Enhanced wet strength filter mats to separate particulates from fluids and/or coalesce entrained droplets from gases
US4293378A · kind A · utility
33Cited by
5References
12Claims
0Family size
Inventor
Key dates
| Filing date | Jan 10, 1980 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Jan 10, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/13
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A glass fiber filter mat possessing excellent wet strength which is in the form of a non-woven matrix of glass micro-fibers including polymer micro-bits derived, for example, from a non-brittle expanded, thermoplastic styrene polymer or a flexible foamed polyurethane, the micro-bits being substantially free of intact cells. Also included in the filter mat is a cobeat or intimate blend of cellulose fibers and the polymer micro-bits, which may additionally contain polyester fibers, as well as a combination of binders, viz., polyvinyl alcohol and a melamineformaldehyde resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.