Patent ID: 7195818
Filing Date: 2007-03-27
Classification: B32B,C08L,Y10S,Y10T

Abstract:
1. A sealable multi-layer opaque film comprising a core layer and at least one sealable skin layer, wherein said core layer comprises an orientation-enhancing polymer, a polypropylene homopolymer and at least one beta crystal nucleator of polypropylene, wherein said orientation-enhancing polymer comprises an (isotactic propylene)-ethylene heterophasic copolymer and at least one polymer selected from the group consisting of: an impact polypropylene polymer; an impact polypropylene copolymer; an ethylene-(isotactic propylene) rubber; a metallocene isotactic polypropylene; an isotactic polypropylene grafted with elastomer; a maleated-isotactic polypropylene; a blend of an isotactic polypropylene and a syndiotactic polypropylene; a blend of an isotactic polypropylene and an atactic polypropylene; a blend of an isotactic polypropylene and an acrylic elastomer; a blend of an isotactic polypropylene and an alkenic elastomer; a blend of an isotactic polypropylene, a polyethylene, and an ethylene-propylene rubber; a blend of an isotactic polypropylene and a polyisobutylene; a blend of an isotactic polypropylene and a styrenic elastomer, a blend of an isotactic polypropylene and a metallocene isotactic polypropylene copolymer; and a blend of an isotactic polypropylene and an isotactic propylene copolymer, and wherein said orientation-enhancing polymer does not comprise an ethylene-propylene block copolymer.