two chrome-plated steel sheets, and kept at a press temperature of 120 ° C and a sample pressure of 20 kgf / cm2 for 5 minutes. After cooling to room temperature, it was taken out of the chrome plating plate and punched into a card shape with a punching blade composed of a male die and a female die to produce a card sample for evaluation. The obtained card sample for evaluation was embossed as described in Example II-11 using an electric enbosser, the foil at the engraved portion was transferred using a chipper, and evaluated according to the following evaluation criteria. The average particle size of the inorganic filler was determined as follows.

[Measurement of average particle size]

The mode diameter was determined from the particle size distribution data measured by a sedimentation type particle size distribution analyzer S A—C P 2—20 (manufactured by Shimadzu Corporation), and the average particle size was determined.

[Evaluation]

The emboss curl of the obtained card sample for evaluation was measured in accordance with JISX-6301 (4.2.5 "Curve of card"). In addition, the character breakage of the engraved part was visually evaluated. Table 5 summarizes these results. P / 02545

14 Example III—2 to III—6, control ΠΙ—1 to III—6

In Example III-11, a card sample for evaluation was prepared in the same manner as in Example III-1, except that the type and amount of the inorganic filler added to the core sheet were changed as shown in Table 5. The same evaluation as in 1 was performed.

Table 5 summarizes the obtained results.

[Table 5]

As is clear from Table 5, a card using a resin containing an inorganic filler having an average particle diameter of 3 to 10 m and containing 2 to 10% by weight as a core sheet has no embossed curl, and has an engraved portion ( It was a flat card with no character breakage (embossed part). Example IV—1

[Preparation of core sheet] PETG (Eastman) is a non-crystalline polyester containing terephthalic acid as the acid component and ethylene glycol (about 70 mol%) and cyclohexanedimethanol (about 30 mol ⁰ / o) as the diol component. 100 parts by weight of Titanium Co., Ltd. was added to 100 parts by weight of Titanium Co., Ltd., and a white core sheet having a thickness of 300 / m was obtained by a T-die extrusion method.

[Production of oversheet]

A transparent oversheet having a thickness of 100 was obtained by a T-die extrusion method using Lexan SP101 (manufactured by Nihon Giplastic Co.), which is a copolymerized polycarbonate. The glass transition temperature of the over sheet is 130 ° C. However, the glass transition temperature was measured as follows.

Measurement of glass transition temperature:

Using a viscoelastic spectrometer of Toyo Seiki Seisaku-sho, the temperature dependence of the tensile modulus was measured while applying a sinusoidally changing strain at a frequency of 1 Hz to the sample. The measurement conditions were: sample thickness lmm, maximum strain 1%, heating rate 4 ° C / min, and started at room temperature. The temperature near the point where the tensile loss elastic modulus E "shows a maximum peak and the tensile storage elastic modulus E, starts to decrease significantly is defined as the glass transition temperature.

[Production of evaluation card sample]

A loop coil for a four-turn antenna in which a copper wire having a wire diameter of 0.15 mm is wound around the obtained core sheet four times, and an IC chip having a size of 5 mm X 5 mm and a thickness of 0.35 mm, etc. Were arranged at equal intervals, temporarily fixed with a cyanoacrylate-based instant adhesive, and a core sheet was stacked so as to sandwich an IC chip and the like.

The oversheet, the core sheet to which the IC chip, etc. were temporarily fixed, the core sheet, and the oversheet were stacked in this order, and the outer oversheet was sandwiched between chrome plated steel plates each having a mirror-finished surface. Next, after laminating at a press temperature of 130 ° C. and a sample pressure of 15 kgf Z cm ² for 10 minutes, the laminate was cooled to room temperature, and punched into a card shape to obtain a card sample for evaluation. Example IV—2

In Example IV-1, the oversheet was added to 100 parts by weight of Novalex polycarbonate (manufactured by Mitsubishi Engineering-Plastics Corporation) 100 parts by weight with plasticizer TCP (tricresyl phosphate, A card sample for evaluation was prepared in the same manner as in Example IV-1, except that an oversheet consisting of a mixture to which 5 parts by weight of Daihachi Chemical Co., Ltd.) was added was used. The glass transition temperature of the oversheet is 135 ° C Met. Example IV—3

In Example IV-2, an evaluation force sample was prepared in the same manner as in Example IV-2, except that the amount of the plasticizer TCP used for the oversheet was changed to 18 parts by weight. The glass transition temperature of the oversheet was 90 ° C. Control IV—1

An evaluation card sample was prepared in the same manner as in Example IV-1, except that in Example IV-1, the oversheet was replaced with an oversheet made of NOVAREX 720-2. The glass transition temperature of the oversheet was 155 ° C. Control IV—2

In Example IV-2, an evaluation force sample was prepared in the same manner as in Example IV-2, except that the amount of the plasticizer TCP used for the oversheet was changed to 25 parts by weight. The glass transition temperature of the oversheet was 80 ° C. Examples IV—1 to IV—3, Control IV—1 to! The following evaluation was performed on the evaluation card sample obtained in V-2.

[Evaluation]

The following heat resistance test and force peel test were performed.

Heat resistance test:

The “warpage” generated in the evaluation card sample was measured as follows. Place the evaluation card sample in an oven at a predetermined temperature, leave it for 24 hours, remove it, place the evaluation card sample cooled to room temperature on a horizontal plate, and set the maximum distance from the horizontal plate to the evaluation card sample surface ( (Including the thickness of the card sample). The set temperature of the oven was increased every 50 ° C from 50 ° C, and the maximum temperature at which the measured value did not exceed 2 mm was defined as the “heat-resistant temperature”.

Card peel test:

After the evaluation card sample was immersed in liquid paraffin at 150 ° C. for 5 minutes, it was taken out and the cross section of the peripheral portion of the evaluation card sample was visually observed.

As a result of the card peeling test, no peeling was observed in the evaluation force samples obtained in Examples IV-1 to IV-13 and Control IV-2 in which the glass transition temperature was 140 ° C or lower. If, the evaluation force sample obtained in Control IV-1 with a glass transition temperature of 140 ° C or lower showed peeling.

According to the heat resistance test, the heat resistance temperature of Examples IV-1 and IV-2 whose glass transition temperature is 90 ° C or more is 80 ° C, and that of Example IV-3 is 70 °, both of which are 70 ° C. The heat resistance temperature of Control IV-2, which is not less than C but has a glass transition temperature of less than 90 ° C, was 60. That is, the heat resistance temperature of Examples IV-1 to IV-3 is higher than the practical level, while that of Control IV-2 is lower than the practical level.

As described above, Embodiment IV-1! V-3 obtained excellent results in both the card peeling test and the heat resistance test. Example IV—4

In Example IV-1, 100 parts by weight of titanium oxide, 0.5 parts by weight of sodium ruralylbenzenesulfonate, and 100 parts by weight of the amorphous polyester (PETG6673) were used as the core sheet. After the addition of 0.5 parts by weight of polyethylene glycol having a molecular weight of about 300, and lamination using an oversheet having a size slightly smaller than the core sheet, the same procedure as in Example IV-1 was repeated. Got a sample.

After lamination, when taking out an evaluation card sample was cooled, peelability force between plated ^plate? Very light, the appearance of the resultant card, similar to the heat resistance illustrative IV- 1, was excellent . As described in detail above, a mixture of a substantially non-crystalline polyester resin and a mixture of polyethylene glycol and sodium alkylbenzene sulfonate at a weight ratio of 1Z9 to 9/1 is added in an amount of 0. The resin composition for cards added in the range of 1% by weight to 1.5% by weight has excellent releasability from the press plate after lamination, and also has excellent transparency and printability. It has been found that it can be suitably used as an IC card material.

In addition, the powdered Ca-acid and Z or powdered magnesium silicate having an average particle size of 5 ^ 111 or less were added to the substantially non-crystalline polyester resin with respect to 100% by weight of the non-crystalline polyester resin. The resin composition containing 0.5 to 5.0% by weight has excellent transparency, does not cause character cracks in the engraved portion of the card, has a flat punched cross section, has a good feel, and has a good card reader. The cross section does not catch on the machine when moving in and out. Furthermore, a substantially non-crystalline polyester-based resin, having a mean particle size of 3 to 10 m, and a granular and / or platen! The resin composition containing 0.5 to 5.0% by weight of the inorganic polyester resin of dog with respect to 100% by weight of the non-crystalline polyester resin has a small embossed curl without character breakage at the engraved portion. Therefore, the card does not catch on the machine when inserting or removing the card from the reader / writer.

The core sheet is a sheet made of an amorphous polyester resin, and the oversheet is a plastic card made of a sheet with a glass transition temperature of 90 to 140 ° C. And solve card warpage.

Claims

The scope of the claims

1. A resin composition for forceps comprising a substantially non-crystalline polyester resin as a main component.

2. A material used as a material for plastic cards, in which polyethylene glycol and sodium alkylbenzene sulfonate are mixed in a weight ratio of 1Z9 to 9Z1 to a substantially non-crystalline polyester resin. 2. The card resin composition according to claim 1, wherein said resin composition is added in a range of 0.1% by weight to 1.5% by weight.

3. At least one of a powdered caic acid and a powdered magnesium silicate having an average particle size of 5 μm or less is added to the substantially non-crystalline polyester resin to the substantially non-crystalline polyester resin. 3. The card resin composition according to claim 1, wherein said resin composition is contained in a range of 0.5 to 5.0% by weight.

4. Add a granular or plate-like inorganic filler having an average particle size of 3 to 10 μm to the substantially non-crystalline polyester-based resin. The card resin composition according to claim 1 or 2, wherein the resin composition is contained in an amount of from 10 to 10% by weight.

5. Into the substantially non-crystalline polyester resin, a granular or plate-like inorganic filler having an average particle size of 3 to 10 m is added to the substantially non-crystalline polyester resin. The card resin composition according to claim 1 or 2, wherein the resin composition is contained in an amount of from 10 to 10% by weight.

6. The non-crystalline polyester resin is a polyester resin obtained by dehydrating and condensing a mixture of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol. A resin composition for a card according to any one of Items 1 to 5.

7. The card resin composition according to any one of claims 2 to 6. A sheet characterized by the following.

8. A force plate comprising a layer comprising the resin composition for a card according to any one of claims 2 to 6.

9. The resin composition for a card comprises a substantially non-crystalline polyester resin, polyethylene glycol and sodium alkyl benzene sulfonate in a weight ratio.

1 Z is a resin composition in which a mixture of 9 to 9/1 is added in a range of 0.1% by weight to 1.5% by weight, and two layers of the resin composition are included. The card according to claim 8, which is characterized by the features.

10. In a card having an oversheet as an outermost layer and a core sheet as an inner layer, the core sheet is substantially made of an amorphous polyester resin, and the oversheet has a glass transition temperature of 9. A card comprising a resin composition having a temperature of 0 to 140 ° C.

11. The card according to claim 10, wherein the oversheet is made of a polycarbonate-based resin.

12. The non-crystalline polyester resin is a polyester resin obtained by dehydrating and condensing a mixture of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol. A card according to either paragraph 10 or paragraph 11.