JPS6414315A - Production of porous hollow fiber membrane - Google Patents
Production of porous hollow fiber membraneInfo
- Publication number
- JPS6414315A JPS6414315A JP17064087A JP17064087A JPS6414315A JP S6414315 A JPS6414315 A JP S6414315A JP 17064087 A JP17064087 A JP 17064087A JP 17064087 A JP17064087 A JP 17064087A JP S6414315 A JPS6414315 A JP S6414315A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- hollow fiber
- undrawn
- spinning
- crystallinity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To obtain the titled membrane for purification and separation, etc., without using a porosifying assistant, by controlling the spining and heat- treatment conditions to control the crystallinity and orientation of a hollow fiber produced by the melt-spinning of a thermoplastic polyester, etc., and drawing the fiber under a condition to effect the preferential drawing of only the amorphous part. CONSTITUTION:A thermoplastic polyester or polyamide is subjected to melt- spinning at a spinning speed of >=500m/min and a draft of >=1,000 to obtain an undrawn hollow fiber having a wall thickness of <=100mum. The undrawn fiber is heat-treated in an inert gas at a temperature lower than the melting point of the polymer by 2-50 deg.C for >=1min to obtain an undrawn hollow fiber having a crystallinity of 25-50% and a long-period of >=100Angstrom calculated from small angle X-ray scattering pattern. The fiber is drawn by 4-40% at <=50 deg.C and subjected to single or multiple stage drawing at a temperature higher than the above drawing temperature by >=10 deg.C and lower than 80 deg.C at a total draw ratio of 20-400% to obtain the objective hollow fibrous membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17064087A JPS6414315A (en) | 1987-07-08 | 1987-07-08 | Production of porous hollow fiber membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17064087A JPS6414315A (en) | 1987-07-08 | 1987-07-08 | Production of porous hollow fiber membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6414315A true JPS6414315A (en) | 1989-01-18 |
Family
ID=15908621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17064087A Pending JPS6414315A (en) | 1987-07-08 | 1987-07-08 | Production of porous hollow fiber membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6414315A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996038221A1 (en) * | 1995-06-01 | 1996-12-05 | Gkss-Forschungszentrum Geesthacht Gmbh | Method of producing hollow fibre polymer membranes |
| US6878276B2 (en) | 2001-12-11 | 2005-04-12 | Zenon Environmental Inc. | Methods of making stretched filtering membranes and modules |
| US9022229B2 (en) | 2012-03-09 | 2015-05-05 | General Electric Company | Composite membrane with compatible support filaments |
| US9061250B2 (en) | 2009-06-26 | 2015-06-23 | Bl Technologies, Inc. | Non-braided, textile-reinforced hollow fiber membrane |
| US9221020B2 (en) | 2010-09-15 | 2015-12-29 | Bl Technologies, Inc. | Method to make yarn-reinforced hollow fiber membranes around a soluble core |
| US9643129B2 (en) | 2011-12-22 | 2017-05-09 | Bl Technologies, Inc. | Non-braided, textile-reinforced hollow fiber membrane |
-
1987
- 1987-07-08 JP JP17064087A patent/JPS6414315A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996038221A1 (en) * | 1995-06-01 | 1996-12-05 | Gkss-Forschungszentrum Geesthacht Gmbh | Method of producing hollow fibre polymer membranes |
| US6878276B2 (en) | 2001-12-11 | 2005-04-12 | Zenon Environmental Inc. | Methods of making stretched filtering membranes and modules |
| US9061250B2 (en) | 2009-06-26 | 2015-06-23 | Bl Technologies, Inc. | Non-braided, textile-reinforced hollow fiber membrane |
| US9221020B2 (en) | 2010-09-15 | 2015-12-29 | Bl Technologies, Inc. | Method to make yarn-reinforced hollow fiber membranes around a soluble core |
| US9643129B2 (en) | 2011-12-22 | 2017-05-09 | Bl Technologies, Inc. | Non-braided, textile-reinforced hollow fiber membrane |
| US9022229B2 (en) | 2012-03-09 | 2015-05-05 | General Electric Company | Composite membrane with compatible support filaments |
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