JP2002001891A - Multilayered polyester sheet and card comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayered polyester sheet used in a card such as a magnetic card or an IC card excellent not only in embossing processability but also in heat resistance and impact resistance, and the card comprising the same. SOLUTION: The multilayered polyester sheet is formed by laminating two or more sheets. At least one layer thereof is a sheet A comprising a thermoplastic resin composition prepared by compounding (a) amorphous polyester and (b) aromatic polycarbonate so that a weight ratio (a)/(b) becomes 10/90-80/20, and at least one layer thereof is a sheet B comprising a thermoplastic resin composition prepared by compounding 2-25 pts.wt. of (c) an inorganic lamellar filler with 100 pts.wt. of a thermoplastic resin component. A weight ratio (a)/(b) of (a) amorphous polyester and (b) aromatic polycarbonate is 85/15-100/0.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer polyester sheet which is excellent in embossability and is excellent in heat resistance and impact resistance and is used for cards such as magnetic cards and IC cards, and a card comprising the same.

[0002]

2. Description of the Related Art In recent years, cards such as magnetic cards and IC cards in which symbols and characters are three-dimensionally engraved by embossing have been widely used. As these materials, a multilayer sheet made of a rigid polyvinyl chloride resin is generally used. However, polyvinyl chloride resin has poor heat resistance,
There is a case where the card material is deformed when exposed to a high temperature such as being left in a car in the middle of summer, and an embossable card material having excellent heat resistance has been demanded.

[0003] 1,4-Cyclohexanedimethanol derivative copolymerized polyester is one of the resins having good embossability, and its application to card applications is being studied.
However, since 1,4-cyclohexanedimethanol derivative copolymerized polyester does not have high heat resistance, a method of improving heat resistance by blending with a polymer having a high glass transition temperature has been considered.

Japanese Patent Application Laid-Open No. 11-1607 discloses that an inorganic plate-like filler is added to one or more thermoplastic resin compositions selected from polyesters and aromatic polycarbonates for the purpose of improving embossability. The illustrated thermoplastic resin composition is shown. However, although the embossability is improved in these compositions, when the blending amount of the aromatic polycarbonate is increased for the purpose of improving the heat resistance, the embossability is reduced, and the heat resistance and the embossability are compatible. Was difficult.

[0005] In any of these blends, a stain-like surface defect that becomes partially matte may occur at the contact surface with the mold surface during heating and laminating. Therefore, improvements in work efficiency and yield have been desired.

[0006]

SUMMARY OF THE INVENTION The present invention provides a multilayer polyester sheet which is excellent in embossability and excellent in heat resistance and impact resistance and which is used for cards such as magnetic cards and IC cards, and a card comprising the same. thing,
It is another object of the present invention to provide a multilayer polyester sheet having a good surface appearance without stain-like surface defects and a card comprising the same.

[0007]

DISCLOSURE OF THE INVENTION The present inventors have developed a multilayer polyester sheet and a card comprising the same, which are excellent in embossability, heat resistance and impact resistance, and are used for cards such as magnetic cards and IC cards. As a result of intensive studies to provide, the weight ratio (a) / (b) of (a) amorphous polyester and (b) aromatic polycarbonate is 10
/ A: A sheet made of a thermoplastic resin composition blended at a ratio of 90/80/20, (a) an amorphous polyester, and (b)
The weight ratio (a) / (b) with the aromatic polycarbonate is 8
5/15 to 100/0 thermoplastic resin component,
(C) It has been found that the above-mentioned problems can be solved by a multilayer polyester sheet obtained by laminating a sheet B made of a thermoplastic resin composition containing an inorganic plate-like filler and a card made thereof, and the present invention has been completed. . Further, by adding a release agent and / or an inorganic non-plate-like filler to the thermoplastic resin composition constituting the sheet A, a multi-layer polyester having a good surface appearance in which stain-like surface defects are suppressed is provided. The inventors have found that a sheet and a card composed thereof can be obtained, and have completed the present invention.

That is, the present invention provides (1) a multilayer polyester sheet obtained by laminating two or more sheets, wherein at least one layer comprises (a) an amorphous polyester and (b) an aromatic polycarbonate in a weight ratio. (A) / (b) is 10
/ A is a sheet A made of a thermoplastic resin composition blended at a ratio of / 90 to 80/20, and at least one layer is (a)
(C) inorganic plate-like filler 2 with respect to 100 parts by weight of a thermoplastic resin component having a weight ratio (a) / (b) of amorphous polyester and (b) aromatic polycarbonate of 85/15 to 100/0. (2) The thermoplastic resin composition constituting the sheet A is (a) an amorphous polyester; (B) The weight ratio (a) / (b) with the aromatic polycarbonate is 10/90 to 8
0/20 of 100 parts by weight of the thermoplastic resin component,
Further, (c) a thermoplastic resin composition containing 2 to 25 parts by weight of an inorganic plate-like filler, wherein the multilayer polyester sheet according to the above (1), (3) sheet A
(1) to (4), wherein the total thickness of the layers consisting of
(2) The multilayer polyester sheet according to any one of the above,
(4) The multilayer polyester sheet according to any one of the above (1) to (3), wherein the total thickness of the layers comprising the sheet B is in the range of 20 to 95% of the total sheet thickness. , (5) wherein the component (c) is at least one selected from talc and kaolin, wherein the multilayer polyester sheet according to any one of the above (1) to (4), At least one of the multilayer polyester sheets according to any one of the above (1) to (5), wherein at least one of the surface layers is made of the sheet A. The multilayer polyester sheet according to any one of the above (1) to (6), wherein the thermoplastic resin composition constituting the surface layer comprising the sheet A comprises (a) an amorphous polyester and (b) an aromatic polyester. Tribal polycarbonate 100 parts by weight of the total amount of the thermoplastic resin component, further (d) is a release agent 0.0 consisting of
The multilayer polyester sheet according to any one of the above (6) to (7), which is a thermoplastic resin composition to which 1 to 5 parts by weight is added, and (9) a surface layer comprising a sheet A. The thermoplastic resin composition further comprises (e) an inorganic non-plate-like filler in an amount of 0.1 part by weight based on 100 parts by weight of the total amount of the thermoplastic resin component composed of (a) the amorphous polyester and (b) the aromatic polycarbonate. The multilayer polyester sheet according to any one of the above (6) to (8), which is a thermoplastic resin composition obtained by adding 1 to 10 parts by weight, (10) and (e) an inorganic non-plate-like filler. Has an average particle size of 0.
5 to 50 μm granular inorganic filler and an average fiber diameter of 0.
(11) The multilayer polyester sheet according to the above (9), which is one or more inorganic non-plate-like fillers selected from fibrous inorganic fillers of 5 to 50 μm.
(A) The component (a) contains an amorphous polyester comprising a dicarboxylic acid unit mainly composed of terephthalic acid units, and a glycol unit mainly composed of ethylene glycol units and 1,4-cyclohexanedimethanol units. The multilayer polyester sheet according to any one of 1) to (10), wherein the component (12) (a) has a molar ratio of ethylene glycol unit (I) and 1,4-cyclohexanedimethanol unit (II) [(I) / (II)], wherein the multilayer polyester sheet according to any one of the above (1) to (11), wherein the component (13) (a) is (1-1). ) The molar ratio (I) / (II) of ethylene glycol unit (I) to 1,4-cyclohexanedimethanol unit (II) is 1
And (1-2) an amorphous polyester having a molar ratio (I) / (II) of ethylene glycol unit (I) and 1,4-cyclohexanedimethanol unit (II) of less than 1 (14) The multilayer polyester sheet according to any one of the above (1) to (12), and (14) the above (1) to (13).
A card comprising the multilayer polyester sheet according to any one of the above.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the amorphous polyester of the component (a) used in the sheet A and the sheet B refers to a crystal obtained when the temperature is lowered from the molten state at a rate of 10 ° C./min by a differential scanning calorimeter. Polyester having a calorific value of 5 cal / g or less. Specific examples of the amorphous polyester as the component (a) include terephthalic acid, isophthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,5-
Naphthalenedicarboxylic acid, methyl terephthalic acid, 4,
4′-biphenyldicarboxylic acid, 2,2′-biphenyldicarboxylic acid, 1,2′-bis (4-carboxyphenoxy) -ethane, succinic acid, adipic acid, suberic acid,
Azelaic acid, sebacic acid, dodecanedioic acid, octadecanedicarboxylic acid, dimer acid, 1,4-cyclohexanedicarboxylic acid and the like are used, and ethylene glycol, propylene glycol, butanediol, 1,5-pentanediol, , 6-hexanediol, 1,8-octanediol, 1,10-
Decanediol, 1,4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,2-cyclohexanedimethanol, and 2,2-bis (2 ′
(Hydroxyethoxyphenyl) propane and the like.

Among them, a dicarboxylic acid unit mainly composed of a terephthalic acid unit, an ethylene glycol unit and 1,4-
Amorphous polyesters composed of glycol units mainly composed of cyclohexanedimethanol units (hereinafter sometimes referred to as 1,4-cyclohexanedimethanol derivative copolymerized polyesters) are preferred. In particular, ethylene glycol units (I) and 1,4- Amorphous polyesters having a molar ratio [(I) / (II)] of cyclohexanedimethanol units (II) of 1 or more are preferred.

As the amorphous polyester of the component (a),
Two or more amorphous polyesters may be blended and used, and in this case, ethylene glycol unit (I)
An amorphous polyester having a molar ratio [(I) / (II)] of 1 or more to 1,4-cyclohexanedimethanol unit (II), and ethylene glycol unit (I) and 1,4
It is preferable to blend and use an amorphous polyester having a molar ratio [(I) / (II)] of -cyclohexanedimethanol unit (II) of less than 1, since heat resistance is particularly improved.

Above all, when the amorphous polyester having a molar ratio [(I) / (II)] of ethylene glycol unit (I) and 1,4-cyclohexanedimethanol unit (II) of 1 or more is used. The upper limit of [(I) / (II)] is not particularly limited, but is preferably 99 or less. When an amorphous polyester having a molar ratio [(I) / (II)] of ethylene glycol unit (I) and 1,4-cyclohexanedimethanol unit (II) of less than 1 is used, the lower limit is not particularly limited. But 1/99
It is preferable that it is above.

Further, a polyester having a molar ratio [(I) / (II)] of ethylene glycol unit (I) and 1,4-cyclohexanedimethanol unit (II) of 1 or more and ethylene glycol unit (I) and 1,4 The molar ratio of 4-cyclohexanedimethanol units (II) [(I) /
(II)] A preferable blending ratio in the case of using an amorphous polyester which is smaller than 1 / amorphous polyester having a molar ratio [(I) / (II)] of 1 or more / a molar ratio [(I) / (II)] is less than 1, the amorphous polyester (weight ratio) is 5/95 to 95/5,
Further, it is preferably 30/70 to 90/10,
Particularly, the ratio is preferably 40/60 to 80/20.

[0014] The production method when the 1,4-cyclohexanedimethanol derivative copolymerized polyester is used as the component (a) is not particularly limited. For example, in the presence or absence of a catalyst such as an organic titanium compound. A method obtained by polycondensing terephthalic acid or its lower alkyl ester with 1,4-cyclohexanedimethanol and ethylene glycol. As the polymerization conditions, for example, the conditions described in U.S. Pat. No. 2,901,466 can be applied.

1, which is preferably used as component (a)
The 4-cyclohexanedimethanol derivative copolymerized polyester has an acid component of isophthalic acid, orthophthalic acid, 2,6 or less in a range not impairing the effects of the present invention, usually in a range of 20 mol% or less, preferably 10 mol% or less. -Naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, methyl terephthalic acid, 4,4'-biphenyldicarboxylic acid, 2,2'-
Biphenyldicarboxylic acid, 1,2'-bis (4-carboxyphenoxy) -ethane, succinic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, dodecandionic acid, octadecanedicarboxylic acid, dimer acid, and 1,4- Other dicarboxylic acids such as cyclohexanedicarboxylic acid, and glycol components such as propylene glycol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol, 1,3 -Cyclohexanedimethanol,
1,2-cyclohexanedimethanol and 2,2-
Those obtained by copolymerizing other glycols such as bis (2'-hydroxyethoxyphenyl) propane can also be used.

In the present invention, the aromatic polycarbonate of the component (b) used in the sheet A and the sheet B includes:
Bisphenol A, that is, one selected from 2,2'-bis (4-hydroxyphenyl) propane, 4,4'-dihydroxydiphenylalkane or 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxydiphenylether Preferred are those using the above as a main raw material, and particularly preferable are those produced using bisphenol A, that is, 2,2′-bis (4-hydroxyphenyl) propane as a main raw material. Specifically, a polycarbonate obtained by using the above bisphenol A or the like as a dihydroxy component and by a transesterification method or a phosgene method is preferable. Further, a part of bisphenol A, preferably 10 mol% or less, is
Those substituted with dihydroxydiphenylalkane, 4,4'-dihydroxydiphenylsulfone, 4,4'-dihydroxydiphenylether and the like are also preferable.

The sheet A in the present invention is a thermoplastic resin comprising (a) an amorphous polyester and (b) an aromatic polycarbonate in a weight ratio (a) / (b) of 10/90 to 80/20. It consists of a composition. When the weight ratio (a) / (b) of the component (a) and the component (b) is too small, the heat-fusibility at the time of lamination by heating is inferior. . Further, in order to balance heat fusion and heat resistance more highly, the weight ratio (a) / (b) of the component (a) and the component (b) should be 30.
The range is preferably from / 70 to 75/25, more preferably from 35/65 to 70/30.

In the thermoplastic resin composition constituting the sheet A, (c) is further added to the thermoplastic resin component.
Mixing the inorganic plate-like filler as a component is effective in further improving embossability. The inorganic plate-like filler of the component (c) is a so-called plate-like inorganic filler, and is preferably a filler having a three-dimensionally anisotropic particle shape and biaxial orientation. Specific examples include talc, kaolin, mica, sericite, basic magnesium carbonate, aluminum hydroxide, glass flake, and the like. Two or more of these fillers may be used in combination. Of these, talc and kaolin are preferred, and talc is most preferred.

When the inorganic plate-like filler (c) is added to the thermoplastic resin composition constituting the sheet A, the amount added is usually the amount of the thermoplastic resin component (component (a) and component (b)) in the sheet. The total amount is preferably 2 to 25 parts by weight with respect to 100 parts by weight in view of the effect of improving embossability and impact resistance, and particularly preferably 2 to 15 parts by weight.

The average particle size of the inorganic plate-like filler is preferably 0.5 to 20 μm before the compounding, and more preferably 1 to 10 μm.
m is more preferred. Within this range, sheet and card formability is good, and the effect of improving embossability is high.
Also excellent in transparency.

The average particle size of the inorganic plate-like filler can be determined by measuring the particle size at a stacking rate of 50% by the Andreazen pipette method using a centrifugal sedimentation type particle size distribution analyzer.

The average particle size of the inorganic plate-like filler is preferably within the above-mentioned range even at the stage after compounding, and the average particle size of the inorganic plate-like filler after compounding is the thermoplastic resin of the present invention. After treating the composition with an organic solvent or burning it in an electric furnace or the like, the particle size (average of major axis and minor axis) of 100 samples is measured for the obtained inorganic plate-like filler component by an enlarged photograph using an electron microscope. It can be obtained by averaging it.

These fillers include isocyanate compounds, organic silane compounds, organic titanate compounds,
The surface may be treated with a coupling agent such as an organic borane compound or an epoxy compound.

The sheet B used in the present invention comprises a thermoplastic resin component 100 having a weight ratio (a) / (b) of (a) amorphous polyester to (b) aromatic polycarbonate of 85/15 to 100/0. It is composed of a thermoplastic resin composition obtained by mixing (c) 2 to 25 parts by weight of an inorganic plate-like filler with respect to parts by weight.

The thermoplastic resin component in the sheet B of the present invention may comprise the component (a) alone or any of the components (a) and (b), but the component (a) alone is more preferred. This is preferable because the effect of improving embossability is large. The weight ratio (a) / (b) of the component (a) to the component (b) is 8
It is necessary to be 5/15 to 100/0. If the weight ratio (a) / (b) of the component (a) and the component (b) is too small, the effect of improving the embossability is poor, which is not preferable.

In the present invention, it is necessary to mix the inorganic plate-like filler (c) with the thermoplastic resin component in the sheet B in order to further improve embossability. As the inorganic plate-like filler of the component (c), those similar to the inorganic plate-like filler in the sheet A can be mentioned, and the same thing is preferably used.

The amount of addition of the inorganic plate-like filler (c) in the thermoplastic resin composition constituting the sheet B is 10% of the thermoplastic resin component (the sum of the components (a) and (b)) in the sheet.
2 to 25 parts by weight, preferably 2 to 15 parts by weight, based on 0 parts by weight. If the amount is too small, the effect of improving the embossability decreases, and if it is too large, the impact resistance decreases, which is not preferable. In particular, the addition amount of at least one of the sheets A and B is preferably 2 to 10 parts by weight, and the addition amount of any one of the sheets A and B is 2 to 10 parts by weight.
More preferably, it is 10 parts by weight. Within this range, the impact resistance is excellent, the effect of improving the embossability is high, and the transparency is also excellent.

The preferred average particle size of the inorganic plate-like filler is the same as that of the sheet A.

Further, the laminated form of the multilayer sheet of the present invention is as follows:
It is a multilayer sheet formed by laminating two or more sheets. At least one layer must be the sheet A and at least one layer is the sheet B in order to obtain excellent embossability and heat resistance.

The total thickness of the layer comprising the sheet A used in the present invention is 5 to 40% with respect to the total sheet thickness so that excellent heat resistance is obtained and the adverse effect on the embossability is reduced. The range is preferably in the range, and in order to more highly balance the heat resistance and the embossing property, the range is preferably 10 to 30%.

The total thickness of the layer comprising the sheet B used in the present invention is 20 to 95% of the total sheet thickness so that excellent embossability can be obtained and the adverse effect on heat resistance is reduced. Is preferable, and
In order to balance heat resistance and embossability more highly, the range of 70 to 90% is preferable.

In the case of three or more layers, a structure in which sheets B are laminated on both sides of sheet A, two or more sheets A are laminated,
Any structure such as a structure in which sheets B are laminated on both sides thereof, a multilayer structure in which sheets A and B are alternately laminated and sheets B are laminated on both sides may be used, but at least one of the surface layers may be constituted by sheet A. It is more preferable from the viewpoint of improving heat resistance, and it is more preferable that both of the surface layers are formed of the sheet A. In addition, an adhesive layer or a layer made of another material may be provided between the respective layers as needed. Further, each layer may be printed or a magnetic material may be applied. Such a magnetic layer may be the entire surface of the sheet or a part of the sheet such as a stripe.

In a preferred embodiment of the present invention, in which at least one of the surface layers is composed of sheet A and in which both of the surface layers are composed of sheet A, the surface appearance of the mold contact surface is more excellent. Therefore, in the thermoplastic resin composition constituting the surface layer composed of the sheet A,
Further, it is preferable to add (d) a release agent.

Examples of the releasing agent of the component (d) include phosphoric acid or phosphites, higher fatty acid monoesters, higher fatty acids or metal salts thereof, ethylenebisamide compounds, low molecular weight polyolefins and the like. It is preferable to include one or more kinds. Among the release agents, phosphoric acid or phosphites, higher fatty acid monoesters, higher fatty acids or metal salts thereof, low molecular weight polyolefins, and the like are preferable, and phosphoric acid or phosphites are particularly preferable.

As the phosphoric acid or phosphite, diisopropyl phosphate, diisopropyl phosphite,
Dibutyl phosphate, dibutyl phosphite, dioctyl phosphate, dioctyl phosphite, di (meth) acryloyloxyethyl phosphate, di (meth) acryloyloxyethyl phosphite, monoisopropyl phosphate, monoisopropyl phosphite, Monobutyl phosphate, monobutyl phosphite, monooctyl phosphate, monooctyl phosphite, mono (meth) acryloyloxyethyl phosphate, mono (meth) acryloyloxyethyl phosphite and the like can be mentioned. It is also possible to use it.

The amount of the release agent of the component (d) is usually the sum of (a) the amorphous polyester constituting the sheet A and (b) the thermoplastic resin comprising the aromatic polycarbonate (the component (a) and ( The amount is preferably in the range of 0.01 to 5 parts by weight, and more preferably in the range of 0.1 to 2 parts by weight, based on 100 parts by weight of the total component (b). If the amount is small, the resin composition adheres to a metal plate or a mold during card production and the surface appearance deteriorates. If too large, the thermal stability of the resin composition deteriorates, which is not preferable.

Further, in order to provide an excellent surface appearance of the contact surface of the mold and to impart a slipperiness at the time of forming the sheet to improve the winding property, the thermoplastic resin composition constituting the surface layer made of the sheet A is used. It is effective to further add (e) an inorganic non-plate-like filler. When the sheet requires transparency, the sum of the (a) amorphous polyester and (b) the thermoplastic resin comprising the aromatic polycarbonate constituting the sheet A (the sum of the (a) component and the (b) component) ) The amount of the inorganic non-plate-like filler is preferably in the range of 0.2 to 5 parts by weight, more preferably 0.5 to 3 parts by weight, per 100 parts by weight.

(E) The inorganic non-plate-like filler includes a particulate inorganic filler, a fibrous inorganic filler and the like in particle form, and these can be used alone or in combination of two or more. Average particle size 0.5 to 50 μm before compounding
Granular inorganic filler, and average fiber diameter of 0.5 to 50 μm
Is preferred because of its excellent surface appearance.

The average particle size of the granular inorganic filler can be determined by measuring the particle size at a stacking rate of 50% by the Andreazen pipette method using a centrifugal sedimentation type particle size distribution analyzer.
The average fiber diameter of the fibrous inorganic filler can be determined by measuring the particle diameter of 100 samples using an enlarged photograph by an electron microscope and averaging the number.

It is preferable that the average particle diameter of the granular inorganic filler and the average fiber diameter of the fibrous inorganic filler be within the above ranges at the stage after blending. The average fiber diameter of the inorganic filler is obtained by treating the thermoplastic resin composition with an organic solvent or burning it in an electric furnace or the like, and then obtaining the obtained granular inorganic filler or fibrous inorganic filler by an enlarged photograph by an electron microscope. Number of samples 1
It can be determined by measuring the particle diameter or the fiber diameter of 00 pieces and averaging them.

Specific examples of the above-mentioned granular inorganic filler include silica, alumina, aluminum hydroxide, calcium carbonate, basic magnesium carbonate, magnesium sulfate, barium sulfate, glass beads and the like. More than one kind may be used in combination. Among these, silica is particularly preferred. When transparency is required as the surface layer, crystalline silica is more preferably used because the transparency is relatively small among silica.

Specific examples of the above-mentioned fibrous inorganic filler include wollastenite, bentonite, asbestos fiber,
Asbestos, sepiolite, potassium titanate whisker, aluminum borate whisker, silicon nitride whisker,
Examples thereof include glass fibers, PAN-based and pitch-based carbon fibers, and two or more of these fibrous inorganic fillers may be used in combination. When transparency is required for the surface layer among these, wollastenite is particularly preferably used because the decrease in transparency is relatively small.

These inorganic non-plate-like fillers may be surface-treated with a coupling agent such as an isocyanate compound, an organic silane compound, an organic titanate compound, an organic borane compound and an epoxy compound. .

The thermoplastic resin compositions constituting the sheets A and B of the present invention may further contain various other additives as long as the object of the present invention is not impaired. As these other additives, for example, antioxidants (phosphorous, sulfur-based, etc.), ultraviolet absorbers, heat stabilizers (hindered phenol-based, etc.), lubricants, antistatic agents,
Slip improvers, antiblocking agents, coloring agents including dyes and pigments, flame retardants (halogen, phosphorus, etc.), flame retardant aids (antimony compounds represented by antimony trioxide,
Zirconium oxide, molybdenum oxide, and the like), a foaming agent, a crosslinking agent (for example, a polyvalent epoxy compound, an isocyanate compound, and an acid anhydride). In addition, other synthetic resins (for example, polyamide resin, polystyrene resin,
Acrylic resin, polyethylene resin, ethylene / vinyl acetate copolymer, phenoxy resin, epoxy resin, silicone resin, etc.).

In the thermoplastic resin compositions constituting the sheets A and B used in the present invention, the method of blending the components to be blended is not particularly limited, and can be performed by a known method. As a specific production method, there is a method of uniformly melting and kneading using a single-screw or twin-screw extruder. In addition, what is called a mixture obtained by previously mixing only the component (c), the component (d), and the component (e) with one or two or more kinds of thermoplastic resins selected from the components (a) and (b), respectively, is used. Of course, it is also possible to use a master batch method. As a method of processing into a sheet, a known method such as a T-die method, an inflation method, and a press molding method is used.

The method for laminating the multilayer sheet of the present invention is not particularly limited, and examples thereof include a coextrusion method, a heat lamination method, and a hot melt method.
Any well-known method is used, and among them, the heat lamination method is often used.

The thickness of each layer constituting the multilayer polyester sheet of the present invention is not particularly limited.
It is preferably from about 150 μm to about 150 μm, particularly preferably about 50 μm to 100 μm. About 100 μm to 700 for layers other than the surface layer
μm, and a total thickness of 150 μm to 2000 μm is preferably used, and particularly a total thickness of 600 μm to 900 μm is preferably used.

The method for producing a card comprising the multilayer polyester sheet of the present invention is not particularly limited, and examples thereof include a method of cutting the multilayer polyester sheet of the present invention into a specific size and processing it into a card. Further, the sheet may be subjected to secondary processing such as press molding to be processed into a card shape.

The size of the card made of the multilayer polyester sheet of the present invention is not particularly limited, but the long side is 10 mm.
A rectangular shape having an extension of about 300 mm and a short side extending from 10 mm to 200 mm is preferable, and particularly, a long side having a length of 50 mm.
A rectangular shape having an extension of about 100 mm and a short side of 25 mm to 80 mm is preferable. Especially, the long side is about 85
mm and a rectangular shape having a short side of about 54 mm are more preferable.

The card comprising the multilayer polyester sheet of the present invention is a magnetic card, an IC card, or other JIS X630.
When used for a card conforming to No. 1, if necessary, 2 to 25 parts by weight of titanium oxide is added to the total of 100 parts by weight of the thermoplastic resin component constituting the multilayer polyester sheet of the present invention, so that the sheet is opaque.

The multilayer sheet of the present invention is excellent in heat resistance, embossability and impact resistance, and thus can be suitably used for card applications. The multilayer sheet of the present invention is used for a card, in general, a card capable of recording information such as a magnetic card or an IC card, specifically, a magnetic, electric or optically readable and / or writable card. Can be preferably used for cards such as prepaid cards, credit cards, banking cards, various certification cards, and driver's license cards.

[0052]

EXAMPLES The effects of the present invention will be further described below with reference to examples. a-1: polyester comprising terephthalic acid units, ethylene glycol units and 1,4-cyclohexanedimethanol units, and a molar ratio of ethylene glycol units (I) to 1,4-cyclohexanedimethanol units (II) ( Polyester whose I) / (II) is about 70/30 (“Easter” GN071 manufactured by Eastman Chemical Company) a-2: Polyester composed of terephthalic acid unit, ethylene glycol unit and 1,4-cyclohexanedimethanol unit Wherein the molar ratio (I) / (II) of ethylene glycol unit (I) to 1,4-cyclohexanedimethanol unit (II) is about 35/65 (manufactured by Eastman Chemical Co., Ltd.) Easter "DN003) b: Aromatic polycarbonate (Mitsubishi Zinnia ring Plastics Co., Ltd. "Iupilon®" S300
0) c: Talc (talc having an average particle diameter of 1.4 μm, LMS-300 manufactured by Fuji Talc Co., Ltd.) d: Phosphoric ester release agent (“Mold With” INT-33UDK manufactured by AXEL) e: Wallacetenite (NYCO, "NYAD
G "fibrous inorganic filler having an average fiber diameter of 40 µm) Examples 1 to 6, Comparative Examples 1 to 7 Raw materials having the compounding ratios shown in Table 1 were dry-blended using a V blender, and then mixed at a temperature of 250 ° C. Supplied to a screw extruder, discharged from T-die, thickness 100μm
And a sheet of 300 μm were obtained.

Further, the above 100 μm and 300 μm sheets were converted to 100/300/300 /
After stacking in order of 100 μm (“/” represents lamination), the resultant was subjected to a press molding machine, heat-fused under the conditions of a temperature of 130 ° C., a pressure of 1 MPa, and a holding time of 10 minutes.
Cooling was performed under the conditions of MPa and a holding time of 5 minutes to obtain a multilayer sheet. Further, the sheet was press-formed using a card punching die to obtain a card conforming to JIS X6301.

The average particle size of the talc after blending was determined by burning the above-mentioned sheet in an electric furnace at 600 ° C. for 5 hours to separate talc, and then measuring the number of samples by an electron microscope as 1 sample.
The particle size (average diameter of the major axis and the minor axis) of 00 talc was measured, and the number was averaged to obtain the average particle diameter. As a result, no significant change in the average particle size of talc was observed before and after the compounding.

As an index of embossability, a manual embosser (NE-160 manufactured by Nippon Kenken Co., Ltd.)
0), embossed characters are engraved over three lines, and J
Card warpage was measured according to ISX6301.

Further, as an index of heat resistance, a test piece cut into a strip of 85 mm × 20 mm from the above-mentioned card was fixed in a cantilever state so that the test piece was horizontal while holding one end of the test piece at 20 mm. , 80, 90, 100, 1
After being left in an oven at 10 ° C. for 60 minutes, the vertical distance at which the tip opposite to the held portion was sagged by its own weight was measured. Next, the sagging vertical distance and the temperature at each temperature were plotted, each point was connected with a straight line, and the temperature that intersected the sagging vertical distance of 3 mm was defined as the heat-resistant temperature.

Further, in a tensile impact test as an index of impact resistance, a test piece was taken from the above card by a punching press, and
Measured according to ASTM D1822.

[0058]

[Table 1]

[0059]

[Table 2]

It can be seen that the multilayer polyester sheet of the present invention and the card comprising the same are excellent in embossability, heat resistance and impact resistance.

Examples 10 to 17 Raw materials having the compounding ratios shown in Tables 1 and 3 were dry-blended using a V blender.
The mixture was supplied to an axial screw extruder and discharged from a T-die to obtain sheets A7 to A13 having a thickness of 100 µm and a sheet B1 having a thickness of 300 µm.

Further, the above 100 μm and 300 μm sheets were converted to 100/300/300 /
After stacking in order of 100 μm (“/” represents lamination), the resultant was subjected to a press molding machine, heat-fused under the conditions of a temperature of 130 ° C., a pressure of 1 MPa, and a holding time of 10 minutes.
Cooling was performed under the conditions of MPa and a holding time of 5 minutes to obtain a multilayer sheet. Further, a card conforming to JIS X6301 was obtained from the same sheet by press molding using a card punching die.

The average particle diameter of talc after mixing and the average fiber diameter of wollastonite were determined by burning the above-mentioned sheet in an electric furnace at 600 ° C. for 5 hours to separate talc and wollastenite, followed by enlargement with an electron microscope. Measure the particle size (average diameter of major axis and minor axis) of talc and the fiber diameter of wollastenite in the number of 100 samples in the photograph, and average the numbers of each. I asked. As a result, the average particle size of talc before and after blending,
No significant change in average fiber diameter of wollastenite was observed.

The card comprising the multilayer sheet thus obtained was measured for card warpage, heat resistance temperature and tensile impact strength in the same manner as in Examples 1 to 9. As an index of the surface appearance, the surface appearance at the time of peeling off from the mold (made of SUS) is visually determined at the time of producing the multilayer sheet, and when producing ten multilayer sheets, spot-like defects are found on the surface. Table 4 also shows the number of multilayer sheets observed.

[0065]

[Table 3]

[0066]

[Table 4]

By further adding a release agent and an inorganic non-plate-like filler to the thermoplastic resin composition constituting the multilayer polyester sheet of the present invention and a card comprising the same, embossability, heat resistance and impact resistance are obtained. It can be seen that the adhesiveness is excellent and the surface appearance of the contact surface with the mold is improved.

[0068]

The multilayer sheet of the present invention and a card comprising the same have excellent embossability, heat resistance and impact resistance when used for cards such as magnetic cards and IC cards.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 7/00 C08K 7/00 7/04 7/04 C08L 67/02 C08L 67/02 69/00 69 / 00 // (C08L 67/02 (C08L 67/02 69:00) 69:00) F term (reference) 2C005 HA10 HA30 HB03 HB04 HB09 MA11 MA40 MB02 MB08 4F100 AA00A AA00B AA00C AC10A AC10B AC10C AK41A AK41B AK41B AK42B AK42B AK42B AK45A AK45B AK45C AL01A AL01B AL05A AL05B AL05C BA02 BA03 BA04 BA05 BA06 BA07 BA10A BA10B BA16 CA23A CA23B CA23C CA30A CA30C DE01A DE01B DE01C DG01A DG01B EH20 GB71 HB21 JA12A JA12B JA12C JA20A JA20B JA20C JB16A JB16B JJ03 JK10 JL01 YY00A YY00B YY00C 4J002 CF06W CF061 CG01X CG012 CG02X CG022 DA017 DE146 DE147 DE187 DE237 DE266 DE267 DG047 DJ006 DJ007 DJ017 DJ027 DJ036 DJ046 DJ056 DK007 DL006 DL007 FA016 FA047 FD016 FD017 FD030 FD130 FD140 GF00 GS00

Claims (14)

[Claims] 1. A multilayer polyester sheet obtained by laminating two or more sheets, wherein at least one layer comprises (a)
Sheet A comprising a thermoplastic resin composition obtained by blending amorphous polyester and (b) an aromatic polycarbonate in a weight ratio (a) / (b) of 10/90 to 80/20,
Further, at least one layer comprises (a) an amorphous polyester and (b)
The weight ratio (a) / (b) with the aromatic polycarbonate is 8
The sheet B is made of a thermoplastic resin composition in which (c) 2 to 25 parts by weight of an inorganic plate-like filler is mixed with 100 parts by weight of a thermoplastic resin component of 5/15 to 100/0. Characterized multilayer polyester sheet. 2. The thermoplastic resin composition constituting the sheet A has a weight ratio (a) / (b) of (a) amorphous polyester to (b) aromatic polycarbonate of 10/90 to 80/20.
2. The multilayer polyester according to claim 1, wherein the thermoplastic resin composition further comprises (c) 2 to 25 parts by weight of an inorganic plate-like filler based on 100 parts by weight of the thermoplastic resin component. Sheet. 3. The multilayer polyester sheet according to claim 1, wherein the total thickness of the layers comprising the sheet A is in the range of 5 to 40% of the total sheet thickness. 4. The multilayer polyester sheet according to claim 1, wherein the total thickness of the layers comprising the sheet B is in the range of 20 to 95% of the total sheet thickness. 5. The method according to claim 1, wherein the component (c) is at least one selected from talc and kaolin.
The multilayer polyester sheet according to any one of the above. 6. The multilayer polyester sheet according to claim 1, wherein at least one of the surface layers comprises a sheet A. 7. The multilayer polyester sheet according to claim 1, wherein all of the surface layers are made of sheet A. 8. The thermoplastic resin composition constituting the surface layer composed of the sheet A is based on 100 parts by weight of the total amount of the thermoplastic resin component composed of (a) the amorphous polyester and (b) the aromatic polycarbonate. Furthermore, (d) a releasing agent is added to 0.01
The multilayer polyester sheet according to any one of claims 6 to 7, which is a thermoplastic resin composition to which about 5 parts by weight is added. 9. The thermoplastic resin composition constituting the surface layer comprising the sheet A is based on 100 parts by weight of the total amount of the thermoplastic resin component comprising (a) the amorphous polyester and (b) the aromatic polycarbonate. The multilayer polyester sheet according to any one of claims 6 to 8, further comprising (e) a thermoplastic resin composition obtained by adding 0.1 to 10 parts by weight of an inorganic non-plate-like filler. 10. The inorganic non-plate-like filler is one selected from a particulate inorganic filler having an average particle size of 0.5 to 50 μm and a fibrous inorganic filler having an average fiber diameter of 0.5 to 50 μm. The multilayer polyester sheet according to claim 9, wherein the multilayer polyester sheet is two or more inorganic non-plate-like fillers. (11) The component (a) contains an amorphous polyester comprising a dicarboxylic acid unit mainly composed of terephthalic acid units and a glycol unit mainly composed of ethylene glycol units and 1,4-cyclohexanedimethanol units. The multilayer polyester sheet according to any one of claims 1 to 10, wherein: 12. Component (a) is composed of ethylene glycol unit (I) and 1,4-cyclohexanedimethanol unit (I).
The multilayer polyester sheet according to any one of claims 1 to 11, wherein the multilayer polyester sheet comprises an amorphous polyester having a molar ratio [(I) / (II)] of 1 or more. 13. The composition of claim 1, wherein the component (a) comprises (1-1) a molar ratio (I) / (II) of ethylene glycol unit (I) to 1,4-cyclohexanedimethanol unit (II) of 1 or more. And (1-2) an amorphous polyester having a molar ratio (I) / (II) of ethylene glycol unit (I) to 1,4-cyclohexanedimethanol unit (II) of less than 1. The multilayer polyester sheet according to any one of claims 1 to 12, wherein 14. A card comprising the multilayer polyester sheet according to claim 1.