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US 6,579,350 B2Granted
Air laid/wet laid gas filtration media
AssigneeLydall, Inc.
InventorJoseph P. Doherty
Life of this patent
Estimating the term…
Abstract
A pleatable high efficiency non-woven, gas filtration media is provided. The media has an electrically charged air laid fibrous layer with a thickness between about 2 and about 35 mils, and a wet laid fibrous layer having a thickness of between about 5 and about 35 mils. The combined layers have, (a) a thickness of between about 10 and about 50 mils, (b) a stiffness of between about 200 and about 3500 mgs, (c) a Frazier of between about 10 and about 400 CFM, and (d) an α of at least 15.
Claims22
A pleatable high efficiency non-woven, gas filtration media, comprising:
- (1) an electrically charged air laid fibrous layer having a thickness between about 2 and about 35 mils;
- (2) a wet laid fibrous layer having a thickness of between about 5 and about 35 mils;
- and
- wherein the combined layers have, (a) a thickness of between about 10 and about 50 mils, (b) a stiffness of between about 200 and about 3500 mgs, (c) a Frazier of between about 10 and about 400 CFM, and (d) an α of at least 15.
1 more element
Dependencies are inferred from the claim text.