| abstract |
Disclosed is a battery packaging material in which a decrease in resistance to electrolytic solution is effectively suppressed even when drawn at a high draw ratio. [Solution] At least comprising a laminate comprising a base material layer, a barrier layer, an adhesive resin layer, and a heat-fusible resin layer in order from the outside, The adhesive resin layer is made of a cured product of a thermosetting modified polyolefin resin, When the laminate is stretched in a direction perpendicular to the thickness direction at a stretch ratio of 150%, the value of the brightness difference ΔL measured from the heat-fusible resin layer side of the laminate before and after the stretching is 35 or less. A battery packaging material. [Selection figure] None |