GB650896A - Improvements in or relating to the production of viscose rayon - Google Patents
Improvements in or relating to the production of viscose rayonInfo
- Publication number
- GB650896A GB650896A GB12944/48A GB1294448A GB650896A GB 650896 A GB650896 A GB 650896A GB 12944/48 A GB12944/48 A GB 12944/48A GB 1294448 A GB1294448 A GB 1294448A GB 650896 A GB650896 A GB 650896A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- per cent
- viscose
- polymerization
- degree
- 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
- 229920000297 Rayon Polymers 0.000 title abstract 13
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 229920002678 cellulose Polymers 0.000 abstract 12
- 239000001913 cellulose Substances 0.000 abstract 12
- 238000006116 polymerization reaction Methods 0.000 abstract 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 6
- 239000000020 Nitrocellulose Substances 0.000 abstract 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 4
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 abstract 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N acetic acid anhydride Natural products CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 abstract 4
- 229920001220 nitrocellulos Polymers 0.000 abstract 4
- 239000001117 sulphuric acid Substances 0.000 abstract 4
- 235000011149 sulphuric acid Nutrition 0.000 abstract 4
- 239000000203 mixture Substances 0.000 abstract 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 2
- 229920000742 Cotton Polymers 0.000 abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 2
- 235000019441 ethanol Nutrition 0.000 abstract 2
- 230000000802 nitrating effect Effects 0.000 abstract 2
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 2
- 238000009987 spinning Methods 0.000 abstract 2
- 238000004804 winding Methods 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- -1 aliphatic alcohols Chemical class 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 abstract 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract 1
- 239000010665 pine oil Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000005070 ripening Effects 0.000 abstract 1
- 239000004753 textile Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000012991 xanthate Substances 0.000 abstract 1
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 rayon filaments, having in the air-dry condition a tenacity greater than 4.8 gm. per denier and an elongation at the breaking point greater than 8 per cent, are obtained by extruding into a bath of sulphuric acid at 10-30 DEG C. a viscose prepared from cellulose containing less than 25 per cent by weight of molecular chains with a degree of polymerization below 500 and less than 4 per cent by weight of molecular chains with a degree of polymerization below 250, said viscose being prepared via alkali-cellulose of which the mean degree of polymerization after ripening is greater than 450, the viscose having a degree of xanthogenation (g ) between 40 and 50, and the sulphuric acid having a concentration between 57.5 and 73 per cent and being defined by the formula: 1.26g +8\sB3, and subjecting the extruded filaments to stretching to increase their length by 150-280 per cent while they are still wet from the spinning bath, washing the filaments and allowing them to relax, and then winding or winding and twisting. The highest quality products are obtained when the viscose has a g -value of about 46 and the acid concentration in the bath is about 66 per cent. The degree of xanthogenation is defined as the number of hydroxyl groups substituted by -CSS- groups per 100 glucose units of the cellulose. Cellulose of the required polymerization characteristics is provided by carefully purified cotton linters. Wood pulps as ordinarily prepared are not suitable but in cases where they conform to the required standard they may be used. The degree of polymerization is calculated from observations of the viscosity of a solution of cellulose nitrate prepared from the cellulose under conditions in which degradation is avoided as far as possible. The cellulose nitrate may be obtained by treating cellulose for 3 hours at 14 DEG C. with a nitrating mixture which has been obtained by mixing acetic acid and acetic anhydride in a refrigerating bath and adding fuming nitric acid. The cellulose nitrate is separated from the nitrating mixture, washed with water, stabilized by extraction with ethyl alcohol, and then dried in vacuo at 50 DEG C. Solutions of the cellulose or cellulose nitrate may be fractionated and the degree of polymerization of the fractions may be determined. In the preparation of the viscose conditions are preferably such that the viscose contains not more than 7 per cent of viscose and not less than 6.5 per cent of caustic soda. The viscosity of the viscose should be greater than 150 c.g.s. units, preferably greater than 250. In an example, bleached cotton linters having an a -cellulose content of 98.2 per cent, mean degree of polymerization 850, with 75.2 per cent of chains of polymerization above 500, 22 per cent of polymerization between 250 and 500, and 2.8 per cent of polymerization below 250, is formed into alkali-cellulose which is shredded at 18 DEG C. with an addition of pine oil. The alkali-cellulose is ripened for 6 hours after which it has a degree of polymerization of 500. The alkali-cellulose is xanthated under vacuum at 25 DEG C. The xanthate obtained is dissolved to form a viscose containing 6.3 per cent of cellulose and 7.8 per cent of caustic soda. Towards the end of the dissolution period tricresyl phosphate or a mixture of branched chain aliphatic alcohols is added to prevent scum forming. The viscose is degassed under vacuum, and then matured for 40 hours. The degree of xanthogenation is 43.5. The viscose is spun into sulphuric acid of 62.8 per cent strength. The filaments are stretched by means of rollers and are then passed through a dilute sulphuric acid bath and allowed to relax. They are finally wound in a spinning pot. The yarns obtained are suitable for making cords to be used in the production of pneumatic tyres, as well as for ordinary textile purposes. The yarns dye readily and evenly. They have good flexibility, knot strength, and work-till-rupture values. Specifications 274,521, 274,690, 281,351, 317,608, 321,679, [all in Class 2 (ii)], and 652,645 are referred to.
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE488949D BE488949A (en) | 1948-05-11 | ||
BE502940D BE502940A (en) | 1948-05-11 | ||
NL88549D NL88549C (en) | 1948-05-11 | ||
GB12944/48A GB650896A (en) | 1948-05-11 | 1948-05-11 | Improvements in or relating to the production of viscose rayon |
FR985847D FR985847A (en) | 1948-05-11 | 1949-05-10 | Further training in the manufacture of viscose rayon |
DEP44201A DE971618C (en) | 1948-05-11 | 1949-05-28 | Process for the production of viscose artificial silk threads |
CH283711D CH283711A (en) | 1948-05-11 | 1949-07-14 | Process for the manufacture of viscose rayon. |
US173924A US2586796A (en) | 1948-05-11 | 1950-07-14 | Production of viscose rayon |
FR60198D FR60198E (en) | 1948-05-11 | 1950-08-10 | Further training in the manufacture of viscose rayon |
GB2032650A GB678335A (en) | 1948-05-11 | 1950-08-16 | Improvements in or relating to the production of viscose rayon |
DEC4525A DE972846C (en) | 1948-05-11 | 1951-07-27 | Process for the production of viscose artificial silk threads |
CH293855D CH293855A (en) | 1948-05-11 | 1951-08-03 | Process for the manufacture of viscose rayon. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12944/48A GB650896A (en) | 1948-05-11 | 1948-05-11 | Improvements in or relating to the production of viscose rayon |
Publications (1)
Publication Number | Publication Date |
---|---|
GB650896A true GB650896A (en) | 1951-03-07 |
Family
ID=10014003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12944/48A Expired GB650896A (en) | 1948-05-11 | 1948-05-11 | Improvements in or relating to the production of viscose rayon |
Country Status (6)
Country | Link |
---|---|
US (1) | US2586796A (en) |
CH (1) | CH283711A (en) |
DE (1) | DE971618C (en) |
FR (1) | FR985847A (en) |
GB (1) | GB650896A (en) |
NL (1) | NL88549C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100395385C (en) * | 2005-11-16 | 2008-06-18 | 东华大学 | Preparation method of lyocell fiber used for cord thread |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2699983A (en) * | 1951-08-03 | 1955-01-18 | Textile & Chem Res Co Ltd | Production of viscose rayon |
US2952508A (en) * | 1953-09-16 | 1960-09-13 | Rayonier Inc | Viscose process and products produced thereby |
US2937922A (en) * | 1954-03-24 | 1960-05-24 | Rayonier Inc | Viscose process |
NL299635A (en) * | 1962-11-06 | |||
AT506268B1 (en) * | 2008-01-11 | 2014-08-15 | Chemiefaser Lenzing Ag | MICROFIBRE |
CN102409461B (en) * | 2011-09-26 | 2014-02-26 | 宜宾海丝特纤维有限责任公司 | Method for preparing embroidery threads by using wet spinning cakes |
CN103643313B (en) * | 2013-12-04 | 2016-06-22 | 宜宾丝丽雅集团有限公司 | Spinning technique suitable in the external spinning-drawing machine of coiler device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE838936C (en) * | 1944-07-25 | 1952-05-15 | Glanzstoff Ag | Process for the production of synthetic viscose threads |
-
0
- NL NL88549D patent/NL88549C/xx active
-
1948
- 1948-05-11 GB GB12944/48A patent/GB650896A/en not_active Expired
-
1949
- 1949-05-10 FR FR985847D patent/FR985847A/en not_active Expired
- 1949-05-28 DE DEP44201A patent/DE971618C/en not_active Expired
- 1949-07-14 CH CH283711D patent/CH283711A/en unknown
-
1950
- 1950-07-14 US US173924A patent/US2586796A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100395385C (en) * | 2005-11-16 | 2008-06-18 | 东华大学 | Preparation method of lyocell fiber used for cord thread |
Also Published As
Publication number | Publication date |
---|---|
DE971618C (en) | 1959-02-26 |
FR985847A (en) | 1951-07-24 |
NL88549C (en) | |
US2586796A (en) | 1952-02-26 |
CH283711A (en) | 1952-06-30 |
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