Filtration media especially useful for filtering fluids associated with wire electron discharge machining (WEDM) processes

US12134053B2 · kind B2 · utility

Assignee

• AHLSTROM OYJ · FI

Inventors

• Jesse SHIM · Jungni-dong, KR
• Melissa KANG · Jungni-dong, KR
• Jun Young Kim · Seoul, KR
• Xiling Zeng · Shanghai, CN
• Kauter LIU · Binzhou, CN

Key dates

• Filing date: Apr 16, 2019
• Grant date: Nov 5, 2024
• Expiry date: Jan 30, 2042

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2239/1291
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Fibrous filtration media and methods of making and using the same are provided whereby the media includes a wet-laid nonwoven fibrous web having from about 20 wt. % to about 80 wt. %, based on total weight of fibrous web, of bicomponent staple fibers, and from about 10 wt. % to about 50 wt. %, based on total weight of the fibrous web, of fibrillated lyocell staple fibers. The fibrous web exhibits a wet burst strength of greater than 3 bar, for example between about 3 bar to about 6 bar and is especially suitable for use in filtering process fluids (e.g., water) associated with wire electron discharge machining (WEDM).