GB1340846A - Process and apparatus for melt spinning hollow filaments - Google Patents
Process and apparatus for melt spinning hollow filamentsInfo
- Publication number
- GB1340846A GB1340846A GB1340846DA GB1340846A GB 1340846 A GB1340846 A GB 1340846A GB 1340846D A GB1340846D A GB 1340846DA GB 1340846 A GB1340846 A GB 1340846A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- pressure
- spinneret
- liquid
- dip tube
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
1340846 Hollow filaments E I DU PONT DE NEMOURS & CO 16 March 1972 12418/72 Heading B5B In a process for melt-spinning hollow fibres of synthetic organic polymer, the molten polymer is extruded in the form of thin-walled hollow filaments from spinneret orifices having an annular melt-passageway surrounding a central gas channel, and gas is fed into the filament hollow through the gas channel at a controlled pressure relative to pressure outside the filament by venting the gas supply from beneath a head of liquid in an open container to limit the pressure and passing the gas from beneath a head of liquid in a closed container connected to the gas channel, to adjust the gas pressure in the gas channel to a value controlled by the differential between the heads of liquid in the two containers. The polymer may be a polyamide, especially nylon-6 or nylon-66, or a polyester, especially polyethylene terephthalate. Preferably the supply of gas to the closed container and that to the container from which gas is vented are at substantially equal pressures. In apparatus as shown, a source of gas, e.g. nitrogen cylinder 27 fitted with a conventional pressure regulator 29 is connected to a tubing 31 and hand-adjustable throttling-valve 33. Valve 33 connects to tee 45, which is connected on one side via shut-off valve 35 to direct-acting dip tube 47 immersed in water or other suitable liquid 37 in open-top container 38. The other side of the tee is connected to reverse-acting dip tube 39 in liquid filled closed container 41 to adjust the gas pressure. Line 43 leads to the spinneret assembly of Figure 2. Depth of immersion of dip tube 47 in the liquid in container 38 determines the pressure at which gas will be supplied to the second dip tube 39, excess gas venting through 38. The difference in depth of immersion between dip tube 39 and dip tube 47 determines the pressure at which gas will be supplied through conduit 43 to the spinneret. Hence precise control of the pressure differential relative to atmospheric pressure around the spinneret assembly can be maintained. Spinneret plate 1 of Fig. 2 is sealed against spinning block 2 by gasket 3, and the spinneret melt passageway 7 has an insert 5 which channels liquid polymer into annular melt passageway 9. Gas from conduit 43 enters heater-passage 11, which is equipped with a heating jacket 13, so that the gas temperature is raised to approximately polymer temperature at the heater exit. Heated gas passes through channel 12 and enters annular chamber 14, extending around the spinneret periphery. Gas from 14 enters passage 15 and thence channel 17 positioned centrally within melt-passageway 9, and enters the filament gas channel 25 created by insert 5, maintaining a uniform hollow in the filament.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1241872 | 1972-03-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1340846A true GB1340846A (en) | 1973-12-19 |
Family
ID=10004243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1340846D Expired GB1340846A (en) | 1972-03-16 | 1972-03-16 | Process and apparatus for melt spinning hollow filaments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1340846A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2430606A1 (en) * | 1978-07-07 | 1980-02-01 | Du Pont | DOSER FOR GASEOUS IMPURITIES WITH DIFFUSING DEVICE AND METHOD FOR USING SAME |
US4760691A (en) * | 1983-04-25 | 1988-08-02 | Monsanto Company | Partially oriented nylon yarn and process |
WO2011051273A3 (en) * | 2009-10-29 | 2011-11-24 | Basf Se | Process for the preparation of hyperbranched hollow fibers |
CN106757437A (en) * | 2017-01-06 | 2017-05-31 | 东华大学 | A kind of porous spinneret of melt-spun hollow-fibre membrane |
CN108034999A (en) * | 2018-01-19 | 2018-05-15 | 山东招金膜天股份有限公司 | A kind of spinneret for producing long fiber reinforced type hollow-fibre membrane |
CN109957899A (en) * | 2017-12-25 | 2019-07-02 | 宁波斯宾拿建嵘精密机械有限公司 | A kind of hollow pricker dimension film spinning head of novel lining-reinforced |
CN110621815A (en) * | 2017-05-11 | 2019-12-27 | 费森尤斯医疗护理德国有限责任公司 | Spinning nozzle, device having a spinning nozzle, method for producing hollow fibers or hollow fiber membranes by means of a spinning nozzle, and filter |
CN114672890A (en) * | 2022-04-15 | 2022-06-28 | 诸暨市天同化纤有限公司 | Preparation method of hollow microporous anti-fracture polyester POY (pre-oriented yarn) filament |
-
1972
- 1972-03-16 GB GB1340846D patent/GB1340846A/en not_active Expired
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2430606A1 (en) * | 1978-07-07 | 1980-02-01 | Du Pont | DOSER FOR GASEOUS IMPURITIES WITH DIFFUSING DEVICE AND METHOD FOR USING SAME |
US4760691A (en) * | 1983-04-25 | 1988-08-02 | Monsanto Company | Partially oriented nylon yarn and process |
WO2011051273A3 (en) * | 2009-10-29 | 2011-11-24 | Basf Se | Process for the preparation of hyperbranched hollow fibers |
CN102713029A (en) * | 2009-10-29 | 2012-10-03 | 巴斯夫欧洲公司 | Process for the preparation of hyperbranched hollow fibers |
CN102713029B (en) * | 2009-10-29 | 2015-04-29 | 巴斯夫欧洲公司 | Process for the preparation of hyperbranched hollow fibers |
US9234302B2 (en) | 2009-10-29 | 2016-01-12 | Basf Se | Process for the preparation of hyperbranched hollow fibers |
CN106757437A (en) * | 2017-01-06 | 2017-05-31 | 东华大学 | A kind of porous spinneret of melt-spun hollow-fibre membrane |
CN110621815A (en) * | 2017-05-11 | 2019-12-27 | 费森尤斯医疗护理德国有限责任公司 | Spinning nozzle, device having a spinning nozzle, method for producing hollow fibers or hollow fiber membranes by means of a spinning nozzle, and filter |
CN110621815B (en) * | 2017-05-11 | 2022-11-04 | 费森尤斯医疗护理德国有限责任公司 | Spinning nozzle, device having a spinning nozzle, method for producing hollow fibers or hollow fiber membranes by means of a spinning nozzle, and filter |
CN109957899A (en) * | 2017-12-25 | 2019-07-02 | 宁波斯宾拿建嵘精密机械有限公司 | A kind of hollow pricker dimension film spinning head of novel lining-reinforced |
CN109957899B (en) * | 2017-12-25 | 2024-01-12 | 宁波斯宾拿建嵘精密机械有限公司 | Novel lining reinforced hollow fiber membrane spinneret |
CN108034999A (en) * | 2018-01-19 | 2018-05-15 | 山东招金膜天股份有限公司 | A kind of spinneret for producing long fiber reinforced type hollow-fibre membrane |
CN108034999B (en) * | 2018-01-19 | 2023-09-01 | 山东招金膜天股份有限公司 | Spinneret plate for producing long fiber reinforced hollow fiber membrane |
CN114672890A (en) * | 2022-04-15 | 2022-06-28 | 诸暨市天同化纤有限公司 | Preparation method of hollow microporous anti-fracture polyester POY (pre-oriented yarn) filament |
CN114672890B (en) * | 2022-04-15 | 2023-02-07 | 诸暨市天同化纤有限公司 | Preparation method of hollow microporous anti-fracture polyester POY (pre-oriented yarn) filament |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |