Electret webs with charge-enhancing additives
US9815067B2 · kind B2 · utility
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53References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2014 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Jul 23, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/0435
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is an arylamino-substituted benzoic acid or an arylamino-substituted benzoic acid 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.