METHOD FOR PRODUCING SEPARATOR AND APPARATUS FOR PRODUCING SEPARATOR
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United States of America Patent
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Issued Date -
Oct 29, 2020
app pub date -
Apr 24, 2020
filing date -
Apr 25, 2019
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Abstract
An extremely small defect, in particular, a recess having been produced in a separator is easily detected. A separator is subjected to a withstand voltage inspection carried out for detecting a defect in the separator, the separator including (i) a base material and (ii) a functional layer that is provided to at least one of surfaces of the base material.
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