Title:
MELT BLOWN COMPOSITE HEPA VACUUM FILTER
Document Type and Number:
WIPO Patent Application WO2001068658
Kind Code:
A3
Abstract:
An electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration challenges without significant decay in alpha values over time. Preferred charge additives include fatty acid amides and mixtures thereof.
Inventors:
COX STEPHEN T
HEALEY DAVID T
HEALEY DAVID T
Application Number:
PCT/US2001/007800
Publication Date:
March 21, 2002
Filing Date:
March 12, 2001
Export Citation:
Assignee:
HOLLINGSWORTH & VOSE CO (US)
International Classes:
B01D39/16; B01D46/02; (IPC1-7): B01D39/16
Foreign References:
| US4215682A | 1980-08-05 | |||
| US5645627A | 1997-07-08 |
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