| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging material for a battery excellent in productivity, low temperature sealing performance, sealing performance, and resistance to contents while adhesion strength between a metal foil layer and a heat seal layer is ensured in a laminate laminated by a dry lamination method. SOLUTION: The packaging material for the battery is formed by laminating in order at least a substrate layer 12 of the outermost layer, a barrier layer made of aluminum foil, a chemical conversion treatment layer 13a, a fluororesin layer 8, and a heat seal layer of the innermost layer, and the heat seal layer 14 comprises at least a first polypropylene layer and a second polypropylene layer, the second polypropylene layer is arranged on the innermost layer side than the first polypropylene layer, and the second polypropylene layer has lower melting point and higher melt index than the first polypropylene layer. COPYRIGHT: (C)2008,JPO&INPIT |
