FILMS THERMOPLASTIQUES A BASE DE MELANGES DE POLYPROPYLENE ET DE POLYBUTYLENE

摘要

1453245 Polypropylene compositions for thermoplastic films MOBIL OIL CORP 12 March 1974 [7 May 1973] 11002/74 Heading C3P Compositions suitable for making heatshrinkable oriented thermoplastic films comprise (1) 82 to 88 weight per cent of isotactic polypropylene and (2) 18 to 12 weight per cent of isotactic polybutene-1. The compositions may be extruded to form flat or tubular films which may be oriented by biaxial stretching.