| abstract |
At least the base material layer, the metal layer, and the sealant layer, the laminate comprises a laminated body sequentially, the laminate is a value A of the stress at 10% elongation at 40% elongation in the MD direction and the TD direction The battery packaging material in which the sum (A + B) of the value B of the stress at 40% elongation / 10% of the stress at elongation (A + B) satisfies the relationship of A + B ≧ 2.50. |