ELECTRET AND PROCESS FOR ITS PRODUCTION, AND ELECTROSTATIC INDUCTION-TYPE CONVERSION DEVICE
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United States of America Patent
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app pub date -
Jan 15, 2014
filing date -
Jul 28, 2011
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Abstract
An electret having an electric charge injected to a laminate having a resin layer (A) and a resin layer (B) laminated directly on the resin layer (A), wherein the resin layer (A) contains a reaction product of a fluorinated polymer with a silane coupling agent, the resin layer (B) does not contain a reaction product of a fluorinated polymer with a silane coupling agent and contains a fluorinated polymer, the resin layer (B) is disposed as the outermost layer so as to be in contact with air, and the total thickness of the resin layer (B) is from 5 to 55% of the total thickness of the resin layer (A); and an electrostatic induction-type conversion device provided with the electret.
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