Heat-resistant stretched film and production process thereof

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

B - Operations, Transporting

29

C

18/1043

B29C 55/04 (2006.01) B29C 47/00 (2006.01) C08G 75/02 (2006.01) C08L 81/02 (2006.01) H05K 1/03 (2006.01)

Patent

CA 1323480

- 53 - ABSTRACT A heat-resistant stretched film is obtained by stretching a resin composition comprising 100 parts by weight of a poly(arylene sulfide) of a substantially linear structure and 5 to less than 100 parts by weight of a melt-stable poly(arylene thioether-ketone). The poly(arylene sulfide) has a melt viscosity of at least 1,000 poises as measured at 310°C and a shear rate of 200 sec-1. The poly(arylene thioether-ketone) has predominant recurring units of the formula Image , wherein the -CO- and -S- groups are bonded in the para position to each other through the benzene ring, and has the following physical properties (a)-(c): (a) a melting point, Tm being 310-380°C; (b) a melt crystallization temperature, Tmc (420°C/10 min) being at least 210°C and a residual melt crystallization enthalpy, .DELTA.Hmc (420 °C/10 min) being at least 10 J/g; and (c) a reduced viscosity being 0.3-2 d?/g at 25°C and a polymer concentration of 0.5 g/d? in 98% sulfuric acid.

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