Patent ID: 6333096
Filing Date: 2001-12-25
Classification: B32B,C08L,Y10T

Abstract:
A co-extruded, multilayer film comprising:(a) an outer layer of a terpolymer comprising (i) about 85% to about 96% propylene, (ii) about 0.5% to about 5.0% ethylene, and (iii) about 2.5% to about 10% of a 4-8 C alpha-olefin, wherein the total of (ii) and (iii) is about 4.0% to about 15.0%;(b) a middle layer comprising at least one of (i) 0-100% of the terpolymer described in layer (a), and (ii) 0-100% of an olefin polymer blend comprising:(A) about 99.5% to about 95% of an olefin polymer composition produced by sequential polymerization in at least two stages, comprising:(1) about 5% to about 25% by weight of a copolymer of propylene with ethylene and a C.sub.4 -C.sub.8 alpha-olefin containing about 80% to about 96% propylene, about 2% to about 10% ethylene, and about 2% to about 10% of a C.sub.4 -C.sub.8 alpha-olefin, and(2) about 95% to about 75% by weight of a linear low density polyethylene containing up to 20% by weight of a C.sub.4 -C.sub.8 alpha-olefin, and(B) about 0.5% to about 5% by weight of a low density polyethylene having a density of 0.916 to 0.922 g/cm.sup.3 and a melt index of 0.2 to 20 g/10 min,wherein (i)+(ii)=100%, and(c) an inner layer comprising at least one of (i) 0-100% of a copolymer of ethylene and a C.sub.4 -C.sub.8 alpha-olefin made with a metallocene catalyst and having a density of 0.89-0.91 g/cm.sup.3, and (ii) 0-100% of the olefin polymer blend (ii) described in layer (b), wherein (i)+(ii)=100%.