| 摘要 |
PROBLEM TO BE SOLVED: To provide an outer package material for a lithium ion battery, excellent in electrolyte resistance, specifically acid resistance, on a base material layer side, and also excellent in formability.SOLUTION: An outer package material 1 for a lithium ion battery comprises an acid resistance imparting layer 12A, a third adhesive layer 18, a base material layer 11, a first adhesive layer 13, an aluminum foil layer 14, an anti-corrosion treated layer 15, a second adhesive layer 16 and a sealant layer 17, which are sequentially laminated. The base material layer 11 is made of a stretched polyamide film base material, the acid resistance imparting layer 12A is made of a stretched polyester base material, the ratio (A/B) between the thickness A of the acid resistance imparting layer 12A and the thickness B of the base material layer 11 is 0.04-0.8, and the coefficient of static friction on the outside surface of the acid resistance imparting layer 12A and the coefficient of static friction on the outside surface of the sealant layer 17 are controlled to 0.25 or less and to 0.50 or less, respectively, by at least one of a slip agent and an antiblocking agent. |
