Patent ID: 6228505
Filing Date: 2001-05-08
Classification: B29C,B29K,B32B,Y10T

Abstract:
A laminate film comprising:(1) a core layer of medium density polyethylene, and optionally a cavitating agent selected from the group consisting of polystyrene, polyamide, polyester, polyacrylate, cross-linked polymeric particulates, and calcium carbonate; and(2) at least one skin layer on at least one surface of said core layer, said skin layer is a polymer selected from the group consisting of ethylene-propylene copolymer, ethylene-propylene-butylene terpolymer, and medium density polyethylene,wherein said core layer and said skin layer are coextensively adhered to each other and are biaxially oriented in both machine and traverse directions to produce a film having tear propagation in the machine direction and tear resistance in the transverse direction.