Patent ID: 6342282
Filing Date: 2002-01-29
Classification: B32B,C08L,C09J,Y10T

Abstract:
A heat-shrinkable multi-layer film consisting essentially of four layers (A/D1/B/C), wherein a thermoplastic resin layer is the outermost layer (A), a gas barrier resin layer is a core layer (B), a sealing resin layer is the innermost layer (C), and an intermediate layer (D1) is provided between the outermost layer (A) and the core layer (B), and optionally including an adhesive layer between the individual layers, and further wherein(1) the sealing resin layer of the innermost layer (C) is a layer formed of a resin material (b) comprising a linear ethylene-1-octene copolymer (a) obtained by using a constrained geometry catalyst and having a 1-octene content not lower than 1 wt. % but lower than 20 wt. % and a density higher than 0.885 g/cm3 but not higher than 0.960 g/cm3, (2) the intermediate layer (D1) is formed of at least one resin (c) selected from the group consisting of polyamide resins, thermoplastic polyester resins and ethylene copolymer resins, (3) the outermost layer (A) is formed of at least one resin (e) selected from the group consisting of polyolefin resins, thermoplastic polyester resins, polyamide resins and the ethylene-1-octene copolymer (a), and (4) at least one of the outermost layer (A) and the intermediate layer (D1) comprises a polyamide resin or a thermoplastic polyester resin.