| 摘要 |
PROBLEM TO BE SOLVED: To provide an exterior material for power storage device capable of improving the seal characteristics involved in an electrolyte including the degassing heat seal strength, while suppressing occurrence of excess seal part and occurrence of molding whitening.SOLUTION: In an exterior material for power storage device having a structure where at least a base material layer, a first adhesive layer, a metal foil layer where a corrosion prevention processing layer is provided on one or both sides, a second adhesive layer or an adhesive resin layer, and a sealant layer are laminated in this order, the sealant layer is a layer formed of a resin composition containing (A) 60-95 mass% of propylene-ethylene random copolymer, and (B) 5-40 mass% of polyolefin-based elastomer having a melting point of 150°C or less where butene-1 is a comonomer.SELECTED DRAWING: Figure 1 |
