Gradient nanofiber filter media

US10953356B2 · kind B2 · utility

Assignee

• Cummins Filtration IP, Inc. · US

Inventors

• William C. Haberkamp · Cookeville, US
• Eric A. Janikowski · Jefferson, US
• Barry M. Verdegan · Stoughton, US
• Christopher E. Holm · Madison, US
• Huanling Liu · Cookeville, US
• Kyle Ellison · Hermitage, US
• Mark T. Wieczorek · Cookeville, US

Key dates

• Filing date: Dec 16, 2019
• Grant date: Mar 23, 2021
• Expiry date: Dec 16, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2239/125
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is a composite filter media. The composite filter media is formed from multiple layers of media material including a nanofiber media layer, where the layers are laminated, bound, or otherwise composited to each other. The composite filter media can comprise at least one nanofiber layer comprising polymeric media material having a geometric mean fiber diameter of about 100 nm to 1 μm, and fibers configured in a gradient such that ratio of the geometric mean diameter of fibers at the upstream face of the nano fiber layer to the geometric mean diameter of fibers at the downstream face of the nano fiber layer is about 1.1 to 2.8, preferably about 1.2 to 2.4.