Oily mist resistant electret filter media and method for filtering
US5411576A · kind A · utility
148Cited by
23References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1994 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Jul 13, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/39
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An oily mist resistant electret filter media is provided. The filter media includes polypropylene electret fibers and a melt processable fluorochemical additive. The additive has a melt temperature of at least 25.degree. C. and a molecular weight of about 500 to 2500. Also provided is a method for filtering particulate material from air containing oily aerosol particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.