US Patent:
20060096911, May 11, 2006
Inventors:
Larry Brey - Woodbury MN, US
Andrew Viner - Roseville MN, US
Marvin Jones - Grant MN, US
John Trend - St. Paul MN, US
Raymond Senkus - Hudson WI, US
Mary Senkus - Hudson WI, US
Thomas Insley - Lake Elmo MN, US
International Classification:
B32B 5/16
B32B 5/26
D04H 1/00
D04H 1/56
B01D 24/00
US Classification:
210500100, 442417000, 442328000, 442414000, 442381000, 442400000, 210505000, 210503000, 264103000, 264129000, 264555000
Abstract:
A porous sheet article comprising a self-supporting nonwoven web of polymeric fibers and at least 80 weight percent sorbent particles enmeshed in the web, the fibers having sufficiently greater elasticity or sufficiently greater crystallization shrinkage than similar caliper polypropylene fibers and the sorbent particles being sufficiently evenly distributed in the web so that the web has an Adsorption Factor A of at least 1.6×10/mm water. The articles have low pressure drop and can provide filter elements having long service life and an Adsorption Factor approaching and in some instances exceeding that of a packed carbon bed.