Hollow fiber membrane and braided tubular support therefor
US6354444B1 · kind B1 · utility
135Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Jun 17, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An asymmetric membrane comprising a tubular polymer film in combination with a tubular braid on which the film is supported, requires the braid be macroporous and flexible, yet sufficiently strong to withstand continuous flexing, stretching and abrasion during use for microfiltration (MF) or ultrafiltration (UF). The specifications for a braid of a long-lived membrane are provided. A membrane is formed by supporting a polymer film in which particles of calcined &agr;-alumina are dispersed, on the defined tubular braid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.