| abstract |
A material for packaging light-sensitive materials including a composite sheet (laminate) of a substrate and a thermoplastic resin layer, a layer of said sheet including light-shielding materials, wherein said thermoplastic resin layer includes a surface layer and an intermediate layer which are melt-coextruded, said surface layer being comprised of thermoplastic resin of polyolefins or ethylene copolymer containing substantially no less than 95 mol % of ethylene, said intermediate layer being comprised of one or more copolymers selected from: (a) a copolymer including 7-30 mol % of acrylic ester and/or methacrylic ester with the balance being ethylene provided that the ester is comprised of an alkyl group having 1-8 carbon atoms, and (b) a copolymer (EVA) including 7-20 mol % of vinyl acetate with the balance being ethylene. |