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Biaxially Oriented Polyarylene Sulfide Film and Laminated Polyarylene Sulfide Sheets Comprising the Same

Inactive Publication Date: 2007-12-27
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0034] According to the present invention, a high-quality biaxially oriented polyarylene sulfide film and laminated polyarylene sulfide sheet excellent in molding processability can be provided by improving the tensile elongation at break of a biaxially oriented polyarylene sulfide film having excellent heat resistance, dimensional stability, electrical properties and chemical resistance, as described above. Particularly, there can be obtained a biaxially oriented polyarylene sulfide film and a laminated polyarylene sulfide sheet which can be used preferably in an electrical insulating material for a hot-water supplier motor, a motor for car air conditioner and a driving motor used in a hybrid car, and a speaker diaphragm for cell-phone.

Problems solved by technology

However, the conventional film, sheet, laminated film and laminate described above have the following problems.
That is, the film in the item (1) above may be unsatisfactory in tensile elongation at break, impact resistance and tear propagation strength, and when used for example as a motor slot liner or as a wedge, causes film breakage or delamination in some cases.
The non-oriented PPS sheet in the item (2) above is excellent in tear propagation strength, but is extremely poor in tensile elongation at break and lowers its strength rapidly at a temperature near to the melting point, thus significantly deteriorating shape retention in some cases.
The laminate in the item (3) above is laminated without an adhesive to increase the film thickness thereby increasing the stiffness of the film, but the adhesive strength of laminate interface is insufficient so the tensile elongation at break is low thus causing a problem in processability in some cases.
As described above, the polyphenylene sulfide film is poor in ductility and tensile elongation at break, thus making its applications limited at present, and its improvement is strongly desired.
However, this resin composition has formed a structure by shear field-dependent phase solubilization / phase separation wherein the resin is destabilized again in a non-shear state to cause phase separation after it is once compatibilized in a shear field at the time of melt-kneading, and when a sheet or film is formed, its structural stability is not sufficient in some cases, and the appropriate method for forming a biaxially oriented film is not described.

Method used

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  • Biaxially Oriented Polyarylene Sulfide Film and Laminated Polyarylene Sulfide Sheets Comprising the Same
  • Biaxially Oriented Polyarylene Sulfide Film and Laminated Polyarylene Sulfide Sheets Comprising the Same
  • Biaxially Oriented Polyarylene Sulfide Film and Laminated Polyarylene Sulfide Sheets Comprising the Same

Examples

Experimental program
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Effect test

reference example 1

Polymerization of PPS (PPS-1)

[0166] A 70-L autoclave equipped with a stirrer was charged with 8,267.37 g (70.00 moles) of 47.5% sodium hydrosulfide, 2,957.21 g (70.97 moles) of 96% sodium hydroxide, 11,434.50 g (115.50 moles) of N-methyl-2-pyrrolidone (NMP), 2,583.00 g (31.50 moles) of sodium acetate and 10,500 g deionized water, and the mixture was gradually heated to 245° C. over about 3 hours at normal pressures with nitrogen passing into it, and after 14,780.1 g water and 280 g NMP were distilled away, the reaction container was cooled to 160° C. The amount of water remaining in the system, including water consumed in hydrolysis of NMP, was 1.06 moles per mole of the alkali metal sulfide charged. The amount of hydrogen sulfide scattered was 0.02 mol per mol of the alkali metal sulfide charged.

[0167] Then, 10,235.46 g (69.63 moles) of p-dichlorobenzene and 9,009.00 g (91.00 moles) of NMP were added, and the reaction container was sealed under a nitrogen gas and heated to 238° C...

reference example 2

Preparation of Copolymerized PPS Composition (PPS-2)

[0169] An autoclave was charged with 100 moles of sodium sulfide.9H2O, 45 moles of sodium hydroxide and 25-L N-methyl-2-pyrrolidone (referred to hereinafter as NMP), and the mixture was gradually heated to 220° C. under stirring to remove the contained water by distillation.

[0170] The system after conclusion of dehydration was charged with 86 moles of p-dichlorobenzene as a main monomer, 15 moles of m-dichlorobenzene as a minor monomer and 0.2 mole of 1,2,4-trichlorobenzene, together with 5-L NMP, then filled at 170° C. with 3 kg / cm2 nitrogen under pressurization, and heated to polymerize the mixture at 260° C. for 4 hours. After the polymerization was finished, the reaction mixture was cooled to precipitate the polymer in distilled water, which was then passed thorough a gauze having 150-mesh openings to recover a small massive polymer.

[0171] This polymer was washed 5 times with distilled water at 90° C. and dried at 120° C. un...

reference example 3

Preparation of Copolymerized PPS Composition (PPS-3)

[0172] An autoclave was charged with 100 moles of sodium sulfide.9H2O, 45 moles of sodium hydroxide and 25-L NMP, and the mixture was gradually heated to 220° C. under stirring to remove the contained water by distillation.

[0173] The system after conclusion of dehydration was charged with 94.8 moles of p-dichlorobenzene as a main monomer, 5 moles of m-dichlorobenzene as a minor monomer and 0.2 mole of 1,2,4-trichlorobenzene, together with 5-L NMP, then filled at 170° C. with 3 kg / cm2 nitrogen under pressurization, and heated to polymerize the mixture at 260° C. for 4 hours. After the polymerization was finished, the reaction mixture was cooled to precipitate the polymer in distilled water, which was then passed thorough a gauze having 150-mesh openings to recover a small massive polymer.

[0174] This polymer was washed 5 times with distilled water at 90° C. and dried at 120° C. under reduced pressure to give a white particulate co...

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Abstract

A biaxially oriented polyarylene sulfide film and laminated polyarylene sulfide sheets of the film contain polyarylene sulfide and other thermoplastic resin A different from the polyarylene sulfide, wherein the contents of the polyarylene sulfide and the thermoplastic resin A are 70 to 99 parts by weight and 1 to 30 parts by weight respectively when the total amount of the polyarylene sulfide and the thermoplastic resin A is taken as 100 parts by weight and the resin thermoplastic A forms a dispersed phase with an average particle diameter of 10 to 500 nm and the biaxially oriented polyarylene sulfide film exhibits a tensile elongation at break of 110 to 250% in at least one of the longitudinal direction and width direction and a tensile fracture elongation of 80 to 250% in the other direction.

Description

TECHNICAL FIELD [0001] The present invention relates to a biaxially oriented polyarylene sulfide film and a laminated polyarylene sulfide sheet, which have excellent heat resistance, dimensional stability, electrical properties and chemical resistance. The film or sheet of the present invention can be used in an electrical insulating material for a motor, a transformer, an insulated cable etc., a molding material, a circuit board material, a step / release film such as circuit / optical element etc., a protective film, a lithium ion battery material, a fuel battery material, a speaker diaphragm, etc. More specifically, the present invention relates to a biaxially oriented polyarylene sulfide film which can be preferably used in an electrical insulating material for a hot-water supplier motor, a motor for car air conditioner and a driving motor used in a hybrid car, and a speaker diaphragm for cell-phone. BACKGROUND ART [0002] In electrical insulating materials for motors, it has recentl...

Claims

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Application Information

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IPC IPC(8): C08L81/02C08J5/18C08L101/00
CPCB32B27/28B32B2307/734C08J2381/04C08L81/02C08J5/18B32B2307/518B32B27/08B32B27/281B32B27/285B32B27/286B32B27/34B32B2270/00B32B2307/206C08L2666/02C08L101/00
Inventor HIGASHIOJI, TAKUJIMACHIDA, TETSUYAOHKURA, MASATOSHIIMANISHI, YASUYUKIISHIO, ATSUSHIYAMADA, MEGUMI
Owner TORAY IND INC
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