Resin composition for cards or passports, film for cards or passports, cards, and passports

Abstract

To provide a resin composition for a card or passport which is excellent in heat resistance while improving low temperature fusion property and solvent resistance, and has a small dimensional change when a card or a passport is manufactured.SOLUTION: A resin composition for a card or passport contains a resin component containing a polyester resin (A-1) and a polycarbonate resin (B), wherein the polyester resin (A-1) includes a structural unit derived from a chain dihydroxy compound, and a glass transition temperature of the polyester resin (A-1) is 90°C or higher.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a resin composition for cards or passports, a film for cards or passports, a card, and a passport.

Background Art

[0002] Cards such as credit cards, cash cards, ID cards, tag cards, and insurance cards are generally manufactured by overlapping a plurality of resin sheets, heat-sealing them, and punching them. Similarly, passports are generally manufactured by overlapping a plurality of resin sheets. In the resin sheets used for cards or passports, a thermoplastic resin composition containing a thermoplastic resin such as polyester or aromatic polycarbonate as a resin component is often used.

[0003] For example, Patent Document 1 discloses a thermoplastic resin composition for cards, which is a blend of one or more thermoplastic resins selected from polyester and aromatic polycarbonate and an inorganic plate-like filler. In Patent Document 1, as the polyester, a polyester in which the molar ratio (I) / (II) of the glycol unit is 70 / 30 between the ethylene glycol unit (I) and the 1,4-cyclohexanedimethanol unit (II), or a polyester in which the molar ratio (I) / (II) of the ethylene glycol unit (I) and the 1,4-cyclohexanedimethanol unit (II) is 35 / 65 is used. Patent Document 1 further shows a resin composition in which these polyesters and aromatic polycarbonate are used in combination.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when manufacturing a card or a passport by heat-sealing a plurality of resin sheets, low-temperature fusibility that enables heat-sealing at a low temperature may be required. Further, when the resin sheet has poor heat-sealing property with other sheets, an adhesive is required, or when the resin sheet is provided with an image receiving layer used when printing a face photo or the like, or when design or security printing is performed, the resin sheet comes into contact with ink, and thus solvent resistance is required.

[0006] However, when using an aromatic polycarbonate as the resin component, it is difficult to improve low-temperature fusibility and solvent resistance. On the other hand, although the polyester used in Patent Document 1 has good low-temperature fusibility, its heat resistance is not sufficient, and the sheet formed from the polyester has a large value of heat expansion and contraction rate. Therefore, when laminating a sheet formed from polyester and a sheet having high heat resistance, such as an aromatic polycarbonate sheet, to produce a card or a passport, problems such as a large dimensional change and poor workability, or warping of the produced card or passport may occur. Further, the solvent resistance may be insufficient.

[0007] Further, in Patent Document 1, although the resin composition in which polyester and polycarbonate are used in combination has improved heat resistance compared to that using polyester alone, it is not sufficient, and the solvent resistance is also insufficient.

[0008] Therefore, an object of the present invention is to provide a resin composition for a card or a passport that has good low-temperature fusibility and solvent resistance, excellent heat resistance, and a small dimensional change when producing a card or a passport.

Means for Solving the Problems

[0009] As a result of intensive studies, the present inventors have found that the above problems can be solved by using a specific polyester resin (A-1) in combination with a polycarbonate resin (B), and have completed the following present invention. That is, the present invention provides the following [1] to

[12] . [1] A resin composition containing a resin component comprising a polyester resin (A-1) and a polycarbonate resin (B), wherein the polyester resin (A-1) contains a structural unit derived from a chain dihydroxy compound, and the glass transition temperature of the polyester resin (A-1) is 90°C or higher, a resin composition for a card or a passport. [2] The resin composition for a card or a passport according to [1] above, having a storage elastic modulus at 100°C of 1×10 9 Pa or more. [3] The resin composition for a card or a passport according to [1] or [2] above, wherein the polyester resin (A-1) contains a structural unit derived from an alicyclic dihydroxy compound. [4] The polyester resin (A-1) contains a structural unit derived from a chain dihydroxy compound and a structural unit derived from an alicyclic dihydroxy compound, and in a total of 100 mol% of the structural unit derived from the chain dihydroxy compound and the structural unit derived from the alicyclic dihydroxy compound, the proportion of the structural unit derived from the alicyclic dihydroxy compound is more than 65 mol%. The resin composition for a card or a passport according to [3] above. [5] The resin composition for a card or a passport according to any one of [1] to [4] above, wherein the polyester resin (A-1) contains a structural unit derived from ethylene glycol and a structural unit derived from cyclohexanedimethanol. [6] The resin composition for a card or a passport according to any one of [1] to [5] above, wherein the polyester resin (A-1) contains a structural unit derived from ethylene glycol, a structural unit derived from cyclohexanedimethanol, and a structural unit derived from tetramethylcyclobutanediol. [7] The content ratio ((A-1) / (B)) of the polyester resin (A-1) and the polycarbonate resin (B) is 3 / 97 or more and 97 / 3 or less by mass ratio, and the resin composition for cards or passports according to any one of [1] to [6] above. [8] The resin composition for cards or passports according to any one of [1] to [7] above, which contains recycled raw materials. [9] A film for cards or passports comprising the resin composition according to any one of [1] to [8] above.

[10] A card comprising the film according to [9] above.

[11] A passport comprising the film according to

[10] above.

[12] A method for producing the resin composition according to any one of [1] to [8] above, which comprises blending recycled raw materials into the resin composition. [Advantages of the Invention]

[0010] In the present invention, it is possible to provide a resin composition for cards or passports that has excellent heat resistance while having good low-temperature fusion properties and solvent resistance, and has a small dimensional change when producing cards or passports. [Brief Description of the Drawings]

[0011]

Figure 1

Figure 2

[0012] Hereinafter, the present invention will be described in detail with reference to embodiments. However, the present invention is not limited to the embodiments described below. In addition, the terms "film" and "sheet" used in the following description are not clearly distinguished, and when referred to as "film", it includes "sheet", and when referred to as "sheet", it includes "film".

[0013] <Resin composition for cards or passports> The resin composition of the present invention is a resin composition for cards or passports, and contains a resin component including a polyester resin (A-1) and a polycarbonate resin (B).

[0014] [Polyester resin (A-1)] The polyester resin (A-1) contains a structural unit derived from a chain dihydroxy compound and has a glass transition temperature of 90°C or higher. Since the polyester resin (A-1) has a glass transition temperature of 90°C or higher, when used in combination with the polycarbonate resin (B) described later, it has excellent heat resistance, and the dimensional change when heating a film or the like formed from the resin composition becomes small. Therefore, the workability when manufacturing a card or a passport becomes good, and further, warping or the like hardly occurs in the manufactured card or passport. In addition, since the polyester resin (A-1) contains a structural unit derived from a chain dihydroxy compound, the low-temperature fusion property of the resin composition tends to be good. Furthermore, since the resin composition contains the polyester resin (A-1), the solvent resistance is also good. Also, when the resin composition contains a colorant described later, the laser printability and the like also tend to be good.

[0015] The polyester resin (A-1) is a polyester obtained by polycondensing a dicarboxylic acid and a dihydroxy compound. Note that, as the dicarboxylic acid, dicarboxylic acid derivatives such as esters of dicarboxylic acids and acid halides may be used in the synthesis of the polyester resin (A-1). From the viewpoint of heat resistance, it is preferable to use an aromatic dicarboxylic acid as the dicarboxylic acid used to obtain the polyester resin (A-1). Therefore, the polyester resin (A-1) preferably contains a structural unit derived from an aromatic dicarboxylic acid. There are no particular restrictions on the aromatic dicarboxylic acid, and examples include terephthalic acid, isophthalic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, naphthalene-1,5-dicarboxylic acid, anthracene dicarboxylic acid, 4,4'-diphenyldicarboxylic acid, 4,4'-diphenylether dicarboxylic acid, 5-sulfoisophthalic acid, sodium 3-sulfoisophthalate, 2-chloroterephthalic acid, 2,5-dichloroterephthalic acid, 2-methylterephthalic acid, etc. Among these, terephthalic acid and isophthalic acid are preferred, and terephthalic acid is more preferred from the viewpoint of transparency. The aromatic dicarboxylic acid may be used alone or in combination of two or more.

[0016] In addition, the polyester resin (A-1) may contain a small amount (usually 40 mol% or less, for example 30 mol% or less, preferably 20 mol% or less) of structural units derived from aliphatic dicarboxylic acids. There are no particular restrictions on the aliphatic dicarboxylic acid, and examples include oxalic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, sebacic acid, azelaic acid, dodecanedioic acid, dimer acid, 1,3 or 1,4-cyclohexanedicarboxylic acid, cyclopentanedicarboxylic acid, 4,4'-dicyclohexyldicarboxylic acid, etc. The aliphatic dicarboxylic acid may be used alone or in combination of two or more.

[0017] The structural units derived from aromatic dicarboxylic acids are preferably contained in an amount of 80 mol% or more, more preferably 90 mol% or more, in the structural units derived from dicarboxylic acids in the polyester resin (A-1). Regarding the upper limit, there is no particular limitation, and it may be 100 mol% or less, but most preferably 100 mol%.

[0018] The chain dihydroxy compound used in the polyester resin (A-1) may be linear or may have a branched structure. Specific examples of the chain dihydroxy compound include chain dihydroxy compounds having about 2 to 18 carbon atoms such as ethylene glycol (EG), diethylene glycol, 1,2-propylene glycol, 1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, triethylene glycol, 1,2-hexadecanediol, 1,18-octadecanediol, and polyglycols such as polytetramethylene ether glycol, polypropylene glycol, and polyethylene glycol. Among these, chain dihydroxy compounds having 2 to 12 carbon atoms are preferred, and more preferably one or more selected from ethylene glycol (EG), diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol. Among them, ethylene glycol (EG) is particularly preferred. The chain dihydroxy compound may be used alone or in combination of two or more.

[0019] The polyester resin (A-1) is preferably a copolymer polyester resin using two or more dihydroxy compounds as copolymerization components. Specifically, in addition to the chain dihydroxy compound, it is preferable to use an alicyclic dihydroxy compound as the dihydroxy compound used to obtain the polyester resin (A-1). Therefore, the polyester resin (A-1) preferably has a structural unit derived from an alicyclic dihydroxy compound in addition to the structural unit derived from the chain dihydroxy compound. By using an alicyclic dihydroxy compound, heat resistance, solvent resistance, laser printability, etc. tend to be good. Specific examples of the alicyclic dihydroxy compound include tetramethylcyclobutanediol, cyclohexanedimethanol (CHDM), tricyclodecanedimethanol, adamantanediol, pentacyclopentadecanedimethanol, and the like. Among these, tetramethylcyclobutanediol and cyclohexanedimethanol are preferred. As for cyclohexanedimethanol, there are 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, and 1,4-cyclohexanedimethanol. From the viewpoint of easy industrial availability, 1,4-cyclohexanedimethanol is preferred. In addition, as tetramethylcyclobutanediol, generally 2,2,4,4-tetramethyl-1,3-cyclobutanediol is used. The alicyclic dihydroxy compound may be used alone or in combination of two or more. As the alicyclic dihydroxy compound, it is preferably used at least cyclohexanedimethanol, and more preferably a combination of tetramethylcyclobutanediol and cyclohexanedimethanol.

[0020] In the polyester resin (A-1), in the total 100 mol% of the structural units derived from the chain dihydroxy compound and the structural units derived from the alicyclic dihydroxy compound, the proportion of the structural units derived from the alicyclic dihydroxy compound is preferably more than 65 mol%. When the proportion of the structural units derived from the alicyclic dihydroxy compound exceeds 65 mol%, the heat resistance becomes excellent, and the storage elastic modulus of the resin composition under a high-temperature environment increases. Therefore, the value of the heat expansion and contraction rate of a film or the like formed from the resin composition of the present invention tends to be low. The above proportion of the structural units derived from the alicyclic dihydroxy compound is more preferably 70 mol% or more, further preferably 80 mol% or more, and even more preferably 90 mol% or more. In addition, from the viewpoint of improving the low-temperature fusion property by containing a certain amount or more of the chain dihydroxy compound, the above proportion of the structural units derived from the alicyclic dihydroxy compound is preferably 99 mol% or less, more preferably 98 mol% or less, and further preferably 95 mol% or less.

[0021] As the dihydroxy compound used in the polyester resin (A-1), a dihydroxy compound other than a chain dihydroxy compound and an alicyclic dihydroxy compound (also referred to as "other dihydroxy compound") may be used as long as the effects of the present invention are not impaired. In the polyester resin (A-1), the content of the structural unit derived from the other dihydroxy compound is, for example, 20 mol% or less, preferably 10 mol% or less, more preferably 5 mol% or less, and most preferably 0 mol% per 100 mol of the structural units derived from the dihydroxy compound in the polyester resin (A-1). Examples of the other dihydroxy compounds include p-xylene diol, 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), tetrabromobisphenol A, tetrabromobisphenol A-bis(2-hydroxyethyl ether), α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene (bisphenol M), 9,9-bis(4-hydroxy-3-methylphenyl)fluorene, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide, 2,2-bis(4-hydroxy-3-methylphenyl)propane (bisphenol C), 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane (bisphenol AF), and 1,1-bis(4-hydroxyphenyl)decane.

[0022] Among the above, the polyester resin (A-1) preferably contains a structural unit derived from ethylene glycol and a structural unit derived from cyclohexanedimethanol, and particularly preferably contains a structural unit derived from ethylene glycol, a structural unit derived from cyclohexanedimethanol, and a structural unit derived from tetramethylcyclobutanediol, from the viewpoints of low-temperature fusibility, heat resistance, solvent resistance, etc.

[0023] In the polyester resin (A-1), the content of the structural unit derived from ethylene glycol is preferably 1 mol% or more, more preferably 2 mol% or more, still more preferably 5 mol% or more, and preferably 30 mol% or less, more preferably 20 mol% or less, still more preferably 10 mol% or less, based on 100 mol% of the structural units derived from dihydroxy compounds. Also, the content of the structural unit derived from cyclohexanedimethanol is preferably 50 mol% or more, more preferably 60 mol% or more, still more preferably 70 mol% or more, and preferably 90 mol% or less, more preferably 85 mol% or less, still more preferably 80 mol% or less, based on 100 mol% of the structural units derived from dihydroxy compounds. Furthermore, the content of the structural unit derived from tetramethylcyclobutanediol is preferably less than the content of the structural unit derived from cyclohexanedimethanol. The content of the structural unit derived from tetramethylcyclobutanediol is preferably 4 mol% or more, more preferably 8 mol% or more, still more preferably 13 mol% or more, particularly preferably 15 mol% or more, and preferably 49 mol% or less, more preferably 38 mol% or less, still more preferably 30 mol% or less, particularly preferably 25 mol% or less, based on 100 mol% of the structural units derived from dihydroxy compounds.

[0024] (Glass transition temperature) As described above, the glass transition temperature (Tg) of the polyester resin (A-1) is 90°C or higher. When the glass transition temperature is less than 90°C, even when the polycarbonate resin (B) is used in combination, the heat resistance is insufficient, the value of the heat expansion rate becomes high, the dimensional stability decreases, and the dimensional change during the production of the card or passport becomes large. Therefore, the workability during the production of the card or passport decreases, or warping occurs in the card or passport. Furthermore, even if the resin composition contains a colorant, it becomes difficult to improve the laser printability. From the viewpoint of enhancing heat resistance and improving dimensional stability, laser printability, etc., the glass transition temperature (Tg) of the polyester resin (A-1) is preferably 93°C or higher, more preferably 95°C or higher, still more preferably 98°C or higher, and even more preferably 100°C or higher. From the viewpoint of heat resistance, the higher the glass transition temperature (Tg) of the polyester resin (A-1), the better. However, from the viewpoint of low-temperature fusion properties, it is better to lower it, preferably 130°C or lower, more preferably 120°C or lower, and still more preferably 115°C or lower. Note that the glass transition temperature can be obtained by performing temperature dispersion measurement of dynamic viscoelasticity on each resin using a viscoelastic spectrometer in accordance with JIS K7244-4:1999, with a strain of 0.07%, a frequency of 1 Hz, a heating rate of 3°C / min, and a tensile mode, and determining the temperature at the peak top of the loss elastic modulus.

[0025] The polyester resin (A-1) is preferably an amorphous polyester. By using an amorphous polyester, the adhesiveness to other members such as resin films is likely to be good. The amorphous polyester may be any polyester that is substantially amorphous. As polyesters that are substantially amorphous (including those with low crystallinity), polyesters that do not show a distinct crystal melting peak during heating by a differential scanning calorimeter (DSC), and polyesters that have crystallinity but a slow crystallization rate and do not become highly crystalline during molding by an extrusion film-forming method or the like, and polyesters that have crystallinity but a low crystal melting heat quantity (ΔHm) of 10 J / g or less observed during heating by a differential scanning calorimeter (DSC) can be used. That is, the amorphous polyester in the present invention also includes "crystalline polyesters in an amorphous state". The polyester resin (A-1) may be used alone or in combination of two or more.

[0026] [Polycarbonate resin (B)] The resin composition of the present invention contains a polycarbonate resin (B) in addition to the above-mentioned polyester resin (A-1) as a resin component. By containing the polycarbonate resin (B), the resin composition of the present invention is excellent in heat resistance in combination with the above-mentioned specific polyester resin (A-1). The polycarbonate resin (B) is not particularly limited, but it is preferable to use a bisphenol-based polycarbonate. By using a bisphenol-based polycarbonate, it is easy to make various mechanical properties and heat resistance excellent.

[0027] The bisphenol-based polycarbonate refers to a polycarbonate in which 50 mol% or more, preferably 70 mol% or more, more preferably 90 mol% or more of the structural units derived from a dihydroxy compound are structural units derived from bisphenol. The bisphenol-based polycarbonate may be either a homopolymer or a copolymer. Further, the bisphenol-based polycarbonate may have a branched structure, a linear structure, or a mixture of a resin having a branched structure and a resin having only a linear structure.

[0028] Specific examples of bisphenol include 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), 1,1-bis(4-hydroxyphenyl)-1-phenylethane (bisphenol AP), 2,2-bis(4-hydroxyphenyl)hexafluoropropane (bisphenol AF), 2,2-bis(4-hydroxyphenyl)butane (bisphenol B), bis(4-hydroxyphenyl)diphenylmethane (bisphenol BP), 2,2-bis(3-methyl-4-hydroxyphenyl)propane (bisphenol C), 1,1-bis(4-hydroxyphenyl)ethane (bisphenol E), bis(4-hydroxyphenyl)methane (bisphenol F), 2,2-bis(4-hydroxy-3-isopropylphenyl)propane (bisphenol G), 1,3-bis(2-(4-hydroxyphenyl)-2-propyl)benzene (bisphenol M), bis(4-hydroxyphenyl)sulfone (bisphenol S), 1,4-bis(2-(4-hydroxyphenyl)-2-propyl)benzene (bisphenol P), 5,5'-(1-methylethylidene)-bis[1,1'-(biphenyl)-2-ol]propane (bisphenol PH), 1,1-bis(4-hydroxyphenyl)3,3,5-trimethylcyclohexane (bisphenol TMC), and 1,1-bis(4-hydroxyphenyl)cyclohexane (bisphenol Z). The bisphenol may be used alone or in combination of two or more.

[0029] As the bisphenol, 2,2-bis(4-hydroxyphenyl)propane, that is, bisphenol A is preferably used, but a part of bisphenol A may be replaced with another bisphenol. In the structural unit derived from the dihydroxy compound, the structural unit derived from bisphenol A is preferably 50 mol% or more, more preferably 70 mol% or more, still more preferably 90 mol% or more, and most preferably 100 mol%. Therefore, as the polycarbonate resin (B), bisphenol A homopolycarbonate is most preferred.

[0030] As the production method of the bisphenol-based polycarbonate used as the polycarbonate resin (B), any known method such as the phosgene method, the transesterification method, and the pyridine method may be used. For example, the transesterification method is a production method in which bisphenol and a diester carbonate are added with a basic catalyst and further an acidic substance for neutralizing the basic catalyst, and melt transesterification polycondensation is carried out. Specific examples of the diester carbonate include diphenyl carbonate, ditolyl carbonate, bis(chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, bis(biphenyl) carbonate, diethyl carbonate, dimethyl carbonate, dibutyl carbonate, dicyclohexyl carbonate, etc., and diphenyl carbonate is particularly preferably used.

[0031] The melt flow rate (300 °C, 1.2 kgf) of the polycarbonate resin (B) is preferably 1 g / min or more, more preferably 2 g / min or more, still more preferably 3 g / min or more, and preferably 60 g / min or less, more preferably 50 g / min or less, still more preferably 40 g / min or less, from the viewpoints of mechanical properties and moldability. The melt flow rate of the polycarbonate resin (B) can be measured in accordance with ASTM D1238.

[0032] The mass average molecular weight of the polycarbonate resin (B) is usually 10,000 or more, preferably 30,000 or more, and is also usually in the range of 100,000 or less, preferably 80,000 or less, from the balance between mechanical properties and moldability. The measurement of the mass average molecular weight can be carried out using gel permeation chromatography (GPC) with polystyrene as a standard substance. Also, the viscosity-average molecular weight of the polycarbonate resin (B) is usually 12,000 or more, preferably 15,000 or more, more preferably 20,000 or more, still more preferably 22,000 or more, from the balance between mechanical properties and moldability. Also, it is usually 40,000 or less, preferably 35,000 or less, more preferably 30,000 or less, still more preferably 28,000 or less. The measurement of the viscosity-average molecular weight is carried out by using dichloromethane as a solvent, determining the intrinsic viscosity ([η]) (unit: dl / g) at a temperature of 20 °C using an Ubbelohde viscometer, and calculating from the Schnell viscosity formula: η = 1.23×10 -4 M 0.83 of the formula.

[0033] The glass transition temperature of the polycarbonate resin (B) is preferably higher than the glass transition temperature of the polyester resin (A-1), for example, 110 °C or higher and 200 °C or lower. Also, it is preferably 125 °C or higher, more preferably 135 °C or higher, still more preferably 140 °C or higher, and preferably 175 °C or lower, more preferably 170 °C or lower, still more preferably 165 °C or lower. By setting the glass transition temperature to the above lower limit value or higher, it becomes easier to impart appropriate heat resistance and to reduce dimensional changes during the production of cards or passports. Also, by setting it to the above upper limit value or lower, moldability and the like also become good. The polycarbonate resin (B) usually has a single glass transition temperature.

[0034] The content ratio ((A-1) / (B)) of the polyester resin (A-1) and the polycarbonate resin (B) is preferably 3 / 97 or more and 97 / 3 or less by mass ratio. When the content ratio ((A-1) / (B)) is 3 / 97 or more, it becomes easier to improve low-temperature fusibility and solvent resistance. Also, when the content ratio ((A-1) / (B)) is 97 / 3 or less, it becomes easier to improve heat resistance. From these viewpoints, the content ratio ((A-1) / (B)) is more preferably 6 / 94 or more, further preferably 10 / 90 or more, still further preferably 15 / 85 or more, still further preferably 30 / 70 or more, and still further preferably 40 / 60 or more. Also, the content ratio ((A-1) / (B)) is more preferably 94 / 6 or less, further preferably 90 / 10 or less, still further preferably 85 / 15 or less, still further preferably 80 / 20 or less, and still further preferably 75 / 25 or less.

[0035] [Polyester resin (A-2)] The resin composition of the present invention may contain, as a resin component, a polyester resin (A-2) other than the above-described polyester resin (A-1). The polyester resin (A-2) is a polyester obtained by polycondensing a dicarboxylic acid and a dihydroxy compound. Note that, as the dicarboxylic acid, dicarboxylic acid derivatives such as esters of dicarboxylic acids and acid halides may be used in the synthesis of the polyester resin (A-2). By containing the polyester resin (A-2) in addition to the polyester resin (A-1), the resin composition is likely to have various properties, and for example, tends to easily improve low-temperature fusibility, printing suitability, and the like. Also, even when a relatively large amount of the polycarbonate resin (B) is contained, the low-temperature fusibility is likely to be maintained relatively well. In the following description, the polyester resin (A-1) and the polyester resin (A-2) may be collectively referred to as the polyester resin (A).

[0036] From the viewpoint of heat resistance, the polyester resin (A-2) preferably uses an aromatic dicarboxylic acid as the dicarboxylic acid. Therefore, the polyester resin (A-2) preferably contains a structural unit derived from an aromatic dicarboxylic acid. Specific examples of the aromatic dicarboxylic acid are the same as those described for the polyester resin (A-1), and suitable compounds are also the same. The aromatic dicarboxylic acid may be used alone or in combination of two or more. In the polyester resin (A-2), the structural unit derived from the aromatic dicarboxylic acid is preferably contained in an amount of 80 mol% or more, more preferably 90 mol% or more, and preferably 100 mol% or less, most preferably 100 mol%, in the structure derived from the dicarboxylic acid in the polyester resin (A-1). Further, the polyester resin (A-2) may contain a small amount (usually in the range of 20 mol% or less) of the structural unit derived from the aliphatic dicarboxylic acid. Specific examples of the aliphatic dicarboxylic acid are as described for the polyester resin (A-2).

[0037] The polyester resin (A-2) is preferably a copolymer polyester resin using two or more dihydroxy compounds as copolymerization components. Further, as the dihydroxy compound, at least one of a chain dihydroxy compound and an alicyclic dihydroxy compound may be used in the polyester resin (A-2), but it is preferable to use both of them. Therefore, the polyester resin (A-2) preferably contains a structural unit derived from the chain dihydroxy compound and a structural unit derived from the alicyclic dihydroxy compound. Specific examples of the chain dihydroxy compound used in the polyester resin (A-2) are as described for the polyester resin (A-1), but are preferably one or more selected from ethylene glycol, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol. Further, specific examples of the alicyclic dihydroxy compound used in the polyester resin (A-2) are as described for the polyester resin (A-1), but are preferably one or more selected from tetramethylcyclobutanediol and cyclohexanedimethanol, and more preferably cyclohexanedimethanol. As described above, 1,4-cyclohexanedimethanol is preferable for cyclohexanedimethanol.

[0038] The polyester resin (A-2) preferably has a proportion of structural units derived from alicyclic dihydroxy compounds of 65 mol% or less, preferably 50 mol% or less, more preferably 40 mol% or less, out of a total of 100 mol% of structural units derived from chain dihydroxy compounds and structural units derived from alicyclic dihydroxy compounds. When the proportion of structural units derived from alicyclic dihydroxy compounds is lowered as described above, the content of structural units derived from chain dihydroxy compounds in the polyester resin (A-2) increases, and it becomes easier to improve the low-temperature fusing property of the resin composition and the like. Also, from the viewpoint of improving heat resistance by containing a certain amount or more of the alicyclic dihydroxy compound, the above-mentioned proportion of structural units derived from the alicyclic dihydroxy compound is preferably 5 mol% or more, more preferably 15 mol% or more, and even more preferably 20 mol% or more.

[0039] The glass transition temperature (Tg) of the polyester resin (A-2) is preferably less than 90°C, preferably 88°C or less, more preferably 85°C or less, and even more preferably 82°C or less. Also, from the viewpoint of improving the heat resistance and impact resistance of the resin composition, the glass transition temperature (Tg) of the polyester resin (A-2) is preferably 70°C or more, more preferably 73°C or more, and even more preferably 75°C or more. The method for measuring the glass transition temperature (Tg) is as described above. Also, the polyester resin (A-2) is preferably an amorphous polyester. By using an amorphous polyester, the adhesiveness to other members such as a resin film tends to be good.

[0040] (Content of polyester resins (A-1) and (A-2)) The content of the polyester resin (A-1) in the resin composition is preferably 20 parts by mass or more with respect to 100 parts by mass of the total amount of the polyester resin (A-1) and the polyester resin (A-2). By setting the content of the polyester resin (A-1) to a certain amount or more, while improving the low-temperature fusing property, the heat resistance can be maintained well, and dimensional changes are less likely to occur during heat processing. Therefore, the workability during the production of cards or passports is good, and warping of the resulting cards or passports can be prevented. Furthermore, the solvent resistance is also likely to be good. Also, the impact resistance is likely to be good, and the reliability during long-term use is likely to be improved. The content of the polyester resin (A-1) in the resin composition is more preferably 25 parts by mass or more, even more preferably 35 parts by mass or more, still more preferably 50 parts by mass or more, still more preferably 60 parts by mass or more, and still more preferably 70 parts by mass or more with respect to 100 parts by mass of the total amount of the polyester resin (A-1) and the polyester resin (A-2). Also, the resin composition of the present invention may not contain the polyester resin (A-2) as described above. Therefore, the content of the polyester resin (A-1) in the resin composition may be 100 parts by mass or less with respect to 100 parts by mass of the total amount of the polyester resin (A-1) and the polyester resin (A-2). However, when the polyester resin (A-2) is contained in the resin composition, from the viewpoint that the effect of containing the polyester resin (A-2) is likely to be exhibited, the content of the polyester resin (A-2) is preferably a certain amount or more. Therefore, with respect to 100 parts by mass of the total amount of the polyester resin (A-1) and the polyester resin (A-2), the content of the polyester resin (A-1) is preferably 95 parts by mass or less, more preferably 90 parts by mass or less, and even more preferably 85 parts by mass or less.

[0041] (Content ratio of resins (A) and (B)) The content ratio (A / B) of the content of the polycarbonate resin (B) to the total content of the polyester resins (A-1) and (A-2) (i.e., the content of the polyester resin (A)) is preferably 10 / 90 or more and 97 / 3 or less by mass ratio. When the content ratio ((A) / (B)) is 10 / 90 or more, a certain amount or more of the polyester resin (A) can be contained in the resin composition, and it becomes easier to improve the low-temperature fusion property and solvent resistance. Further, when the content ratio ((A) / (B)) is 97 / 3 or less, a certain amount or more of the polycarbonate resin (B) can be contained in the resin composition, and the heat resistance tends to be improved. From these viewpoints, the content ratio ((A) / (B)) is more preferably 20 / 80 or more, even more preferably 30 / 70 or more, and even more preferably 35 / 65 or more. Also, the content ratio ((A) / (B)) is more preferably 90 / 10 or less, even more preferably 85 / 15 or less, and even more preferably 80 / 20 or less.

[0042] [Colorant] The resin composition of the present invention may further contain a colorant. By containing a colorant, the resin composition of the present invention can be printed by laser irradiation, and the printability thereof also becomes good. Note that laser printing is performed by the resin composition containing the colorant absorbing laser light and generating heat, and the surrounding forming material being carbonized to form a desired print.

[0043] As the colorant, either a pigment or a dye may be used. Examples of white pigments include titanium oxide, barium oxide, zinc oxide, iron oxide as a yellow pigment, titanium yellow, iron oxide as a red pigment, and cobalt blue ultramarine as a blue pigment. As the dye, a white dye is preferred. The white dye may be used by mixing a fluorescent brightening dye or the like. Examples of the fluorescent brightening dye include, for example, fluorescein-based compounds, thioflavin-based compounds, eosin-based compounds, rhodamine-based compounds, coumarin-based compounds, imidazole-based compounds, oxazole-based compounds, triazole-based compounds, carbazole-based compounds, pyridine-based compounds, imidazolone-based compounds, naphthalic acid derivatives, stilbenedisulfonic acid derivatives, stilbenetetrasulfonic acid derivatives, stilbenehexasulfonic acid derivatives, dazolone derivatives, and the like. From the viewpoint of the effects of the present invention, stilbenedisulfonic acid derivatives and the like are preferably mentioned. The colorant may be used alone or in combination of two or more. Among the above-described colorants, white dyes and white pigments with prominent contrast are preferable. The white dye and the white pigment may be used alone, or the white dye and the white pigment may be used in combination. Further, the colorant is more preferably a white pigment, and titanium oxide is even more preferable. The average particle diameter of the pigment is not particularly limited. For example, it is 0.01 μm or more and 10 μm or less, preferably 0.03 μm or more and 5 μm or less, more preferably 0.07 μm or more and 3 μm or less, and even more preferably 0.1 μm or more and 1.0 μm or less. The average particle diameter refers to the volume moment average diameter obtained by laser diffraction particle size distribution measurement.

[0044] Examples of titanium oxide include rutile-type titanium oxide, anatase-type titanium oxide, and the like, and rutile-type titanium oxide is more preferable. By using rutile-type titanium oxide as the white pigment, the effect of suppressing the deterioration of the polyester resin (A) is high.

[0045] Titanium oxide may be surface-treated by various known methods using at least one metal hydroxide or oxide selected from silicon, titanium, zirconium, tin, cerium, etc., if desired. For example, as a surface treatment method with the above metal hydroxide or oxide, a water-soluble compound of the above metal is added to an aqueous slurry of titanium oxide and then neutralized, and the metal hydroxide is precipitated on the surface of titanium oxide particles, and then filtration and drying are adopted. When using titanium oxide, in the resin composition, in addition to titanium oxide, other colorants such as organic pigments and dyes can be blended, and a fluorescent brightening dye as a white dye can also be blended to adjust the color tone.

[0046] The content of the colorant in the resin composition is preferably 0.01 part by mass or more and 40 parts by mass or less with respect to 100 parts by mass of the resin component. When the content of the colorant is 0.01 part by mass, the resin composition can be appropriately colored, and it is easy to improve the laser printability. Furthermore, the design property of a film or the like formed from the resin composition can be enhanced, or concealability can be imparted. Also, by setting it to 40 parts by mass or less, the effect corresponding to the content can be exhibited, and it is also possible to suppress the deterioration of the physical properties of the film formed from the resin composition. From the above viewpoints, the content of the colorant in the resin composition is more preferably 1 part by mass or more, further preferably 3 parts by mass or more, and even more preferably 5 parts by mass or more with respect to 100 parts by mass of the resin component. Also, it is more preferably 30 parts by mass or less, further preferably 25 parts by mass or less, and even more preferably 20 parts by mass or less.

[0047] [Lubricant] The resin composition may contain a lubricant. By containing a lubricant, the surface resistivity of a film or the like made of the resin composition is lowered, and charging is suppressed. In addition, by improving the slipperiness of the surface of a film or the like, it is difficult for the film to adhere to another film or a press plate and peel off. Further, when the surface resistivity is lowered, static electricity is less likely to be generated when the film is unwound from the roll, and it is possible to prevent sparks from occurring during unwinding and damaging the surface of the film or the like. Furthermore, by improving the slipperiness and lowering the surface resistivity, it is possible to prevent the film from meandering or skewing, resulting in misalignment, twisting, wrinkles, or the like when the film or the like is fed out by unwinding from the roll. Therefore, the handleability and processability are improved. Moreover, when the surface resistivity is lowered, floating dust is less likely to be attracted by static electricity and adhere to the surface of the film or the like, and problems such as foreign matter being mixed into the resulting laminated film or card are less likely to occur, and the dustproof property is enhanced. In addition, since the slipperiness is good, the film surface is less likely to be scratched even when rubbed, and the abrasion resistance is also excellent. Furthermore, when the wettability is improved by the lubricant, it is presumed that the printing suitability is improved when printing is performed on a film made of the resin composition. Note that the printing suitability means the ease of ink to blend with the surface of the film made of the resin composition when printing on the surface of the film. When the printing suitability is improved, the ink can be printed neatly on the film without ink repellency or the like occurring.

[0048] Examples of the lubricant generally include compounds having a polar part such as an acid, an ester, a hydroxyl group, an amide group, a metal salt, etc. in the molecule and a non-polar part such as an aliphatic group. In addition to these compounds, any compound that improves the slipperiness with other materials such as metals and resins can be used as a lubricant. Note that using a lubricant having a polar part makes it easier to lower the surface resistivity. Also, using a lubricant having a non-polar part makes it easier to suppress the adhesion of a press plate or the like. Specific lubricants include polyalkylene glycols, fatty acid esters, metal salts having an aliphatic group, fluorine-based polymers, fatty acid amides, aliphatic alcohols, fatty acids, aliphatic hydrocarbon compounds, etc. By adding these lubricants to the polyester resin (A), it becomes easier to exhibit the various performances described above. Among these, it is preferable that the lubricant is at least one selected from polyalkylene glycols, fatty acid esters, metal salts having an aliphatic group, and fluorine-based polymers.

[0049] (Polyalkylene glycol) Examples of polyalkylene glycols may include polyethylene glycol, polypropylene glycol, polybutylene glycol, polytetramethylene glycol, etc., or copolymers of ethylene oxide and propylene oxide, etc. Further, the polyalkylene glycol may have a branch in its molecular skeleton. Among these, polyethylene glycol is preferable. The polyalkylene glycol is preferably a solid wax that becomes solid at normal temperature (23°C). The solid wax is preferable because it is easy to mix with pellets and is less likely to volatilize due to the heat required when processing into a sheet. The polyalkylene glycol that becomes a solid wax has a number average molecular weight of, for example, 500 to 5000. The number average molecular weight refers to the number average molecular weight calculated based on the hydroxyl value measured in accordance with JIS K1577:2007. The polyalkylene glycol may be used alone or in combination of two or more.

[0050] (Fatty acid ester) As the fatty acid ester, known fatty acid esters used as lubricants can be used. The fatty acid ester is an ester made from fatty acids and various alcohols, and those having a long-chain aliphatic group and an ester group in the molecule are preferable. Specific examples of the fatty acid ester lubricant include, for example, higher fatty acid esters of monohydric alcohols, higher fatty acid esters or partial esters of polyhydric alcohols, or partial saponified products thereof. The higher fatty acids used in the higher fatty acid esters have, for example, 10 or more carbon atoms, preferably 12 or more carbon atoms, more preferably 16 or more carbon atoms, still more preferably 20 or more carbon atoms, and preferably 36 or less carbon atoms, more preferably 32 or less carbon atoms. Specifically, montanic acid ester, partially saponified montanic acid ester, methyl laurate, methyl myristate, methyl palmitate, methyl stearate, methyl oleate, methyl erucate, methyl behenate, butyl laurate, butyl stearate, isopropyl myristate, isopropyl palmitate, octyl palmitate, octyl coconut fatty acid ester, octyl stearate, octyl beef fatty acid ester, lauryl laurate, stearyl stearate, behenyl behenate, cetyl myristate, neopentyl glycol dioleate, neopentyl glycol dicapric acid ester and other neopentyl polyol fatty acid esters, trimethylolpropane trioleate and other trimethylolpropane tri-fatty acid esters, trimethylolpropane dicapric acid ester and other trimethylolpropane di-fatty acid esters and other various trimethylolpropane fatty acid esters, pentaerythritol tetraoleate and other pentaerythritol fatty acid esters, dipentaerythritol hexaisononanoate and other dipentaerythritol fatty acid esters, stearic acid monoglyceride, stearic acid diglyceride, stearic acid triglyceride, oleic acid monoglyceride, oleic acid diglyceride, oleic acid triglyceride and other fatty acid glycerides, pentaerythritol fatty acid condensed ester, trimethylolpropane fatty acid condensed ester and the like. Among these, montanic acid ester is preferred. The fatty acid ester may be used alone or in combination of two or more.

[0051] (Metal salt having an aliphatic group) The metal salt used as a lubricant may be any metal salt having an aliphatic group. By using a metal salt having an aliphatic group, it becomes easier to reduce the surface resistivity and to exhibit various effects. Examples of the aliphatic group include an aliphatic hydrocarbon group and an aliphatic acyl group. The aliphatic group is not particularly limited, but preferably has 8 or more carbon atoms, more preferably 10 or more carbon atoms, and preferably 30 or less carbon atoms, more preferably 24 or less carbon atoms, and even more preferably 16 or less carbon atoms. Specific examples of the metal salt include fatty acid metal salts and alkylbenzene sulfonic acid metal salts, and preferably alkylbenzene sulfonic acid metal salts.

[0052] The fatty acid metal salt is a salt of a fatty acid such as stearic acid, lauric acid, myristic acid, castor oil fatty acid, etc., having about 8 to 30 carbon atoms, preferably a higher fatty acid having 10 to 24 carbon atoms, and a metal such as aluminum, calcium, zinc, magnesium, lead, and barium. Preferably, calcium stearate, zinc stearate, magnesium stearate, etc. are mentioned. Examples of the alkylbenzene sulfonic acid metal salt include alkylbenzene sulfonic acid metal salts in which the alkyl group preferably has 8 to 24 carbon atoms, more preferably 10 to 16 carbon atoms. Also, as the metal used, sodium, calcium, magnesium, potassium, etc. are preferable, and sodium is particularly preferable. A preferred specific example of the alkylbenzene sulfonic acid metal salt is sodium dodecylbenzenesulfonate. The metal salt may be used alone or in combination of two or more.

[0053] (Fluorine-based polymer) Examples of fluorine-based polymers include fluororesins having a carbon-fluorine bond in the molecule. Specifically, polytetrafluoroethylene, polytrifluoroethylene, polyvinylidene fluoride, vinylidene fluoride-hexafluoropropylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer, ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer, fluorine-based polymers having a fluoroalkyl group at both ends or one end of the polymer chain, perfluorocarboxylic acid esters, and the like can be mentioned. Among them, vinylidene fluoride-hexafluoropropylene copolymer, vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer, etc. are preferable. The fluorine-based polymer may be used alone or in combination of two or more.

[0054] (Aliphatic amide) Examples of fatty acid amides include known fatty acid amides that can be used as lubricants. Fatty acid amides are amides composed of fatty acids and amines, having a long-chain aliphatic group and an amide group in the molecule, and are also called fatty acid amides. Specifically, there are monoamides, substituted amides, bisamides, methylolamides, ethanolamides, ester amides, substituted ureas, polycondensates of fatty acids and amines, etc. The fatty acids used may be saturated or unsaturated. Also, the number of carbon atoms in the fatty acid is, for example, about 8 to 30, preferably 10 to 24. Examples of preferable fatty acid amides include, for example, stearic acid amide, oleic acid amide, erucic acid amide, behenic acid amide, stearyl erucic acid amide, ethylene biserucic acid amide, ethylene bisstearic acid amide, ethylene bisoleic acid amide, N-oleyl palmitamide, ethylene diamine-stearic acid-sebacic acid polycondensate, and the like. The fatty acid amide may be used alone or in combination of two or more.

[0055] (Aliphatic alcohol) Examples of the aliphatic alcohol include known aliphatic alcohols that can be used as a lubricant. The aliphatic alcohol is, for example, an aliphatic alcohol having 6 to 30 carbon atoms, preferably 10 to 24 carbon atoms. Specific examples of the aliphatic alcohol include, for example, caproyl alcohol, caprylyl alcohol, capryl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, arachidyl alcohol, behenyl alcohol, etc., and preferably stearyl alcohol. The fatty acid alcohol may be used alone or in combination of two or more.

[0056] (Fatty acid) Examples of the fatty acid include known fatty acids that can be used as a lubricant. Examples of the fatty acid include fatty acids having 6 to 30 carbon atoms, preferably 10 to 24 carbon atoms. Specific examples of the fatty acid include saturated fatty acids such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, and unsaturated fatty acids such as oleic acid, erucic acid, etc., and preferably stearic acid.

[0057] (Aliphatic hydrocarbon compound) Examples of the aliphatic hydrocarbon compound include known aliphatic hydrocarbon compounds that can be used as a lubricant. Specific examples of the aliphatic hydrocarbon compound include, for example, paraffin waxes such as liquid paraffin having 16 or more carbon atoms, microcrystalline wax, natural paraffin, synthetic paraffin, polyolefin waxes such as polyethylene wax, and partial oxides, fluorides, chlorides, etc. thereof. The aliphatic hydrocarbon compound may be used alone or in combination of two or more.

[0058] In the resin composition, the lubricant may be used alone or in combination of two or more. When two or more are used in combination, for example, it is preferable to use a polyalkylene glycol and a metal salt having an aliphatic group in combination. Among them, it is more preferable to use polyethylene glycol and a metal alkylbenzene sulfonate in combination. By using these two lubricants in combination, the film made of the resin composition of the present invention becomes less likely to adhere not only to other resin films but also to a press plate, so that the handleability and processability are more excellent. When a polyalkylene glycol and a metal salt having an aliphatic group are used in combination, the ratio of the polyalkylene glycol to the metal salt having an aliphatic group (polyalkylene glycol / metal salt) is preferably 1 / 9 or more and 9 / 1 or less, more preferably 1 / 5 or more and 5 / 1 or less, and still more preferably 1 / 3 or more and 3 / 1 or less in terms of mass ratio.

[0059] Also, it is preferable to use a fatty acid ester and a fluoropolymer in combination. By using these two lubricants in combination, the film made of the resin composition of the present invention becomes less likely to adhere not only to resin films but also to a press plate, so that the handleability and processability are more excellent. When a fatty acid ester and a fluoropolymer are used in combination, the ratio of the fluoropolymer to the fatty acid ester (fluoropolymer / fatty acid ester) is preferably 1 / 9 or more and 9 / 1 or less, more preferably 1 / 6 or more and 6 / 1 or less, still more preferably 1 / 4 or more and 4 / 1 or less, and even more preferably 1 / 3 or more and 3 / 1 or less in terms of mass ratio.

[0060] Also, three or more lubricants may be used in combination. For example, four kinds of a polyalkylene glycol, a metal salt having an aliphatic group, a fatty acid ester, and a fluoropolymer may be used in combination. When four kinds of lubricants are used in combination in this way, the content ratio of the polyalkylene glycol and the metal salt, and the content ratio of the fatty acid ester and the fluoropolymer may be as described above.

[0061] The content of the lubricant in the resin composition is preferably 0.01 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the resin component contained in the resin composition. By being 0.01 part by mass or more, the surface resistivity of a film or the like formed from the resin composition becomes low, charging is prevented, and the slipperiness becomes good, and it becomes easy to improve workability, handleability, dustproofness, scratch resistance, etc. Also, it is presumed that the wettability moderately increases and the printing quality also becomes easy to improve. Also, by setting it to 5 parts by mass or less, the effect corresponding to the content can be exhibited, and it is also possible to suppress the deterioration of the physical properties of the film formed from the resin composition and the deterioration of the printing quality. From the above viewpoints, the content of the lubricant in the resin composition is more preferably 0.1 part by mass or more, further preferably 0.4 part by mass or more, still more preferably 0.6 part by mass or more, and particularly preferably 0.9 part by mass or more with respect to 100 parts by mass of the resin component. Also, it is more preferably 3 parts by mass or less, further preferably 2 parts by mass or less, and particularly preferably 1.5 parts by mass or less.

[0062] [Impact modifier] The resin composition of the present invention may contain an impact modifier. A resin composition using the polyester resin (A) may have insufficient long-term reliability in actual use, but by blending an impact modifier, the influence caused by external impacts such as bending and impact in actual use is alleviated, and the reliability in long-term use becomes good. Examples of the impact modifier include soft styrene-based resins and elastomers. The elastomer may be a core-shell type elastomer. The impact modifier may be used alone or in combination of two or more. Among the above, a core-shell type elastomer is preferable as the impact modifier. By using a core-shell type elastomer, the impact resistance is further improved, and the reliability in long-term use becomes even better.

[0063] Examples of the soft styrene-based resin include block copolymers containing a styrene polymer block and a conjugated diene polymer block, and block copolymers containing a styrene polymer block and an acrylonitrile block. The styrene content in the soft styrene-based resin is, for example, 5% by mass or more and 80% by mass or less, preferably 10% by mass or more and 50% by mass or less, and more preferably 15% by mass or more and 30% by mass or less. When the styrene content is within the above range, the effect of imparting impact resistance is further improved.

[0064] As the conjugated diene polymer block used for the soft styrene-based resin, homopolymers such as butadiene, isoprene, and 1,3-pentadiene, copolymers thereof, or copolymers containing a monomer copolymerizable with a conjugated diene-based monomer in the block can be used. Specific examples of the soft styrene-based resin include styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), silicone-acrylic composite rubber-acrylonitrile-styrene copolymer (SAS), methyl methacrylate-maleic anhydride-styrene copolymer (SMM), acrylonitrile-styrene copolymer (AS), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylic rubber copolymer (ASA), acrylonitrile-ethylene propylene rubber-styrene copolymer (AES), and the like. Specific products include the "Clayton D" series manufactured by Clayton Polymer Co., Ltd., the "AR-100" series manufactured by Aron Kasei Co., Ltd., the "Diarex" series manufactured by UMG ABS Co., Ltd., the "Delpet" series manufactured by Asahi Kasei Chemicals Corporation, and the like. In addition, as the styrene-based elastomer described later, the "Dynaron" series manufactured by JSR Corporation, the "Tuftec" series manufactured by Asahi Kasei Chemicals Corporation, the "Hybrar" series manufactured by Kuraray Co., Ltd., and the like can also be used.

[0065] Note that the block copolymer includes pure blocks, random blocks, tapered blocks, etc., and the form of copolymerization is not particularly limited. Also, the block units may have multiple repeating units overlapping. Specifically, in the case of a styrene-butadiene block copolymer, the block units may be repeated multiple times, such as in a styrene-butadiene copolymer, a styrene-butadiene-styrene block copolymer, or a styrene-butadiene-styrene-butadiene block copolymer.

[0066] In addition, a hydrogenated styrene-butadiene-styrene block copolymer (SEBS) or a hydrogenated styrene-isoprene-styrene block copolymer (SEPS) in which part or all of the double bonds of the conjugated diene polymer block of SBS or SIS are hydrogenated can also be used. Specific products include the "Tuftec H" series manufactured by Asahi Kasei Chemicals Corporation and the "Clayton G" series manufactured by Clayton Polymer Corporation.

[0067] It is also possible to impart a functional group having polarity to the soft styrene resin. Specific examples of the functional group having polarity include an acid anhydride group, a carboxylic acid group, a carboxylic acid ester group, a carboxylic acid chloride group, a carboxylic acid amide group, a carboxylate group, a sulfonic acid group, a sulfonic acid ester group, a sulfonic acid chloride group, a sulfonic acid amide group, a sulfonate group, an epoxy group, an amino group, an imide group, an oxazoline group, etc. Among these, it is preferable to impart an acid anhydride group or an epoxy group. As the soft styrene resin imparted with a functional group having polarity, modified products of SEBS and SEPS are preferably used. Specifically, maleic anhydride-modified SEBS, maleic anhydride-modified SEPS, epoxy-modified SEBS, epoxy-modified SEPS, etc. can be mentioned. Specific products include the "Tuftec M" series manufactured by Asahi Kasei Chemicals Corporation, the "Dynaron" series manufactured by JSR Corporation, and the "Epofrend" series manufactured by Daicel Chemical Industries, Ltd.

[0068] Further, the soft styrene-based resin may be a styrene-based elastomer containing an elastomer component. Specifically, among those described above, block copolymers of a styrene component and butadiene, isoprene, 1,3-pentadiene, etc. may be mentioned, and these modified products, hydrogenated products, etc. may also be used. More specifically, SBS, SIS, SEBS, SEPS, etc. may be mentioned.

[0069] The elastomer may be other than a styrene-based elastomer, and known ones such as polyester-based elastomers, polyolefin-based elastomers, diene-based elastomers, acrylic-based elastomers, polyamide-based elastomers, polyurethane-based elastomers, fluorine-based elastomers, and silicone-based elastomers may be mentioned. The elastomer is generally a thermoplastic elastomer. The elastomer is preferably a polyester-based elastomer or the above-mentioned styrene-based elastomer.

[0070] The polyester-based elastomer is a thermoplastic polyester having rubber properties at normal temperature, preferably a thermoplastic elastomer mainly composed of a polyester-based block copolymer, and is preferably a block copolymer having a high melting point and high crystallinity aromatic polyester as a hard segment and an amorphous polyester or amorphous polyether as a soft segment. The content of the soft segment of the polyester-based elastomer is at least 20 to 95 mol% in all segments, and in the case of a block copolymer of polybutylene terephthalate and polytetramethylene glycol (PTMG-PBT copolymer), it is 50 to 95 mol%. The preferred content of the soft segment is 50 to 90 mol%, particularly 60 to 85 mol%. Among them, polyester ether block copolymers, particularly PTMG-PBT copolymers, are preferred because the decrease in transmittance is small.

[0071] The core-shell type elastomer is composed of an innermost layer (i.e., the core) and one or more outer layers (i.e., the shell) covering it. As the core-shell type elastomer, a core-shell type graft copolymer in which a monomer component capable of graft copolymerization with respect to the core is graft copolymerized as the shell is preferable.

[0072] The core-shell type graft copolymer usually has a polymer component called a rubber component as the core. In the core-shell type graft copolymer, it is preferable that the polymer component constituting the core and the monomer component copolymerizable with this polymer component are graft copolymerized as the shell. As a method for producing the core-shell type graft copolymer, any production method such as bulk polymerization, solution polymerization, suspension polymerization, emulsion polymerization, etc. may be used, and the copolymerization method may be one-stage graft or multi-stage graft. However, usually, a commercially available core-shell type elastomer can be used as it is. Commercially available core-shell type elastomers will be exemplified later.

[0073] Specific examples of the polymer component that forms the core include butadiene-based rubbers such as polybutadiene and styrene-butadiene copolymers, isoprene-based rubbers, polybutyl acrylate, poly(2-ethylhexyl acrylate), acrylic-based rubbers such as butyl acrylate·2-ethylhexyl acrylate copolymer, silicone-based rubbers such as polyorganosiloxane rubber, butadiene·acrylic composite rubber, silicone·acrylic composite rubbers such as IPN (Interpenetrating Polymer Network) type composite rubber composed of polyorganosiloxane rubber and polyalkyl acrylate rubber, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-α olefin-based rubbers such as ethylene-octene copolymer, ethylene-acrylic rubber, fluorine rubber, and the like. These may be used alone or in combination of two or more. Among these, from the viewpoint of mechanical properties and surface appearance, at least one selected from butadiene-based rubbers, acrylic-based rubbers, silicone-based rubbers, and silicone·acrylic composite rubbers is preferable, and among them, at least one selected from butadiene-based rubbers and silicone·acrylic composite rubbers is more preferable.

[0074] Specific examples of the monomer component graft copolymerizable with the polymer component of the core that constitutes the shell include aromatic vinyl compounds; vinyl cyanide compounds; (meth)acrylic compounds such as (meth)acrylic acid ester compounds, (meth)acrylic acid compounds, and epoxy group-containing (meth)acrylic acid ester compounds such as glycidyl (meth)acrylate; maleimide compounds such as maleimide, N-methylmaleimide, and N-phenylmaleimide; α,β-unsaturated carboxylic acid compounds such as maleic acid, phthalic acid, and itaconic acid and their anhydrides (for example, maleic anhydride, etc.). These monomer components may be used alone or in combination of two or more. Among these, from the viewpoint of mechanical properties and surface appearance, aromatic vinyl compounds, vinyl cyanide compounds, and (meth)acrylic compounds are preferable, and more preferably, aromatic vinyl compounds, (meth)acrylic compounds, and among them, (meth)acrylic acid ester compounds. Specific examples of the aromatic vinyl compound include styrene, α-methylstyrene, 1-vinylnaphthalene, 4-methylstyrene, 4-propylstyrene, 4-cyclohexylstyrene, 4-dodecylstyrene, 2-ethyl-4-benzylstyrene, 4-(phenylbutyl)styrene, or halogenated styrene, etc. Among them, styrene or α-methylstyrene is more preferable. Specific examples of the (meth)acrylic acid ester compound include methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, cyclohexyl (meth)acrylate, octyl (meth)acrylate, etc. Among these, methyl (meth)acrylate and ethyl (meth)acrylate, which are relatively easy to obtain, are preferable, and methyl (meth)acrylate is more preferable. Note that "(meth)acrylic" is a general term for "acrylic" and "methacrylic".

[0075] As the core-shell type elastomer, a core-shell type graft copolymer is particularly preferable, which comprises at least one polymer component selected from butadiene-based rubber, acrylic-based rubber, silicone-based rubber, and silicone-acrylic composite rubber as the core, and a shell formed by graft copolymerizing a (meth)acrylic-based compound such as a (meth)acrylic acid ester and an aromatic vinyl compound around the core. The content of the polymer component of the core in the core-shell type graft copolymer is preferably 40% by mass or more, more preferably 60% by mass or more, still more preferably 70% by mass or more, and even more preferably 80% by mass or more. In addition, in the shell of the core-shell type graft copolymer, the total content of the (meth)acrylic-based compound (especially, (meth)acrylic acid ester) component and the aromatic vinyl compound component is preferably 30% by mass or more, more preferably 50% by mass or more, still more preferably 60% by mass or more, and even more preferably 70% by mass or more. In the shell, either the (meth)acrylic-based compound or the aromatic vinyl compound may be used alone, or they may be used in combination.

[0076] Preferable specific examples of the core-shell type elastomer include methyl methacrylate-butadiene-styrene copolymer (MBS), methyl methacrylate-acrylonitrile-butadiene-styrene copolymer (MABS), methyl methacrylate-butadiene copolymer (MB), methyl methacrylate-acrylic rubber copolymer (MA), methyl methacrylate-acrylic rubber-styrene copolymer (MAS), methyl methacrylate-acrylic butadiene rubber copolymer, methyl methacrylate-acrylic butadiene rubber-styrene copolymer, methyl methacrylate-(acrylic silicone composite rubber) copolymer, and the like.

[0077] Examples of commercially available core-shell type graft copolymers include, for example, "Paraloid EXL2602", "Paraloid EXL2603", "Paraloid EXL2690", "Paraloid EXL2691J", "Paraloid EXL2650J", "Paraloid EXL2655", "Paraloid EXL2311", "Paraloid EXL2313", "Paraloid EXL2315", "Paraloid KM330", "Paraloid KM336P", "Paraloid KCZ201" manufactured by Dow Chemical Japan Co., Ltd.; "Metablen C-223A", "Metablen E-901", "Metablen S-2001", "Metablen W-450A", "Metablen SRK-200" manufactured by Mitsubishi Chemical Corporation; "Kaneka Ace M-210", "Kaneka Ace M-511", "Kaneka Ace M-600", "Kaneka Ace M-400", "Kaneka Ace M-580", "Kaneka Ace M-590", "Kaneka Ace M-711", "Kaneka Ace MR-01", "Kaneka Ace M-300" manufactured by Kaneka Corporation, and the like. These impact resistance improvers such as core-shell type graft copolymers may be used alone or in combination of two or more.

[0078] In the resin composition, the content of the impact modifier is preferably 1 part by mass or more and 40 parts by mass or less with respect to 100 parts by mass of the resin component. When the content of the impact modifier is 1 part by mass or more, the influence caused by external impact is moderately alleviated, and the long-term reliability is improved. By setting it to 40 parts by mass or less, the effects corresponding to the content can be exerted, and it is also possible to prevent the deterioration of various physical properties such as the heat resistance of the film formed from the resin composition. From these viewpoints, the content of the impact modifier in the resin composition is more preferably 2.5 parts by mass or more, even more preferably 3 parts by mass or more, and still more preferably 5 parts by mass or more with respect to 100 parts by mass of the resin component. Also, it is more preferably 30 parts by mass or less, even more preferably 20 parts by mass or less, still more preferably 16 parts by mass or less, and particularly preferably 12 parts by mass or less.

[0079] [Laser colorant] The resin composition may contain a laser colorant. The laser colorant is not particularly limited as long as it has a function of generating heat upon irradiation with a laser beam. It may be a so-called self-coloring type colorant that itself colors upon irradiation with laser light, or it may not color itself. The laser colorant can promote the carbonization of the surrounding forming material by generating heat, and can further enhance the laser printability. Furthermore, when a self-coloring laser colorant is used, the coloring of the laser colorant and the coloring by the carbide generated by the carbonization of the forming material are synergistic, and a print with a dark color and excellent visibility can be represented. When the laser colorant colors, its color is not particularly limited, but from the viewpoint of visibility, it is preferable to use a laser colorant that can color to a dark color including black, navy, and brown.

[0080] The laser colorant may be a metal oxide or a compound other than a metal oxide. The metal oxide is not limited as long as it has a laser coloration effect. For example, iron oxide, copper oxide, zinc oxide, tin oxide, cobalt oxide, nickel oxide, bismuth oxide, indium oxide, antimony oxide, tungsten oxide, neodymium oxide, mica, hydrotalcite, montmorillonite, smectite, etc. can be mentioned. Alternatively, a laser colorant other than a metal oxide may be used, such as metals such as iron, copper, zinc, tin, gold, silver, cobalt, nickel, bismuth, antimony, aluminum, etc., metal salts such as iron chloride, iron nitrate, iron phosphate, copper chloride, copper nitrate, copper phosphate, zinc chloride, zinc nitrate, zinc phosphate, nickel chloride, nickel nitrate, basic bismuth carbonate, bismuth nitrate, etc., metal hydroxides such as magnesium hydroxide, lanthanum hydroxide, nickel hydroxide, bismuth hydroxide, etc., metal borides such as zirconium boride, titanium boride, lanthanum boride, etc. In addition, metal borides are preferably hexaborides because they have near-infrared absorption ability, and among them, lanthanum hexaboride is preferable because it has excellent absorption efficiency of laser light. Further, for example, dye systems represented by leuco dyes such as fluoran-based, phenothiazine-based, spiropyran-based, triphenylmethaphthalide-based, rhodamine lactam-based, etc., and carbon black can also be used. As the laser colorant, it is preferable to use bismuth-based metal oxides such as bismuth oxide and metal oxides containing at least one metal selected from Zn, Ti, Al, Zr, Sr, Nd, and Nb in addition to bismuth. The laser colorant may be used alone or in combination of two or more.

[0081] [Antioxidant] The resin composition may contain an antioxidant. The antioxidant has the effect of suppressing the transesterification reaction between the polyester resin and the polycarbonate resin, and it becomes possible to suppress the foaming due to the transesterification reaction in the resin composition. In addition, the antioxidant can also prevent the yellowing of molded products such as films molded from the resin composition. As the antioxidant, for example, phenolic antioxidants, phosphorus-based antioxidants, sulfur-based antioxidants, etc. can be used. Among them, phenolic antioxidants and phosphorus-based antioxidants are preferred. The antioxidant may be used alone or in combination of two or more. By using two or more types of antioxidants, it is possible to effectively suppress the decrease in molecular weight and yellowing during molding. Also, by using two or more types of antioxidants, it is possible to achieve both the stability during molding and the long-term stability after molding.

[0082] Examples of phenolic antioxidants include α-tocopherol, 4-methoxyphenol, 4-hydroxyphenyl (meth)acrylate, β-tocopherol, 2,6-di-tert-butylphenol, 2,6-di-tert-4-methoxyphenol, 2-tert-butyl-4-methoxyphenol, 2,4-dimethyl-6-tert-butylphenol, 2,6-di-tert-butyl-4-methylphenol (dibutylhydroxytoluene, BHT), stearyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, etc. Among them, 2,6-di-tert-butyl-4-methylphenol (dibutylhydroxytoluene, BHT) is preferred.

[0083] Examples of phosphorus-based antioxidants include tris(2,5-di-tert-butylphenyl) phosphite, tris(2,4-di-tert-butylphenyl) phosphite, tris[2,4-bis(1,1-dimethylpropyl)phenyl] phosphite, tris(mono- or di-tert-butylphenyl) phosphite, 4,4'-butylidene-bis(3-methyl-6-t-butylphenyl-di-tridecyl phosphite), cyclic neopentanetetraylbis(2,6-di-t-butyl-4-methylphenyl phosphite), tris(nonylphenyl) phosphite, 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, and trisalkyl phosphites such as tristearyl phosphite. Among them, trisalkyl phosphites such as tristearyl phosphite are preferred.

[0084] Examples of sulfur-based antioxidants include thiodipropionic acid, dilauryl thiodipropionate, distearyl thiodipropionate, lauryl stearyl thiodipropionate, dimyristyl thiodipropionate, distearyl-β,β'-thiodibutyrate, thiobis(β-naphthol), thiobis(N-phenyl-β-naphthylamine, 2-mercaptobenzothiazole, 2-mercaptobenzimidazole, tetramethylthiuram monosulfide, tetramethylthiuram disulfide, nickel dibutyldithiocarbamate, and the like.

[0085] The content of the antioxidant in the resin composition is preferably 0.05 parts by mass or more and 4 parts by mass or less, more preferably 0.07 parts by mass or more and 3 parts by mass or less, still more preferably 0.1 parts by mass or more and 2 parts by mass or less, and even more preferably 0.15 parts by mass or more and 1.5 parts by mass or less, based on 100 parts by mass of the resin component. By setting the content of the antioxidant to be not less than the above lower limit value, foaming, yellowing, etc. caused by the transesterification reaction can be effectively suppressed. Also, when it is not more than the above upper limit value, the effect corresponding to the content can be exerted.

[0086] (Other components) The resin composition may contain known additives used in resin materials other than those described above. Examples of the additives include heat stabilizers, process stabilizers, ultraviolet absorbers, light stabilizers, matting agents, processing aids, metal deactivators, residual polymerization catalyst deactivators, antibacterial and antifungal agents, antiviral agents, antistatic agents, flame retardants, fillers, and the like.

[0087] In addition, as the resin component of the resin composition of the present invention, only the polyester resin (A) and the polycarbonate resin (B) may be used, but within a range not contrary to the gist of the present invention, resins other than the polyester resin (A) and the polycarbonate resin (B) may be contained. As such resins, known resins that are generally used may be used, but it is preferable to use resins that are compatible with the polyester resin (A) and the polycarbonate resin (B). In the present specification, the resin component excludes those used as the impact modifier described above. The resin constituting the resin composition preferably contains the polyester resin (A) and the polycarbonate resin (B) as main components, and the total content of the polyester resin (A) and the polycarbonate resin (B) is preferably 70% by mass or more, more preferably 90% by mass or more, and most preferably 100% by mass with respect to the total amount of the resin components contained in the resin composition.

[0088] (Storage elastic modulus) The resin composition of the present invention preferably has a storage elastic modulus at 100 °C of 1×10 9 Pa or more. When the storage elastic modulus at 100 °C is 1×10 9 Pa or more, deformation is less likely to occur when heated, and the workability during the production of cards and passports is improved. In addition, warping of cards and passports is less likely to occur. Furthermore, it is likely to have durability that can withstand long-term use. The storage elastic modulus of the resin composition at 100 °C is more preferably 1.1×10 9 Pa or more, and even more preferably 1.3×10 9 Pa or more. In addition, the storage elastic modulus is not particularly limited with respect to the upper limit. For example, 1×10 11Pa or less, preferably 5×10 10 Pa or less, more preferably 3×10 10 Pa or less, still more preferably 1×10 10 Pa or less.

[0089] The storage modulus is the value of the tensile storage modulus obtained from dynamic viscoelasticity measurement in accordance with JIS K7244-4:1999, and specifically is as described in the examples. In addition, for the test piece for obtaining the tensile storage modulus, a film may be produced from the resin composition by, for example, press molding, extrusion molding, etc., and the film may be used as the test piece. In the case of extrusion molding, etc., it may be produced so as not to be stretched, but if there is directionality, it may be measured in the MD direction. In the case where there is no directionality such as in press molding, etc., it may be measured in only one direction, and the measured value may be taken as the storage modulus. Note that MD (Machine Direction) is the flow direction of the resin, and TD (transverse direction) is the direction perpendicular to the MD along the plane direction of the film.

[0090] (Recycled raw material) The resin composition of the present invention may contain a recycled raw material. By using a recycled raw material, it is possible to contribute to global environmental protection such as reduction of waste and reduction of energy consumption. The recycled raw material may be a raw material obtained by chemically recycling recovered products, waste, etc. by a chemical recycling method involving a chemical reaction. Further, it may be a raw material obtained by physically recycling recovered products, waste, etc. by a physical recycling method (mechanical recycling). As the recycled raw material, it is preferable to use a recycled raw material for at least a part of the above polyester resin (A-1) and polyester resin (A-2), and it is more preferable to use a recycled raw material for at least a part of the polyester resin (A-1). In addition, it is also preferable to use a recycled raw material for at least a part of the polycarbonate resin (B). Incidentally, the polyester resin (A-1), polyester resin (A-2), and polycarbonate resin (B) each composed of recycled raw materials are also referred to as recycled polyester resin (A-1), recycled polyester resin (A-2), and recycled polycarbonate resin (B), respectively.

[0091] The total content of the recycled polyester resin (A-1), recycled polyester resin (A-2), and recycled polycarbonate resin (B) in the resin composition is, for example, 30% by mass or more, preferably 50% by mass or more, more preferably 70% by mass or more, based on the total amount of the polyester resin (A-1), polyester resin (A-2), and polycarbonate resin (B). From the perspective of global environmental protection, the higher the content of recycled raw materials, the better, and there is no particular limitation as long as it is 100% by mass or less.

[0092] The recycled polyester resin (A-1) or recycled polyester resin (A-2) may be regenerated by the chemical recycling method as described above. Specifically, it can be obtained by depolymerizing the discarded polyester resin and then polymerizing again from the obtained intermediate or monomer to synthesize the polyester resin (A-1) or polyester resin (A-2). Also, the recycled polycarbonate resin (B) may also be regenerated by the chemical recycling method.

[0093] The recycled polyester resin (A-1), recycled polyester resin (A-2), or recycled polycarbonate resin (B) may also be regenerated by the physical recycling method as described above. Specifically, the recycled polyester resin (A-1), recycled polyester resin (A-2), or recycled polycarbonate resin (B) can be obtained by collecting polyester resin products, polycarbonate resin products, offcuts generated during the production process, etc., sorting and washing them as necessary, and then performing processing such as melting and pulverizing, and then appropriately performing processing such as granulation, micronization, pelletization, and flaking, and using them as a raw material for the resin composition in a form such as powder, granular, pellet, or flake form and using them as recycled raw materials. In addition, in the case of the recycled polyester resin (A-1) and the recycled polyester resin (A-2), in the process of obtaining the recycled raw material by the physical recycling method, solid-phase polymerization or the like may be performed to increase the molecular weight. That is, the recycled polyester resin (A-1) or the recycled polyester resin (A-2) may be recycled by a physical recycling method without accompanying a chemical reaction, or the molecular weight may be increased by a chemical change while being recycled by the physical recycling method.

[0094] The recycled polyester resin (A-1) or the recycled polyester resin (A-2) is preferably a recycled polyester resin recycled from the edge materials generated in the production process. Similarly, the polycarbonate resin (B) is preferably a recycled polyester resin recycled from the edge materials generated in the production process. Since the edge materials generated in the production process have a relatively stable raw material composition and are often known in terms of the raw material composition, they are easy to recycle as recycled raw materials. Note that the edge materials generated in the production process are polyester resins or polycarbonate resins that are generated until the synthesized polyester resin or polycarbonate resin is processed into a predetermined product form (any product form such as films, sheets, fibers, strands, blocks, pellets, powders, and other molded products) and are not used as products.

[0095] The resin composition is not particularly limited as long as it is used for at least a part of either a card or a passport. For example, as described later, it can be used for any of the core sheet, laser marking sheet, and protective sheet of a card or a passport, and it is preferably used for either the core sheet or the laser marking sheet. The laser marking sheet is a sheet provided for laser marking on a card or a passport. For example, when a resin composition containing a colorant, a laser coloring agent, or both of them is used for the laser marking sheet, it is easy to improve the laser printability on the laser marking sheet. In addition, since the core sheet generally contains a colorant from the viewpoints of design and concealment, for example, a resin composition containing a colorant is suitable for use as the core sheet. When using a resin composition containing a colorant for the core sheet, it is advisable to perform laser printing on the core sheet. Thus, in a card or passport, a laser marking sheet may not be provided, but it may be provided. Furthermore, as will be described later, the core sheet, laser marking sheet, and protective sheet of each card or passport may be configured by laminating a plurality of resin layers (films). In that case, at least one of the plurality of resin layers (films) may be composed of the above resin composition.

[0096] (Method for manufacturing the resin composition) The resin composition of the present invention may be obtained by mixing raw materials constituting the resin composition such as polyester resin (A-1), polycarbonate resin (B), optionally blended polyester resin (A-2), colorant, lubricant, impact modifier, laser colorant, antioxidant, and other additives. When the resin composition contains recycled raw materials, it is advisable to blend the recycled raw materials into the resin composition and mix the recycled raw materials together with other raw materials to obtain the resin composition. The mixing of the raw materials may be carried out by melt-kneading while heating in an extruder, plastomill, etc., but a dry blend of the raw materials constituting the resin composition using a tumbler or the like may be used as it is. The temperature of the melt-kneading is appropriately adjusted according to the type of resin, mixing ratio, presence or absence and type of additives. From the viewpoint of productivity and the like, it is preferably 220°C or higher, more preferably 240°C or higher, and even more preferably 250°C or higher. Also, it is preferably 300°C or lower, more preferably 280°C or lower, and even more preferably 270°C or lower. Within this range of the melt-kneading temperature, it becomes easy to sufficiently fluidize while suppressing decomposition and crosslinking of the resin.

[0097] <Film for card or passport> The film for cards or passports of the present invention (hereinafter sometimes referred to as "this film") is a film made of the above-described resin composition. The thickness of this film is not particularly limited and may be appropriately adjusted according to the purpose of use. For example, it is 5 μm or more, preferably 10 μm or more, more preferably 15 μm or more, still more preferably 20 μm or more, and 1000 μm or less, preferably 500 μm or less, more preferably 300 μm or less, still more preferably 200 μm or less. This film may form a single-layer structure or may form one layer of a laminate having a multilayer structure. In the laminate having a multilayer structure, only one layer may be composed of this film, or two or more layers may be composed of the film of the present invention. Note that, as will be described later, cards or passports are generally composed of a plurality of resin layers stacked on top of each other, but this film may constitute at least one of them.

[0098] (Heating shrinkage rate) This film preferably has a heating shrinkage rate represented by the following formula when heat-treated at 110 °C for 10 minutes of -1.7% or more. The heating shrinkage rate may be calculated by attaching a standard line to the measurement sample and measuring the interval between the standard lines before and after the heat treatment. Heating shrinkage rate (%) = [Interval between standard lines after heat treatment - Interval between standard lines before heat treatment] / Interval between standard lines before heat treatment × 100

[0099] The heating shrinkage rate becomes a negative value when it shrinks due to heating and a positive value when it expands due to heating. Generally, resin films shrink due to heating, so the heating shrinkage rate of this film usually becomes a negative value, but the smaller the absolute value, the less the shrinkage during heating. Therefore, when the heating shrinkage rate of this film when heat-treated at 110 °C for 10 minutes is -1.7% or more as described above, the dimensional change when producing a card or a passport becomes small, and a decrease in workability and warpage can be prevented. From these viewpoints, when heat-treated at 110°C for 10 minutes, the heat expansion and contraction rate is more preferably -1.4% or more, even more preferably -1.0% or more, still more preferably -0.8% or more, even still more preferably -0.5% or more, and even still more preferably -0.3% or more. On the other hand, the closer the heat expansion and contraction rate is to 0% as described above, the better. Therefore, the upper limit of the heat expansion and contraction rate when heat-treated at 110°C for 10 minutes is generally 0%.

[0100] When this film is heat-treated at 140°C for 10 minutes, it is preferable that the heat expansion and contraction rate represented by the above formula is -3.5% or more. When the heat expansion and contraction rate of this film when heat-treated at 140°C for 10 minutes is -3.5% or more, warping is less likely to occur when producing a card or a passport, and workability is also improved. When heat-treated at 140°C for 10 minutes, the heat shrinkage rate is more preferably -3% or more, even more preferably -2% or more, still more preferably -1.5% or more, and even still more preferably -1.2% or more. Note that the heat expansion and contraction rate described above should be measured in two directions, one in the machine direction (MD) of the film surface and the other in the direction perpendicular to the machine direction, and the lower value (i.e., the value with greater heat shrinkage) should be adopted. However, when the MD and TD directions are known, the heat expansion and contraction rate may be measured in the MD and TD directions.

[0101] (Method for manufacturing a film for a card or a passport) The film for a card or a passport (this film) can be manufactured by a known method. However, the resin composition for forming this film may be obtained as described above, and the resin composition may be formed into a film. The method of forming the resin composition into a film is not particularly limited, and it may be press molding or extrusion molding, etc. Extrusion molding is preferable in terms of productivity and cost. When forming a laminate with a multilayer structure using this film, a plurality of resin films may be laminated by a known lamination method, or a resin composition for forming another resin layer may be melt-extruded and laminated on the resin film. Also, a multilayer structure may be formed by co-extrusion.

[0102] <Card and passport> The card of the present invention includes the above-mentioned film. Further, the passport of the present invention includes the above-mentioned film. Examples of the card include an IC card, a magnetic card, a driver's license, a residence card, a certificate of qualification, an employee ID card, a student ID card, a My Number card, a seal registration certificate, a vehicle inspection certificate, a tag card, a prepaid card, a cash card, a credit card, an ETC card, a SIM card, a B-CAS card, etc. The card or passport may include a core sheet. Further, in addition to the core sheet, the card or passport may include one or both of a laser marking sheet and a protective sheet.

[0103] (Card) Hereinafter, the preferable layer structure of the card will be described in more detail. Preferably, the laser marking sheets are laminated on both surfaces of the core sheet. Specifically, the card 20A composed of the laser marking sheet 1 / core sheet 2 / laser marking sheet 1 shown in Fig. 1(a), or the card 20B composed of the protective sheet 4 / laser marking sheet 1 / core sheet 2 / laser marking sheet 1 / protective sheet 4 shown in Fig. 1(b) is preferable. Further, the laser marking sheet 1 may be omitted, and the card 20C composed of the protective sheet 4 / core sheet 2 / protective sheet 4 shown in Fig. 1(c) may also be used. Also, in each of the cards 20A to 20C, the layer structures provided on both surfaces of the core sheet 2 are the same as each other, but may be different from each other on each surface. For example, the laser marking sheet 1 and the protective sheet 4 may be provided in this order on one surface of the core sheet 2, and only the protective sheet 4 may be provided on the other surface of the core sheet 2.

[0104] The laser marking sheet 1 may be composed of a single resin layer, but is preferably a laminate having a multilayer structure composed of a plurality of resin layers. The laser marking sheet 1 preferably includes a resin layer containing a laser colorant. When it is composed of a single resin layer, one of the resin layers may contain the laser colorant. Further, in the case of a multilayer structure, one or more of the plurality of resin layers may contain the laser colorant.

[0105] The core sheet 2 is usually composed of a single resin layer, but may be composed of a plurality of resin layers. The thickness of the core sheet is, for example, about 400 to 700 μm. Further, the core sheet is preferably a colored sheet appropriately containing a colorant. Specific examples of the colorant used for the core sheet are as described above.

[0106] A sublimation thermal transfer image receiving layer may be provided on the outermost surface of the laser marking sheet, or on the outermost surface of the core sheet when the laser marking sheet is omitted. In the laser marking sheet and the core sheet, the sublimation thermal transfer image receiving layer is preferably provided on the front surface on the visible side. Therefore, the sublimation thermal transfer image receiving layer provided on the laser marking sheet is preferably provided on the side opposite to the core sheet. The same applies to the passport described later.

[0107] Conventionally known sublimation thermal transfer image receiving layers can be used. For example, it is composed of a varnish mainly composed of a resin that easily transfers or dyes a coloring material, and various additives such as a release agent, a stabilizer, and an ultraviolet absorber are added as necessary. The resin that is easily dyed and used in the sublimation-type thermal transfer image receiving layer can be a polyolefin resin such as polypropylene, a halogenated resin such as polyvinyl chloride or polyvinylidene chloride, a vinyl resin such as polyvinyl acetate or polyacrylate ester, and copolymers thereof, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, a polystyrene resin, a polyamide resin, a copolymer of an olefin such as ethylene or propylene and another vinyl monomer, an ionomer, a cellulose derivative, etc., either alone or as a mixture. Among these, polyester resins and vinyl resins are preferred. The sublimation-type thermal transfer image receiving layer can be formed by dissolving and dispersing the above resin in a solvent such as an organic solvent or water and then coating it.

[0108] The protective sheet is laminated to protect the card. The protective sheet may consist of a single resin layer or may be a laminate with a multilayer structure composed of a plurality of resin layers. The protective sheet is also called an oversheet and generally constitutes the outermost layer of the card. When the protective sheet is laminated outside the laser marking sheet 1, it suppresses the so-called "swelling" in which the laser-printed part foams due to laser light irradiation.

[0109] The card is preferably manufactured by appropriately overlapping, pressing, and heat-sealing the core sheet, the laser marking sheet, and the protective sheet so as to have the above-described layer structure, and then performing punching or other processing. Alternatively, adhesives or the like may be appropriately used instead of heat-sealing to bond the sheets together.

[0110] (Passport) Next, the preferred layer structure of the passport will be described in more detail. This film is preferably used for a so-called electronic passport equipped with an IC chip. In particular, when plasticizing the data page, it is preferable to include a hinge sheet and core sheets provided on both sides of the hinge sheet, and a laser marking sheet is further laminated on the surface of the core sheet. Further, the passport preferably includes a protective sheet, and in order to protect the laser marking sheet, a protective sheet is further laminated on the surface of the laser marking sheet. Specifically, the passport 10A composed of the laser marking sheet 1 / core sheet 2 / hinge sheet 3 / core sheet 2 / laser marking sheet 1 shown in Fig. 2(a), or the passport 10B composed of the protective sheet 4 / laser marking sheet 1 / core sheet 2 / hinge sheet 3 / core sheet 2 / laser marking sheet 1 / protective sheet 4 shown in Fig. 2(b) is preferred. Also, the laser marking sheet 1 may be omitted, and it may be the card 10C composed of the protective sheet 4 / core sheet 2 / hinge sheet 3 / core sheet 2 / protective sheet 4 shown in Fig. 2(c). Also, in each of the passports 10A, 10B, and 10C, the layer structures on both sides of the hinge sheet 3 may be the same as each other, but may be different from each other on each surface. For example, while the core sheet 2, the laser marking sheet 1, and the protective sheet 4 are provided in this order on one surface of the hinge sheet 3, the core sheet 2 and the marking sheet 1 are provided in this order on the other surface of the hinge sheet 3, and the protective sheet 4 may be omitted.

[0111] The passport may include a sublimation thermal transfer image receiving layer as described for the above card. Also, the passport may have a so-called inlet sheet in which various information is stored and arranged in a storage medium such as an IC chip. The inlet sheet may be provided, for example, between the hinge sheet and the core sheet. The hinge sheet holds a recording layer, a core sheet, an inlet sheet, etc., and serves to firmly bind the passport cover and other visa sheets together. Therefore, it is preferably one having strong heat fusibility, appropriate flexibility, heat resistance in the heat fusion process, etc.

[0112] Known hinge sheets can be used, and it may be a resin sheet composed of thermoplastic resins or thermoplastic elastomers such as thermoplastic polyester resins, thermoplastic polyester elastomers, thermoplastic polyamide resins, thermoplastic polyamide elastomers, thermoplastic polyurethane resins, thermoplastic polyurethane elastomers, etc., or it may be composed of woven fabrics, knitted fabrics, or non-woven fabrics, or it may be a composite material of woven fabrics, knitted fabrics, or non-woven fabrics and thermoplastic resins or thermoplastic elastomers, etc. Also, the core sheet in the passport is the same as above except that it is preferably 50 to 200 μm thick. Also, the protective sheet in the passport is as described above. In the case of a passport, the core sheet, the laser marking sheet, and the protective sheet are preferably appropriately overlapped and then pressed and heat fused so as to have the above-described layer structure. Also, the sheets may be adhered to each other with an adhesive instead of heat fusion.

[0113] The card or passport may be provided with at least one of the core sheet, the laser marking sheet, and the protective sheet provided on the card or passport with the above-described film. By providing at least any of these sheets with the film, it becomes easy to fuse the sheets together at a low temperature. Also, since there is little dimensional change when heated, the workability in manufacturing the card or passport is improved, and warping of the card or passport can also be prevented.

[0114] Further, this film is preferably provided on either the laser marking sheet or the core sheet as described above. For example, in the configurations shown in FIGS. 1(a), (b) or FIGS. 2(a), (b), it is more preferable to provide this film on either the core sheet 2 or the laser marking sheet 1. Further, when the resin composition of the present invention contains a colorant, it is preferable to provide this film on the laser marking sheet 1. Also, in the configurations shown in FIGS. 1(c) or 2(c), it is preferable to provide this film on the core sheet 2.

[0115] In a card or passport, the core sheet, the laser marking sheet, and the protective sheet may have a multilayer structure as described above. In that case, at least one layer may preferably be made of the above-mentioned film. Further, this film may be arranged on the outermost layer in each sheet. Since the sheet with this film arranged on the outermost layer will be laminated on other sheets through this film, it can be surely fused to other sheets even by low-temperature heating.

[0116] Note that for a card or passport, at least one resin layer constituting the core sheet, the laser marking sheet, and the protective sheet may be formed of this film, and the other resin layers do not necessarily have to be formed of this film. The resin used for the other resin layers in such a case is not particularly limited as long as it is a thermoplastic resin, and examples thereof include polycarbonate resins, polyester resins, or mixtures thereof.

Examples

[0117] Examples and comparative examples are shown below, but the present invention is not limited by these in any way.

[0118] The evaluation methods and measurement methods are as follows.

[0119] (1) Low-temperature fusibility Using a compression molding machine "NF-37" (manufactured by Shindo Metal Industry Co., Ltd.), the films (size 100 mm × 300 mm) obtained in each example and comparative example were overlapped, sandwiched between stainless steel plates, and pressed at a pressure of 1.5 MPa for 5 minutes. Then, cooling was carried out for about 5 minutes until the temperature dropped to room temperature, and heat fusion was performed. After that, the fused film was taken out from the stainless steel plate, and the films were peeled off from each other to check whether the films were inseparable (whether the material was broken). The heating temperature during pressing was increased in 10 °C increments. Those that were inseparable (the materials that were broken) were judged to be fused, and the lowest fusion temperature (material breakdown temperature) was determined. This material breakdown temperature is the temperature at which the film is appropriately fused, and the lower it is, the better the low-temperature fusion property is indicated.

[0120] (2) Solvent resistance Under a room temperature environment, the film pieces of each example and comparative example were immersed in a petri dish containing a solvent for 1 minute, and the appearance was visually confirmed and evaluated according to the following evaluation criteria. This test was carried out using ethyl acetate, toluene, and methyl ethyl ketone (MEK) as solvents respectively. Those rated as "OK" are presumed to be at a level where there is no problem for use as a practical product. OK: Cloudy within 30 seconds to 1 minute NG: Dissolve within 30 seconds

[0121] (3) Glass transition temperature (Tg) For each resin used, using a viscoelastic spectrometer "DVA-200" (manufactured by IT Measurement and Control Co., Ltd.), in accordance with JIS K7244-4:1999, the temperature dispersion measurement of dynamic viscoelasticity was carried out at a strain of 0.07%, a frequency of 1 Hz, a heating rate of 3 °C / min, and in a tensile mode. Then, the temperature at the peak top of the loss elastic modulus was taken as the glass transition temperature.

[0122] (4) Storage elastic modulus Test pieces measuring 4 mm × 25 mm (thickness: 100 μm) were cut out from the films obtained in each of the examples and comparative examples, and used as measurement samples. Using the measurement samples, in accordance with JIS K7244-4:1999, a viscoelastic spectrometer “DVA-200 (manufactured by IT Measurement & Control Co., Ltd.)” was used to increase the temperature from -100 to 180°C at a rate of 3°C / min at a frequency of 1 Hz and a strain of 0.07%, and the tensile storage modulus at 100°C was measured for MD.

[0123] (5) Heat shrinkage rate Test pieces measuring 120 mm × 120 mm were cut out from the films obtained in each of the examples and comparative examples, a standard line measuring 100 mm × 100 mm was marked in the center of the obtained test pieces, and heat treatment was performed in an oven at 110°C or 140°C for 10 minutes. From the standard line intervals of MD and TD before and after the treatment, it was calculated using the following formula. The measurement of the standard line interval was performed at the center of the standard line. Heat shrinkage rate (%) = [(standard line interval after heat treatment (mm) - 100 (mm)) / 100 (mm)] × 100 It can be said that the closer the heat shrinkage rate of the film is to a value of 0, the better the heat resistance.

[0124] The raw materials used in the examples and comparative examples are as follows. (Polyester resin) PCTG: A copolyester resin (amorphous) of a dicarboxylic acid composed of terephthalic acid and a dihydroxy compound composed of ethylene glycol (EG), 1,4-cyclohexanedimethanol (1,4-CHDM), and 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCD), dihydroxy compound (EG = 8 mol%, 1,4-CHDM = 74 mol%, TMCD = 18 mol%), recycled polyester resin regenerated from end materials, glass transition temperature (Tg) = 100°C PETG: A copolyester resin (amorphous) of a dicarboxylic acid component composed of terephthalic acid and a dihydroxy compound composed of EG and 1,4-CHDM, dihydroxy compound (EG = 70 mol%, 1,4-CHDM = 30 mol%), glass transition temperature (Tg) = 78°C (Polycarbonate resin) PC1: "Caliber 301-4" manufactured by Sumitomo Polycarbonate Co., Ltd., melt flow rate (300 °C, 1.2 kgf) = 4 g / min (catalog value), glass transition temperature (Tg) = 150 °C PC2: Bisphenol A-based homopolycarbonate, melt flow rate (300 °C, 1.2 kgf) = 20 g / min, recycled polycarbonate resin regenerated from end materials, glass transition temperature (Tg) = 150 °C (Colorant) Titanium oxide (Lubricant) Polyethylene glycol (number average molecular weight 3000): Sodium dodecylbenzenesulfonate = 2:1 (mass ratio) (Impact modifier) Impact modifier: Core-shell type elastomer, "Metablen S-2001" manufactured by Mitsubishi Chemical Corporation, core: silicone-acrylic composite rubber (Antioxidant) Antioxidant: Phenolic antioxidant (dibutylhydroxytoluene (BHT): Phosphorus-based antioxidant (tristearyl phosphite) = 1:1 (mass ratio)

[0125] [Examples 1 to 3, Comparative Examples 1, 3, 4] According to the formulation described in Table 1, the resin, or the resin and additives were put into a twin-screw extruder and kneaded, and the resin composition was extruded at 270 °C using a twin-screw extruder to obtain a film with a thickness of 100 μm.

[0126] [Comparative Example 2] The procedure was the same as in Example 1, except that the formulation was changed as shown in Table 1 and the extrusion temperature was changed from 270 °C to 250 °C.

[0127]

Table 1

[0128] As shown in Table 1, the resin compositions of Examples 1 to 3 contained a polyester resin (A-1) containing a structural unit derived from a chain dihydroxy compound and having a glass transition temperature of 90°C or higher, resulting in good low-temperature fusibility and excellent solvent resistance. Further, by containing a polycarbonate resin (B) in addition to the polyester resin (A-1), the storage elastic modulus at 100°C was high and the heat resistance was excellent, so that the heating shrinkage rate when heated at 110°C and 140°C was close to 0%, a low value. Therefore, it can be understood that when using this resin composition to manufacture a card or a passport, the size change during heat processing is small, the workability is high, and the occurrence of warping can be suppressed.

[0129] On the other hand, although the resin composition of Comparative Example 1 contained a polycarbonate resin (B), it did not contain a polyester resin (A-1). Therefore, although the heat resistance was good, the low-temperature fusibility and solvent resistance could not be improved. Further, since the resin composition of Comparative Example 2 did not contain both a polycarbonate resin (B) and a polyester resin (A-1), both heat resistance and solvent resistance could not be improved. Note that Comparative Example 2 is excellent in low-temperature fusibility by using a polyester resin (A-2) having a glass transition temperature of less than 90°C. When the films of Comparative Example 2 are fused at a low temperature, the size change is suppressed and the workability is good, but only cards and passports with low heat resistance can be obtained. On the other hand, when trying to increase the heat resistance of a card or a passport by fusing the film of Comparative Example 2 to a film with high heat resistance (for example, a polycarbonate film), it is necessary to increase the fusion temperature. However, when the fusion temperature is high, the film of Comparative Example 2 undergoes a size change, the workability deteriorates, and warping occurs. That is, it can be understood that it is difficult to exhibit the effects of the present invention even when combined with other films when using the resin composition of Comparative Example 2.

[0130] The resin compositions of Comparative Examples 3 and 4 contain a polyester resin (A) and a polycarbonate resin (B), but as the polyester resin (A), a polyester resin (A-1) that contains a structural unit derived from a chain dihydroxy compound and has a glass transition temperature of 90°C or higher was not used. Therefore, the solvent resistance, or the solvent resistance and heat resistance did not become good.

[0131] 1 Laser marking sheet 2 Core sheet 3 Hinge sheet 4 Protective sheet 20A, 20B, 20C Cards 10A, 10B, 10C Passports

Claims

1. A resin composition containing a resin component comprising a polyester resin (A-1) and a polycarbonate resin (B), wherein the polyester resin (A-1) contains structural units derived from a chain dihydroxy compound and an alicyclic dihydroxy compound, and the proportion of the structural units derived from the alicyclic dihydroxy compound is 90 mol% or more in a total of 100 mol% of the structural units derived from the chain dihydroxy compound and the structural units derived from the alicyclic dihydroxy compound, and the glass transition temperature of the polyester resin (A-1) is 90°C or higher, a resin composition for a card or a passport.

2. The storage elastic modulus at 100 °C is 1 × 10 ９ Pa or more, and the resin composition for a card or passport according to claim 1.

3. The resin composition for a card or a passport according to claim 1 or 2, wherein the polyester resin (A-1) contains structural units derived from ethylene glycol and structural units derived from cyclohexanedimethanol.

4. The resin composition for a card or a passport according to any one of claims 1 to 3, wherein the polyester resin (A-1) contains structural units derived from ethylene glycol, structural units derived from cyclohexanedimethanol, and structural units derived from tetramethylcyclobutanediol.

5. The resin composition for a card or a passport according to any one of claims 1 to 4, wherein the content ratio ((A-1) / (B)) of the polyester resin (A-1) and the polycarbonate resin (B) is 3 / 97 or more and 97 / 3 or less by mass ratio.

6. The resin composition for a card or a passport according to any one of claims 1 to 5, containing a recycled raw material.

7. A film for a card or a passport comprising the resin composition according to any one of claims 1 to 6.

8. A card comprising the film according to claim 7.

9. A passport comprising the film according to claim 7.

10. A method for producing a resin composition according to any one of claims 1 to 6, wherein a recycled raw material is blended into the resin composition.

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