Method of producing an electrically charged film
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United States of America Patent
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-
Jan 25, 2005
Grant Date -
Mar 13, 2003
app pub date -
Sep 7, 2001
filing date -
Sep 7, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of producing an electrically charged film includes the steps of forming a molten thermoplastic material into a web, electrically charging the web while the web is at a temperature substantially at or above a solidification temperature thereof, cooling the web below the solidification temperature thereof after charging and winding the web into individual rolls immediately following the cooling step.
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