Air filtration media, media constructions and methods

摘要

The present invention is directed, in part, to air filtration media, air filtration media packs, air filtration elements, and methods of making air filtration media, media packs, and filtration elements. The air filtration media typically has a fiber composition that is primarily cellulose fibers, the media having a low solidity and low basis weight and being suitable for forming of structured flutes into the media. In certain embodiments a resin is added such as a solvent based resin.

主权项

1. A cleaner for removing contaminants from a gas stream, the cleaner comprising:
(a) a housing configured to retain an air filtration media pack; and (b) an air filtration media pack, the media pack comprising:
(i) a plurality of layers of single facer media wherein the layer of single facer media comprising a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing;(ii) a first portion of the plurality of flutes being closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes being closed to unfiltered air flowing out of the second portion of the plurality of flutes so that air passing into one of the first face or the second face of the media pack and out the other of the first face or the second face of the media pack passes through media to provide filtration of the air; and(iii) wherein the fluted sheet comprises:
(a) a plurality of repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet, said plurality of internal and external peaks comprising sharp contact points with adjacent facing sheets;(b) an air filtration media layer, the air filtration media layer comprising a fiber composition wherein at least 80 percent of the fibers by weight are cellulose fibers; and wherein the air filtration media layer has:a solidity of less than 20 percent, anda basis weight of less than 45 pounds per 3000 square feet.