Process of making a fibrous electret web
US6824718B2 · kind B2 · utility
45Cited by
61References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Feb 14, 2023 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2101/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for imparting an electrostatic charge to a nonwoven fibrous web 20. The fibrous web 20 is contacted with a liquid solution that includes water and a non-aqueous water soluble component, followed by drying 31. The resulting dried product is an electret article 43 that could be used as an air filter in, for example, a respirator 50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.