Electret webs with charge-enhancing additives

US8529671B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• John M. Sebastian · Maplewood, US
• Fuming B. Li · Woodbury, US
• Marvin E. Jones · Elbow Lake, US
• Luke T. Dressel · Somerset, US
• Daniel A. Japuntich · Windom, US

Key dates

• Filing date: Nov 25, 2008
• Grant date: Sep 10, 2013
• Expiry date: Apr 17, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2459
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Electret webs are presented which include a blend of a thermoplastic resin and a charge additive. The charge additives include ester-substituted and amide-substituted trianilino triazine materials. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.