Polypropylene film

摘要

A film having a low dependency of film transparency on film-forming conditions and film 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 part insoluble in xylene at 20 DEG C. within the range of 0.0095 to 0.0200; (2) a melting temperature within the range of 145 DEG to 160 DEG C.; (3) a part soluble in xylene at 20 DEG C. of 3.5% by weight or less, the polypropylene having: (4) a melt flow rate at 230 DEG C. within the range of 5 to 15 g/10 min.; and (5) a swelling ratio within the range of 1.20 to 1.35.