Patent ID: 6231975
Filing Date: 2001-05-15
Classification: B32B,Y10S,Y10T

Abstract:
An oriented sealable film comprising:(a) an inner layer comprising an olefin polymer which comprises polypropylene, high density polyethylene or ethylene-propylene copolymer or terpolymer, wherein the polypropylene comprises greater than about 80 wt % of isotactic polypropylene or greater than about 80 wt % of syndiotactic polypropylene, wherein the percentages are based on the entire weight of the polypropylene of the inner layer;(b) a sealing layer selected from the group consisting of ethylene-propylene random copolymer, ethylene-butene-1 copolymer, ethylene-propylene-butene-1 terpolymer, propylene-butene copolymer, low density polyethylene, linear low density polyethylene, very low density polyethylene, metallocene catalyzed polyethylene plastomer, metallocene catalyzed polyethylene, metallocene catalyzed ethylene-hexene copolymer, metallocene catalyzed ethylene-butene copolymer, metallocene catalyzed ethylene-octene copolymer, ethylene-methacrylate copolymer, ethylene-vinyl acetate copolymer and ionomer resin; and(c) a separable layer positioned between the inner layer and the sealing layer, the separable layer comprising a blend of linear low density polyethylene and ethylene-propylene block copolymer.