GB928770A - Production of regenerated cellulose materials - Google Patents
Production of regenerated cellulose materialsInfo
- Publication number
- GB928770A GB928770A GB13840/61A GB1384061A GB928770A GB 928770 A GB928770 A GB 928770A GB 13840/61 A GB13840/61 A GB 13840/61A GB 1384061 A GB1384061 A GB 1384061A GB 928770 A GB928770 A GB 928770A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filaments
- bath
- viscose
- cellulose
- acid
- 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
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
Regenerated cellulose filaments are made by spinning viscose of viscosity at least 150 poises at 15 DEG C. of Y-value at least 40 and containing cellulose of degree of polymerization at least 400, in an aqueous acid bath containing 60-120 g./l. sulphuric acid, 100-250 g./l. of anhydrous sodium sulphate, 10-150 g./l. of anhydrous zinc sulphate and 1-40 g./l. of formaldehyde, stretching the spun filaments in the bath, stretching them further in a second dilute aqueous acid bath at high temperature, and then completing the regeneration of the cellulose without allowing the filaments to relax, either by winding them and subjecting the wound filaments to treatment in aqueous acid while in wound condition, or by treating them in a third acid bath and thereafter cutting them to staple fibre. Preferably the degree of polymerization of the cellulose is between 500 and 800, the Y-value of the viscose is between 50 and 80 and its viscosity at 15 DEG C. between 200 and 400 poises. The viscosity of the viscose and the degree of polymerization of the cellulose contained therein are determined on the viscose at the time of spinning. The viscose may also contain 1-40 g./kg. of formaldehyde and a modifier which is an amine, polyamine, a polyoxyalkylene compound or a condensation product of an amine and a dithiocarbamate in a proportion of 0,3-10% by weight relative to the alpha cellulose content of the viscose. The coagulating bath may also contain a modifier which is an amine, a polyamine, a polyoxyalkylene compound or a dithio-carbamate, in a proportion of 0,1 to 10 g./l. Specified coagulating bath temperatures range from 45 DEG -55 DEG C. The filaments may be stretched 30-50% in the coagulating bath, and further stretched by 60-120% in the second bath. In spinning continuous filaments, the spun filaments may be wound on bobbins and allowed to remain thereon in contact with acid until the Y-value is sufficiently reduced. In making staple fibres, the bundle of filaments emerging from the second bath may be freed of carbon disulphide and fixed under tension in a hot acid bath and cut to staple fibre. Filaments so made have an elongation less than 10% both in the dry state and in the wet state, and a very high modulus (3,25% elongation in the wet state under a tension of 0,5 g./denier). They have at least 80% skin and show secondary swelling between 50% and 80%.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR825045A FR1264504A (en) | 1960-04-22 | 1960-04-22 | Washable regenerated cellulose yarns and fibers with high dimensional stability |
Publications (1)
Publication Number | Publication Date |
---|---|
GB928770A true GB928770A (en) | 1963-06-12 |
Family
ID=8729849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13840/61A Expired GB928770A (en) | 1960-04-22 | 1961-04-17 | Production of regenerated cellulose materials |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE602661A (en) |
ES (1) | ES267073A1 (en) |
FR (1) | FR1264504A (en) |
GB (1) | GB928770A (en) |
NL (1) | NL263919A (en) |
-
0
- NL NL263919D patent/NL263919A/xx unknown
-
1960
- 1960-04-22 FR FR825045A patent/FR1264504A/en not_active Expired
-
1961
- 1961-04-17 BE BE602661A patent/BE602661A/en unknown
- 1961-04-17 GB GB13840/61A patent/GB928770A/en not_active Expired
- 1961-04-20 ES ES0267073A patent/ES267073A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES267073A1 (en) | 1961-07-16 |
FR1264504A (en) | 1961-06-23 |
NL263919A (en) | |
BE602661A (en) | 1961-08-16 |
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