| abstract |
Disclosed is a battery packaging material that is excellent in low-temperature sealing properties, hermetic sealing properties, and resistance to contents even in a laminate laminated by any one of a thermal lamination method and a dry lamination method. A battery packaging in which a base layer 12 as an outermost layer, a barrier layer 13 made of aluminum foil, a chemical conversion layer 13a, an adhesive layer 8, and a heat seal layer 14 as an innermost layer are laminated at least in order. In the material, the heat seal layer 14 is composed of at least a first polypropylene layer and a second polypropylene layer, the second polypropylene layer is disposed on the innermost layer side of the first polypropylene layer, and has a low melting point and a high melt index. . [Selection] Figure 1 |