Air filtration media
US5480466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1994 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Nov 4, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air filtration media comprises a single layer of randomly oriented and randomly intermingled synthetic, polymeric resin microfibers, staple fibers and bonding fibers. The microfibers, taken as a whole, have an average fiber diameter no greater than 5 microns and comprise between 50% and 90% by weight of the filtration media; the staple fibers, taken as a whole, have an average fiber diameter between 10 and 30 microns and comprise between 5% and 45% by weight of the filtration media; and the bonding fibers, taken as a whole, have an average fiber diameter between 10 and 30 microns and comprise between 5% and 25% by weight of the filtration media. The bonding fibers have thermoplastic surfaces with a lower temperature softening point than the microfibers and the staple fibers and bond the fibers together to form the air filtration media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.