ELECTRET AND ELECTRET FILTER
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United States of America
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Issued Date -
Feb 20, 2025
app pub date -
Nov 22, 2022
filing date -
Nov 22, 2022
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Abstract
The electret of the present invention comprises: inorganic particles and a dispersant in a polyolefin resin; and a nitrogen-containing compound, wherein a value of a/b is 0.3 or smaller when a represents a maximum value of a depolarizing current at 50 to 100° C. as measured by a TSC method, and b represents a maximum value of a depolarizing current at 100° C. or higher as measured by the TSC method.
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