Plastic and nonmetallic article shaping or treating: processes – Disparate treatment of article subsequent to working,... – Effecting temperature change
Patent
1988-07-06
1989-06-13
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Disparate treatment of article subsequent to working,...
Effecting temperature change
26421112, 2642358, 264237, 2642888, 2642902, 428419, 528388, B29C 7102, B32B 2728, C08G 7500, C08G 7514
Patent
active
048391298
ABSTRACT:
Disclosed herein is a process for producing biaxially stretched polyparaphenylene sulfide film including the steps of melt-molding a polyparaphenylene sulfide resin into a sheet-form or film-form, rapidly chilling the thus molded sheet or film thereby obtaining an amorphous and non-stretched sheet or film, subjecting the amorphous and non-stretched sheet or film to thermal treatment for from 0.5 to 20 sec at a temperature of from 150.degree. to 300.degree. C., cooling the thus treated film or sheet to room temperature and subjecting the thus cooled film or sheet to biaxial stretching at a temperature of from 80.degree. to 120.degree. C.
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patent: 4769190 (1988-09-01), Utsumi et al.
Matsunaga Satoru
Mizuno Toshiya
Yasumi Hideyuki
Kureha Kagaku Kogyo Kabushiki Kaisha
Tentoni Leo B.
Thurlow Jeffery
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