Patent ID: 7993713
Filing Date: 2011-08-09
Classification: B32B,B65D,Y10T

Abstract:
1. A heat shrinkable multilayer film comprising an outer surface layer (a) formed of a thermoplastic resin, a first intermediate layer (b 1 ) formed of a polyamide resin, a second intermediate layer (b 2 ) formed of a saponified product of an ethylene-vinyl acetate copolymer, and an inner surface layer (c) formed of a polyolefin resin, wherein the shrink of the heat shrinkable multilayer film in water at 90° C. is within a range of from 3 to 45% in each of machine and transverse directions, the polyamide resin is a mixture of 60 to 90% by weight of an aliphatic polyamide having a melting point of 210° C. or higher and 10 to 40% by weight of an aromatic polyamide comprising isophthalic acid and terephthalic acid as acid components, and the multilayer film is obtained by stretching a multilayer film comprising the outer surface layer (a), the first intermediate layer (b