| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging material for battery case where a heat-resistant stretched resin film, an adhesive, an aluminum foil, and a thermoplastic non-stretched resin film are laminated, in which an aluminum foil is not cracked even if it is subjected to deep drawing or stretching, and delamination does not occur after deep drawing or stretching.SOLUTION: The first adhesive layer of a packaging material for battery case, having a structure where a heat-resistant stretched resin film, an adhesive layer, an aluminum layer, and a thermoplastic non-stretched resin layer are laminated, is composed of a hardened stuff of an adhesive composition containing a polyester resin exhibiting a glass transition temperature between -20°C and 45°C, and 10-70 pts.mass of toluene diisocyanate-based hardener for 100 pts.mass of polyester resin. A stretched polyamide film is preferable as the heat-resistant stretched resin film, and a non-stretched polyolefin film is preferable as the thermoplastic non-stretched resin layer. |
