Donaldson Comapny, Inc.

Stuti S Rajgarhia

Andrew J Dallas

Bradly G Hauser

Davis B Moravec

Joseph M Block

Aflal Rahmathullah

Charles S Christ

Vijay K Kapoor

Stephen K Sontag

Daniel Eric Adamek

Brian Edward Tucker

Paul Anthony Way

Matthew P Goertz

Wijadi Jodi

Richard Brandimarte

Timothy O Winters

William S Rossiter

Scott A Betcher

Colter A Marcks

Robert J Pannepacker, Jr

Anil Suthar

A porous polytetrafluoroethylene (PTFE) membrane including a nonwoven web having a microstructure of substantially only microfibrils fused at crossover points, said membrane having a percent balance of orthogonal dimensions that is within 10%.

Porous PTFE membrane

The current technology relates to filter media configurations where the filter media has a surface with a treatment that increases the roll off angle of the surface for a 50 μL water droplet when the surface is immersed in toluene. Some example filter media have a fluted configuration, and some example filter media have multiple layers. Filter media having multiple layers can be single facer media, for example, where one layer is planar and another layer is fluted.

Filter media configurations

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.

Hydrocarbon fluid-water separation

Growing community of inventors

Bloomington, MN, United States of America

Stuti S Rajgarhia