| 摘要 |
PROBLEM TO BE SOLVED: To prevent a crack, a pinhole, local thickness, irregularity, etc., while obtaining high gas barrier properties by laminating a specific ethylene/vinyl alcohol copolymer resin layer and a polypropylene resin layer wherein an isotactic bond is a specific ratio through an adhesive resin layer. SOLUTION: An ethylene/vinyl alcohol copolymer resin (EVOH resin) A layer with an ethylene content of 20-60 mol% and a saponification value of 90% or more and a polypropylene resin (PP resin) C layer wherein an isotactic bond is 95% or more in pentad display are laminated through an adhesive resin B layer. As the EVOH resin, a resin compsn. comprising two or more kinds of ethylene/vinyl alcohol copolymers having different melting points is pref. As the adhesive resin B, a carboxylic acid modified polyolefinic resin is pref. from a viewpoint of adhesiveness. The PP resin C pref. has a melt flow rate at 230 deg.C under load of 2.160 g of 0.1-100 g/10 min.
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