JP2007063484A - New polypropylene resin composition, sheet or film-formed article by using the same and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polypropylene resin composition excellent in forming processability of its sheet or film, transparency, heat resistance and odor characteristics and capable of giving a sheet or film-formed article having small thickness unevenness and small surface defects, and also the sheet or film-formed article and stretched film by using the resin composition and a method for producing them. <P>SOLUTION: This polypropylene resin composition is obtained by blending 0.005-5 pts.wt. amide-based compound expressed by general formula (1) [wherein, R<SP>1</SP>is a residue of eliminating all of carboxyl groups from 1,2,3-propane tricarboxylic acid or 1,2,3,4-butane tetracarboxylic acid; kR<SP>2</SP>are each the same or different and are each H or a 1-10C straight chain or branched chain-formed alkyl; and (k) is 3 or 4 integer] based on 100 pts.wt. polypropylene resin, and as necessary, a fatty acid metal salt is also blended. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a polypropylene resin composition for sheet or film molding, a sheet or film molded body using the composition, and a method for producing the same. Specifically, a polypropylene resin composition capable of giving a sheet or film molded article having excellent sheet or film molding processability, transparency, heat resistance, odor / migration characteristics, and surface smoothness, and the composition were used. The present invention relates to a sheet or film molded body and a method for producing the molded body.

  Polypropylene resin is used as one of the most widely used plastic materials in terms of physical properties, moldability, price, etc., among various thermoplastic general-purpose resins. For example, packaging materials, general industrial containers, cosmetic containers, food containers, stationery, toys, bottles, medical fields (containers such as injection solutions, syringes, etc.), automobile interior and exterior (companies, bumpers, etc.), etc. It is done.

In the sheet / film field, applications mainly include packaging materials (food, cosmetics, pharmaceuticals, etc.), stationery, and protective sheets. In this field, transparency is mainly required, and characteristics such as heat resistance, impact resistance, rigidity, oil resistance, gas barrier properties, whitening resistance, and blocking resistance are required depending on the purpose (for example, patents) Reference 1 to 3).
In particular, in food use, pharmaceutical use, and cosmetic use, in addition to transparency, heat resistance that does not cause alteration in the heat sterilization process, etc., components such as additives in propylene resin are transferred to the contents (packaging) Low migration, or low odor of the sheet / film molded body itself is required.

  As a method for modifying a polypropylene resin, a method for improving the polymer itself and a method for modifying with additives such as an antioxidant, a nucleating agent (crystallization accelerator) and a stabilizer are known.

  Examples of the method for modifying the polypropylene resin itself include random or block copolymerization, stericity control using a metallocene catalyst, and polymer alloy. In particular, as a method for improving the transparency, there are random copolymerization and stericity control by a metallocene catalyst, and the transparency of the polypropylene resin is improved. However, there was a tendency for heat resistance to decrease at the same time.

As a method for modifying a polypropylene resin with an additive, the additive used depends on the purpose. For example, antioxidants represented by phenol antioxidants and phosphorus antioxidants, dibenzylidene sorbitols and aromatics are used. Various additives such as nucleating agents typified by group phosphate metal salts, lubricants typified by paraffin and higher fatty acids, antistatic agents, and surfactants are used.
As described above, in the sheet / film field, improving the transparency of polypropylene resin is one of the important modification items. As this reforming method, a nucleating agent is frequently used. The nucleating agent contributes to the improvement of heat resistance in addition to the improvement of transparency (see, for example, Patent Document 4). However, the nucleating agent represented by the above may be thermally decomposed to generate a decomposition component depending on molding processing conditions. Thereby, the odor characteristic and low migration property of a sheet | seat or a film molded object may be impaired, and the use may be restrict | limited depending on the use.

JP-A-7-186349 JP-A-6-254946 JP-A-8-283486 Japanese Patent Laid-Open No. 7-242776

  The object of the present invention is to improve the transparency and odor / migration characteristics at the same time, and to provide a sheet or film molded article having excellent heat resistance and surface smoothness, and for sheet or film molding excellent in molding processability. The object is to provide a polypropylene resin composition, to provide a sheet or film molded body using the resin composition, and to provide a method for producing the molded body.

  As a result of intensive studies in view of the present situation, the present inventors have obtained a polypropylene resin composition containing a specific amount of an amide compound having a specific structure, which is excellent in sheet or film moldability and obtained by molding it. The sheet or film molded body was found to be excellent in transparency, odor and migration characteristics, and further excellent in heat resistance and surface smoothness, and further investigations were made based on such knowledge to complete the present invention.

  That is, the present invention provides the following items of the invention.

［式中、Ｒ^１は、１，２，３−プロパントリカルボン酸又は１，２，３，４−ブタンテトラカルボン酸から全てのカルボキシル基を除いて得られる残基を表す。ｋ個のＲ^２は、互いに同一又は異なって、それぞれ水素原子又は炭素数１〜１０の直鎖状若しくは分岐鎖状のアルキル基を表す。ｋは、３又は４の整数を表す。］
で表される少なくとも一種のアミド系化合物（Ｂ）０．００５〜５重量部を含有することを特徴とするシート又はフィルム成形用ポリプロピレン樹脂組成物。 (Item 1) With respect to 100 parts by weight of the polypropylene resin (A),
General formula (1)

[Wherein, R ¹ represents a residue obtained by removing all carboxyl groups from 1,2,3-propanetricarboxylic acid or 1,2,3,4-butanetetracarboxylic acid. k R ^{2 s} are the same as or different from each other and each represent a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms. k represents an integer of 3 or 4. ]
A polypropylene resin composition for molding a sheet or film, comprising 0.005 to 5 parts by weight of at least one amide compound (B) represented by the formula:

(Item 2) The polypropylene resin composition for sheet or film molding according to item 1, wherein the polypropylene resin (A) has a melt flow rate at 230 ° C of 0.1 to 30 g / 10 min.

(Item 3) The sheet or film-forming polypropylene resin composition according to Item 1 or 2, wherein the polypropylene resin (A) is a homopropylene polymer.

(Item 4) The sheet or film-forming polypropylene resin composition according to item 1 or 2, wherein the polypropylene resin (A) is a copolymer of propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms. object.

(Item 5) The copolymer of propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms is a copolymer of propylene and ethylene, or a copolymer of propylene, ethylene and 1-butene. Item 5. A polypropylene resin composition for molding a sheet or film according to Item 4.

(Item 6) The content of propylene constituting the copolymer of propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms is 93.0 wt% or more and less than 100 wt% with respect to the copolymer. 6. The sheet or film-forming polypropylene resin composition according to item 4 or 5, which is

［式中、Ｒ³は分子内に１個以上の水酸基を有していてもよい炭素数８〜３２の飽和若しくは不飽和の脂肪族モノカルボン酸からカルボキシル基を除いて得られる残基を表す。ｎは１又は２の整数を表し、ｎ＝２の場合、２個のＲ³は同一又は異なっていてもよい。Ｍは１価又は２価の金属を表す。］
で表される少なくとも一種の脂肪酸金属塩（Ｃ）を含有することを特徴とする上記項１〜６のいずれかに記載のシート又はフィルム成形用ポリプロピレン樹脂組成物。 (Claim 7) Furthermore, the general formula (2)

[Wherein R ³ represents a residue obtained by removing a carboxyl group from a saturated or unsaturated aliphatic monocarboxylic acid having 8 to 32 carbon atoms which may have one or more hydroxyl groups in the molecule. . n represents an integer of 1 or 2, and when n = 2, two R ^{3 s} may be the same or different. M represents a monovalent or divalent metal. ]
7. The sheet or film-forming polypropylene resin composition according to any one of items 1 to 6, which contains at least one fatty acid metal salt (C) represented by

(Item 8) The sheet or film-forming polypropylene resin composition according to Item 7, wherein M in the general formula (2) is at least one selected from the group consisting of alkali metals, alkaline earth metals, magnesium and zinc. .

(Item 9) The aliphatic monocarboxylic acid in the general formula (2) is at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid and 12-hydroxystearic acid. Item 9. The polypropylene resin composition for molding a sheet or film according to Item 7 or Item 8.

(Item 10) The sheet or film molding according to any one of Items 7 to 9, wherein the content of the fatty acid metal salt (C) is 0.001 to 10 parts by weight with respect to 100 parts by weight of the polypropylene resin (A). Polypropylene resin composition.

(Item 11) An unstretched sheet or film molded body obtained by molding the sheet or film-forming polypropylene resin composition according to any one of Items 1 to 10.

(Item 12) The unstretched sheet or film molded product according to Item 11, wherein the thickness uniformity of the sheet or film molded product is 0.12 or less.

(Item 13) A stretched film obtained by uniaxially stretching or sequentially or simultaneously biaxially stretching the unstretched sheet or film molded body according to Item 11 or Item 12.

(Item 14) The stretched film according to Item 13, wherein the uniformity of the thickness of the stretched film is 0.12 or less.

(Item 15) In molding the sheet or film-forming polypropylene resin composition according to any one of Items 1 to 10, the polypropylene resin composition in a state where the amide compound (B) is dissolved in the molten polypropylene resin. A method for producing an unstretched sheet or film molded body, wherein

(Item 16) A uniaxially stretched film produced by uniaxially stretching the unstretched sheet or film molded product according to Item 11 or 12 at a stretching temperature of 125 to 165 ° C and a stretching ratio of 2 to 10 times. Method.

(Item 17) The unstretched sheet or film molded product according to item 11 or item 12 above is longitudinally stretched at a longitudinal stretching temperature of 125 to 165 ° C. and a longitudinal stretching ratio of 2 to 10 times, and then a transverse stretching temperature of 150 to 175. A method for producing a sequentially biaxially stretched film, wherein the film is horizontally stretched at 0 ° C. and a transverse stretch ratio of 2 to 10 times.

(Item 18) Simultaneously biaxially stretching the unstretched sheet or film molded product according to Item 11 or Item 12 at a stretching temperature of 135 to 165 ° C, a longitudinal stretching ratio of 2 to 10 times, and a transverse stretching ratio of 2 to 10 times. A method for producing a simultaneous biaxially stretched film.

  According to the present invention, by adding a specific amount of an amide compound having a specific structure to a polypropylene resin, a sheet or film molded article having excellent transparency, odor / migration characteristics, heat resistance and surface smoothness can be provided. Further, a polypropylene resin composition for molding a sheet or film having good moldability can be provided. Moreover, the sheet | seat or film molded object obtained by shape | molding this resin composition is excellent in transparency, an odor, a transfer characteristic, heat resistance, and surface smoothness.

  Hereinafter, embodiments of the present invention will be described in detail.

Polypropylene resin (A)
The polypropylene resin (A) according to the present invention is a polymer having propylene as a main structural unit. The propylene content in the polypropylene resin is usually 50% by weight or more, preferably 70% by weight or more, more preferably 93% by weight or more, and particularly 95% by weight or more. Further, the stereoregularity of the polypropylene portion may be any of isotactic, syndiotactic and atactic, but preferably isotactic or syndiotactic is recommended.
Specific examples of the polypropylene resin (A) include homopolypropylene polymers, copolymers of propylene and ethylene and / or α-olefins having 4 to 20 (preferably 4 to 10) carbon atoms. Examples of the α-olefin include 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 4-methyl-1-pentene, and 4-methyl-1-hexene. 4-dimethyl-1-pentene and the like. Among the structural units other than propylene in the copolymer, from the viewpoints of copolymerizability, availability and polymer properties, ethylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 4-methyl-1-pentene is recommended.
In the copolymer of propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms, the content of propylene constituting the copolymer is preferably 93.0% by weight or more based on the copolymer. It is preferably less than 100% by weight, particularly 95.0-99.5% by weight. In addition, examples of the copolymer include a random copolymer and a block copolymer, and a random copolymer is recommended from the viewpoint of transparency of the sheet and the film molded body.

  Preferred polypropylene resins (A) include homopolypropylene polymer, propylene-ethylene random copolymer, propylene-1-butene random copolymer, propylene-1-butene-ethylene random copolymer, propylene-ethylene block copolymer Examples thereof include a copolymer, a propylene-1-butene block copolymer, and a propylene-1-butene-ethylene block copolymer. Among these, a homopolypropylene polymer, a propylene-ethylene random copolymer, a propylene-1-butene -Especially preferred are ethylene random copolymers. These may be used alone or in appropriate combination of two or more.

  As a catalyst applied to produce such a polypropylene resin, a transition metal compound (for example, a titanium halide such as titanium trichloride, titanium tetrachloride, etc.) as well as a Ziegler-Natta type catalyst generally used is used. A catalyst system or a metallocene catalyst obtained by combining a catalyst formed on a carrier mainly composed of magnesium halide such as magnesium chloride and an alkylaluminum compound (tetraethylaluminum, diethylaluminum chloride, etc.) can also be used.

  The polypropylene resin (A) has a melt flow rate at 230 ° C. (hereinafter referred to as “MFR” in accordance with JIS K 7210 (1999)) of preferably 0.1 to 30 g / 10 minutes, more preferably 0.5. ~ 20 g / 10 min. When the MFR is less than 0.1 g / 10 min, it is difficult to form a sheet or a film. When the MFR exceeds 30 g / 10 min, it tends to be difficult to obtain film uniformity.

Amide compound (B)
The amide compound (B) according to the present invention is at least one compound represented by the above general formula (1), and is a compound having a nucleating action on a polypropylene resin.
The amide compound is prepared by amidating a predetermined aliphatic polycarboxylic acid component and a predetermined alicyclic monoamine component according to a conventionally known method (for example, JP-A-7-242610). Can do.

Examples of the aliphatic polycarboxylic acid component include 1,2,3-propanetricarboxylic acid and acid chlorides thereof, esterified products of 1,2,3-propanetricarboxylic acid and lower alcohols having 1 to 4 carbon atoms, 2,3,4-butanetetracarboxylic acid and its acid chloride, esterified product of 1,2,3,4-butanetetracarboxylic acid and a lower alcohol having 1 to 4 carbon atoms, preferably 1, 2,3-propanetricarboxylic acid, 1,2,3,4-butanetetracarboxylic acid, especially 1,2,3-propanetricarboxylic acid is recommended.
In addition, the manufacturing method of the said polycarboxylic acid and its acid chloride and esterified substance does not have limitation in particular, A conventionally well-known manufacturing method can be used.

  Examples of the alicyclic monoamine component include cyclohexylamine, cyclohexylamine substituted with a linear or branched alkyl group having 1 to 10 carbon atoms, and these may be used alone or in appropriate combination of two or more. Can be used.

  Specifically, cyclohexylamine, 2-methylcyclohexylamine, 2-ethylcyclohexylamine, 2-n-propylcyclohexylamine, 2-iso-propylcyclohexylamine, 2-n-butylcyclohexylamine, 2-iso-butylcyclohexyl Amine, 2-sec-butylcyclohexylamine, 2-tert-butylcyclohexylamine, 2-n-pentylcyclohexylamine, 2-n-hexylcyclohexylamine, 2-n-heptylcyclohexylamine, 2-n-octylamine, 2 -(2-ethylhexyl) cyclohexylamine, 2-n-nonylcyclohexylamine, 2-n-decylcyclohexylamine, 3-methylcyclohexylamine, 3-ethylcyclohexylamine, 3-n-propyl Propylcyclohexylamine, 3-iso-propylcyclohexylamine, 3-n-butylcyclohexylamine, 3-iso-butylcyclohexylamine, 3-sec-butylcyclohexylamine, 3-tert-butylcyclohexylamine, 3-n-pentyl Cyclohexylamine, 3-n-hexylcyclohexylamine, 3-n-heptylcyclohexylamine, 3-n-octylamine, 3- (2-ethylhexyl) cyclohexylamine, 3-n-nonylcyclohexylamine, 3-n-decylcyclohexyl Amine, 4-methylcyclohexylamine, 4-ethylcyclohexylamine, 4-n-propylcyclohexylamine, 4-iso-propylcyclohexylamine, 4-n-butylcyclohexylamine, 4 iso-butylcyclohexylamine, 4-sec-butylcyclohexylamine, 4-tert-butylcyclohexylamine, 4-n-pentylcyclohexylamine, 4-n-hexylcyclohexylamine, 4-n-heptylcyclohexylamine, 4-n- Examples include octylamine, 4- (2-ethylhexyl) cyclohexylamine, 4-n-nonylcyclohexylamine, 4-n-decylcyclohexylamine and the like. These may be used alone or in appropriate combination of two or more.

Among these, cyclohexylamine and cyclohexylamine substituted with a linear or branched alkyl group having 1 to 4 carbon atoms are preferable, and methylcyclohexylamine is particularly preferable. The substitution position of the alkyl group in the cyclohexylamine substituted with the alkyl group is preferably the 2-position.
Specific preferred alicyclic monoamine components include cyclohexylamine, 2-methylcyclohexylamine, 3-methylcyclohexylamine, 4-methylcyclohexylamine, 2-ethylcyclohexylamine, 2-n-propylcyclohexylamine, 2- Examples include iso-propylcyclohexylamine, 2-n-butylcyclohexylamine, 2-iso-butylcyclohexylamine, 2-sec-butylcyclohexylamine, 2-tert-butylcyclohexylamine, particularly cyclohexylamine and 2-methylcyclohexylamine. Is recommended. These may be used alone or in appropriate combination of two or more.

  The cyclohexylamine substituted with the alkyl group may be any of a cis isomer, a trans isomer, and a mixture of these stereoisomers, and a preferred cis isomer: trans isomer ratio is 50:50 to 0: 100. In particular, 35:65 to 0: 100 is recommended.

<Preferred amide compound (B)>
Among the amide compounds (B), R ² in the general formula (1) is preferably a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms because of its high nucleating action. Some amide compounds are recommended.

  Specific examples include 1,2,3-propanetricarboxylic acid tricyclohexylamide, 1,2,3-propanetricarboxylic acid tri (2-methylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (3-methyl Cyclohexylamide), 1,2,3-propanetricarboxylic acid tri (4-methylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (2-ethylcyclohexylamide) 1,2,3-propanetricarboxylic acid tri ( 3-ethylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (4-ethylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (2-n-propylcyclohexylamide), 1,2,3 -Propanetricarboxylic acid tri (3-n-propylcyclohexyla ), 1,2,3-propanetricarboxylic acid tri (4-n-propylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (2-iso-propylcyclohexylamide), 1,2,3-propane Tricarboxylic acid tri (3-iso-propylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (4-iso-propylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (2-n-butylcyclohexyl) Amide), 1,2,3-propanetricarboxylic acid tri (3-n-butylcyclohexylamide) 1,2,3-propanetricarboxylic acid tri (4-n-butylcyclohexylamide), 1,2,3-propanetricarboxylic acid Acid tri (2-iso-butylcyclohexylamide), 1,2,3- Propane tricarboxylic acid tri (3-iso-butylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (4-iso-butylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (2-sec-butyl) Cyclohexylamide), 1,2,3-propanetricarboxylic acid tri (3-sec-butylcyclohexylamide) 1,2,3-propanetricarboxylic acid tri (4-sec-butylcyclohexylamide), 1,2,3-propane Tricarboxylic acid tri (2-tert-butylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (3-tert-butylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (4-tert-butylcyclohexyl) Amide),

1,2,3,4-butanetetracarboxylic acid tetracyclohexylamide, 1,2,3,4-butanetetracarboxylic acid tetra (2-methylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (3-methylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (4-methylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (2-ethylcyclohexylamide) 1 , 2,3,4-Butanetetracarboxylic acid tetra (3-ethylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (4-ethylcyclohexylamide), 1,2,3,4-butane Tetracarboxylic acid tetra (2-n-propylcyclohexylamide), 1,2,3,4-butanetetracarboxylic Tetra (3-n-propylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (4-n-propylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (2- iso-propylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (3-iso-propylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (4-iso-propylcyclohexyl) Amide), 1,2,3,4-butanetetracarboxylic acid tetra (2-n-butylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (3-n-butylcyclohexylamide) 1, 2,3,4-butanetetracarboxylic acid tetra (4-n-butylcyclohexylamide), 1,2,3 4-Butanetetracarboxylic acid tetra (2-iso-butylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (3-iso-butylcyclohexylamide) 1,2,3,4-butanetetracarboxylic Acid tetra (4-iso-butylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (2-sec-butylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (3 -Sec-butylcyclohexylamide) 1,2,3,4-butanetetracarboxylic acid tetra (4-sec-butylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (2-tert-butylcyclohexyl) Amide), 1,2,3,4-butanetetracarboxylic acid tetra (3-tert-butyl) (Lucyclohexylamide) 1,2,3,4-butanetetracarboxylic acid tetra (4-tert-butylcyclohexylamide) and the like. These may be used alone or in appropriate combination of two or more.

Among these amide compounds, an amide compound in which R ² in the general formula (1) is a hydrogen atom or a methyl group is more preferable.
Specifically, 1,2,3-propanetricarboxylic acid tricyclohexylamide, 1,2,3-propanetricarboxylic acid tri (2-methylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (3-methyl) Cyclohexylamide), 1,2,3-propanetricarboxylic acid tri (4-methylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetracyclohexylamide, 1,2,3,4-butanetetracarboxylic acid Tetra (2-methylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (3-methylcyclohexylamide), 1,2,3,4-butanetetracarboxylic acid tetra (4-methylcyclohexylamide) Etc. These may be used alone or in appropriate combination of two or more.

Among them, an amide compound in which R ¹ in the general formula (1) is a residue obtained by removing all carboxyl groups from 1,2,3-propanetricarboxylic acid is a viewpoint of solubility in molten polypropylene resin. Are particularly preferred.
Specifically, 1,2,3-propanetricarboxylic acid tricyclohexylamide, 1,2,3-propanetricarboxylic acid tri (2-methylcyclohexylamide), 1,2,3-propanetricarboxylic acid tri (3-methylcyclohexyl) Amide), 1,2,3-propanetricarboxylic acid tri (4-methylcyclohexylamide) and the like. These may be used alone or in appropriate combination of two or more.

  The crystal system of the amide compound (B) according to the present invention is not particularly limited as long as the effects of the present invention can be obtained, and any crystal system such as hexagonal crystal, monoclinic crystal, cubic crystal and the like can be used. These crystals are also known or can be produced according to known methods.

  The amide compound (B) according to the present invention may contain some impurities. The purity of the amide compound is recommended to be 90% by weight or more, preferably 95% by weight or more, particularly 97% by weight or more. Examples of impurities include monoamide dicarboxylic acid or ester derived from a reaction intermediate or unreacted substance, diamide monocarboxylic acid or ester thereof, and a compound having an imide skeleton such as an amide-imide structure or a bisimide structure.

  The particle size of the amide compound (B) according to the present invention is not particularly limited as long as the effects of the present invention are obtained, but from the viewpoint of solubility (dissolution time or dissolution rate) in the molten polypropylene resin, the particle size is as much as possible. A thing with a small diameter is preferable. Specifically, it is usually recommended that the maximum particle size obtained by measurement by a laser diffraction light scattering method is 200 μm or less, preferably 100 μm or less, more preferably 50 μm, particularly preferably 10 μm or less.

  Examples of the method for preparing the maximum particle size of the amide compound within the recommended range include a method of finely pulverizing using a conventional apparatus known in this field and a method of further classifying the finely pulverized product. Specific examples include a method using a fluidized bed type counter jet mill 100AFG (device name, manufactured by Hosokawa Micron Corporation), a supersonic jet mill PJM-200 (device name, manufactured by Nippon Pneumatic Co., Ltd.), and the like.

  In the polypropylene resin composition for molding a sheet or film of the present invention, the content of the amide compound (B) is 0.005 to 5 parts by weight, preferably 0 with respect to 100 parts by weight of the polypropylene resin (A). 0.02 to 2.5 parts by mass. When the amount is less than 0.005 parts by weight, it is difficult to obtain the effects of molding processability and transparency. Moreover, even if it exceeds 5 weight part, the effect of this invention corresponding to the content is difficult to be acquired.

Fatty acid metal salt (C)
The fatty acid metal salt (C) according to the present invention is at least one kind represented by the general formula (2), and may have 8 to 32 carbon atoms (preferably having one or more hydroxyl groups in the molecule). And a fatty acid metal salt comprising a saturated or unsaturated aliphatic monocarboxylic acid having 10 to 22 carbon atoms and a monovalent or divalent metal.
When the fatty acid metal salt is present together with the amide compound (B) in the polypropylene resin, the transparency or surface smoothness of the sheet or film molded product tends to be further improved.

  Specific examples of the aliphatic monocarboxylic acid in the general formula (2) include caprylic acid, 2-ethylhexanoic acid, pelargonic acid, capric acid, neodecanoic acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, pentadecane. Acid, palmitic acid, margaric acid, stearic acid, nonadecanoic acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, montanic acid, mellicic acid, succinic acid, lindelic acid, tuzuic acid, palmitoleic acid, petraseric acid, oleic acid , Elaidic acid, vaccenic acid, linoleic acid, linoleic acid, γ-linolenic acid, linolenic acid, ricinoleic acid, 12-hydroxystearic acid, naphthenic acid, abietic acid and the like. Preferably, at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid and 12-hydroxystearic acid is recommended.

  Examples of the monovalent or divalent metal in the general formula (2) include alkali metals (lithium, sodium, potassium, etc.), alkaline earth metals (calcium, strontium, barium, etc.), magnesium, zinc, etc., preferably At least one selected from the group consisting of lithium, sodium, potassium, magnesium, calcium and zinc is recommended.

Preferred fatty acid metal salts (C) include at least one aliphatic monocarboxylic acid selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid and 12-hydroxystearic acid, A fatty acid metal salt composed of at least one metal selected from the group consisting of lithium, sodium, potassium, magnesium, calcium and zinc is recommended.
Specifically, magnesium stearate, calcium stearate, zinc stearate, sodium stearate, potassium stearate, lithium stearate, 12-hydroxy magnesium stearate, 12-hydroxy calcium stearate, 12-hydroxy zinc stearate, 12- Examples include sodium hydroxystearate, potassium 12-hydroxystearate, lithium 12-hydroxystearate and the like. These may be used alone or in appropriate combination of two or more.

When the fatty acid metal salt (C) is contained in the polypropylene resin of the present invention, the content thereof is 0.001 to 10 parts by weight, particularly 0.01 to 10 parts by weight with respect to 100 parts by weight of the polypropylene resin (A). 5 parts by weight is preferred. If it is less than 0.001 part by weight, it is difficult to obtain the combined effect, and even if it exceeds 10 parts by weight, it is difficult to obtain the combined effect corresponding to the content.
The ratio of the fatty acid metal salt (C) to the amide compound (B) is preferably 0.05 to 5 parts by weight, particularly preferably 0.1 to 2 parts by weight, based on 1 part by weight of the amide compound. Is recommended.

Other additives (D)
Furthermore, the following modifiers for polyolefin, etc. can be blended in the polypropylene resin composition for sheet or film molding of the present invention as other additives (D) as required, as long as the effects of the present invention are not impaired. .

Examples of the polyolefin modifier include various additives described in "Polylist Additives Manual" (January 2002) edited by the Sanitation Council for Polyolefins.
Specifically, stabilizers (metal compounds, epoxy compounds, nitrogen compounds, phosphorus compounds, sulfur compounds, etc.), hindered amine light stabilizers (HALS), ultraviolet absorbers (benzophenone compounds, benzotetraazole compounds, etc.), Antioxidants (phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants, etc.), surfactants, lubricants (aliphatic hydrocarbons such as paraffin and wax, higher fatty acids having 8 to 22 carbon atoms, carbon A higher aliphatic alcohol having 8 to 22 carbon atoms, a polyglycol, an ester of a higher fatty acid having 4 to 22 carbon atoms and an aliphatic monohydric alcohol having 4 to 18 carbon atoms, a higher fatty acid amide having 8 to 22 carbon atoms, silicone oil, Rosin derivatives, etc.), fillers (talc, hydrotalcite, mica, zeolite, perlite, diatomaceous earth, calcium carbonate, glass fiber, etc.), foaming In addition to foaming aids and polymer additives, plasticizers (dialkyl phthalates, dialkyl hexahydrophthalates, etc.), crosslinking agents, crosslinking accelerators, antistatic agents, flame retardants, dispersants, organic inorganic pigments, processing aids, Various additives such as other nucleating agents are exemplified.

Examples of the other nucleating agent include lithium benzoate, sodium benzoate, aluminum benzoate, 4-tert-butylbenzoic acid aluminum salt, carboxylic acid metal salts such as sodium adipate; sodium bis (4-tert-butylphenyl) ) Phosphate, cyclic organophosphate metal salt; 1,3: 2,4-di-O-benzylidene-D-sorbitol, 1,3: 2,4-bis-O- (p-methylbenzylidene) -D- And sorbitol derivatives such as sorbitol and 1,3: 2,4-bis-O- (3,4-dimethylbenzylidene) -D-sorbitol.
These nucleating agents can be used alone or in appropriate combination of two or more. As for those compounding quantities, 0.001-5 weight part is preferable with respect to 100 weight part of polypropylene resins (A).

  Specific examples of the hindered amine light stabilizer (HALS) include 2,2,6,6-tetramethyl-4-piperidyl stearate and 1,2,2,6,6-pentamethyl-4-piperidyl stearate. 2,2,6,6-tetramethyl-4-piperidylbenzoate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl- 4-piperidyl) sebacate, bis (1-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate, 2,2, 6,6-tetramethyl-piperidyl methacrylate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-butanetetracarbo Silate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, bis (2,2,6,6-tetramethyl-4-piperidyl) ) .Bis (tridecyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) .bis (tridecyl) -1,2,3 4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) -2-butyl-2- (3,5-ditert-butyl-4-hydroxybenzyl) malonate, 3,9-bis [1,1-dimethyl-2- [tris (2,2,6,6-tetramethyl-4-piperidyloxycarbonyloxy) butylcarbonyloxy] ethyl] -2,4,8,10 Tetraoxaspiro [5.5] undecane, 3,9-bis [1,1-dimethyl-2- [tris (1,2,2,6,6-pentamethyl-4-piperidyloxycarbonyloxy) butylcarbonyloxy] Ethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane;

1,6-bis (2,2,6,6-tetramethyl-4-piperidylamino) hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,6-bis (2,2 , 6,6-tetramethyl-4-piperidylamino) hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,5,8,12-tetrakis [2,4-bis (N-butyl-N- (2,2,6,6-tetramethyl-4-piperidyl) amino) -s-triazin-6-yl] -1,5,8,12-tetraazadodecane, 1,5 , 8,12-tetrakis [2,4-bis (N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino) -s-triazin-6-yl] -1, 5,8,12-tetraazadodecane, 1,6,11-tri [2,4-bis (N-butyl-N- (2,2,6,6-tetramethyl-4-piperidyl) amino) -s-triazin-6-ylamino] undecane, 1,6,11-tris [ Cyanuric chloride condensed HALS such as 2,4-bis (N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino) -s-triazin-6-ylamino] undecane;

1- (2-hydroxyethyl) -2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis (2,2,6,6-tetramethyl-4- And high molecular weight type HALS such as piperidylamino) hexane / dibromoethane polycondensate.

  These hindered amine light stabilizers (HALS) can be used singly or in appropriate combination of two or more. As for those compounding quantities, 0.001-10 weight part is preferable with respect to 100 weight part of polypropylene resins (A).

Examples of the ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 5,5′-methylenebis (2-hydroxy-4-methoxybenzophenone). 2-hydroxybenzophenones such as 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3,5 -Dicumylphenyl) benzotriazole, 2,2'-methylenebis (4-tertiary Octyl-6-benzotriazolylphenol), 2- (2-hydroxy-3-tert-butyl-5-carboxyphenyl) benzotriazole polyethylene glycol ester, 2- [2-hydroxy-3- (2-acryloyloxy) Ethyl) -5-methylphenyl] benzotriazole, 2- [2-hydroxy-3- (2-methacryloyloxyethyl) -5-tert-butylphenyl] benzotriazole, 2- [2-hydroxy-3- (2- Methacryloyloxyethyl) -5-tert-octylphenyl] benzotriazole, 2- [2-hydroxy-3- (2-methacryloyloxyethyl) -5-tert-butylphenyl] -5-chlorobenzotriazole, 2- [2 -Hydroxy-5- (2-methacryloyloxyethyl) phenyl] benzo Triazole, 2- [2-hydroxy-3-tert-butyl-5- (2-methacryloyloxyethyl) phenyl] benzotriazole, 2- [2-hydroxy-3-tert-amyl-5- (2-methacryloyloxyethyl) ) Phenyl] benzotriazole, 2- [2-hydroxy-3-tert-butyl-5- (3-methacryloyloxypropyl) phenyl] -5-chlorobenzotriazole, 2- [2-hydroxy-4- (2-methacryloyl) Oxymethyl) phenyl] benzotriazole, 2- [2-hydroxy-4- (3-methacryloyloxy-2-hydroxypropyl) phenyl] benzotriazole, 2- [2-hydroxy-4- (3-methacryloyloxypropyl) phenyl ] 2- (2-hydroxyphenyl) such as benzotriazole Benzotriazoles; 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl-1,3,5-triazine, 2- (2-hydroxy-4-hexyloxyphenyl) -4,6-diphenyl -1,3,5-triazine, 2- (2-hydroxy-4-octoxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- [2- Hydroxy-4- (3-C12-13 mixed alkoxy-2-hydroxypropoxy) phenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- [2-hydroxy- 4- (2-acryloyloxyethoxy) phenyl] -4,6-bis (4-methylphenyl) -1,3,5-triazine, 2- (2,4-dihydroxy-3-allylphenyl) 4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2,4,6-tris (2-hydroxy-3-methyl-4-hexyloxyphenyl) -1,3,5 2- (2-hydroxyphenyl) -4,6-diaryl-1,3,5-triazines such as triazine; phenyl salicylate, resorcinol monobenzoate, 2,4-ditert-butylphenyl-3,5-di Tert-butyl-4-hydroxybenzoate, octyl (3,5-ditert-butyl-4-hydroxy) benzoate, dodecyl (3,5-ditert-butyl-4-hydroxy) benzoate, tetradecyl (3,5-di Tert-butyl-4-hydroxy) benzoate, hexadecyl (3,5-ditert-butyl-4-hydroxy) benzoate, octadecyl (3,5-ditert-butyl) Benzoates such as til-4-hydroxy) benzoate and behenyl (3,5-ditert-butyl-4-hydroxy) benzoate; 2-ethyl-2′-ethoxyoxanilide, 2-ethoxy-4′-dodecyloxy Substituted oxanilides such as zanilides; cyanoacrylates such as ethyl-α-cyano-β, β-diphenyl acrylate and methyl-2-cyano-3-methyl-3- (p-methoxyphenyl) acrylate; various metal salts Alternatively, metal chelates, particularly nickel or chromium salts or chelates may be mentioned.
These ultraviolet absorbers can be used alone or in appropriate combination of two or more. As for those compounding quantities, 0.001-10 weight part is preferable with respect to 100 weight part of polypropylene resins (A).

  Examples of the antioxidant include triphenyl phosphite, tris (2,4-ditertiarybutylphenyl) phosphite, tris (2,5-ditertiarybutylphenyl) phosphite, and tris (nonylphenyl) phosphite. , Tris (dinonylphenyl) phosphite, tris (mono, dimixed nonylphenyl) phosphite, diphenyl acid phosphite, 2,2′-methylenebis (4,6-ditert-butylphenyl) octyl phosphite, diphenyldecyl Phosphite, diphenyloctyl phosphite, di (nonylphenyl) pentaerythritol diphosphite, phenyl diisodecyl phosphite, tributyl phosphite, tris (2-ethylhexyl) phosphite, tridecyl phosphite, trilauryl phosphite, Butyl acid phosphite, dilauryl acid phosphite, trilauryl trithiophosphite, bis (neopentyl glycol) 1,4-cyclohexanedimethyl diphosphite, bis (2,4-ditert-butylphenyl) pentaerythritol diphos Phyto, bis (2,5-ditert-butylphenyl) pentaerythritol diphosphite, bis (2,6-ditert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,4-dicumyl) Phenyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, tetra (C12-15 mixed alkyl) -4,4′-isopropylidene diphenyl phosphite, bis [2,2′-methylenebis (4,6-dia) Milphenyl)], isop Ropyridene diphenyl phosphite, tetratridecyl 4,4'-butylidenebis (2-tert-butyl-5-methylphenol) diphosphite, hexa (tridecyl) 1,1,3-tris (2-methyl-5-tert Tributyl-4-hydroxyphenyl) butane triphosphite, tetrakis (2,4-ditert-butylphenyl) biphenylene diphosphonite, tris (2-[(2,4,7,9-tetrakis tert-butyldibenzo [ d, f] [1,3,2] dioxaphosphin-6-yl) oxy] ethyl) amine, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 2 -Phosphorous antioxidants such as butyl-2-ethylpropanediol, 2,4,6-tritert-butylphenol monophosphite,

2,6-ditert-butyl-p-cresol, 2,6-diphenyl-4-octadecyloxyphenol, stearyl (3,5-ditert-butyl-4-hydroxyphenyl) propionate, distearyl (3,5 -Ditert-butyl-4-hydroxybenzyl) phosphonate, tridecyl 3,5-ditert-butyl-4-hydroxybenzylthioacetate, thiodiethylenebis [(3,5-ditert-butyl-4-hydroxyphenyl) Propionate], 4,4′-thiobis (6-tert-butyl-m-cresol), 2-octylthio-4,6-di (3,5-ditert-butyl-4-hydroxyphenoxy) -s-triazine, 2,2′-methylenebis (4-methyl-6-tert-butylphenol), bis [3,3-bis (4-hydroxy-3-tert-butylphenol) ) Butyric acid] glycol ester, 4,4′-butylidenebis (2,6-ditert-butylphenol), 4,4′-butylidenebis (6-tert-butyl-3-methylphenol), 2,2′-ethylidene Bis (4,6-ditert-butylphenol), 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, bis [2-tert-butyl-4-methyl-6 -(2-hydroxy-3-tert-butyl-5-methylbenzyl) phenyl] terephthalate, 1,3,5-tris (2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl) isocyanurate, 1 , 3,5-tris (3,5-ditert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-tris (3,5-ditert-butyl-4-hydroxybenzoate) Ndyl) -2,4,6-trimethylbenzene, 1,3,5-tris [(3,5-ditert-butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, tetrakis [methylene-3- (3 ', 5'-ditert-butyl-4'-hydroxyphenyl) propionate] methane, 2-tert-butyl-4-methyl-6- (2-acryloyloxy-3-tert-butyl-5-methylbenzyl) Phenol, 3,9-bis [2- (3-tert-butyl-4-hydroxy-5-methylhydrocinnamoyloxy) -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [ 5.5] phenolic antioxidants such as undecane, triethylene glycol bis [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate],

Dialkylthiodipropionates such as dilauryl, dimyristyl, myristylstearyl and distearyl esters of thiodipropionic acid, and β-alkylmercaptopropionates of polyols such as pentaerythritol tetra (β-dodecyl mercaptopropionate) And sulfur-based antioxidants.

  These antioxidants can be used alone or in appropriate combination of two or more. As for those compounding quantities, 0.001-10 weight part is preferable with respect to 100 weight part of polypropylene resins (A).

Method for Producing Sheet or Film Molding Polypropylene Resin Composition The method for producing a sheet or film molding polypropylene resin composition according to the present invention is not particularly limited as long as the effects of the present invention are not impaired, and a conventionally known polypropylene resin is mainly used. The manufacturing method applied to manufacture of the resin composition used as a component can be used.
In particular,
(I) Polypropylene resin (A) (in the form of powder, granules, pellets, etc.), an amide compound (B), and optionally a fatty acid metal salt (C) and / or other additives (D) And mixing at room temperature (for example, dry blend etc.) to make a dry blend type resin composition,
(Ii) A method of melt-kneading the dry blend type resin composition into a pellet type resin composition,
A method of using a pellet type resin composition is recommended.
Mixing devices used for mixing (dry blending) include mixers with high-speed stirrers such as tumbler mixers, Henschel mixers, super mixers, ribbon blenders, tumbler mixers, etc. Is mentioned.
Examples of the apparatus used for melt kneading include apparatuses used in the field of sheet or film forming, such as a conventionally known uniaxial or biaxial screw extruder and tandem kneading extruder. The resin temperature at the time of melt-kneading is usually 180 to 300 ° C, preferably 200 to 280 ° C.
In the melt-kneading step, it is preferable to dissolve the amide compound (B) in the molten polypropylene resin (A) because the effect of the present invention is easily exhibited.

In addition, as a method for adding the amide compound (B) and, if necessary, the fatty acid metal salt (C) and / or other additives (D) to the polypropylene resin (A), for example, (i) polypropylene resin ( A) a method of separately adding the amide compound (B) and, if necessary, the fatty acid metal salt (C) and / or other additives (D),
(Ii) After mixing the amide compound (B) with the fatty acid metal salt (C) and / or other additives (D) as necessary to obtain a dry blend type mixture, the mixture is converted into a polypropylene resin (A )
(Iii) Amide compound (B), if necessary, fatty acid metal salt (C) and / or other additives (D), and if necessary, granulation aids such as wax, solvent, silica, etc. as binder After dry blending at a desired ratio, heating or wet granulation is performed to form a one-pack composite additive (in the form of granules, granules, pellets, etc.), and the composite additive is added to the polypropylene resin (A). Method,
Etc.

Unstretched sheet or film and production method thereof The unstretched sheet or film molding of the present invention can be obtained by molding the sheet or film-forming polypropylene resin composition of the present invention. Here, “unstretched” refers to a sheet or film that has not undergone a stretching process as described below, and is not substantially stretched.
As a method for molding the sheet or film-forming polypropylene resin composition of the present invention (that is, to propose a method for producing an unstretched sheet or film molded body of the present invention), a conventionally known molding method is used. Examples thereof include a calendar molding method, an extrusion molding method (T-die method, etc.), an inflation molding method, a cast film molding method, and the like. When a sheet molded body is desired, an extrusion molding method (T-die method or the like) is recommended. When a film molded body is desired, an inflation molding method is recommended.

In these molding methods, it is preferable to mold the polypropylene resin in a state where the amide compound (B) is dissolved in the molten polypropylene resin. This forming method (manufacturing method) is a method for effectively exhibiting the effects of the present invention.
The melting temperature (resin temperature) at that time also depends on the amount of the amide compound added (the more the amount added, the higher the temperature shifts), but usually 180 to 300 ° C, preferably 190 to 280 ° C, More preferably, it is 200-260 degreeC.

  The molding method will be described more specifically. For example, in the case of the T die-extrusion molding method, the above-described sheet or film-forming polypropylene resin composition (dry blend type, pellet type, etc.) is applied to an extruder equipped with a T die. And melt kneading at the melting temperature (preferably the resin temperature at which the amide compound is dissolved in the molten polypropylene resin), and the molten sheet extruded from the T die is at a predetermined temperature (usually 10 to 90 ° C., preferably above the dew point) It can be molded (manufactured) by cooling and solidifying on a chill roll of 40 ° C. or less.

  The thickness of the unstretched sheet molded product of the present invention is usually about 0.05 to 2 mm. The film thickness of the unstretched film molded product of the present invention is usually about 10 to 100 μm, preferably about 15 to 80 μm.

The uniformity of the thickness of the sheet or film molded body is one of the important characteristics in terms of the quality of the molded body. The thickness uniformity of the molded body is preferably 0.12 or less, more preferably 0.03 to 0.10, and particularly preferably 0.03 to 0.07.
In the present invention, “thickness uniformity” is a value evaluated by a test method described later. The smaller the value, the higher the thickness uniformity.

Stretched film and production method thereof The stretched film of the present invention is obtained by uniaxially stretching or sequentially or simultaneously forming the above-described unstretched sheet or film molded body by a known roll method, tenter method, gear stretch method, or a combination of these methods. It can be produced by biaxial stretching.
The stretching direction may be uniaxially stretched in the machine direction (hereinafter referred to as “longitudinal direction”) or in a direction perpendicular to the machine direction (hereinafter referred to as “transverse direction”), or biaxially stretched. It may be. Biaxial stretching may be simultaneous biaxial stretching or sequential biaxial stretching.
Moreover, when manufacturing a stretched film is described in the claims and the specification, an unstretched sheet or a film molded product is referred to as a “raw sheet”.

  What is necessary is just to select the thickness of this raw fabric sheet suitably according to a stretched film (final product), Preferably it is the range of 50-2000 micrometers, More preferably, the range of 100-1000 micrometers is recommended.

<Uniaxial stretching>
As uniaxial stretching conditions, the stretching temperature is preferably 125 to 165 ° C, more preferably 135 to 150 ° C. The draw ratio is preferably 2 to 10 times, more preferably 2 to 7 times, and particularly 3 to 5.5 times.
The stretching speed is preferably 5 to 300% / second, more preferably 30 to 200% / second, particularly 50 to 180% / second. Further, after stretching, a tension heat treatment or a relaxation heat treatment may be performed. Examples of the heat treatment conditions include a treatment temperature of 130 to 170 ° C. and a treatment time of 1 to 300 seconds.

<Sequential or simultaneous biaxial stretching>
As sequential biaxial stretching conditions, the longitudinal stretching temperature is preferably 125 to 165 ° C, more preferably 135 to 150 ° C. The longitudinal draw ratio is preferably 2 to 10 times, preferably 2 to 7 times, particularly 3 to 5.5 times. The transverse stretching temperature is preferably 150 to 175 ° C, more preferably 155 to 165 ° C. The transverse draw ratio is preferably 2 to 10 times, more preferably 2 to 7 times, and particularly preferably 3 to 5.5 times.
The stretching speed is preferably 5 to 300% / second, more preferably 30 to 200% / second, particularly 50 to 180% / second. Further, after stretching, a tension heat treatment or a relaxation heat treatment may be performed. Examples of the heat treatment conditions include a treatment temperature of 130 to 170 ° C. and a treatment time of 1 to 300 seconds.

As simultaneous biaxial stretching conditions, the stretching temperature is preferably 135 to 165 ° C, more preferably 140 to 155 ° C. The longitudinal draw ratio is preferably 2 to 10 times, more preferably 2 to 7 times, particularly 3 to 5.5 times. The transverse draw ratio is preferably 2 to 10 times, more preferably 2 to 7 times, and particularly preferably 3 to 5.5 times.
The stretching speed is preferably 5 to 300% / second, more preferably 30 to 200% / second, particularly 50 to 180% / second. Further, after stretching, a tension heat treatment or a relaxation heat treatment may be performed. Examples of the heat treatment conditions include a treatment temperature of 130 to 170 ° C. and a treatment time of 1 to 300 seconds.

  The thickness of the uniaxially stretched film of the present invention is not particularly limited, but is usually about 10 to 250 μm, preferably about 15 to 200 μm. The thickness of the sequential or simultaneous biaxially stretched film of the present invention is not particularly limited, but is usually about 3 to 200 μm, preferably about 5 to 120 μm.

  The uniformity of the thickness of the stretched film is one of the important characteristics in terms of film quality. The uniformity of the thickness of the stretched film is preferably 0.12 or less, more preferably 0.04 to 0.10, and particularly preferably 0.04 to 0.07.

  When producing a sheet molded body, a film molded body or a stretched film using the sheet or film-forming polypropylene resin composition of the present invention, a plurality of the resin compositions may be used as appropriate to form a multilayer. Good. Further, the polypropylene resin composition of the present invention and other different sheet or film molding resin compositions may be combined to form a multilayer.

  The sheet molded body, film molded body or stretched film thus obtained can be used for (food) packaging materials, general industrial containers, cosmetic containers, food containers, stationery, toys, medical fields (containers such as injection solutions, syringes, etc.) It can be suitably used for automobile interior and exterior.

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to these Examples.
Molding processability of the resin composition for sheet or film molding of the present invention, and transparency, heat resistance, odor / migration characteristics, surface smoothness of the sheet or film molded body and stretched film obtained by molding the resin composition And blocking resistance were measured and evaluated by the following methods.

(1) Molding processability (i) The molten polypropylene resin composition discharged from the T-die was visually evaluated for uneven discharge.
A: Uneven discharge is not recognized.
○: Slight discharge unevenness is observed.
Δ: Discharge unevenness is observed.
X: Discharge unevenness is remarkably observed.
(ii) The plate-out property (roll contamination property) was visually evaluated.
A: Plate out to roll is not allowed.
○: Almost no plate-out to roll.
Δ: Slight plate-out to roll is observed.
X: Plate out to a roll is recognized.
(Iii) The stretched state of the stretched film when stretched was visually evaluated.
◯: No breakage or stretching unevenness is observed, and stretching is smooth.
(Triangle | delta): Although extending | stretching nonuniformity is recognized slightly, extending | stretching is smooth.
X: The broken part and the extending | stretching nonuniformity are recognized.

(2) After applying liquid paraffin to both surfaces of the transparent sheet molded body and the stretched film, a predetermined number of sheets were superposed, and a haze value (%) was measured according to ASTM D-1003 using a haze meter manufactured by Toyo Seiki Seisakusho. ) Was measured. It shows that it is excellent in transparency, so that the obtained numerical value is small.
In Examples 1 to 6 and Comparative Examples 1 to 4, the obtained sheet molded bodies were evaluated by overlapping five sheets. In Examples 7 to 10 and Comparative Examples 5 to 7, 10 obtained uniaxially stretched film molded bodies were overlapped and evaluated. In Examples 11 to 14 and Comparative Examples 8 to 10, 17 obtained sequential biaxially stretched films were superposed and evaluated.

(3) Using a heat-resistant differential scanning calorimeter DSC-7 (device name, manufactured by Perkin Elmer), the melting behavior of the sheet compact and the stretched film was measured. The maximum endothermic peak temperature obtained by measurement was taken as the melting temperature of the sheet compact. The higher this temperature, the higher the heat resistance.

(4) Odor and migration characteristics (i) Migration: 10 sheets of 200 μm sheet molded product (3 cm × 3 cm) and 100 ml of distilled water were sealed in a 225 ml glass bottle, and left to stand in a fine oven at 60 ° C. for 3 hours. did. Next, the molded body was taken out after cooling at room temperature for 2 hours. A sensory test was performed by comparing the sample with a blank for 6 panelists. As the blank, the sheet molded body corresponding to Comparative Example 1 and Comparative Example 2 was used.
Evaluation was performed by the total score of 6 people using the following criteria. The smaller the score, the less the transferability to a water-soluble liquid.
1 point: No difference from the blank.
2 points; slightly different from blank.
3 points: Slight odor is observed.
4 points; I feel a weak odor.
5 points: Strong odor is recognized.
(Ii) Odor characteristics: Ten sheets of the obtained sheet molded product (3 cm × 3 cm) or 15 sheets of stretched film (3 cm × 3 cm) were put in a 225 ml glass bottle, sealed, and left in a fine oven at 90 ° C. for 3 hours. did. Next, it was cooled at room temperature for 2 hours. An odor test was conducted by comparing the sample with a blank for 6 panelists. As the blank, a sheet molded body corresponding to Comparative Example 1 and Comparative Example 2 or a stretched film corresponding to Comparative Example 5 and Comparative Example 6 was used.
Evaluation was performed by the total score of 6 people using the following criteria. The smaller the score, the better the odor characteristics.
1 point: No difference from blank.
2 points; slightly different from blank.
3 points: Slight odor is observed.
4 points; I feel a weak odor.
5 points: Strong odor is recognized.

(5) Surface smoothness (i) Thickness uniformity; to the center line in the width direction of the obtained sheet molded product or stretched film (that is, the center line connecting the points that bisect the film width in the vertical direction) Then, the thickness of the film was measured with a film thickness meter (“SME-1” manufactured by Sanko Electronics Laboratory) at 20 points at 1 cm intervals in the vertical direction. Using the measurement results, “thickness uniformity” was determined according to the following formula (1). The smaller the value, the higher the thickness uniformity.
Thickness uniformity = (Tmax-Tmin) / Tave (1)
[In formula, Tave shows the average value of 20 thickness measurement values. Tmax indicates the maximum value of 20 measured thickness values. Tmin indicates the minimum value of 20 measured thickness values. ]
(Ii) Surface defects: Surface defects (surface conditions (irregularities etc.), fish eye generation state, pinhole generation state) were comprehensively observed visually and evaluated according to the following criteria.
A: Almost no surface defects are observed.
○: Surface defects are recognized although they are very small.
Δ: Surface defects are observed.
X: Many surface defects are recognized.

(6) Blocking resistance Two sheet compacts were stacked and allowed to stand at room temperature for 1 week under a load of 80 g / cm ² . One week later, the situation and film state when the two molded bodies were peeled off were observed.
A: Blocking is not allowed.
○: Almost no blocking.
Δ: Slight blocking is observed.
X: Blocking is recognized.

Sheet or film molding; Examples 1-6
[Example 1]
Isotactic homopolypropylene polymer (MFR = 5.0 g / 10 min, hereinafter abbreviated as “h-PP”) 100 parts by weight, 1,2,3-propane as amide compound (B) 0.15 part by weight of tricarboxylic acid tri (2-methylcyclohexylamide) (hereinafter abbreviated as “PTC-2MeCHA”), 0.05 part by weight of calcium stearate as a fatty acid metal salt, and tetrakis [methylene-3 -(3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane (manufactured by Ciba Specialty Chemicals, trade name “IRGANOX1010”) 0.05 parts by weight and tetras (2,4-di-t- Butylphenyl) phosphite (Ciba Specialty Chemicals, trade name “IRGAFOS168”) 5 parts by weight were blended, were dry blended 1000 rpm, 5 minutes by a Henschel mixer.
Next, it is melt-kneaded using a twin screw extruder having a resin temperature of 240 ° C. and a diameter of 15 mm, the extruded strand is water-cooled, and then the obtained strand is cut to obtain the pellet-like sheet of the present invention or A polypropylene resin composition for film molding was obtained.
The ratio of stereoisomers at the 2-methylcyclohexyl moiety of PTC-2MeCHA was trans isomer: cis isomer = 74.3: 25.7. PTC-2MeCHA was in the form of a powder having a maximum particle size of 106 μm.

The obtained sheet or film-forming polypropylene resin composition is supplied to an extrusion molding machine equipped with a T-die, melt-kneaded at a resin temperature of 230 ° C, extruded into a sheet, and cooled and solidified with a chill roll having a surface temperature of 40 ° C. A sheet molded article (raw sheet) having a thickness of about 200 μm according to the present invention was obtained.
The molding processability of the composition and the transparency, heat resistance, odor / migration characteristics, surface smoothness and blocking resistance of the obtained sheet molding were evaluated, and the results are shown in Table 1.
In the resin composition, it was confirmed in advance that the PTC-2MeCHA was dissolved in h-PP at a resin temperature of 230 ° C. Similarly, in the following examples, it was confirmed that the amide compound (B) was dissolved in the polypropylene resin (A) at the resin temperature (molding temperature).

[Example 2]
Except not using a fatty-acid metal salt (C), it carried out like Example 1 and the sheet molded object (raw fabric sheet) of thickness about 200 micrometers of this invention was obtained.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[Example 3]
Instead of the homopolypropylene polymer, an isotactic propylene-ethylene random copolymer (ethylene content 3.0% by weight, MFR = 12 g / 10 minutes, hereinafter abbreviated as “r-PP”) was used. Was carried out in the same manner as in Example 1 to obtain a sheet molded body (raw fabric sheet) having a thickness of about 200 μm of the present invention.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[Example 4]
Except not using fatty acid metal salt (C), it carried out similarly to Example 3 and obtained the sheet molded object (raw fabric sheet) about 200 micrometers thick of this invention.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 3, and the results are shown in Table 1.

[Example 5]
The same procedure as in Example 3 was performed except that 1,2,3-propanetricarboxylic acid tricyclohexylamide (hereinafter abbreviated as “PTC-CHA”) was used instead of PTC-2MeCHA. A sheet molded body (raw sheet) having a thickness of about 200 μm was obtained.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 3, and the results are shown in Table 1.
The maximum particle size of PTC-CHA was 106 μm in powder form.

[Example 6]
In place of PTC-2MeCHA, 1,2,3,4-butanetetracarboxylic acid tetra (2-methylcyclohexylamide) (hereinafter abbreviated as “BTC-2MeCHA”) is used, and the resin temperature (kneading temperature and molding) is used. Except that the temperature was changed to 250 ° C., the same procedure as in Example 3 was carried out to obtain a sheet molded article (raw fabric sheet) having a thickness of about 200 μm of the present invention.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 3, and the results are shown in Table 1.
The ratio of stereoisomers at the 2-methylcyclohexyl site of BTC-2MeCHA was trans isomer: cis isomer = 54.6: 45.4. BTC-2MeCHA was in the form of a powder having a maximum particle size of 106 μm.

[Comparative Example 1]
Except not using amide type compound (B) and fatty acid metal salt (C), it carried out like Example 1 and obtained a sheet fabrication object (raw material sheet) of thickness about 200 micrometers outside the present invention.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[Comparative Example 2]
Except not using amide type compound (B) and fatty acid metal salt (C), it carried out like Example 3 and obtained a sheet fabrication object (raw sheet) of thickness about 200 micrometers outside the present invention.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 3, and the results are shown in Table 1.

[Comparative Example 3]
Example 3 was used except that methylenebis (2,4-di-tert-butylphenyl) phosphate sodium salt (hereinafter abbreviated as “nucleating agent A”) was used instead of the amide compound (B). In the same manner, a sheet molded body (raw sheet) having a thickness of about 200 μm outside the present invention was obtained.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 3, and the results are shown in Table 1.

[Comparative Example 4]
Instead of the amide compound (B), 1,3: 2,4-bis-O- (p-methylbenzylidene) -D-sorbitol (hereinafter abbreviated as “nucleating agent B”) was used. Was carried out in the same manner as in Example 3 to obtain a sheet molded body (raw fabric sheet) having a thickness of about 200 μm outside the present invention.
The moldability of the resin composition and the properties of the obtained sheet molded body were evaluated in the same manner as in Example 3, and the results are shown in Table 1.

Uniaxial stretching; Examples 7-10
[Example 7]
Using the biaxial stretching machine (manufactured by Toyo Seiki Co., Ltd.), the original sheet obtained in Example 1 is uniaxially stretched in the machine direction at a stretching temperature of 135 ° C., a stretching speed of 100% / second, and a stretching ratio of 4 times. And a uniaxially stretched film having a thickness of about 100 μm of the present invention was obtained.
The moldability of the raw sheet and the moldability, transparency, heat resistance, odor characteristics and surface smoothness of the obtained film were evaluated. The results are shown in Table 2.

[Example 8]
A uniaxially stretched film having a thickness of about 100 μm of the present invention was obtained in the same manner as in Example 7 except that the raw sheet obtained in Example 2 was used.
The moldability of the raw sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 7. The results are shown in Table 2.

[Example 9]
A uniaxially stretched film having a thickness of about 100 μm according to the present invention was obtained in the same manner as in Example 7 except that the raw sheet obtained in Example 3 was used.
The moldability of the raw sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 7. The results are shown in Table 2.

[Example 10]
Except having used the original fabric sheet obtained in Example 5 for the original fabric sheet, it carried out similarly to Example 7 and obtained the uniaxially stretched film of thickness about 100 micrometers of this invention.
The moldability of the raw sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 7. The results are shown in Table 2.

[Comparative Example 5]
A uniaxially stretched film having a thickness of about 100 μm outside the present invention was obtained in the same manner as in Example 7 except that the original sheet obtained in Comparative Example 1 was used as the original sheet.
The moldability of the raw sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 7. The results are shown in Table 2.

[Comparative Example 6]
A uniaxially stretched film having a thickness of about 100 μm outside the present invention was obtained in the same manner as in Example 7 except that the original sheet obtained in Comparative Example 2 was used as the original sheet.
The moldability of the raw sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 7. The results are shown in Table 2.

[Comparative Example 7]
A uniaxially stretched film having a thickness of about 100 μm outside the present invention was obtained in the same manner as in Example 7 except that the original sheet obtained in Comparative Example 3 was used as the original sheet.
The moldability of the raw sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 7. The results are shown in Table 2.

Sequential biaxial stretching; Examples 11-14
[Example 11]
Using the biaxial stretching machine (manufactured by Toyo Seiki Co., Ltd.), the raw sheet obtained in Example 1 is stretched in the machine direction at a stretching temperature of 135 ° C., a stretching speed of 100% / second, and a stretching ratio of 4 times. The film was continuously stretched in the transverse direction at a stretching temperature of 155 ° C., a stretching speed of 100% / second, and a stretching ratio of 2 to obtain a sequential biaxially stretched film having a thickness of about 60 μm.
The moldability of the raw sheet and the moldability, transparency, heat resistance, odor characteristics and surface smoothness of the obtained film were evaluated. The results are shown in Table 3.

[Example 12]
A sequential biaxially stretched film having a thickness of about 100 μm of the present invention was obtained in the same manner as in Example 11 except that the original sheet obtained in Example 2 was used as the original sheet.
The moldability of the raw fabric sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 11, and the results are shown in Table 3.

[Example 13]
A sequential biaxially stretched film having a thickness of about 60 μm of the present invention was obtained in the same manner as in Example 11 except that the original sheet obtained in Example 3 was used as the original sheet.
The moldability of the raw fabric sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 11, and the results are shown in Table 3.

[Example 14]
A sequential biaxially stretched film having a thickness of about 60 μm of the present invention was obtained in the same manner as in Example 11 except that the original sheet obtained in Example 5 was used as the original sheet.
The moldability of the raw fabric sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 11, and the results are shown in Table 3.

[Comparative Example 8]
A sequential biaxially stretched film having a thickness of about 60 μm outside the present invention was obtained in the same manner as in Example 11 except that the original sheet obtained in Comparative Example 1 was used as the original sheet.
The moldability of the raw fabric sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 11, and the results are shown in Table 3.

[Comparative Example 9]
A sequential biaxially stretched film having a thickness of about 60 μm outside the present invention was obtained in the same manner as in Example 11 except that the original sheet obtained in Comparative Example 2 was used as the original sheet.
The moldability of the raw fabric sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 11, and the results are shown in Table 3.

[Comparative Example 10]
A sequential biaxially stretched film having a thickness of about 60 μm outside the present invention was obtained in the same manner as in Example 11 except that the original sheet obtained in Comparative Example 3 was used as the original sheet.
The moldability of the raw fabric sheet and the properties of the obtained stretched film were evaluated in the same manner as in Example 11, and the results are shown in Table 3.

The sheet or film molded body or stretched film obtained from the sheet or film-forming polypropylene resin composition of the present invention is excellent in transparency, heat resistance, migration / odor characteristics, and surface smoothness. Therefore, the molded body and stretched film are used for (food) packaging materials, general industrial containers, cosmetic containers, food containers, stationery, toys, medical fields (containers such as injection solutions, syringes, etc.), automobile interior and exterior, etc. Can be suitably used.

Claims (18)

For 100 parts by weight of the polypropylene resin (A),
General formula (1)

[Wherein, R ¹ represents a residue obtained by removing all carboxyl groups from 1,2,3-propanetricarboxylic acid or 1,2,3,4-butanetetracarboxylic acid. k R ^{2 s} are the same as or different from each other and each represent a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms. k represents an integer of 3 or 4. ]
A polypropylene resin composition for molding a sheet or film, comprising 0.005 to 5 parts by weight of at least one amide compound (B) represented by the formula:   The polypropylene resin composition for sheet or film molding according to claim 1, wherein the polypropylene resin (A) has a melt flow rate at 230 ° C. of 0.1 to 30 g / 10 min.   The polypropylene resin composition for sheet or film molding according to claim 1 or 2, wherein the polypropylene resin (A) is a homopropylene polymer.   The polypropylene resin composition for sheet or film molding according to claim 1 or 2, wherein the polypropylene resin (A) is a copolymer of propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms.   5. The copolymer of propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms is a copolymer of propylene and ethylene or a copolymer of propylene, ethylene and 1-butene. A polypropylene resin composition for molding a sheet or film.   The content of propylene constituting a copolymer of propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms is 93.0 wt% or more and less than 100 wt% with respect to the copolymer. The polypropylene resin composition for sheet | seat or film shaping | molding of Claim 4 or Claim 5. Furthermore, the general formula (2)

[Wherein R ³ represents a residue obtained by removing a carboxyl group from a saturated or unsaturated aliphatic monocarboxylic acid having 8 to 32 carbon atoms which may have one or more hydroxyl groups in the molecule. . n represents an integer of 1 or 2, and when n = 2, two R ^{3 s} may be the same or different. M represents a monovalent or divalent metal. ]
The sheet or film-forming polypropylene resin composition according to claim 1, comprising at least one fatty acid metal salt (C) represented by:   The sheet or film-forming polypropylene resin composition according to claim 7, wherein M in the general formula (2) is at least one selected from the group consisting of alkali metals, alkaline earth metals, magnesium and zinc.   The aliphatic monocarboxylic acid in the general formula (2) is at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid and 12-hydroxystearic acid. Or the polypropylene resin composition for sheet | seat or film shaping | molding of Claim 8.   Content of fatty-acid metal salt (C) is 0.001-10 weight part with respect to 100 weight part of polypropylene resins (A), The polypropylene resin composition for sheet | seat or film shaping | molding in any one of Claims 7-9 object.   The unstretched sheet | seat or film molded object obtained by shape | molding the polypropylene resin composition for sheet | seat or film shaping | molding in any one of Claims 1-10. The unstretched sheet or film molding according to claim 11, wherein the thickness uniformity of the sheet or film molding is 0.12 or less.   A stretched film obtained by uniaxially stretching or sequentially or simultaneously biaxially stretching the unstretched sheet or film molded body according to claim 11 or 12.   The stretched film according to claim 13, wherein the uniformity of the thickness of the stretched film is 0.12 or less.   When the polypropylene resin composition for molding a sheet or film according to any one of claims 1 to 10 is molded, the polypropylene resin composition is molded in a state where the amide compound (B) is dissolved in the molten polypropylene resin. The manufacturing method of the unstretched sheet | seat or film molded object characterized by these.   A method for producing a uniaxially stretched film, wherein the unstretched sheet or film molded body according to claim 11 or 12 is uniaxially stretched at a stretching temperature of 125 to 165 ° C and a stretching ratio of 2 to 10 times.   The unstretched sheet or film molded product according to claim 11 or claim 12 is stretched longitudinally at a longitudinal stretching temperature of 125 to 165 ° C and a longitudinal stretching ratio of 2 to 10 times, and subsequently a transverse stretching temperature of 150 to 175 ° C, A method for producing a sequential biaxially stretched film, wherein the film is horizontally stretched at a stretching ratio of 2 to 10 times. The unstretched sheet or film molded body according to claim 11 or 12 is simultaneously biaxially stretched at a stretching temperature of 135 to 165 ° C, a longitudinal stretching ratio of 2 to 10 times, and a lateral stretching ratio of 2 to 10 times. A method for producing a simultaneous biaxially stretched film.