Composite filter media
US8308834B2 · kind B2 · utility
21Cited by
27References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2008 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Feb 5, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/0069
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite filter media structure includes, in an exemplary embodiment, a base substrate that includes a nonwoven synthetic fabric formed from a plurality of fibers with a spunbond process. The base substrate has a minimum filtration efficiency of about 50%, measured in accordance with ASHRAE 52.2-1999 test procedure A nanofiber layer is deposited on one side of the base substrate. The composite filter media structure has a minimum filtration efficiency of about 75%, measured in accordance with ASHRAE 52.2-1999 test procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.