Method of making a rigidized fiber filter element
US5290502A · kind A · utility
6Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Sep 25, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/71
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A rigidized fiber filter element is produced from a precursor fiber web. The precursor fiber web contains heat-shrinkable fibers or binder fibers or both. The web is exposed to temperatures sufficiently elevated to cause shrinkage of the fibers or melting of the binder. After cooling the web, the filter elements produced are self-supporting, and may have densities up to 500 kg/m.sup.3 to improve filtration while retaining good functional characteristics for operating pressure drop and air permeability. Rigidized fiber filter elements can be constructed of one material, and thus may be suitable for recycling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.