| abstract |
An object of the present invention is to provide a packaging material for a battery comprising at least a film-like laminate in which a base layer, an adhesive layer, a metal layer and a sealant layer are sequentially laminated, wherein cracks and pinholes are less likely to occur during molding, To provide the technology to make. A packaging material for a battery comprising at least a laminate in which a base layer, an adhesive layer, a metal layer and a sealant layer are sequentially laminated, wherein the metal layer has a 0.2% proof stress when subjected to a tensile test in a direction parallel to the rolling direction, By using an aluminum foil of 121 N / mm 2, it is possible to provide the battery packaging material with remarkably excellent formability, and the occurrence rate of pinholes and cracks at the time of molding can be greatly reduced. |