Flexible air permeable non-woven fabric filters

Details Flexible air permeable non-woven fabric filters Flexible air permeable non-woven fabric filters

1984-01-09

1985-09-10

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

2 2, 2243A, 55524, 55527, 55528, 264 23, 264233, 427 57, 428244, 428288, 428297, 4283115, 4283177, 4283179, 428323, 428329, 428331, 428372, 428408, 428902, D04H 140, D04H 172

Patent

active

045406251

ABSTRACT:
A flexible, air permeable composite highly effective as a highly absorbent fiber filter, suitable for high throughput, low pressure drop applications. The composites and filters use a non-woven fabric substrate, in conjunction with organic polymer fibers, such as polypropylene fibers, formed in-situ from a solvent solution of the polymer, with solid particles such as carbon particles interstitially positioned within the mass, and forming a unique microstructure by the interaction of the flexible non-woven fibers and the polymer fibers. A method of entrapping small sorptive particles within such filters is also provided.

REFERENCES:
patent: 3971373 (1976-07-01), Braun
patent: 4127624 (1978-11-01), Keller et al.
patent: 4296166 (1981-10-01), Ogino
patent: 4396663 (1983-08-01), Mitchell
patent: 4397907 (1983-08-01), Rosser
patent: 4411948 (1983-10-01), Ogino
patent: 4429001 (1984-01-01), Kolpin
patent: 4433024 (1984-02-01), Eian

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