PROPYLENE POLYMER COMPOSITION AND FILMS MADE THEREFROM

摘要

A propylene polymer composition comprising a propylene homopolymer or a copolymer of propylene with an alpha -olefin having four or more carbon atoms, which homopolymer or copolymer has a high isotactic pentad fraction and an a narrow molecular weight distribution, polymerized in the presence of a metallocene catalyst, and, if necessary, further containing a nucleating agent. The composition has well-balanced rigidity and heat sealability which could not be attained in the prior art and is nonsticky and excellent in antiblocking properties. Films for packing foods or the like, obtained by molding the composition, keep high rigidity, antiblocking properties, film impact, and moldability.