GB829869A - Improvements in and relating to the production of regenerated cellulose filaments - Google Patents
Improvements in and relating to the production of regenerated cellulose filamentsInfo
- Publication number
- GB829869A GB829869A GB1503955A GB1503955A GB829869A GB 829869 A GB829869 A GB 829869A GB 1503955 A GB1503955 A GB 1503955A GB 1503955 A GB1503955 A GB 1503955A GB 829869 A GB829869 A GB 829869A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filaments
- bath
- aqueous
- acid
- regenerating
- 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
Abstract
Regenerated cellulose filaments capable of developing a crimp upon subsequent relaxation in an aqueous liquid are produced by extruding viscose into an aqueous acid coagulating and regenerating bath containing sulphuric acid and at least 16% of sodium and zinc sulphates, and conducting the filaments through the bath for a length of time approximately equal to that throughout which the liquid absorbed by the filaments remains alkaline or neutral, after which excess liquid is stripped from the filaments emerging from the bath and the filaments then pass through an aqueous acid regenerating bath in which or after which they are highly stretched. The neutral point is determined by carrying out a preliminary experiment in which bromcresol purple indicator is added to the viscose, the point at which the filaments change in colour from purple to yellow is observed, and the path length corresponding to this neutral point is measured. No indicator is used in the commercial production of filaments according to the invention. The first bath preferably contains at least 20% of sodium sulphate while the regenerating bath preferably contains less than 12% of acid and less than 16% of total salts. The bath in which the filaments are subsequently relaxed to impart to them a permanent crimp may be water or aqueous dilute acid or alkali. The degree of stretching is preferably at least 35%. The filaments may be cut into staple before or after the relaxing step. In an example, in which the path length corresponding to the neutral point is determined in a preliminary experiment as described above, and in which this path length is not exceeded, viscose is spun into an aqueous coagulating and regenerating bath at a temperature of 50 DEG C. containing 9.5% of sulphuric acid, 24% of sodium sulphate and 0.8% of zinc sulphate. The filaments are then conducted from the bath over a guide to strip off excess liquid and through an aqueous regenerating bath containing 5% of sulphuric acid, 6% of sodium sulphate and a very small percentage of zinc sulphate. The filaments are stretched 50% after removal from the regenerating bath and allowed to relax in a water bath.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1503955A GB829869A (en) | 1955-05-25 | 1955-05-25 | Improvements in and relating to the production of regenerated cellulose filaments |
| FR1150247D FR1150247A (en) | 1955-05-25 | 1956-05-25 | Process for the production of regenerated cellulose filaments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1503955A GB829869A (en) | 1955-05-25 | 1955-05-25 | Improvements in and relating to the production of regenerated cellulose filaments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB829869A true GB829869A (en) | 1960-03-09 |
Family
ID=10051969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1503955A Expired GB829869A (en) | 1955-05-25 | 1955-05-25 | Improvements in and relating to the production of regenerated cellulose filaments |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1150247A (en) |
| GB (1) | GB829869A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009006131A1 (en) * | 2007-06-29 | 2009-01-08 | 3M Innovative Properties Company | An indicating fiber |
| US8329851B2 (en) | 2007-06-29 | 2012-12-11 | 3M Innovative Properties Company | Functional polymer with a pendant color changing indicator |
-
1955
- 1955-05-25 GB GB1503955A patent/GB829869A/en not_active Expired
-
1956
- 1956-05-25 FR FR1150247D patent/FR1150247A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009006131A1 (en) * | 2007-06-29 | 2009-01-08 | 3M Innovative Properties Company | An indicating fiber |
| US8329851B2 (en) | 2007-06-29 | 2012-12-11 | 3M Innovative Properties Company | Functional polymer with a pendant color changing indicator |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1150247A (en) | 1958-01-09 |
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