High efficiency breathing mask fabrics

Details High efficiency breathing mask fabrics High efficiency breathing mask fabrics

1995-12-22

1998-10-06

Bell, James J.

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Nonwoven fabric

Including strand or fiber material which is of specific...

12820621, 428903, 442351, 442361, 442362, 442364, 442373, 442382, 442414, A62B 1802

Patent

active

058175849

ABSTRACT:
A breathing mask fabric is provided which has between 50 and 95 weight percent of a through-air bonded, electret treated, nonwoven microfiber first web of fibers where the fibers have an average diameter of between about 10 and 25 microns and where the first web has a Frazier Permeability above about 100 CFM/SF, a density of between about 0.015 and 0.15 gms/cc, and a basis weight between about 67 gsm and about 340 gsm, and between about 5 and 50 weight percent of an electret treated microfiber second web of fibers where the fibers have an average diameter of less than about 10 microns.

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