Method of preparing a supported microporous filtration membrane
US5500167A · kind A · utility
54Cited by
31References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 26, 1995 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | May 26, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/1071
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a supported microporous filtration membrane comprising a porous nonwoven fibrous support material having first and second sides, and a continuous microporous membrane having first and second zones, wherein the first side of the support material is integral with the first zone while not protruding into the second zone, and the first zone has a pore size at least about 50% greater than the pore size of the second zone. A method of preparing such a supported microporous membrane is also provided by the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.