| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging material for lithium ion battery, having a battery content resistance (electrolytic solution resistance or hydrofluoric acid resistance), while avoiding the occurrence of whitening in a sealant layer and an adhesive resin layer, when cold-molding the laminate film type packaging material using an aluminum foil to form recessed portions.SOLUTION: In the packaging material for the lithium ion battery, at least an adhesive layer 12, an aluminum foil layer 13, an aluminum protection later 14, the adhesive resin layer 15 and the sealant layer 16 are laminated, in sequence, on one face of a substrate layer 11. Into the sealant layer 16, an elastomer is added which consists of fine particles having an average particle size of 200 nm or smaller. |
