Electret webs with charge-enhancing additives
US10240269B2 · kind B2 · utility
2Cited by
57References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2015 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Feb 29, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06B2700/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a fused aromatic thiourea, a fused aromatic urea compound, or a combination thereof. The change-enhancing additive may also include a hindered amine light stabilizer compound. 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.