US2291718A - Viscose spinning process - Google Patents
Viscose spinning process Download PDFInfo
- Publication number
- US2291718A US2291718A US277626A US27762639A US2291718A US 2291718 A US2291718 A US 2291718A US 277626 A US277626 A US 277626A US 27762639 A US27762639 A US 27762639A US 2291718 A US2291718 A US 2291718A
- Authority
- US
- United States
- Prior art keywords
- per cent
- bath
- threads
- viscose
- per
- 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 - Lifetime
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
Definitions
- This invention relates to a spinning process for viscose rayon.
- the present invention is based on the observation that a plasticizing agent may be added to the coagulation bath with the result that the threads obtained can be well stretched and are then of good tenacity.
- the invention consists in a process in which the threads are coagulated in a bath free of acid and containing a non-acid plasticizing agent, for instance urea, thiourea, ammonium thiocyanate or the like, the coagulated thread being stretched.
- a non-acid plasticizing agent for instance urea, thiourea, ammonium thiocyanate or the like
- the decomposition to cellulose hydrate may occur under stretching or wholly without stretching; for example after the thread has been cut into staple fiber.
- decomposing baths there may be solutions of acids alone or of acids and salts, tor lnstance the known Miiller bath.
- the decompositipn may also be a thermal effect, for example the;t hr ead be subjected to a hot liquid or hot vapor rasca especially useful in case oi. cut staple. fiber.
- Example 1 From a. normally ripened viscose having for example 7.5 per cent of cellulose and 6.5 per cent of alkali there is spun a thread having a single titer of 2.6 denier from a spinneret having 120 perforations each of 0.08 millimeter diameter into a bath containing 8.5 per cent of NazSO4, 16 per cent of (NH-0:804 and 39 per cent of urea the bath having a temperature of 60C.
- the threads issuing from this .bathare drawn over glass rods arranged to afiord a zig-zag path, thedraught being meters per minute.
- the coagulated and stretched threads are cut to staple length and decomposed in boiling sodium sulphate solution.
- the staple fibers are desulfurized in the usual manner and then soaped. 'Ihe fibers thus spun have a good extension and a very good tenacity: V a Dry tenacity: 3.8 per denier extension 19 per cent.
- the coagulation bath may have a composition different from that described in example. Preferably however the bath should not contain more than per cent oi water. Baths oi the following composition also give good results: 5.5 per cent of NaeSOr, 19 per cent (NHAMSGQ,
- the thread is stretched over several glass rods set to form a zig-zag path and is wound at the rate of 50 meters per minute on a spool.
- the spool runs during me spinning in an acid upper bath containing 13 per cent of sulfuric acid and- -28 per cent of sodium sulfate.
- the acid spool is further treated in the usual manner, for example de-acidified in a suction washer and desuliurized in the form of hanks and then bleached and soaped. I Dry tenacity: 3.3 per denier, extension 6 per cent.
- a process of producing viscose threads which comprises spinning viscose-into an aqueous acid free bath incapable of entirely decomposing the cellulose xanthate, but capable of coagulating the viscose, said bath containing sodium sulfate, ammonium sulfate .and urea in such quantities as to amount to more than 50% of the bath, stretching the threads while in plastic condition and decomposing the cellulose xanthate to cellulose hydrate.
- a process of producing viscose threads which comprises spinning viscose into an aqueous bath free from acids, incapable of decomposing the cellulose xanthate but capable of coagulating the viscose, said bath containing sodium sulfate, ammonium sulfate and urea in such quantities as to amount to more than 50% of the bath, stretching the threads after leaving the bath, cutting oil the threads in staples and decomposing the staple wastein hot solution or hot vapors.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE212172X | 1938-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2291718A true US2291718A (en) | 1942-08-04 |
Family
ID=5806686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US277626A Expired - Lifetime US2291718A (en) | 1938-06-07 | 1939-06-06 | Viscose spinning process |
Country Status (4)
Country | Link |
---|---|
US (1) | US2291718A (hu) |
CH (1) | CH212172A (hu) |
FR (1) | FR855774A (hu) |
NL (1) | NL52621C (hu) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427993A (en) * | 1944-07-26 | 1947-09-23 | Ind Rayon Corp | Production of rayon |
-
0
- NL NL52621D patent/NL52621C/xx active
-
1939
- 1939-05-22 CH CH212172D patent/CH212172A/de unknown
- 1939-06-05 FR FR855774D patent/FR855774A/fr not_active Expired
- 1939-06-06 US US277626A patent/US2291718A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427993A (en) * | 1944-07-26 | 1947-09-23 | Ind Rayon Corp | Production of rayon |
Also Published As
Publication number | Publication date |
---|---|
NL52621C (hu) | |
FR855774A (fr) | 1940-05-20 |
CH212172A (de) | 1940-11-15 |
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