| 摘要 |
PROBLEM TO BE SOLVED: To provide a biaxially stretched laminated film further reduced in oxygen permeability than a conventional technique product and excellent in piercing strength, pinhole resistance and sealability. SOLUTION: The biaxially stretched laminated film is composed of at least five layers and constituted by laminating surface and back layers, each of which comprises a composition prepared by blending polypropylene with a melting point of 157-170°C, an amorphous ethylene-1-butene copolymer and/or a block copolymer composed of a crystalline polypropylene part (hard segment) and a propylene/α-olefin random copolymer part (soft segment) in a specific ratio, on both sides of a gas barrier layer comprising a saponified material of an ethylene/vinyl acetate copolymer through an adhesive layer comprising an adhesive resin. COPYRIGHT: (C)2006,JPO&NCIPI
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