CHARGING OF FILTER MEDIA
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United States of America Patent
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Issued Date -
Jul 4, 2013
app pub date -
Dec 29, 2011
filing date -
Dec 29, 2011
priority date (Note) -
Abandoned
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Abstract
Methods and systems for charging fiber webs, including those suitable for use as filter media, are provided. In some embodiments, the methods provided herein involve charging a fiber web by passing a substance through the web under suitable conditions to produce a charged article. The substance may be, for example, a substantially non-polar liquid or gas, a compressed fluid, and/or a supercritical fluid (e.g., carbon dioxide). In some embodiments, the method of charging includes releasing the substance from a container, passing the substance through the fiber web, and, optionally, drawing the substance into a vacuum apparatus after it passes through the fiber web.
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