POLYPROPYLENE FILM

摘要

A film having the low dependency of film transparency on film-forming conditions and thickness, and having superior transparency and rigidity without compromising the original properties of polypropylene film. The film is produced from a polypropylene prepared from a propylene polymer having: (1) a stereoirregularity index mmrr/mmmm of a xylene-insoluble fraction at 20.degree.C within the range of 0.0095 to 0.0200, (2) a melting temperature within the range of 145 to 160.degree.C, (3) a xylene-soluble fraction at 20.degree.C of 3.5 % by weight or less, the polypropylene having: (4) a melt-flow rate at 230.degree.C within the range of 5 to 15g/10min., and (6) a swelling ratio within the range of 1.20 to 1.35.