| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorine ion exchange resin film of low dry weight (EW) per one equivalent weight, being excellent in durability, which is used for a fuel cell. SOLUTION: The dry weight (EW) per one equivalent weight of ion exchange group is 250-940, while decrease in weight after boiling process for eight hours under water is 5 wt.% or less according to a dry weight reference before boiling process. |
