GB1340846A – Process and apparatus for melt spinning hollow filaments
– Google Patents
GB1340846A – Process and apparatus for melt spinning hollow filaments
– Google Patents
Process and apparatus for melt spinning hollow filaments
Info
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
1972-03-16
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
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date 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 date listed.)
1972-03-16
Filing date
1972-03-16
Publication date
1973-12-19
1972-03-16
Application filed by EI Du Pont de Nemours and Co
filed
Critical
EI Du Pont de Nemours and Co
1973-12-19
Publication of GB1340846A
publication
Critical
patent/GB1340846A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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.
GB1340846D
1972-03-16
1972-03-16
Process and apparatus for melt spinning hollow filaments
Expired
GB1340846A
(en)
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)
* Cited by examiner, † Cited by third party
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 (14)
* Cited by examiner, † Cited by third party
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
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
1974-05-01
PS
Patent sealed
1979-11-21
PCNP
Patent ceased through non-payment of renewal fee
