Method for manufacturing hydrophilized hollow fiber membrane by continuous process using extruder
US9597830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2013 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Sep 23, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/755
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method of manufacturing a hydrophilized hollow fiber membrane by a continuous process using an extruder. According to the method of the present invention, thermal curing agent in the form of a monomer or a oligomer is added to a polymer solution, and in the melt state before a separation membrane is manufactured, thermal polymerization occurs due to an initial reaction of a thermal initiator at the appropriate temperature within a cylinder of the extruder. Thus, a hydrophilic component is evenly distributed into the membrane at the micro-level, and the hydrophilic component is not washed out, resulting in very high stability. Another advantage is high economic value and efficiency because the process for hydrophilizing the membrane as well as the process for manufacturing the membrane is carried out by the continuous process using the extruder without using conventional extrusion equipment in the form of an agitator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.