Patent ID: 7175906
Filing Date: 2007-02-13
Classification: B32B,C08J,C08L,C09J,Y10T

Abstract:
1. A packaging structure including a cold seal release film in the form of a monolayer film or an outer layer of a multilayer film, said cold seal release film having an outer surface and comprising a nucleating agent and 10%–100% by weight of the polymer composition of a polymer selected from the group consisting of 1-butene homopolymer, 1-butene/ethylene random copolymers having over 50% by weight 1-butene therein and blends of the 1-butene homopolymer and the 1-butene/ethylene random copolymers, and 90%–0% by weight of the polymer composition of a polymer selected from the group consisting of random copolymers of ethylene and propylene, random copolymers of butene and propylene and random terpolymers of ethylene-butene-propylene, said propylene being over 50% by weight of the polymer composition in said random copolymers of ethylene and propylene and random copolymers of butene and propylene and being the major component by weight of the random terpolymers of ethylene-butene-propylene, and a cold seal adhesive being on an outer surface of the packaging structure opposed to the outer surface of said cold seal release film.