Polyamide hollow fiber membrane, and production method thereof
US8800783B2 · kind B2 · utility
1Cited by
20References
8Claims
0Family size
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Key dates
| Filing date | Sep 29, 2009 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Sep 7, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/919
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hollow fiber membrane is produced through a thermally induced phase separation process by dissolving a highly hydrophilic polyamide resin in a high-boiling-point solvent such as an aprotic polar solvent at a temperature of not lower than 100° C. The hollow fiber membrane has a membrane surface having a water contact angle of not greater than 80 degrees, and has a water permeability of not less than 100 L/m2·atm·h and a 0.1-μm particle rejection percentage of not less than 90%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.