Patent ID: 11923500
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC H

Claim 16:
17. A battery packaging material formed of a laminate in which at least a base material layer, a metal layer, and a sealant layer are laminated in this order,
the base material layer having a thickness of 25 μm or less, and
the laminate satisfying the relationship of A+B≥2.50, where A+B is a sum of a value A of a ratio of a stress in elongation by 40% to a stress in elongation by 10% in the MD direction and a value B of a ratio of a stress in elongation by 40% to a stress in elongation by 10% in the TD direction.