Hydrocarbon fluid-water separation
AssigneeDonaldson Company, Inc.
InventorsBradly G. Hauser, Stephen K. Sontag, Davis B. Moravec, Stuti S. Rajgarhia, Andrew J. Dallas, Vijay K. Kapoor, Aflal Rahmathullah, Charles S. Christ, Joseph M. Block
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Abstract
A substrate for use in a filter media including, for example, in a hydrocarbon fluid-water separation filter; methods of identifying the substrate; methods of making the substrate; methods of using the substrate; and methods of improving the roll off angle of the substrate. In some embodiments, the substrate includes a hydrophilic group-containing polymer or a hydrophilic group-containing polymer coating.
Claims20
A filter media comprising a substrate,
- wherein the substrate comprises a surface having a roll off angle in a range of 40 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene;
- wherein the substrate comprises pores having an average diameter of at least 20 μm;
- and
- wherein the surface comprises UV-treated resin.
A filter media comprising a substrate, wherein the substrate comprises a surface having a roll off angle in a range of 40 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene;
- wherein the substrate comprises pores having an average diameter of at least 20 μm;
- and wherein the surface is formed by subjecting a resin to UV radiation in the presence of hydrogen peroxide.
A filter media comprising a substrate, wherein the substrate comprises a surface having a roll off angle in a range of 40 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene;
- wherein the substrate comprises pores having an average diameter of at least 20 μm;
- and wherein the surface comprises an electrospun coating comprising hydrophilic groups.
A filter media comprising a substrate, wherein the substrate comprises a surface having a roll off angle in a range of 40 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface is immersed in toluene;
- wherein the substrate comprises pores having an average diameter of at least 20 μm;
- and wherein the substrate comprises an electrostatic-spray coated surface containing hydrophilic groups.
Dependencies are inferred from the claim text.