Porous, nonwoven liquid-activated barrier

Details Porous, nonwoven liquid-activated barrier Porous, nonwoven liquid-activated barrier

1994-05-16

1995-09-05

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428221, 428224, 428286, 428288, 428296, 428297, 428298, 4283044, 4283084, B32B 2700

Patent

active

054477883

ABSTRACT:
A porous, nonwoven liquid-activated barrier which includes a fibrous nonwoven web in which at least about 50 percent by weight of the fibers constituting the fibrous nonwoven web are prepared from a liquid-swellable polymer which is not significantly soluble in the liquid. In addition, the fibers of the fibrous nonwoven web have diameters in a range of from about 0.1 to about 100 micrometers. The pores of the fibrous nonwoven web have a longest dimension in a range of from about 0.3 to about 300 micrometers. In the presence of liquid, the fibers swell to an extent sufficient to substantially block the passage of liquid through the fibrous nonwoven web. In many instances, the liquid will be water.

REFERENCES:
patent: 3654929 (1972-04-01), Nilsson et al.
patent: 3888256 (1975-06-01), Studinger
patent: 4592751 (1986-06-01), Gegelys
patent: 4846813 (1989-07-01), Raley
patent: 4855179 (1989-08-01), Bourland et al.
patent: 5016952 (1991-05-01), Arroyo et al.
patent: 5213881 (1993-05-01), Timmons et al.
patent: 5342335 (1994-08-01), Rhim

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