Heat-resistant film and production process thereof

Details Heat-resistant film and production process thereof Heat-resistant film and production process thereof

1991-11-05

1993-06-29

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525537, 2642902, C08G 1400, C08L 6100

Patent

active

052235858

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.

REFERENCES:
patent: 4734470 (1988-03-01), Kawabata et al.
patent: 4775571 (1988-10-01), Mizuno et al.
patent: 4826906 (1989-05-01), Satake et al.
patent: 4980114 (1990-12-01), Satake et al.

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