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US 2019/0336897 A1Published application
Filter media and elements
AssigneeDonaldson Company, Inc.
InventorsQiong Gao, Gregory S. Tronnes, Rakesh Kumar Yadav, Michael A. Madden
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Abstract
Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
Claims20
An air filter medium comprising:
- a melt-blown filter layer comprising melt-blown fibers;
- and
- a high-efficiency glass-containing filter layer comprising glass fibers and multi-component binder fibers;
- and
- a support layer,
- wherein the melt-blown filter layer or the support layer or both the melt-blown filter layer and the support layer are hydrophobic;
- wherein the layers are configured and arranged for placement in an air stream.
4 more elements
A filter medium comprising:
- a melt-blown filter layer comprising melt-blown fibers having an average diameter of greater than 1.5 microns;
- a high-efficiency glass-containing filter layer comprising glass fibers having an average diameter of less than 2 microns, and multi-component binder fibers;
- and
- an optional support layer;
- wherein the melt-blown filter layer is the most upstream layer;
- and wherein the filter medium is watertight.
3 more elements
A filter element, wherein the filter element comprises a media pack comprising a filter medium, wherein the filter medium comprises:
- a melt-blown filter layer comprising melt-blown fibers;
- and
- a high-efficiency glass-containing filter layer comprising glass fibers and multi-component binder fibers;
- and
- an optional support layer;
- wherein the melt-blown filter layer is the most upstream layer and the glass-containing layer is positioned adjacent to the melt-blown layer,
- wherein the filter element comprises a cylindrical element comprising the media pack.
4 more elements
Dependencies are inferred from the claim text.