Title:
HYDROENTANGLED FILTER MEDIA WITH IMPROVED STATIC DECAY AND METHOD
Document Type and Number:
WIPO Patent Application WO2004037372
Kind Code:
A3
Abstract:
The present invention is directed to a filter media comprised of an electro-conductive scrim so as to improve on the dissipation time of an electrostatic charge. Further, the present invention is directed to a method of making such a filter media, which is formed through hydroentanglement of a precursor web (P) with high pressure water jets from manifolds (22) while the precursor web (P) rests on a foraminous surface (18), thus deleterious effects of mechanical needling, while providing a filter media having the requisite strength characteristics, without possessing a limiting factor in performance.
Inventors:
HARTGROVE HERBERT
MCNAULL CYNTHIA DAWSON
TINDALL RUSSELL
MCNAULL CYNTHIA DAWSON
TINDALL RUSSELL
Application Number:
PCT/US2003/033393
Publication Date:
July 01, 2004
Filing Date:
October 21, 2003
Export Citation:
Assignee:
POLYMER GROUP INC (US)
International Classes:
B01D39/16; B01D46/00; B01D46/02; B32B5/02; B32B5/26; D04H13/00; D04H18/04; (IPC1-7): B32B31/00; D04H1/46; D04H18/00
Foreign References:
| US4556601A | 1985-12-03 | |||
| US4983434A | 1991-01-08 | |||
| US5298315A | 1994-03-29 | |||
| US6171369B1 | 2001-01-09 |
Other References:
See also references of EP 1556216A4
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