Heat-shrinkable laminate film

摘要

A heat-shrinkable multilayer laminate film possessing excellent heat resistance, oil resistance and gas-barrier properties is obtained by interposing one intermediate layer of a thermoplastic resin having a crystalline melting point of from 70 DEG to 100 DEG C. between a core layer of a vinylidene chloride copolymer and outer surface layers of an ethylene/ alpha -olefin copolymer having a crystalline melting point of not lower than 110 DEG C. or a mixture of this ethylene/ alpha -olefin copolymer and an alpha -olefin polymer having a crystalline melting point of from 80 DEG to 100 DEG C. The thus obtained laminate film can be in sheet or tubular form, and is suitable for use in packaging by heat shrinkage raw meat, processed meat, cheese and other fat-containing food. This heat-shrinkable laminate film is produced by biaxially stretching the starting laminate film at a specific temperature determined by the crystalline melting points of the resins of the intermediate layer and the outer surface layers.