GB602533A - Improvements in or relating to the production of crinkled viscose filaments - Google Patents
Improvements in or relating to the production of crinkled viscose filamentsInfo
- Publication number
- GB602533A GB602533A GB27057/45A GB2705745A GB602533A GB 602533 A GB602533 A GB 602533A GB 27057/45 A GB27057/45 A GB 27057/45A GB 2705745 A GB2705745 A GB 2705745A GB 602533 A GB602533 A GB 602533A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- bath
- filaments
- litre
- viscose
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
Viscose is spun into a coagulating bath in which slow regeneration is effected while the filaments are under "low tension" and the regenerated filaments are subjected to "high tension" stretching while wet, causing them to develop the property of crinkling spontaneously when wet with water. By "low tension" is meant such positive tension as is sufficient to draw the filaments through the bath at a speed in excess of the extrusion speed, i.e. a torsion of less than 0.3 g./denier. "High tension" stretching refers to tensions of above 0.5 g./denier and especially to tensions of 0.75 to 1.0 g./denier, the upper limit being the point at which the filaments become damaged. The slow regeneration is effected either by using a viscose of special composition with an ordinary Muller coagulating bath, or by an ordinary viscose with a regenerating bath of special composition. The special composition viscose comprises a viscose of cellulose content 9-13 per cent, a caustic soda content 8-13 per cent and a cellulose to caustic soda ratio of 0.833 to 1.13 (the best results are obtained using a viscose containing 10 per cent of each and a ratio of 1.0), and this is spun into a bath comprising 125-145 g./litre sulphuric acid, 235-330 g./litre sodium sulphate and 12.5 g./litre zinc sulphate with or without 50 g./litre glucose. When using an ordinary viscose (i.e. of cellulose content 7-8.5 per cent, caustic soda content 6-7.4 per cent and cellulose/caustic soda ratio about 1.15), the spinning bath comprises 90 g./litre sulphuric acid, 300 g./litre sodium sulphate and 42 g./litre zinc sulphate. The regenerated filaments are subjected to a high degree of stretching in any appropriate manner and at any convenient time, for example while wet with the spinning bath, during or after washing, during or after bleaching, or after drying and re-wetting. Dried filaments should be re-wetted in an aqueous swelling bath containing, say 1 per cent caustic soda or 5 per cent of dibenzyl dimethyl ammonium hydroxide (a wetting agent) before stretching. The stretched filaments may be led while under tension through a bath containing saturated ammonium sulphate solution, which inhibits crinkling, and then they may be cut into staple, opened and dropped into water, whereupon they crinkle. The process is particularly applicable to the spinning of wool-like staple fibre having filament denier of 1-7 or lower. The crinkled filaments are stable and repeated boiling does not impair the crinkles. In an example, a viscose with a cellulose content 10 per cent and caustic soda content 10 per cent and salt point 5.8 is spun into an ordinary coagulating bath (140 g./litre H2SO4, 245 g./litre Na2SO4, 50 g./litre glucose and 12.5 g./litre ZnSO4) at 47 DEG C. using a 100-hole spinneret having holes 0.0020 inch diameter. The filaments are drawn out of the bath at a speed of 85 metres per minute and wound on a bobbin, washed acid free, stretched 30 per cent on a slasher and dried under tension. The dried yarn is skeined and immersed in a hot-water desulphurizing bath containing 1 per cent caustic soda, whereupon crinkling occurs immediately. The crinkled skeins are bleached, oiled and dried. In another example, a wood-pulp viscose having a 10 per cent cellulose content and a cellulose/caustic soda ratio of 1.0 and a salt point of 5.3 is spun at 47.5 DEG C. into a coagulating bath of composition as in the previous example, but without glucose, and using a 480-hole spinneret, each hole being of 0.0030 inch diameter. The filaments are drawn through the bath for a distance of 100 inches under a tension of 200 grams and wound on a bobbin at a speed of 85 metres per minute. After being washed free from acid, the bobbins are stretched 30 per cent on a slasher and led through a bath containing 50 per cent (NH4)2SO4, excess solution being removed by a squeeze roll. The bundle of filaments is cut into 4-inch staples, opened and dropped into water, crinkling immediately and spontaneously into 1-inch lengths.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US559234A US2491938A (en) | 1944-10-18 | 1944-10-18 | Method of producing viscose filaments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB602533A true GB602533A (en) | 1948-05-28 |
Family
ID=24232829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27057/45A Expired GB602533A (en) | 1944-10-18 | 1945-10-16 | Improvements in or relating to the production of crinkled viscose filaments |
Country Status (2)
Country | Link |
---|---|
US (1) | US2491938A (en) |
GB (1) | GB602533A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2572936A (en) * | 1947-02-27 | 1951-10-30 | American Viscose Corp | Process for making crimped artificial filaments |
US2964787A (en) * | 1953-06-16 | 1960-12-20 | American Enka Corp | Continuous spinning system |
US2977184A (en) * | 1953-06-16 | 1961-03-28 | American Enka Corp | Production of rayon |
US2882122A (en) * | 1956-01-05 | 1959-04-14 | Du Pont | Process for producing crimpable regenerated cellulose filaments |
US3046083A (en) * | 1960-06-06 | 1962-07-24 | American Viscose Corp | Method for producing crimped rayon staple fiber |
NL272684A (en) * | 1960-12-27 | |||
JP4358106B2 (en) * | 2002-07-09 | 2009-11-04 | レンツィンク アクチェンゲゼルシャフト | Method for producing solid recycled viscose fiber |
CN113897709A (en) * | 2021-10-29 | 2022-01-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Regenerated cellulose wet spinning |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US462184A (en) * | 1891-10-27 | weyer | ||
US492279A (en) * | 1893-02-21 | Trousers stretcher and shaper | ||
US483404A (en) * | 1892-09-27 | Coal-chute | ||
NL28983C (en) * | 1929-07-15 | 1933-02-15 | ||
US2233418A (en) * | 1937-05-25 | 1941-03-04 | Ind Rayon Corp | Manufacture of staple fiber |
NL51932C (en) * | 1937-11-23 | |||
US2249745A (en) * | 1937-12-21 | 1941-07-22 | Du Pont | Cellulosic structures and method of producing same |
US2315560A (en) * | 1938-07-13 | 1943-04-06 | North American Rayon Corp | Method for producing high strength and crimped staple fibers from viscose |
DE749264C (en) * | 1938-11-09 | 1944-11-21 | Ig Farbenindustrie Ag | Process for the production of synthetic fibers or threads from viscose |
US2267055A (en) * | 1939-06-10 | 1941-12-23 | Du Pont | Production of regenerated cellulose yarn |
US2340377A (en) * | 1939-12-11 | 1944-02-01 | Graumann Erich | Process of making artificial fibers |
US2297746A (en) * | 1940-10-17 | 1942-10-06 | Du Pont | Process for the production of cellulosic structures |
US2312152A (en) * | 1941-12-10 | 1943-02-23 | American Viscose Corp | Rayon and method of manufacturing same |
US2347884A (en) * | 1942-11-03 | 1944-05-02 | Du Pont | Method of producing cellulosic structures |
US2347883A (en) * | 1942-11-03 | 1944-05-02 | Du Pont | Production of cellulosic structures |
-
1944
- 1944-10-18 US US559234A patent/US2491938A/en not_active Expired - Lifetime
-
1945
- 1945-10-16 GB GB27057/45A patent/GB602533A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2491938A (en) | 1949-12-20 |
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