| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheath material for power storage device improved in insulation after molding and sealability to which an electrolyte is related, including a degassing heat seal strength.SOLUTION: The sheath material for power storage device has a structure in which at least a substrate layer, a first adhesive layer, a metal foil layer with which anti-corrosive treatment layers are provided on one or both surfaces, a second adhesive layer or an adhesive resin layer and a sealant layer are laminated in this order. The sealant layer includes a layer formed from a resin composition containing (A) propylene-ethylene random copolymer in 60 to 95 mass%, (B) compatible elastomer and/or (C) incompatible elastomer totally in 5 to 40 mass%. In the resin composition, a mass ratio of a content of (C) incompatible elastomer with respect to a content of (B) compatible elastomer is 0 to 1, and (B) compatible elastomer and (C) incompatible elastomer have a common comonomer component.SELECTED DRAWING: Figure 1 |
