| 摘要 |
PROBLEM TO BE SOLVED: To provide a separator for a lead storage battery sufficiently satisfying battery characteristics, having a rib mainly made of polyolefin resin on one side or both sides, of which, lowering of oxidation resistant property and productivity are restrained, and falling down and deformation are prevented. SOLUTION: At least a rising part of a rib of a separator for a lead storage battery is formed into a shape of concave surface spreading downwards.
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