Method of manufacturing an electret film
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United States of America Patent
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Jul 15, 2014
Grant Date -
Oct 1, 2009
app pub date -
Apr 13, 2009
filing date -
Mar 10, 2008
priority date (Note) -
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Abstract
A method of making a nonfluoropolymer electret film is provided. The method may include: providing a polymer-containing solution, the polymer-containing solution comprising at least one polymer material, at least one solvent, and at least one surfactant, spreading the polymer-containing solution to provide a wetting polymer film, removing at least a portion of the solvent in the wetting polymer film to provide a polymer film, and conducting a Corona charging to the polymer film to form the electret film.
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