| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate excellent in shutdown function and strength, its manufacturing method and a secondary cell using the laminate. SOLUTION: The laminate comprises a base material layer and the closure layer laminated at least on one side of the base material layer. The base material layer has a large number of through-holes and contains a plastic A while the closure layer has a large number of through-holes and contains a plastic B and a foaming agent. Further, the plastic B has a softening temperature lower than that of the plastic A and the foaming agent is expanded at a predetermined temperature or above. COPYRIGHT: (C)2006,JPO&NCIPI |
