GB352445A - Improved treatment of artificial threads and films made from cellulose esters and ethers - Google Patents
Improved treatment of artificial threads and films made from cellulose esters and ethersInfo
- Publication number
- GB352445A GB352445A GB708/30A GB70830A GB352445A GB 352445 A GB352445 A GB 352445A GB 708/30 A GB708/30 A GB 708/30A GB 70830 A GB70830 A GB 70830A GB 352445 A GB352445 A GB 352445A
- Authority
- GB
- United Kingdom
- Prior art keywords
- threads
- stretching
- per cent
- treatment
- swelling
- 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)
- Materials For Medical Uses (AREA)
Abstract
The tensile strength of artificial threads and films made from cellulose esters or ethers is improved by treatment of the finished threads &c. with a neutral organic swelling medium that is capable of producing a highly swollen condition of the thread &c. and a high degree of plasticity therein, and whilst maintaining contact with the swelling medium applying a gradual stretch to the thread or film until its length is increased to 200 per cent up to several 1000 per cent of its original length or even more. In addition to the increase of tensile strength which is evidenced by an improved X-ray structure, the threads &c. are simultaneously fined, and by reason of this it is possible to make fine strong threads from relatively coarse and cheap intermediate products. In the case of cellulose acetate silk, a suitable swelling medium is 50 per cent aqueous dioxane; and the treatment may be applied to such silk as prepared from spinning solutions containing dioxane. The improvement in the threads is assisted by the application of lateral pressure, as by rolling transversely of the direction of drawing to threads before, during or after the simultaneous swelling and stretching operations. The gloss and feel of the stitched threads depend to some extent upon the conditions of stretching and on the character of the after-treatment to which the threads are subjected, for example, according as they are washed with hot or cold water, or with methyl alcohol, or with sodium sulphate solution. The process may be applied to single threads or to twisted thread bundles, or to threads in the form of hanks, or even to fabrics, without any sticking together of the individual filaments taking place. In examples illustrating the stretching of cellulose acetate threads, the swelling medium consists of 50 per cent aqueous dioxane and acetone-carbon tetrachloride, the extent of the stretching varies from 2-3 up to 20 times the original length, and the duration of the stretching from 8-12 minutes. The treatment may be combined with other operations such as stapling, curling and colouring. The Specification as open to inspection under Sect. 91 (3) (a) refers to the employment of the swelling medium in the vapor phase, and to the application of the process to cellulose xanthogenate threads; and it contains other examples in which (1) cellulose acetate threads which have been soaked in 50 per cent aqueous dioxane are drawn to 30 times their length in 8 secs., (2) the drawn cellulose acetate threads are deacetylated in alcoholic potash lye to give regenerated cellulose threads showing a further improvement in tensile strength, or alternatively are deacetylated simultaneously with drawing by adding the deacetylation agent to the dioxane solution, (3) the drawing of the threads is assisted by passage through a Thiele funnel through which a current of mercury is flowing, and (4) the drawing is carried out in two stages, in the second of which deacetylation agents may be present in the swelling bath. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE352445X | 1929-02-18 | ||
DE352909X | 1929-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB352445A true GB352445A (en) | 1931-07-08 |
Family
ID=25833839
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB708/30A Expired GB352445A (en) | 1929-02-18 | 1930-01-08 | Improved treatment of artificial threads and films made from cellulose esters and ethers |
GB877/30A Expired GB352909A (en) | 1929-02-18 | 1930-01-09 | Improved manufacture of artificial threads or films |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB877/30A Expired GB352909A (en) | 1929-02-18 | 1930-01-09 | Improved manufacture of artificial threads or films |
Country Status (4)
Country | Link |
---|---|
US (1) | US2142389A (en) |
FR (1) | FR689481A (en) |
GB (2) | GB352445A (en) |
NL (1) | NL29445C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427054A (en) * | 1940-10-30 | 1947-09-09 | Celanee Corp Of America | Apparatus for stretching continuous filament textile material |
JPS51134813U (en) * | 1975-04-23 | 1976-10-30 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2454515A (en) * | 1938-10-29 | 1948-11-23 | Polaroid Corp | Light-polarizing sheet of molecularly oriented transparent linear high polymer dyed with dichroic substance and process of manufacture |
GB793527A (en) * | 1954-08-05 | 1958-04-16 | British Celanese | Improvements in the manufacture of cellulose acetate textile materials |
-
0
- NL NL29445D patent/NL29445C/xx active
-
1930
- 1930-01-08 GB GB708/30A patent/GB352445A/en not_active Expired
- 1930-01-09 GB GB877/30A patent/GB352909A/en not_active Expired
- 1930-01-17 US US421583A patent/US2142389A/en not_active Expired - Lifetime
- 1930-02-05 FR FR689481D patent/FR689481A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2427054A (en) * | 1940-10-30 | 1947-09-09 | Celanee Corp Of America | Apparatus for stretching continuous filament textile material |
JPS51134813U (en) * | 1975-04-23 | 1976-10-30 |
Also Published As
Publication number | Publication date |
---|---|
FR689481A (en) | 1930-09-08 |
US2142389A (en) | 1939-01-03 |
NL29445C (en) | |
GB352909A (en) | 1931-07-16 |
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