| 摘要 |
[Problem] To provide a battery case packaging material for cold molding, in which a biaxially-stretched polybutylene terephthalate film is used as a base layer and/or a barrier material reinforcing layer, whereby it becomes possible to produce a packaging material for cold molding, particularly a packaging material for a battery such as a lithium ion secondary battery, which contains a biaxially-stretched polybutylene terephthalate film that does not lose acid resistance or moisture-proof properties and maintains excellent cold-moldability, and therefore has excellent moisture-proof properties, acid resistance and cold moldability. [Solution] A battery case packaging material for cold molding, comprising a barrier layer and a sealant layer laminated in this order, or comprising a base layer, a barrier layer, a barrier material reinforcing layer and a sealant layer laminated in this order, wherein a biaxially-stretched polybutylene terephthalate film is used as the base layer and/or the barrier material reinforcing layer. |
