Title:
METHOD OF MAKING AN ELECTRET
Document Type and Number:
WIPO Patent Application WO2003023796
Kind Code:
A3
Abstract:
A method of making an electret that includes contacting a porous substrate that includes polymer with a composition that includes solvent capable of swelling the polymer, removing the solvent from the substrate, and contacting the substrate with water in a manner sufficient to impart an electret charge to the substrate.
Inventors:
CHOU SHIH-HUNG
WU TIEN TSUNG
MEI BETTY Z
SCHABERG MARK S
BUCCELLATO GINA M
ELSBERND CHERYL L S
GUERRA MIGUEL A
WU TIEN TSUNG
MEI BETTY Z
SCHABERG MARK S
BUCCELLATO GINA M
ELSBERND CHERYL L S
GUERRA MIGUEL A
Application Number:
PCT/US2002/025422
Publication Date:
June 17, 2004
Filing Date:
August 12, 2002
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
B01D39/16; D06B19/00; D04H1/56; D04H3/16; D06C29/00; D06M11/05; D06M13/02; D06M13/358; D06M23/06; D06M23/10; H01G7/02; (IPC1-7): H01G7/02
Domestic Patent References:
| WO2001007144A2 | 2001-02-01 |
Foreign References:
| US6123752A | 2000-09-26 | |||
| US6110588A | 2000-08-29 | |||
| US4588537A | 1986-05-13 | |||
| US6030906A | 2000-02-29 | |||
| US4734227A | 1988-03-29 | |||
| EP1126072A2 | 2001-08-22 | |||
| US4650506A | 1987-03-17 | |||
| US6237595B1 | 2001-05-29 | |||
| US5906743A | 1999-05-25 |
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