WO2014057828A1 - 半芳香族ポリアミドフィルム - Google Patents
半芳香族ポリアミドフィルム Download PDFInfo
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- WO2014057828A1 WO2014057828A1 PCT/JP2013/076473 JP2013076473W WO2014057828A1 WO 2014057828 A1 WO2014057828 A1 WO 2014057828A1 JP 2013076473 W JP2013076473 W JP 2013076473W WO 2014057828 A1 WO2014057828 A1 WO 2014057828A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/265—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from at least two different diamines or at least two different dicarboxylic acids
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/06—Polyamides derived from polyamines and polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Definitions
- the present invention relates to a semi-aromatic polyamide film.
- Semi-aromatic polyamide which is a polycondensate of aliphatic diamine and phthalic acid, is superior in various performances including heat resistance, compared to aliphatic polyamide. Therefore, in recent years, development for using a semi-aromatic polyamide for the purpose of a film or a molded body has been advanced.
- JP09-017144A describes nylon 9T, which is composed of an aliphatic diamine having 9 carbon atoms and terephthalic acid as a semi-aromatic polyamide.
- Nylon 9T has a high melting point in the vicinity of 300 ° C., and thus has high heat resistance and relatively low water absorption. Therefore, dimensional change due to water absorption is unlikely to occur. Therefore, the use of nylon 9T is attracting attention in various industrial applications.
- nylon 9T Since nylon 9T has the characteristics as described above, the film can achieve both heat resistance and dimensional stability, which was difficult with a conventional thermoplastic film. Accordingly, the development of nylon 9T as a film material has been actively promoted. In particular, it is expected that a film obtained from nylon 9T will be applied in the field of so-called industrial films such as electronic / electrical parts and optical applications.
- a film made of nylon 9T has a high elastic modulus at room temperature, and therefore may not have sufficient resistance to deformation. Furthermore, there is a problem that deformation resistance is lowered by heat treatment at high temperature.
- JP 2004-217698A discloses a resin composition in which an elastomer and a crosslinking agent are added to polyamide.
- this resin composition it is possible to obtain oil resistance, heat resistance, gas barrier properties, and flexibility by dispersing an elastomer in polyamide.
- an elastomer is formed into a fine sphere having a diameter of about 0.1 to 30 ⁇ m, and dispersed in polyamide to obtain thermoplasticity, such as extrusion molding, injection molding, press molding, etc.
- General-purpose heat-melt molding is possible.
- it is already known as an incompatible polymer alloy technology to improve impact resistance by finely dispersing an elastomer in polyamide.
- JP2004-217698A is applied to a method for producing a stretched thin film, in which the processing method is completely different from heat melt molding, and deformation occurs during processing and anisotropy increases in the deformation direction. It is difficult to apply. Furthermore, the above-mentioned problem that the known film composed of nylon 9T is not sufficiently resistant to deformation, and the resistance to deformation after heat treatment is not satisfactory is solved by the technique described in JP2004-217698A. It is impossible.
- an object of the present invention is to obtain a semi-aromatic polyamide film composed of nylon 9T and sufficiently provided with deformation resistance such as flexibility, bending resistance and keystroke durability. To do.
- the present inventors have found that the above object can be achieved by mixing a semi-aromatic polyamide and a specific elastomer, and allowing the elastomer to exist in a specific dispersion state in the semi-aromatic polyamide, thereby completing the present invention. It came to do.
- the gist of the present invention is as follows.
- a semi-aromatic polyamide film comprising 2 to 10% by mass of a thermoplastic elastomer (B) having a stretched structure.
- thermoplastic elastomer (B) having a functional group is an olefin-based thermoplastic elastomer modified with dicarboxylic acid and / or a derivative thereof.
- thermoplastic elastomer (B) The average minor axis of the domains of the thermoplastic elastomer (B) is 0.01 to 1.0 ⁇ m, and the average domain spacing of the thermoplastic elastomer (B) in the longitudinal section of the film is 0.1 to 1
- thermoplastic elastomer (B) is dispersed in the film in a state of 0.5 ⁇ m.
- the semiaromatic polyamide film of the present invention comprises 98 to 90% by mass of a semiaromatic polyamide (A) containing a specific dicarboxylic acid and a specific diamine, and 2 to 10% by mass of a thermoplastic elastomer (B) having a functional group. % And is stretched. Therefore, according to the present invention, it is possible to provide a semi-aromatic polyamide film having high heat resistance, excellent stretchability and deformation resistance, and small thickness unevenness. Therefore, the semi-aromatic polyamide film of the present invention is used as a film for electronic / electrical parts or optical applications, that is, a so-called industrial film, in particular, a substrate film or coverlay film for FPC, or an insulation for a switch or touch panel. It can be suitably used as a film or the like.
- the semi-aromatic polyamide film of the present invention contains a dicarboxylic acid containing terephthalic acid as a main component and a semi-aromatic polyamide (A) 98 to 90 containing a diamine containing an aliphatic diamine having 9 carbon atoms as a main component.
- A semi-aromatic polyamide
- This is a stretched film containing 2% by mass and 2 to 10% by mass of a thermoplastic elastomer (B) having a functional group.
- the dicarboxylic acid component constituting the semi-aromatic polyamide (A) needs to have terephthalic acid as a main component.
- the proportion of terephthalic acid in the dicarboxylic acid component is preferably 60 to 100 mol%, more preferably 70 to 100 mol%, and still more preferably 85 to 100 mol%.
- the proportion of terephthalic acid in the dicarboxylic acid component is 60 to 100 mol%, a polyamide having high heat resistance and low water absorption can be obtained.
- dicarboxylic acid components other than terephthalic acid contained in the dicarboxylic acid component constituting the semi-aromatic polyamide (A) include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, dodecanedioic acid, and tetradecane.
- dicarboxylic acids such as diacid and octadecanedioic acid
- aromatic dicarboxylic acids such as 1,4-naphthalenedicarboxylic acid, 1,3-naphthalenedicarboxylic acid, 1,2-naphthalenedicarboxylic acid and isophthalic acid.
- the diamine component of the semi-aromatic polyamide (A) needs to have an aliphatic diamine having 9 carbon atoms as a main component.
- the proportion of the aliphatic diamine having 9 carbon atoms in the diamine component is preferably 60 to 100 mol%, more preferably 75 to 100 mol%, and further preferably 90 to 100 mol%. preferable.
- the proportion of the aliphatic diamine having 9 carbon atoms is 60 to 100 mol%, the heat resistance and chemical resistance of the resulting film are improved, and the water absorption is lowered.
- Examples of the aliphatic diamine having 9 carbon atoms include linear aliphatic diamines such as 1,9-nonanediamine, 2-methyl-1,8-octanediamine, and 4-methyl-1,8-octanediamine. And branched aliphatic diamines such as These may be used alone or in combination of two or more. Of these, 1,9-nonanediamine and 2-methyl-1,8-octanediamine are preferably used in combination from the viewpoint of moldability.
- Examples of the diamine component other than the aliphatic diamine having 9 carbon atoms contained in the diamine component constituting the semi-aromatic polyamide (A) include 1,4-butanediamine, 1,5-pentanediamine, Linear aliphatic diamines such as 1,6-hexanediamine, 1,7-heptanediamine, 1,8-octanediamine, 1,10-decanediamine, 1,11-undecanediamine, 1,12-dodecanediamine, Branched chain aliphatic diamines such as 4-methyl-1,8-octaneamine and 5-methyl-1,9-nonanediamine, alicyclic diamines such as isophoronediamine, norbornanedimethylamine, and tricyclodecanedimethylamine; And aromatic diamines such as phenylenediamine.
- the semi-aromatic polyamide (A) may be copolymerized with lactams such as ⁇ -caprolactam, ⁇ -enantolactam, ⁇ -capryllactam, and ⁇ -laurolactam, as long as the object of the present invention is not impaired. .
- a dicarboxylic acid component consisting only of terephthalic acid (100 mol% terephthalic acid);
- a semi-aromatic polyamide (A) comprising a diamine component containing 9 to nonanediamine and 2-methyl-1,8-octanediamine in a total amount of 60 to 100 mol% in the diamine component is preferred.
- the copolymerization ratio (molar ratio) of 1,9-nonanediamine and 2-methyl-1,8-octanediamine is (1,9-nonanediamine) / (2-methyl).
- -1,8-octanediamine) 50/50 to 100/0, more preferably 70/30 to 100/0, and even more preferably 75/25 to 95/5.
- the copolymerization ratio (molar ratio) of 1,9-nonanediamine and 2-methyl-1,8-octanediamine is 50/50 to 100/0, the heat resistance of the resulting film is improved and the water absorption is improved. Sexuality decreases.
- the type and copolymerization ratio of the monomers constituting the semiaromatic polyamide (A) are preferably selected so that the Tm (melting point) of the semiaromatic polyamide (A) to be obtained is in the range of 280 to 350 ° C. .
- Tm melting point
- the type and copolymerization ratio of the monomers constituting the semiaromatic polyamide (A) are preferably selected so that the Tm (melting point) of the semiaromatic polyamide (A) to be obtained is in the range of 280 to 350 ° C. .
- the intrinsic viscosity of the semi-aromatic polyamide (A) is preferably 0.8 to 2.0 dL / g, and more preferably 0.9 to 1.8 dL / g.
- the intrinsic viscosity of (A) is 0.8 to 2.0 dL / g, a film having excellent mechanical properties can be obtained.
- the intrinsic viscosity of the semi-aromatic polyamide (A) is less than 0.8 dL / g, it may be difficult to form a film and maintain the film shape. On the other hand, if it exceeds 2.0 dL / g, adhesion to the cooling roll becomes difficult during film production, and the appearance of the film may deteriorate.
- a commercially available product can be suitably used as the semi-aromatic polyamide (A).
- Examples of such commercially available products include “Genesta (registered trademark)” manufactured by Kuraray Co., Ltd.
- Semi-aromatic polyamide (A) can be produced by using any method known as a method for producing crystalline polyamide. Examples thereof include a solution polymerization method or an interfacial polymerization method using an acid chloride and a diamine component as raw materials. Alternatively, a method of preparing a prepolymer using a dicarboxylic acid component and a diamine component as raw materials and increasing the molecular weight of the prepolymer by melt polymerization or solid phase polymerization can be mentioned.
- the prepolymer can be obtained, for example, by heat-polymerizing a nylon salt prepared by mixing a diamine component, a dicarboxylic acid component and a polymerization catalyst at a temperature of 200 to 250 ° C.
- the intrinsic viscosity of the prepolymer is preferably 0.1 to 0.6 dL / g.
- the intrinsic viscosity of the prepolymer is preferably 0.1 to 0.6 dL / g.
- the solid phase polymerization of the prepolymer is preferably performed under reduced pressure or under an inert gas flow.
- the temperature of the solid phase polymerization is preferably 200 to 280 ° C.
- the temperature of the solid phase polymerization is less than 200 ° C., the polymerization time becomes long, and thus the productivity may be poor.
- the melt polymerization of the prepolymer is preferably performed at a temperature of 350 ° C. or lower. By carrying out the polymerization at a temperature of 350 ° C. or lower, the polymerization can be carried out efficiently while suppressing decomposition and thermal deterioration.
- the above melt polymerization includes melt polymerization using a melt extruder.
- a polymerization catalyst is used.
- a phosphorus-based catalyst is preferably used from the viewpoints of reaction rate and economy.
- the phosphorus-based catalyst include hypophosphorous acid, phosphorous acid, phosphoric acid, salts thereof (for example, sodium hypophosphite), or esters thereof (for example, 2,2-methylenebis (di-t-)).
- Butylphenyl) octyl phosphite and the like may be used alone or in combination of two or more.
- a semi-aromatic polyamide (A) obtained by polymerization using phosphorous acid as a polymerization catalyst is more preferable.
- phosphorous acid as the polymerization catalyst, a filter is used in film formation as compared with the case of using a semi-aromatic polyamide polymerized using another polymerization catalyst (for example, hypophosphorous acid catalyst). The increase in the filtration pressure at the time of filtration of the film forming raw material by this can be suppressed.
- the content of the polymerization catalyst in the obtained semi-aromatic polyamide (A) is preferably 0.01 to 5% by mass, and 0.05 to 2% by mass with respect to the total amount of the dicarboxylic acid component and the diamine component. % Is more preferable, and 0.07 to 1% by mass is even more preferable.
- the content of the polymerization catalyst is 0.01 to 5% by mass, the semiaromatic polyamide can be efficiently polymerized while suppressing the deterioration of the semiaromatic polyamide.
- the content of the polymerization catalyst is less than 0.01% by mass, the catalytic action may not be exhibited. On the other hand, when it exceeds 5 mass%, it may become disadvantageous from an economical viewpoint.
- an end-capping agent may be used together with the diamine component, dicarboxylic acid component and polymerization catalyst as necessary.
- a terminal blocking agent is not particularly limited as long as it is a monofunctional compound having reactivity with an amino group or a carboxyl group at the terminal of the semi-aromatic polyamide (A).
- Examples of such end-capping agents include monocarboxylic acids, monoamines, acid anhydrides, monoisocyanates, monohalides, monoesters, and monoalcohols.
- monocarboxylic acids or monoamines are preferable from the viewpoints of reactivity and stability of the sealed end groups, and monocarboxylic acids are more preferable from the viewpoint of ease of handling.
- monocarboxylic acid include acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, lauric acid, tridecylic acid, myristic acid, palmitic acid, stearic acid, and benzoic acid.
- the amount of the end-capping agent used can be appropriately selected depending on the reactivity, boiling point, reaction apparatus, reaction conditions, etc. of the end-capping agent used.
- the detailed amount of the end-capping agent is preferably 0.1 to 15 mol% with respect to the total number of moles of the dicarboxylic acid component and the diamine component, from the viewpoint of adjusting the molecular weight and suppressing the decomposition of the resin.
- the end group of the molecular chain is sealed with the above-described end-capping agent.
- the ratio of the amount of terminal groups that are end-capped with respect to the total amount of terminal groups is preferably 10 mol% or more, more preferably 40 mol% or more, and even more preferably 70 mol% or more.
- thermoplastic elastomer (B) having a functional group used in the present invention will be described.
- thermoplastic elastomer (B) used in the present invention includes a hard segment and a soft segment.
- the hard segment may be a crystalline resin or an amorphous resin.
- the melting point thereof is preferably 150 ° C. or lower, more preferably 130 ° C. or lower.
- the glass transition temperature is preferably 120 ° C. or lower.
- the melting point of the resin used for the hard segment is 150 ° C. or lower or the glass transition temperature is 120 ° C. or lower, the polymer containing the semiaromatic polyamide (A) and the thermoplastic elastomer (B) is biaxially stretched. Stretching can be efficiently performed with improved stretchability.
- thermoplastic elastomer (B) When the melting point of the resin used for the hard segment exceeds 150 ° C, or when the glass transition temperature exceeds 120 ° C, uniform stretching cannot be performed, and the predetermined dispersion state of the thermoplastic elastomer (B) is When it cannot obtain, the planarity of a stretched film may deteriorate. Moreover, a void may generate
- the soft segment is a rubber-based resin.
- the glass transition temperature of the resin is preferably ⁇ 30 ° C. or lower, and more preferably ⁇ 40 ° C. or lower. When the glass transition temperature of the resin used for the soft segment is ⁇ 30 ° C. or lower, the bending resistance and keystroke durability of the obtained stretched film are improved.
- thermoplastic elastomer (B) examples include polyolefin-based thermoplastic elastomers, polyester-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, and styrene-based thermoplastic elastomers. These thermoplastic elastomers (B) may be used independently and 2 or more types may be used together.
- polyolefin-based thermoplastic elastomer examples include those in which the hard segment is a thermoplastic highly crystalline polyolefin and the soft segment is an ethylene- ⁇ -olefin copolymer rubber.
- the hard segment includes, for example, an ⁇ -olefin homopolymer having 1 to 4 carbon atoms or a copolymer of two or more thereof.
- polyethylene or polypropylene is preferable.
- soft segments examples include butyl rubber, halobutyl rubber, EPDM (ethylene / propylene / diene rubber), EPR (ethylene / propylene rubber), acrylonitrile / butadiene rubber, NBR (nitrile rubber), EBR (ethylene / 1-butene rubber), natural Rubber.
- polyester-based thermoplastic elastomer for example, high melting point and highly crystalline aromatic polyester such as polybutylene terephthalate (PBT) is used for the hard segment, and amorphous such as polytetramethylene ether glycol (PTMG) is used for the soft segment. And multi-block polymers in which a functional polyether is used.
- PBT polybutylene terephthalate
- PTMG polytetramethylene ether glycol
- multi-block polymers in which a functional polyether is used.
- polyamide-based thermoplastic elastomer examples include block polymers in which the hard segment is polyamide such as nylon and the soft segment is polyester or polyol.
- styrene-based thermoplastic elastomer examples include a polymer whose hard segment is polystyrene and whose soft segment is a copolymer of a conjugated diene compound and a hydrogenated product thereof.
- soft segment examples include isoprene rubber, butadiene rubber, hexadiene rubber, and 2,3-dimethyl-1,3-butadiene.
- the thermoplastic elastomer (B) used in the present invention needs to have a functional group capable of reacting with an amino group or a carboxyl group which is a terminal group of the semi-aromatic polyamide (A) and an amide group of the main chain.
- the functional group is preferably at least one functional group selected from a carboxyl group or an anhydride thereof, an amino group, a hydroxyl group, an epoxy group, an amide group and an isocyanate group, and more preferably a dicarboxylic acid and / or a derivative thereof.
- thermoplastic elastomer that does not have a functional group capable of reacting with the terminal group of the semi-aromatic polyamide (A)
- the stretchability during biaxial stretching may be reduced, and a uniform stretched film may not be obtained.
- the deformation resistance of the obtained stretched film may become insufficient.
- thermoplastic elastomer is preferably a polyolefin-based thermoplastic resin.
- a resin include Tuffmer manufactured by Mitsui Chemicals.
- the biaxially stretched semi-aromatic polyamide film of the present invention has a blending ratio (A) / (B) of the semi-aromatic polyamide (A) and the thermoplastic elastomer (B) of 98/2 to 90/10 (mass ratio). It is necessary that it is 96/4 to 92/8 (mass ratio).
- the blending ratio of the thermoplastic elastomer (B) is less than 2% by mass, the effect of addition is small, and the stretch resistance of the stretched film may be insufficient.
- thermoplastic elastomer (B) exceeds 10% by mass, not only is the quality excessive, but the melt viscosity at the time of extrusion film formation is too high, resulting in poor film formability, and stretching at the biaxial stretching. In some cases, a uniform stretched film cannot be obtained due to a decrease in properties.
- the kneader used for kneading the semi-aromatic polyamide (A) and the thermoplastic elastomer (B) is not particularly limited.
- a well-known melt kneader is mentioned.
- a twin screw extruder is preferable from the viewpoint of improving the dispersibility of the thermoplastic elastomer (B).
- the melt kneading temperature is usually not less than the melting point of the semi-aromatic polyamide (A).
- thermoplastic elastomer (B) may be kneaded with the semi-aromatic polyamide (A) at the time of film production, or after preparing a master batch in which the thermoplastic elastomer (B) is blended at a high concentration, the master batch May be kneaded with the semi-aromatic polyamide (A).
- the semi-aromatic polyamide film of the present invention is to improve thermal stability during film formation, prevent deterioration of film strength and elongation, and prevent deterioration of the film due to oxidation or decomposition during use. It is preferable to contain a heat stabilizer.
- the heat stabilizer include a hindered phenol heat stabilizer, a hindered amine heat stabilizer, a phosphorus heat stabilizer, a sulfur heat stabilizer, and a bifunctional heat stabilizer.
- hindered phenol heat stabilizer examples include Irganox 1010 (registered trademark) (manufactured by BASF Japan, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate]), Irganox 1076 (Registered trademark) (manufactured by BASF Japan, octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate), Cyanox 1790 (registered trademark) (manufactured by Cyanamid, 1,3,5-Tris) (4-t-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid), Irganox 1098 (registered trademark) (manufactured by BASF Japan, N, N ′-(hexane-1,6-diyl) bis [3 -(3,5-di-tert-but
- hindered amine heat stabilizer examples include Nylostab S-EED (registered trademark) (manufactured by Clariant Japan, 2-ethyl-2'-ethoxy-oxalanilide).
- Examples of phosphorus heat stabilizers include Irgafos 168 (registered trademark) (manufactured by BASF Japan, Tris (2,4-di-tert-butylphenyl) phosphite), Irgafos 12 (registered trademark) (manufactured by BASF Japan, 6 , 6 ', 6 "-[nitrilotris (ethyleneoxy)] tris (2,4,8,10-tetra-tert-butyldibenzo [d, f] [1,3,2] dioxaphosphine)) Irgafos 38 (registered trademark) (manufactured by BASF Japan, bis (2,4-bis (1,1-dimethylethyl) -6-methylphenyl) ethyl ester phosphorous acid), ADKSTAB329K (registered trademark) (manufactured by Asahi Denka Co., Ltd.) , Tris (mono
- sulfur-based heat stabilizer examples include DSTP (registered trademark) (manufactured by Yoshitomi Co., Ltd., chemical name: distearyl thiodipropionate), Seeox 412S (registered trademark) (manufactured by Cypro Kasei Co., Ltd., pentaerythritol tetrakis- (3- Dodecylthiopropionate)), Cyanox 1212 (registered trademark) (produced by Cyanamid Co., Ltd., lauryl stearyl thiodipropionate).
- DSTP registered trademark
- Seeox 412S registered trademark
- Cypro Kasei Co., Ltd. pentaerythritol tetrakis- (3- Dodecylthiopropionate)
- Cyanox 1212 registered trademark
- bifunctional heat stabilizer examples include Sumilizer GM (registered trademark) (Sumitomo Chemical Co., Ltd., 2-tert-butyl-6- (3-tert-butyl-2-hydroxy-5-methylbenzyl) -4. -Methylphenyl acrylate), Sumilizer GS (registered trademark) (manufactured by Sumitomo Chemical Co., Ltd., 2- [1- (2-hydroxy-3,5-di-tert-pentylphenyl) ethyl] -4,6-di-tert- Pentylphenyl acrylate).
- a hindered phenol heat stabilizer is preferred.
- the thermal decomposition temperature of the hindered phenol heat stabilizer is preferably 320 ° C or higher, more preferably 350 ° C or higher.
- Examples of hindered phenol heat stabilizers having a thermal decomposition temperature of 320 ° C. or higher include Sumilizer GA-80.
- the hindered phenol heat stabilizer has an amide bond, it is possible to prevent deterioration of film strength.
- examples of the hindered phenol heat stabilizer having an amide bond include Irganox 1098.
- a bifunctional heat stabilizer is used in combination with the hindered phenol heat stabilizer, the deterioration of the film strength can be further reduced.
- heat stabilizers may be used alone or in combination of two or more.
- a hindered phenol heat stabilizer and a phosphorus heat stabilizer are used in combination, it is possible to prevent pressure increase of the raw material filter during film formation and to prevent deterioration of film strength.
- a hindered phenol heat stabilizer, a phosphorus heat stabilizer, and a bifunctional heat stabilizer are used in combination, it is possible to prevent the pressure increase of the filter for raw material filtration during film formation, and to improve the film strength. Degradation can be further reduced.
- a combination of a hindered phenol heat stabilizer and a phosphorus heat stabilizer a combination of Hostanox P-EPQ or GSY-P101 and Sumilizer GA-80 or Irganox 1098 is preferable.
- a combination of a hindered phenol heat stabilizer, a phosphorus heat stabilizer, and a bifunctional heat stabilizer a combination of HostanoxP-EPQ or GSY-P101, Sumilizer GA-80 or Irganox 1098, and Sumilizer GS is preferable.
- GSY-P101, a combination of a Summarizer GA-80 and a Summarizer GS is more preferable.
- the content of the heat stabilizer in the semiaromatic polyamide film of the present invention is preferably 0.01 to 2 parts by mass with respect to 100 parts by mass of the semiaromatic polyamide (A), preferably 0.05 to More preferably, it is 1 part by mass.
- the content of the heat stabilizer is 0.01 to 2 parts by mass, thermal decomposition can be more efficiently suppressed.
- the semi-aromatic polyamide film of the present invention may contain lubricant particles in order to improve the slipperiness.
- lubricant particles include inorganic particles such as silica, alumina, titanium dioxide, calcium carbonate, kaolin, and barium sulfate, and organic fine particles such as acrylic resin particles, melamine resin particles, silicone resin particles, and crosslinked polystyrene particles. It is done.
- the semi-aromatic polyamide film of the present invention may contain various additives as required within a range not impairing the effects of the present invention.
- additives include colorants such as pigments and dyes, anti-coloring agents, antioxidants different from the above heat stabilizers, weather resistance improvers, flame retardants, plasticizers, mold release agents, reinforcing agents, and modifiers.
- Examples of the pigment include titanium oxide.
- Examples of the weather resistance improver include benzotriazole compounds.
- Examples of the flame retardant include bromine-based flame retardant and phosphorus-based flame retardant.
- Examples of the reinforcing agent include talc.
- the semi-aromatic polyamide film of the present invention needs to be stretched, that is, stretched uniaxially or biaxially, and preferably biaxially stretched. It is preferable that the polyamide resin is oriented and crystallized by stretching.
- the stretching conditions and magnification are not particularly limited, but when stretched in the biaxial direction, the longitudinal direction (hereinafter sometimes abbreviated as “MD”) and the width direction (hereinafter abbreviated as “TD”). Both are preferably stretched 2 times or more, more preferably 2.5 times or more.
- MD longitudinal direction
- TD width direction
- Both are preferably stretched 2 times or more, more preferably 2.5 times or more.
- the thickness unevenness of the stretched semi-aromatic polyamide film of the present invention is preferably 10% or less, more preferably 8% or less, and further preferably 6% or less.
- the thickness unevenness is 10% or less, sagging and wrinkles of the film when processing the film can be reduced.
- a method of adjusting the shape of the unstretched film or adjusting the stretching conditions can be mentioned. The definition of thickness unevenness and the measuring method thereof will be described in detail in the “Example” section below.
- the stretched semi-aromatic polyamide film of the present invention preferably has a smaller heat shrinkage rate.
- the thermal shrinkage rate by hot air heating at 200 ° C. for 15 minutes is preferably 3.0% or less, more preferably 1.0% or less, and further preferably 0.5% or less.
- a method of adjusting the conditions of heat treatment or relaxation treatment treatment for continuously reducing the width of the film to adjust the heat shrink property of the film. Is done.
- the tensile strength of the stretched semi-aromatic polyamide film of the present invention is preferably 130 MPa or more for both MD and TD, and the tensile elongation is preferably 50% or more for both TD and MD.
- a technique of adjusting the draw ratio is employed.
- the domain of the thermoplastic elastomer (B) in the stretched semi-aromatic polyamide film is usually plate-like and substantially parallel to the film surface.
- the dispersion state of the domains in the film can be evaluated by TEM photograph observation described later.
- the average minor axis of the domain of the thermoplastic elastomer (B) in the film, the average anisotropic index of the domain, the average domain interval, and the like can be evaluated.
- Deformation resistance due to force applied from the surface direction of the film because the average minor axis of the domain of the thermoplastic elastomer (B) is 0.01 to 1.0 ⁇ m and the average domain interval is 0.1 to 1.5 ⁇ m. Can be improved.
- the effect of improving deformation resistance may be insufficient, or the film quality such as thickness unevenness of the stretched film may be reduced. is there.
- the average anisotropic index is 10 to 50, the deformation resistance due to the force applied from the surface direction of the film can be further improved.
- the average minor axis of the domain of the thermoplastic elastomer (B) is more preferably 0.03 to 1.0 ⁇ m.
- the average domain interval of the thermoplastic elastomer (B) is more preferably 0.1 to 1.0 ⁇ m.
- the average anisotropic index of the domain of the thermoplastic elastomer (B) is more preferably 20-50.
- the improvement effect of deformation resistance may be insufficient, or the thickness unevenness of the stretched film, etc. The film quality may deteriorate.
- the average particle diameter of the thermoplastic elastomer (B) in the unstretched film is preferably 0.01 to 10 ⁇ m, and more preferably 0.05 to 5 ⁇ m.
- the melt viscosity of the semi-aromatic polyamide (A) and the thermoplastic elastomer (B) is approximated.
- thermoplastic elastomer (B) When mixing the semi-aromatic polyamide (A) and the thermoplastic elastomer (B), the blending ratio of the thermoplastic elastomer (B) is reduced, or the kneading screw is strongly kneaded based on the configuration and temperature conditions of the kneading screw. That's fine.
- the dispersion state of domains after stretching can be adjusted by controlling stretching conditions, specifically, stretching temperature, stretching ratio, relaxation treatment, and other conditions. For example, when an unstretched film is stretched, the anisotropy of the thermoplastic elastomer (B) can be increased and the domain spacing can be decreased by stretching the film with high orientation and high magnification.
- the stretched semi-aromatic polyamide film of the present invention can be subjected to a treatment for improving the adhesion of the surface, if necessary.
- a treatment for improving the adhesion include corona treatment, plasma treatment, acid treatment, and flame treatment.
- the surface of the stretched semi-aromatic polyamide film of the present invention may be coated with various coating agents in order to impart functions such as easy adhesion, antistatic properties, release properties, and gas barrier properties.
- the stretched semi-aromatic polyamide film of the present invention may be laminated with inorganic materials such as metals or oxides thereof, other polymers, paper, woven fabric, non-woven fabric, and wood.
- the semi-aromatic polyamide (A) and the thermoplastic elastomer (B) are blended in an appropriate ratio, and the blend is put in an extruder. Melt and mix at a temperature of 280 to 340 ° C. for 3 to 15 minutes, and then extrude into a sheet through a T-die. The extruded product is closely adhered to a drum whose temperature is adjusted to 30 to 80 ° C. and cooled.
- An unstretched film is manufactured, and the obtained unstretched film is then guided to a simultaneous biaxial stretching machine, and at a temperature of 120 to 150 ° C., both TD and MD are simultaneously stretched so that the stretching ratio is about 2 to 4 times.
- Examples of the method include biaxial stretching and heat treatment at 150 to 300 ° C. for several seconds with TD relaxation being several percent.
- the film Prior to the simultaneous biaxial stretching machine, the film may be subjected to preliminary longitudinal stretching of about 1 to 1.2 times.
- the biaxially stretched semi-aromatic polyamide film of the present invention can also be produced by a sequential stretching method.
- a sequential stretching method there is a method in which an unstretched film is obtained by performing the same operation as described above, and then subjected to a heat treatment such as roll heating or infrared heating, and then stretched in the longitudinal direction to obtain a longitudinally stretched film.
- This longitudinal stretching uses the difference in the peripheral speed of two or more rolls, and the glass transition point of the semi-aromatic polyamide is Tg and is 2.0 to 3.6 times in the temperature range of Tg to (Tg + 40 ° C.). It is preferable to stretch.
- the longitudinally stretched film is successively subjected to lateral stretching, heat setting, and relaxation treatment in order, thereby forming a biaxially stretched film.
- the transverse stretching starts in the same temperature range of Tg to (Tg + 40 ° C.) as in the longitudinal stretching, and the maximum temperature is 100 to 150 ° C. lower than the melting point (Tm) of the semiaromatic polyamide. preferable.
- the transverse stretching ratio is adjusted according to the required physical properties of the final film, but is preferably 2.5 times or more, and more preferably 3.0 times or more.
- an extension of 2 to 20% may be applied in the transverse direction, that is, the width direction of the film.
- the stretch ratio is included in the total draw ratio.
- a relaxation treatment is performed, and then the film is cooled below its Tg to obtain a biaxially stretched film.
- the surface of cylinders, barrel melting parts, metering parts, single tubes, filters, T dies, etc. is treated to reduce the surface roughness in order to prevent resin stagnation. It is preferable.
- a method for reducing the surface roughness include a method of modifying with a substance having a low polarity. Or the method of vapor-depositing silicon nitride and diamond-like carbon on the surface is mentioned.
- Examples of the method for stretching the film include a flat sequential biaxial stretching method, a flat simultaneous biaxial stretching method, and a tubular method. Among these, it is preferable to employ the flat simultaneous biaxial stretching method from the viewpoint of improving the thickness accuracy of the film and making the physical properties of the MD of the film uniform.
- Examples of the stretching apparatus for adopting the flat simultaneous biaxial stretching method include a screw type tenter, a pantograph type tenter, and a linear motor drive clip type tenter.
- the heat treatment after stretching is a process necessary for imparting dimensional stability of the film.
- the heat treatment method include known methods such as a method of blowing hot air, a method of irradiating infrared rays, and a method of irradiating microwaves. Among them, a method of blowing hot air is preferable because it can be heated uniformly and accurately.
- the obtained semi-aromatic polyamide film may be a single sheet or may be in the form of a film roll by being wound on a winding roll. From the viewpoint of productivity when used for various purposes, it is preferable to use a film roll. When it is a film roll, it may be slit to a desired width.
- the stretched semi-aromatic polyamide film of the present invention obtained as described above has flexibility and resistance in addition to the mechanical properties, heat resistance, moist heat resistance, chemical resistance and low water absorption inherent in nylon 9T. Excellent deformation resistance such as flexibility and keystroke durability.
- the stretched semi-aromatic polyamide film of the present invention is used for pharmaceutical packaging materials; food packaging materials such as retort foods; packaging materials for electronic components such as semiconductor packages; electricity for motors, transformers, cables, etc. Insulating materials; Dielectric materials for capacitor applications; Magnetic tape materials such as cassette tapes, magnetic tapes for data storage for digital data storage, and video tapes; solar cell substrates, liquid crystal plates, conductive films, display devices, etc.
- Protective plate for electronic substrate materials such as LED mounting substrate, flexible printed wiring board, flexible flat cable, etc .
- heat-resistant adhesive tape such as cover-lay film for flexible printed wiring, heat-resistant masking tape, industrial process tape; Heat resistant reflector; various release films; heat resistant adhesive Scan film; photographic film; molding material; agricultural materials; medical materials; civil engineering, building material; filtration membrane or the like, domestic, as a film for industrial materials can be suitably used.
- Intrinsic viscosity of semi-aromatic polyamide The semi-aromatic polyamide was added in concentrated sulfuric acid having a concentration of 96% by mass at 30 ° C. to 0.05 g / dL, 0.1 g / dL, and 0.2 g, respectively. / DL, dissolved at a concentration of 0.4 g / dL, and the reduced viscosity of the semi-aromatic polyamide was determined. And the value which extrapolated the density
- Thermal Decomposition Temperature of Thermal Stabilizer From 30 ° C. to 500 ° C. under a nitrogen atmosphere of 200 ml / min using a differential thermothermal gravimetric simultaneous measurement device (STG Nanotechnology, “TG / DTA 7000”). The temperature was raised at 20 ° C / min. The temperature at which the mass decreased by 5 mass% with respect to the mass before the temperature elevation was defined as the thermal decomposition temperature.
- Thickness unevenness of stretched film With respect to a range of 20 cm ⁇ 20 cm at the center in the width direction of the stretched film, 30 points of thickness were randomly measured in an environment of a temperature of 20 ° C. and a humidity of 65%. The maximum value of the measured values was Lmax, the minimum value was Lmin, and the average value was La. And the value represented by the following formula
- FIG. 2 shows a schematic diagram thereof. Measure the major axis and minor axis of 20 domains D randomly per TEM photograph, measure the major axis and minor axis of a total of 120 domains using 6 TEM photographs, and calculate their average values respectively. , “Average major axis” and “average minor axis”.
- thermoplastic elastomer in stretched film JEM-1230 transmission electron microscope manufactured by JEOL Ltd. was used for 5 sections in the longitudinal section of the portion taken at random from the center in the width direction of the stretched film.
- TEM observation was performed (acceleration voltage 100 kV, direct magnification 20000 times).
- a 100 nm-thick slice cut out with a frozen ultramicrotome was used.
- the number of domains N existing in 5 ⁇ m in the thickness direction of the film was measured at any two locations separated by 5 ⁇ m or more in the longitudinal direction of the film, and the domain interval was obtained by the following formula. .
- Domain interval 5 / N ( ⁇ m)
- the domain spacing is about 0.38 ⁇ m.
- Two domain intervals were measured for each TEM photograph, and a total of 10 domain intervals were measured using five TEM photographs, and the average value thereof was defined as “average domain interval”.
- Raw material ⁇ Raw material monomer> (1) Linear aliphatic diamine 1,9-nonanediamine (hereinafter sometimes abbreviated as “NMDA”) (2) Branched aliphatic diamine 2-methyl-1,8-octanediamine (hereinafter sometimes abbreviated as “MODA”) (3) Dicarboxylic acid terephthalic acid (hereinafter sometimes abbreviated as “TPA”) (4) End-capping agent Benzoic acid (hereinafter sometimes abbreviated as “BA”) ⁇ Catalyst> Phosphorous acid (hereinafter sometimes abbreviated as “PA”) ⁇ Heat stabilizer> Sumilyzer GA-80: manufactured by Sumitomo Chemical Co., Ltd., thermal decomposition temperature: 392 ° C [Semi-aromatic polyamide (A)] (1) Semi-aromatic polyamide A1 1343 g of NMDA, 237 g of MODA, 1627 g of TPA (average particle size: 80 ⁇ m)
- the mixture was stirred at 80 ° C. for 0.5 hour and 28 revolutions per minute, and then heated to 230 ° C. Then, it heated at 230 degreeC for 3 hours. Thereafter, the mixture was cooled and the reaction product was taken out. After the reaction product was pulverized, the polymer was obtained by solid phase polymerization by heating at 220 ° C. for 5 hours under a nitrogen stream in a dryer.
- Table 1 shows the copolymerization ratios and characteristic values of the semi-aromatic polyamides A1 to A3.
- Tuffmer MH7020 manufactured by Mitsui Chemicals, maleic anhydride-modified polyolefin, melt viscosity 1.5 g / 10 min, Tg ⁇ 65 ° C.
- Tuffmer MA8510 manufactured by Mitsui Chemicals, maleic anhydride-modified polyolefin, melt viscosity 5.0 g / 10 min, Tg -55 ° C.
- Tuftec M1913 manufactured by Asahi Kasei Co., Ltd., maleic anhydride modified polystyrene-hydrogenated polybutadiene copolymer, melt viscosity 5 g / 10 min, Tg ⁇ 20 ° C. and 105 ° C.
- Tuffmer A1050S manufactured by Mitsui Chemicals, unacid-modified polyolefin, melt viscosity 2.2 g / 10 min, Tg -65 ° C.
- thermoplastic elastomer-containing masterbatch M1 75% by mass of semi-aromatic polyamide A1, 25% by mass of Tuffmer MH7020, which is a thermoplastic elastomer, and Sumilizer GA-80, which is a thermal stabilizer, for a total of 100 parts by mass of semi-aromatic polyamide and thermoplastic elastomer. 4 parts by mass were dry blended. And this was thrown into the twin-screw extruder whose screw diameter is 26 mm when the cylinder temperature was heated to 310 degreeC, it melt-kneaded, and was extruded in the shape of a strand. Then, it cooled and cut
- Table 2 shows the mixing ratio of the raw materials in the thermoplastic elastomer-containing master batches M1 to M6.
- Unstretched film N1 84 parts by mass of semi-aromatic polyamide A1 and 16 parts by mass of thermoplastic elastomer-containing master batch M1 were charged into a single screw extruder having a screw diameter of 50 mm when heated at a cylinder temperature of 320 ° C. and melted. As a result, a molten polymer was obtained. The molten polymer was filtered using a metal fiber sintered filter (manufactured by Nippon Seisen Co., Ltd., “NF-13”, absolute particle size: 60 ⁇ m). Thereafter, the molten polymer was extruded into a film form from a T-die set at 320 ° C. to obtain a film-form melt. The melt was brought into close contact with a cooling roll set at 50 ° C. by an electrostatic application method and cooled to obtain a substantially non-oriented unstretched film (average thickness: 230 ⁇ m).
- Table 3 shows the blending ratio of the semi-aromatic polyamide and the thermoplastic elastomer-containing masterbatch used for the unstretched film N1 and the resin composition of the unstretched film N1.
- Example 1 Biaxial stretching was performed with a flat simultaneous biaxial stretching machine while holding both ends of the unstretched film N1 with clips.
- the stretching conditions were as follows: the temperature of the preheating portion was 125 ° C., the temperature of the stretching portion was 130 ° C., the MD stretching strain rate was 2400% / min, the TD stretching strain rate was 2760% / min, and the MD stretching ratio was 3.0. The draw ratio of TD was 3.3 times.
- heat setting was performed at 270 ° C. in the same tenter of the biaxial stretching machine, and 5% relaxation treatment was performed in the width direction of the film to obtain a biaxially stretched film having an average thickness of 25 ⁇ m.
- Example 2 to 12 Comparative Examples 1 to 3 As shown in Table 4, the stretching ratio, stretching temperature, and relaxation ratio were changed as compared with Example 1. Other than that was carried out similarly to Example 1, and manufactured the semi-aromatic polyamide film.
- Example 13 The unstretched film N1 was biaxially stretched by a flat sequential axial stretching machine.
- the unstretched film was heated to 125 ° C. by roll heating, infrared heating, or the like, and stretched 2.5 times at a stretching strain rate of 4000% / min in the longitudinal direction to obtain a longitudinally stretched film.
- both ends in the width direction of the film were continuously held by clips of a transverse stretching machine, and transverse stretching was performed.
- the temperature of the preheating portion of the transverse stretching was 130 ° C.
- the temperature of the stretching portion was 145 ° C.
- the stretching strain rate was 2000% / min
- the stretching ratio of TD was 3.0 times.
- heat setting was performed at 270 ° C. in the same tenter of the transverse stretching machine, and 5% relaxation treatment was performed in the width direction of the film to obtain a biaxially stretched film having an average thickness of 25 ⁇ m.
- Table 4 shows the unstretched films used, stretch conditions, and evaluation results of stretched films for Examples 1 to 13 and Comparative Examples 1 to 3.
- the semi-aromatic polyamide films of Examples 1 to 13 had high heat resistance, excellent deformation resistance such as bending resistance and stretchability, and small thickness unevenness.
- the semi-aromatic polyamide films of Example 2, Example 5, and Example 7 have a stretching ratio higher than that of the semi-aromatic polyamide films of Examples 3 and 4, Example 6, and Example 8 having the same resin composition, respectively. It was low. Therefore, the average anisotropic index of the domains of the thermoplastic elastomer is small, the average domain interval is slightly large, and the bending resistance is slightly deteriorated.
- the semi-aromatic polyamide films of Examples 7 and 8 were the minimum limit value within the range defined by the present invention for the thermoplastic elastomer content. Therefore, only the content of the thermoplastic elastomer used is different from Examples 7 and 8, respectively, and the average domain interval is higher than those of Examples 2 and 4 in which the content exceeds the minimum limit value specified in the present invention. Slightly large and slightly improved in flex resistance, particularly flex resistance after heat treatment.
- the semi-aromatic polyamide film of Example 11 had the maximum limit value within the range defined by the present invention for the thermoplastic elastomer content. Therefore, only the content of the thermoplastic elastomer used is different from that of Example 11, and the stretchability is lower than those of Examples 4 and 10 in which the content is below the maximum limit value of the range defined in the present invention, and the thickness of the film. The unevenness was slightly large and the tensile strength elongation was slightly low.
- the semi-aromatic polyamide film of Example 12 had a small intrinsic viscosity of the semi-aromatic polyamide used. Therefore, the stretchability was lower, the film thickness unevenness was slightly larger, and the effect of improving the bending resistance after heat treatment was slightly smaller than in Example 4 in which only the intrinsic viscosity of the semi-aromatic polyamide used was different.
- thermoplastic elastomer used in the semi-aromatic polyamide film of Comparative Example 1, the content of the thermoplastic elastomer used was lower than the range specified in the present invention. Therefore, it was inferior in bending resistance, especially bending resistance after heat treatment.
- thermoplastic elastomer used did not have a functional group. Therefore, the stretchability was low and the film thickness unevenness was remarkably large. Further, the average minor axis and the average domain interval were large, and the bending resistance was poor.
- thermoplastic elastomer used in the semi-aromatic polyamide film of Comparative Example 3 was larger than the range specified in the present invention. Therefore, the stretchability is inferior, and a stretched film having a surface magnification of 10 times cannot be obtained.
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Abstract
Description
半芳香族ポリアミド、熱可塑性エラストマーおよび半芳香族ポリアミドフィルムの物性測定は、以下の方法によりおこなった。
濃度が96質量%である濃硫酸中に、30℃にて、半芳香族ポリアミドを、それぞれ、0.05g/dL、0.1g/dL、0.2g/dL、0.4g/dLの濃度となるように溶解させて、半芳香族ポリアミドの還元粘度を求めた。そして、各々の還元粘度の値を用い、濃度を0g/dLに外挿した値を極限粘度とした。
半芳香族ポリアミドまたは熱可塑性エラストマー10mgを、示差走査型熱量計(パーキンエルマー社製、「DSC-7」)を用いて、窒素雰囲気下で20℃から350℃まで10℃/分で昇温し(1st Scan)、350℃にて5分間保持した。その後、100℃/分で20℃まで降温し、20℃にて5分間保持後、350℃まで20℃/分でさらに昇温した(2nd Scan)。そして、2nd Scanで観測される結晶融解ピークのピークトップ温度を融点とし、ガラス転移に由来する2つの折曲点の温度の中間点をガラス転移温度とした。
示差熱熱重量同時測定装置(SIIナノテクノロジー社製、「TG/DTA 7000」)を用いて、200ml/分の窒素雰囲気下で、30℃から500℃まで20℃/分で昇温した。昇温前の質量に対して5質量%減少する温度を熱分解温度とした。
未延伸フィルムを各実施例ごとの所定の方法、倍率で延伸した際の状況を、以下の基準に従い評価した。
厚み計(HEIDENHAIN社製、「MT12B」)を用い、温度20℃、湿度65%の環境下、フィルムの厚みを、ロール状のフィルムのTDの中心の位置において、MD1m毎に10回測定した。そして得られた10点の測定値から、その平均厚みを求めた。
延伸フィルムの幅方向の中心部における20cm×20cmの範囲について、ランダムに30点の厚みを、温度20℃、湿度65%の環境下で測定した。計測値の最大値をLmax、最小値をLmin、平均値をLaとした。そして、以下の式で表される値を「厚みムラR」として、下記基準に従い評価した。
優秀:R≦10
良好:10<R≦15
普通:15<R≦20
不良:20<R
(7)延伸フィルム中の熱可塑性エラストマーの分散状態
延伸フィルムの幅方向の中心部からランダムに採取した部分における長手方向断面と幅方向断面の6箇所について(長手方向断面、幅方向断面についてそれぞれ3箇所)、日本電子社製JEM-1230透過電子顕微鏡を用いて、TEM観察をおこなった(加速電圧100kV、直接倍率20000倍)。試料としては凍結ウルトラミクロトームで切り出した厚さ100nmの切片を用いた。
得られたTEM写真を用いて、フィルムの長手方向または幅方向におけるドメインの最大径と、フィルムの厚み方向におけるドメインの最大径とを測定し、それぞれを「長径」、「短径」とした。図2にその模式図を示す。TEM写真1枚につきランダムに20個のドメインDの長径と短径を測定し、6枚のTEM写真を用いて合計120個のドメインの長径と短径を測定し、それらの平均値を、それぞれ、「平均長径」、「平均短径」とした。
平均長径/平均短径の値を「平均異方指数」とした。
延伸フィルムの幅方向の中心部からランダムに採取した部分の長手方向断面の5箇所について、日本電子社製JEM-1230透過電子顕微鏡を用いて、TEM観察をおこなった(加速電圧100kV、直接倍率20000倍)。観察試料としては、凍結ウルトラミクロトームで切り出した厚さ100nmの切片を用いた。
図1を参照して説明する。例えば、図1の位置Aにおいては、ドメインDが13個あるため、ドメイン間隔は約0.38μmとなる。TEM写真1枚につき2箇所のドメイン間隔を測定し、5枚のTEM写真を用いて合計10箇所のドメイン間隔を測定し、それらの平均値を、「平均ドメイン間隔」とした。
JIS K7127に従って、温度20℃、湿度65%の環境下で測定した。サンプルの大きさは10mm×150mm、チャック間の初期距離は100mm、引張速度は500mm/分とした。
理学工業社製ゲルボテスターを用いて、熱処理前後の延伸フィルムについて、繰り返し屈曲後のピンホール数により耐屈曲性を評価した。試料としては、フィルムにおける幅方向の中心部からMD300mm×TD200mmに切り出した延伸フィルムを使用し、直径3.5インチ(89mm)の円筒状に把持し、円筒の長さ方向に沿った初期把持間隔を7インチ(178mm)とし、最大屈曲時の把持間隔を1インチ(25.4mm)として、20℃×65%RH環境下で、100回屈曲を与えた後、および500回屈曲を与えた後のピンホール数(n=3の平均値)を計測した。フィルムの熱処理は、250℃に調整した熱風乾燥機中にて、金枠に固定した状態で5分間加熱後、放冷した。
良好:100回屈曲後のピンホール数が1個未満、かつ、500回屈曲後のピンホール数が共に1~2個
普通:100回屈曲後のピンホール数が1個未満、かつ、500回屈曲後のピンホール数が共に2~5個
不良:100回屈曲後のピンホール数が1個以上、もしくは、500回屈曲後のピンホール数が共に5個以上もしくはフィルム破断
2.原料
<原料モノマー>
(1)直鎖状脂肪族ジアミン
1,9-ノナンジアミン(以下、「NMDA」と略称することがある)
(2)分岐鎖状脂肪族ジアミン
2-メチル-1,8-オクタンジアミン(以下、「MODA」と略称することがある)
(3)ジカルボン酸
テレフタル酸(以下、「TPA」と略称することがある)
(4)末端封止剤
安息香酸(以下、「BA」と略称することがある)
<触媒>
亜リン酸(以下、「PA」と略称することがある)
<熱安定剤>
スミライザーGA-80:住友化学社製、熱分解温度:392℃
[半芳香族ポリアミド(A)]
(1)半芳香族ポリアミドA1
1343gのNMDA、237gのMODA、1627gのTPA(平均粒径:80μm)(NMDA:MODA:TPA=85:15:99、モル比)、48.2gのBA(ジカルボン成分とジアミン成分の総モル数に対して4.0モル%)、3.2gのPA(ジカルボン成分とジアミン成分の合計量に対して0.1質量%)、1100gの水を反応装置に入れ、窒素置換した。さらに、80℃で0.5時間、毎分28回転で撹拌した後、230℃に昇温した。その後、230℃で3時間加熱した。その後冷却し、反応物を取り出した。該反応物を粉砕した後、乾燥機中において、窒素気流下、220℃で5時間加熱することで固相重合して、ポリマーを得た。
表1に示すように、半芳香族ポリアミドA1と比べて、原料モノマーの組成と配合量を変更した。それ以外は半芳香族ポリアミドA1の場合と同様の操作をおこなって、「半芳香族ポリアミドA2」、「半芳香族ポリアミドA3」を製造した。
(1)タフマーMH7020:三井化学社製、無水マレイン酸変性ポリオレフィン、溶融粘度1.5g/10分、Tg -65℃
(2)タフマーMA8510:三井化学社製、無水マレイン酸変性ポリオレフィン、溶融粘度5.0g/10分、Tg -55℃
(3)タフテックM1913:旭化成社製、無水マレイン酸変性ポリスチレン-水添ポリブタジエン共重合体、溶融粘度5g/10分、Tg -20℃および105℃
(4)タフマーA1050S:三井化学社製、未酸変性ポリオレフィン、溶融粘度2.2g/10分、Tg -65℃
[熱可塑性エラストマー含有マスターバッチ]
(1)熱可塑性エラストマー含有マスターバッチM1
半芳香族ポリアミドA1を75質量%、熱可塑性エラストマーであるタフマーMH7020を25質量%、さらに半芳香族ポリアミドと熱可塑性エラストマーの合計100質量部に対して熱安定剤であるスミライザーGA-80 0.4質量部をドライブレンドした。そして、これを、シリンダー温度を310℃に加熱したところの、スクリュー径が26mmである二軸押出機に投入し、溶融混練して、ストランド状に押出した。その後、冷却、切断して、ペレット状の熱可塑性エラストマー含有マスターバッチM1を製造した。
表2に示すように、熱可塑性エラストマー含有マスターバッチM1に比べ、半芳香族ポリアミドと熱可塑性エラストマーの種類と配合比率を変更した。それ以外は熱可塑性エラストマー含有マスターバッチM1を製造する際と同様の操作をおこなって、熱可塑性エラストマー含有マスターバッチM2~M6を製造した。
(1)未延伸フィルムN1
84質量部の半芳香族ポリアミドA1、および16質量部の熱可塑性エラストマー含有マスターバッチM1を、シリンダー温度を320℃に加熱したところの、スクリュー径が50mmである単軸押出機に投入し溶融して、溶融ポリマーを得た。該溶融ポリマーを金属繊維焼結フィルター(日本精線社製、「NF-13」、絶対粒径:60μm)を用いて濾過した。その後、320℃にしたTダイより溶融ポリマーをフィルム状に押出し、フィルム状の溶融物とした。該溶融物を50℃に設定した冷却ロール上に静電印加法により密着させて冷却し、実質的に無配向の未延伸フィルム(平均厚み:230μm)を得た。
表3に示すように、未延伸フィルムN1に比べて、半芳香族ポリアミドと熱可塑性エラストマー含有マスターバッチとの種類と配合比率とを変更した。それ以外は未延伸フィルムN1を製造した際と同様の操作をおこなって、未延伸フィルムN2~N11を製造した。なお、未延伸フィルムN4については、冷却ロールの速度を調整して、平均厚みが110μmと180μmのフィルムも同時に採取した。未延伸フィルムN3、N6については、冷却ロールの速度を調整して、平均厚みが110μmのフィルムも同時に採取した。
未延伸フィルムN1の両端をクリップで把持しながら、フラット式同時二軸延伸機にて、二軸延伸をおこなった。延伸条件は、予熱部の温度が125℃、延伸部の温度が130℃、MDの延伸歪み速度が2400%/分、TDの延伸歪み速度が2760%/分、MDの延伸倍率が3.0倍、TDの延伸倍率が3.3倍であった。延伸後連続して、二軸延伸機の同じテンター内で270℃にて熱固定をおこない、フィルムの幅方向に5%のリラックス処理を施し、平均厚み25μmの二軸延伸フィルムを得た。
表4に示したように、実施例1に比べて、延伸倍率、延伸温度、リラックスの倍率を変更した。それ以外は実施例1と同様にして、半芳香族ポリアミドフィルムを製造した。
未延伸フィルムN1について、フラット式逐次軸延伸機によって、二軸延伸をおこなった。まず、未延伸フィルムをロール加熱や赤外線加熱等によって125℃に加熱し、縦方向に延伸歪み速度4000%/分で2.5倍延伸して、縦延伸フィルムを得た。続いて連続的に、フィルムの幅方向の両端を横延伸機のクリップに把持させ、横延伸をおこなった。横延伸の予熱部の温度は130℃、延伸部の温度は145℃、延伸歪み速度は2000%/分、TDの延伸倍率が3.0倍であった。そして、横延伸機の同じテンター内で、270℃で熱固定をおこない、フィルムの幅方向に5%のリラックス処理を施し、平均厚み25μmの二軸延伸フィルムを得た。
Claims (3)
- テレフタル酸を主成分とするジカルボン酸を含むとともに、炭素数が9である脂肪族ジアミンを主成分とするジアミンを含む半芳香族ポリアミド(A)98~90質量%と、
官能基を有する熱可塑性エラストマー(B)2~10質量%とを含有し、
延伸されていることを特徴とする半芳香族ポリアミドフィルム。 - 官能基を有する熱可塑性エラストマー(B)が、ジカルボン酸および/またはその誘導体で変性されたオレフィン系の熱可塑性エラストマーであることを特徴とする請求項1記載の半芳香族ポリアミドフィルム。
- 熱可塑性エラストマー(B)のドメインの平均短径が0.01~1.0μmであり、かつフィルムの長手方向の断面における熱可塑性エラストマー(B)の平均ドメイン間隔が0.1~1.5μmである状態で、熱可塑性エラストマー(B)がフィルム中に分散していることを特徴とする請求項1または2記載の半芳香族ポリアミドフィルム。
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JP2016121349A (ja) * | 2014-12-25 | 2016-07-07 | ユニチカ株式会社 | 半芳香族ポリアミドフィルム |
JP2017002114A (ja) * | 2015-06-04 | 2017-01-05 | グンゼ株式会社 | ポリアミド系フィルム |
JP2018104659A (ja) * | 2016-12-28 | 2018-07-05 | 富士ゼロックス株式会社 | 樹脂組成物、及び樹脂成形体 |
JP2019099626A (ja) * | 2017-11-30 | 2019-06-24 | ユニチカ株式会社 | 熱可塑性樹脂フィルムおよび積層体 |
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US9890247B2 (en) * | 2010-04-29 | 2018-02-13 | Dsm Ip Assets B.V. | Semi-aromatic polyamide |
WO2019054426A1 (ja) * | 2017-09-15 | 2019-03-21 | ユニチカ株式会社 | 積層体 |
CN107663372B (zh) * | 2017-09-19 | 2019-11-19 | 江门市德众泰工程塑胶科技有限公司 | 一种用于环保电镀的聚酰胺复合物及其制备方法 |
WO2020085280A1 (ja) * | 2018-10-22 | 2020-04-30 | クラレファスニング株式会社 | 耐熱性に優れた雄型成形面ファスナー、該雄型成形面ファスナーの製造方法、及び該雄型成形面ファスナーを用いた自動車用内装材の固定方法 |
KR102507142B1 (ko) * | 2020-09-29 | 2023-03-07 | 에스케이마이크로웍스 주식회사 | 폴리아마이드계 필름, 이의 제조방법, 및 이를 포함하는 커버 윈도우 및 디스플레이 장치 |
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KR20150068352A (ko) | 2015-06-19 |
US9580565B2 (en) | 2017-02-28 |
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TWI595031B (zh) | 2017-08-11 |
US20150252158A1 (en) | 2015-09-10 |
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JPWO2014057828A1 (ja) | 2016-09-05 |
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HK1209447A1 (en) | 2016-04-01 |
JP5959662B2 (ja) | 2016-08-02 |
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CN104662094B (zh) | 2016-09-28 |
KR101867495B1 (ko) | 2018-06-14 |
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