Processes for preparing electret filters

Details Processes for preparing electret filters Processes for preparing electret filters

1989-01-12

1992-09-01

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including grain, strips, or filamentary elements in...

55521, 55525, 55528, 156209, 1563082, 264 22, 428172, 428174, 428195, 428198, 428236, 428255, 428288, 428296, 428302, B32B 526, B32B 710, B32B 3108, B32B 3120

Patent

active

051437678

ABSTRACT:
Provided herein is a process for preparing an electret filter which comprises feeding a non-woven fabric composed of an electrically charged web of synthetic fibers through a nip of co-operating embossing and flat rolls under pressure and at a temperature below a softening temperature of said synthetic fibers, thereby subjecting the surface of said non-woven fabric to partical fusion bonding and integration.

REFERENCES:
patent: 4302495 (1981-11-01), Marra
patent: 4363682 (1982-12-01), Thiebault
patent: 4601937 (1986-07-01), Latussek
patent: 4851277 (1989-07-01), Valkenberg et al.
patent: 4874659 (1989-10-01), Ando et al.

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