Back to results
US 2014/0360146 A1Published application
Wet-laid dual-layer air filtration media including a large diameter synthetic polymeric fiber in a top layer thereof
AssigneeLydall, Inc.
InventorsWilliam H. Cambo, Stephen Edward Gross
Life of this patent
Estimating the term…
Abstract
A wet-laid dual-layer air filtration media having a thin, lightweight top layer and a bottom layer is provided. The novel media includes a large diameter synthetic polymeric fiber in the top layer that deforms plastically and retains cohesion as a single object, while minimizing use of frangible components that become airborne upon handling. The novel media provides improved high dust holding capacity, while typically maintaining an overall lower basis weight than heretofore available media.
Claims17
A wet-laid dual-layer gas filtration media, comprising:
- a top layer, said top layer comprising about 2-100 wt. % synthetic polymeric fiber, wherein the synthetic polymeric fiber is a polymer material that deforms plastically and retains cohesion as a single object, and wherein the diameter of the synthetic polymeric fiber is about 6-50 microns;
- and
- a bottom layer,
- wherein the media has a basis weight of about 38-50 lbs./3000 ft2 and a dust holding capacity of at least about 34 g/m2 at about a 38% DOP penetration, the top layer has a basis weight of about 5-20% of the media basis weight and is configured with minimal frangible components that become airborne upon handling.
1 more element
A wet-laid dual-layer gas filtration media, comprising:
- a top layer, said top layer comprising synthetic polymeric fiber, wherein the synthetic polymeric fiber is a polymer material that deforms plastically and retains cohesion as a single object, and wherein the diameter of the synthetic polymeric fiber is about 6-50 microns;
- and
- a bottom layer,
- wherein the media has a basis weight of about 38-50 lbs./3000 ft2 and a dust holding capacity of at least about 34 g/m2 at about a 38% DOP Penetration, the top layer has a basis weight of about 1-20% of the media basis weight and is configured with minimal frangible components that become airborne upon handling, the media comprising sufficient non-synthetic polymeric fiber in the top layer to pass a flammability test.
1 more element
Dependencies are inferred from the claim text.