GB757233A - Improvements in and relating to the production of regenerated cellulose fibres from viscose - Google Patents
Improvements in and relating to the production of regenerated cellulose fibres from viscoseInfo
- Publication number
- GB757233A GB757233A GB3358653A GB3358653A GB757233A GB 757233 A GB757233 A GB 757233A GB 3358653 A GB3358653 A GB 3358653A GB 3358653 A GB3358653 A GB 3358653A GB 757233 A GB757233 A GB 757233A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- bath
- fibres
- viscose
- salt
- 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
- 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
- D01F2/08—Composition of the spinning solution or the bath
Abstract
Regenerated cellulose fibres are produced by extruding viscose of salt figure below 3.5 into an aqueous coagulating bath containing below 5 per cent by weight of sulphuric acid and more than 20 per cent by weight of salts, including at least 5 per cent of magnesium sulphate, withdrawing the fibres from the bath at a rate equal to or lower than the extrusion rate of the viscose into the bath and subsequently completing the fixation of the fibres in an aqueous acid bath having a higher rate of concentration of acid to salt than the coagulating bath, but preferably less than the bisulphate ratio at which the concentration of ions is equivalent to a solution of sodium bisulphate. The salt figure is defined as the concentration of a solution of common salt necessary just to coagulate a drop of viscose, and is preferably 0.5-3.5. The preferred composition of the coagulating bath is 0.5-5 per cent of sulphuric acid, 10-25 per cent of sodium sulphate, 5-20 per cent of magnesium sulphate and a total salt content of about 30 per cent. The extrusion rate of the viscose is preferably 1-20 times the speed of withdrawal of the fibres from the bath, to allow the fibres to thicken on emerging from the jet. The fibres are preferably passed through the regenerating bath in a relaxed condition or under low tension. In an example, viscose containing 7.5 per cent of cellulose 7 per cent of caustic soda and 2.2 per cent of combined sulphur and aged to a salt figure of 1.2 is extruded into a coagulating bath at 55 DEG C. containing 1.5 per cent by weight of sulphuric acid, 15 per cent of magnesium sulphate and 15 per cent of sodium sulphate. The thread thus obtained is withdrawn from the bath at a rate of 40 metres per minute, the ratio of extrusion rate to take-up speed being 1 : 0.236, and is passed round a godet and through a second bath at 60 DEG C. containing 3 per cent of sulphuric acid and a small quantity of salts carried over from the coagulating bath. The thread then passes over a second godet and is collected in a centrifugal spinning-box. The second godet travels at a lower speed than the first godet so that the thread is under low tension in the second bath. The products give bulky yarns and fabrics and have a more irregular cross-section than have normal viscose fibres.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3358653A GB757233A (en) | 1953-12-03 | 1953-12-03 | Improvements in and relating to the production of regenerated cellulose fibres from viscose |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3358653A GB757233A (en) | 1953-12-03 | 1953-12-03 | Improvements in and relating to the production of regenerated cellulose fibres from viscose |
Publications (1)
Publication Number | Publication Date |
---|---|
GB757233A true GB757233A (en) | 1956-09-19 |
Family
ID=10354838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3358653A Expired GB757233A (en) | 1953-12-03 | 1953-12-03 | Improvements in and relating to the production of regenerated cellulose fibres from viscose |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB757233A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0574762A1 (en) * | 1992-06-13 | 1993-12-22 | Hoechst Aktiengesellschaft | Process for the production of viscose rayon fibers with ribbon-like cross-section |
WO1999007926A2 (en) * | 1997-08-07 | 1999-02-18 | Achim Neumayr | Method for producing a cellulose fibre from hydrocellulose |
-
1953
- 1953-12-03 GB GB3358653A patent/GB757233A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0574762A1 (en) * | 1992-06-13 | 1993-12-22 | Hoechst Aktiengesellschaft | Process for the production of viscose rayon fibers with ribbon-like cross-section |
WO1999007926A2 (en) * | 1997-08-07 | 1999-02-18 | Achim Neumayr | Method for producing a cellulose fibre from hydrocellulose |
WO1999007926A3 (en) * | 1997-08-07 | 2000-04-20 | Achim Neumayr | Method for producing a cellulose fibre from hydrocellulose |
US6720057B1 (en) | 1997-08-07 | 2004-04-13 | Achim Neumayr | Method for producing a cellulose fibre from hydrocellulose |
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