GB1349019A - Dry spinning process for fibreforming polymers - Google Patents
Dry spinning process for fibreforming polymersInfo
- Publication number
- GB1349019A GB1349019A GB4840571A GB4840571A GB1349019A GB 1349019 A GB1349019 A GB 1349019A GB 4840571 A GB4840571 A GB 4840571A GB 4840571 A GB4840571 A GB 4840571A GB 1349019 A GB1349019 A GB 1349019A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- spinning
- polymer
- gas
- air
- 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
-
- 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
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/04—Cleaning spinnerettes or other parts of the spinnerette packs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
1349019 Dry-spinning process E I DU PONT DE NEMOURS & CO 18 Oct 1971 [19 Oet 1970] 48405/71 Heading B5B A process for dry-spinning textile filaments from a spinning solution of a fibre-forming polymer in a solvent comprises passing the solution through a spinneret assembly wherein air is removed from the said assembly before the solution is passed therethrough by replacing the air with a gas which is more soluble than air in the spinning solution. The polymer may be a "Spandex" (Registered Trade Mark) polymer, defined as a long chain synthetic elastomer comprised of at least 85% of a segmented polyurethane, an aromatic polyamide, or an acrylonitrile polymer. The term acrylonitrile polymers includes homopolymers and polymers containing at least 85% by wt. of acrylonitrile units, with suitable comonomers. Specified spinning solvents include dimethyl formamide and dimethylacetamide, and the gas more soluble than air must not be unduly corrosive to equipment, should not be toxic for safety reasons and must be inert in the solution to be spun. For solutions of acrylic or spandex polymer in dimethyl formamide or dimethylacetamide carbon dioxide is the preferred gas. Nitrogen is less soluble than air in solutions of acrylic polymer or spandex polymer in dimethyl formamide and dimethylacetamide, and is not a suitable gas according to this invention for replacement of air in spinneret assemblies or spinning fibres from a solution. Oxygen is not inert to the solution to be spun. Desirably, at starting, the solution to be spun through the spinneret should be at as low a temperature as convenient. This result is thought to be due to the increase in solubility of the soluble gas in the solution at lower temperatures. The dry spinning apparatus shown may be used. As shown, spinning solution is delivered to conduit 1 which passes through heating chamber 3. Heat transfer fluid enters chamber 3 through passage 5 and exits through passage 7. Spinning solution from conduit 1 flows through the spinneret assembly consisting of pack body 9, filter pack 11, distributer plate 13, spinneret 15, retainer plate 17, bolt 19, and threaded ring 21. Hot gas from a source not shown is delivered through conduit 23 to gas distributer chamber 25 which is insulated from the heating chamber as shown and from which it flows through turbulence suppressing means consisting of perforated plate 27 and screen 29 to contact the filaments in the spinning cell. The filaments lose the bulk of the solvent to the hot, evaporative medium as they progress through the spinning cell (not shown) position below Fig. 1, and are withdrawn at a carefully regulated speed for subsequent processing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8182970A | 1970-10-19 | 1970-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1349019A true GB1349019A (en) | 1974-03-27 |
Family
ID=22166664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4840571A Expired GB1349019A (en) | 1970-10-19 | 1971-10-18 | Dry spinning process for fibreforming polymers |
Country Status (3)
Country | Link |
---|---|
US (1) | US3671653A (en) |
GB (1) | GB1349019A (en) |
ZA (1) | ZA716706B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6066687A (en) * | 1994-06-24 | 2000-05-23 | Solutia Inc. | Acrylic fiber with high optical brightness |
US5728226A (en) * | 1996-07-22 | 1998-03-17 | Basf Corporation | Process for cleaning an assembled spin pack of a melt spinning assembly |
US6270705B1 (en) * | 1999-02-16 | 2001-08-07 | Praxair Technology, Inc. | Method and system for inerting polymeric film producing machines |
BR112017011558B1 (en) * | 2014-12-04 | 2021-11-09 | Zhengzhou Zhongyuan Spandex Engineering Technology Co., Ltd | DRY WIRING COMPONENT OF ELASTIC FIBERS AND DRY WIRING PART OF ELASTIC FIBER |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US345816A (en) * | 1886-07-20 | Method of drawing metal rods | ||
NL62378C (en) * | 1942-08-25 | |||
US3496263A (en) * | 1965-07-21 | 1970-02-17 | Asahi Chemical Ind | Process for the recovery of n,n-dimethylformamides of n,n - dimethylacetamides from waste gases in the dry spinning of polyacrylonitrile by water contact and condensing |
US3461193A (en) * | 1967-01-04 | 1969-08-12 | Du Pont | Novel procedure for starting the flash-extrusion of expandable resin compositions |
US3509244A (en) * | 1967-08-09 | 1970-04-28 | Du Pont | Process and apparatus for providing uniform temperature dry-spinning |
-
1970
- 1970-10-19 US US81829A patent/US3671653A/en not_active Expired - Lifetime
-
1971
- 1971-10-06 ZA ZA716706A patent/ZA716706B/en unknown
- 1971-10-18 GB GB4840571A patent/GB1349019A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3671653A (en) | 1972-06-20 |
ZA716706B (en) | 1972-06-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |