Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-04-13
1992-03-10
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
527471, 264 292, 525471, C08F28300
Patent
active
050950789
ABSTRACT:
Disclosed herein is a heat-resistant film obtained by biaxially-stretching a composition which comprises (A) 50-90 parts by weight of a polyetheretherketone having predominant recurring units of the formula: ##STR1## and (B) 50-10 parts by weight of a substantially linear poly(arylene sulfide) having melt viscosity of at least 1,000 poises. A production process of such a heat-resistant film is also disclosed, which comprises biaxially stretching the above composition in a temperature range at least equal to the crystallization temperature (Tc) of the poly(arylene sulfide) but not higher than the crystallization temperature (Tc) of the polyetheretherketone.
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Mizuno Toshiya
Saito Takeshi
Teramoto Yoshikichi
Wakabayashi Juichi
Kureha Kagaku Kogyo K. K.
Lee Helen F.
Marquis Melvyn I.
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