| abstract |
【Task】 A battery packaging material in which curling after molding is effectively suppressed is provided. [Solution] It consists of a laminate in which at least a base material layer, a metal layer, and a sealant layer are sequentially laminated, The stress at 10% elongation in the MD direction of the laminate is A1, and the stress at 10% elongation in the TD direction is B1, When the stress at 10% elongation in the MD direction of the base material layer is A2, and the stress at 10% elongation in the TD direction is B2, (A1-A2) ≧ 60 N / 15 mm and (B1-B2) ≧ 50 N / 15 mm Battery packaging material that satisfies this relationship. [Selection figure] None |