GB509702A - Improvements in or relating to the production of shaped articles from cellulose acetate - Google Patents
Improvements in or relating to the production of shaped articles from cellulose acetateInfo
- Publication number
- GB509702A GB509702A GB1772/38A GB177238A GB509702A GB 509702 A GB509702 A GB 509702A GB 1772/38 A GB1772/38 A GB 1772/38A GB 177238 A GB177238 A GB 177238A GB 509702 A GB509702 A GB 509702A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose acetate
- per cent
- solution
- filaments
- spinning
- 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
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
- D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
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
509,702. Artificial filaments, ribbons &c. I.G. FARBENINDUSTRIE AKT.-GES. Jan. 19, 1938, No. 1772. Convention date, Jan. 19, 1937. [Class 2 (ii)] Filaments, threads, filaments, bands &c. are made from cellulose acetate soluble in chloroform by spinning a crude acetic acid solution of the cellulose acetate at an elevated temperature into an aqueous inorganic salt solution at a lower temperature. The crude cellulose acetate solution may be those produced by the usual acetylation processes, preferably those employing only small amounts of catalyst, e.g., sulphuric acid as described in Specification 337,366, [Class 2 (ii)]. The acetic acid content of the cellulose acetate may vary between 59-62.5 per cent. and is preferably between 60-61.5 per cent., the cellulose acetate as first obtained being subjected to a slight hydrolysis. Before spinning the acetylation catalyst is neutralized and the crude cellulose acetate solution is brought to a suitable cellulose acetate content-preferably 12-16 per cent. ; it is stated that a small content 2-6 per cent. of methylene chloride and water has a beneficial effect in the spinning process. The cellulose acetate spinning solution is then heated to 50-90‹C. depending on the viscosity of the solution, the higher viscosities necessitating higher temperatures. The coagulating bath may consist of solutions of sodium sulphate, sodium chloride, sodium acetate, calcium chloride, and ammonium salts such as the chloride, sulphate or acetate ; the concentration may be 10-30 per cent. and the temperature below about 30 ‹C. The coagulating liquid is preferably caused to act on the precipitated filaments in counter current, the quantity and velocity thereof being so chosen that the acetic acid content of the precipitating liquid increases up to 15-30 per cent. Specifications 341,148 and 418,480 also are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE509702X | 1937-01-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB509702A true GB509702A (en) | 1939-07-19 |
Family
ID=6547275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1772/38A Expired GB509702A (en) | 1937-01-19 | 1938-01-19 | Improvements in or relating to the production of shaped articles from cellulose acetate |
Country Status (3)
Country | Link |
---|---|
US (1) | US2218029A (en) |
GB (1) | GB509702A (en) |
NL (1) | NL46526C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE937970C (en) * | 1948-11-24 | 1956-01-19 | Courtaulds Ltd | Process for the production of threads or staple fibers from secondary cellulose acetate |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB673654A (en) * | 1949-02-23 | 1952-06-11 | British Celanese | Improvements in the manufacture of water-soluble filaments, films and the like from cellulose ethers |
US2824035A (en) * | 1954-01-12 | 1958-02-18 | British Celanese | Process of making stiffened composite fabrics |
-
0
- NL NL46526D patent/NL46526C/xx active
-
1938
- 1938-01-14 US US184968A patent/US2218029A/en not_active Expired - Lifetime
- 1938-01-19 GB GB1772/38A patent/GB509702A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE937970C (en) * | 1948-11-24 | 1956-01-19 | Courtaulds Ltd | Process for the production of threads or staple fibers from secondary cellulose acetate |
Also Published As
Publication number | Publication date |
---|---|
US2218029A (en) | 1940-10-15 |
NL46526C (en) |
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