Electret webs with charge-enhancing additives
US8790449B2 · kind B2 · utility
16Cited by
50References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2010 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Apr 12, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/696
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include a heterocyclic imide material which is free of fluorinated groups. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.