Laminated film having poly(4-methyl-1-pentene) base layer.

摘要

A laminated film comprising (A) a base layer of a polymer based on 4-methyl-1-pentene; (B) provided on at least one side of the base layer, an interlayer of an alpha -olefin copolymer comprising 10 - 85 mole% of propylene, 3 - 60 mole% of 1-butene and 10 - 85 mole% of alpha -olefin having 5 or more carbon atoms, a degree of crystallinity of the copolymer as measured by X-ray diffractometry being 20% or less; and (C) provided on the interlayer, a heat-sealable layer of an alpha -olefin polymer material predominantly comprising an alpha -olefin having 2 to 4 carbon atoms. g