摘要 |
PROBLEM TO BE SOLVED: To provide a co-extruded composite film excellent in odor characteristics, pinhole resistance or the like and preferable for packaging of liquid beverage such as mineral water, juice or the like. SOLUTION: A composite film is composed of an outermost layer of a polyamide resin layer, an interlayer composed of an ethylene-vinyl acetate copolymer saponified substance layer and an innermost layer of heat-seal resin layer composed of a polyethylene resin layer without an additive. A total thickness of the film is 60-200μm. A thickness of the ethylene-vinyl acetate copolymer saponified substance layer is 5-20μm. And the film is formed by a co-extruding water- cooling inflation.
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