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

Claim 0:
1. A battery packaging material formed of a laminate in which at least a polyester resin layer, a polyamide resin layer, an aluminum metal foil layer, an adhesive layer, and a sealant layer are laminated in this order,
the aluminum metal foil layer having a thickness greater than 50 μm, 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.