| 摘要 |
PROBLEM TO BE SOLVED: To advance moisture resistance, a sealing property, mechanical strength, and the like by forming the outermost layer of a nylon and the innermost layer of polyethylene having a heat sealing property, and also forming the intermediate layer of a multilayer composite film having an arrangement of aluminum and a polyester. SOLUTION: The outermost layer is formed of a nylon 1, and also the innermost layer is formed of polyethylene 2 having a heat sealing property, and further the intermediate layer is made into a multiple layer composite film structural body through a lamination of aluminum 3, a nylon, or a polyester 4. A nylon film consisting of the nylon is preferable since a 6-nylon film and 6,6-nylon film corresponds to impact resistance and moisture resistance, and its film thickness is suitable to be 10-30μm ordinarily. The average film thickness of a polyethylene film is usually made 40-100μm. Aluminum is essential in terms of moisture resistance, and its average film thickness is suitably in the order of 5-30μm, and also the average film thickness of the nylon or polyester is desirably of the order of 10-30μm. |
