| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate film for battery outer packaging having high seal strength and interlayer adhesive strength, excellent heat resistance and electrolyte resistance, and less environmental load, and capable of being produced at an inexpensive cost.SOLUTION: Disclosed is a laminate film 10 for battery outer packaging formed by laminating at least a protective layer 1, a first adhesive layer 2, a metal foil 3 containing at least aluminum, a second adhesive layer 4, and a sealant layer 5 in this order. On the surface on the side in contact with the second adhesive layer 4 of the metal foil 3, a boehmite coating film is formed whose contact angle with water is 5° or more and 70° or less. The second adhesive layer 4 contains at least acid modified polyolefin resin, and the metal foil 3 and the second adhesive layer 4 are stuck to each other by a heat lamination method. |
