| 摘要 |
PROBLEM TO BE SOLVED: To provide a separator for a zinc halogen battery with excellent heat resistance and electric characteristics. SOLUTION: The separator consists of polyethylene of viscosity-average molecular weight of 50 thousand or more and less than 350 thousand and fine powder silica, of which, molecular weight distribution (Mw/Mn) of polyethylene is 8 or less and partial rate of polyethylene at a film surface not including the cut surface of the separator is 30% or more and 75% or less.
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