Patent · US Active

Electret webs with charge-enhancing additives

US9815068B2 · kind B2 · utility

1Cited by

57References

23Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Nathan E. Schultz · Lakeland, US
Fuming B. Li · Woodbury, US
John M. Sebastian · Maplewood, US

Key dates

Filing date	Mar 15, 2013
Grant date	Nov 14, 2017
Priority date	—
Expiry date	Jul 28, 2033

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01F6/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a divalent metal-containing substituted-mercaptobenzimidazolate salt. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.