Patent ID: 6599639
Filing Date: 2003-07-29
Classification: A23L,B32B,Y10S,Y10T

Abstract:
A multilayer, coextruded, retortable film comprising:a) a core layer comprising a retortable grade ethylene/vinyl alcohol copolymer; b) two intermediate layers, disposed on opposite surfaces of the core layer, comprising a polyamide; c) two adhesive layers, each disposed on a surface of the respective intermediate layer, comprising a polymeric adhesive; and d) two outer layers, each comprising a material selected from the group consisting of low density polyethylene, medium density polyethylene, high density polyethylene, ethylene/alpha olefin copolymer, propylene homopolymer, and propylene/alpha olefin copolymer; wherein the film exhibits a free shrink of less than 5% in the longitudinal direction, and less than 5% in the transverse direction, at 180Â° F.