Filter media with irregular structure and/or reversibly stretchable layers

US11420143B2 · kind B2 · utility

Assignee

• Hollingsworth & Vose Company · US

Inventors

• Bruce Smith · Copper Hill, US
• Mohammad A. Hassan · Roanoke, US
• Maxim Silin · Hudson, US
• Sudheer Jinka · Pelham, US
• Greg Wagner Farell · Radford, US
• David T. Healey · Bellingham, US

Key dates

• Filing date: May 4, 2020
• Grant date: Aug 23, 2022
• Expiry date: May 4, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2239/083
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.