DE961287C - Process for the production of tubular hollow threads from copper oxide-ammonia-cellulose solutions - Google Patents
Process for the production of tubular hollow threads from copper oxide-ammonia-cellulose solutionsInfo
- Publication number
- DE961287C DE961287C DEF9786A DEF0009786A DE961287C DE 961287 C DE961287 C DE 961287C DE F9786 A DEF9786 A DE F9786A DE F0009786 A DEF0009786 A DE F0009786A DE 961287 C DE961287 C DE 961287C
- Authority
- DE
- Germany
- Prior art keywords
- ammonia
- copper oxide
- production
- tubular hollow
- cellulose
- 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
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Description
Verfahren zur Herstellung von schlauchartigen Hohlfäden aus Kupferoxyd-Ammoniak-Cellulose-Lösungen Es ist bekannt, Hohlgebilde aus Cellulosederivatlösung herzustellen. Es ist ferner aus der deutschen' Patentschrift 498 158 und der britischen Patentschrift 249 845 bekannt, Kupferoxyd-Ammoniak-Cellulose-Lös.ungen in heiße alkalische (ammoniakhaltige) Bäder zu verspinnen. Aus der USA.-Patentschrift 2216793 ist es bekannt, Kupferoxyd-Ammoniak-Cellulose-Lösungen zunächst in ein heißes Wasserbad und anschließend. in stark alkalische Bäder zü verspinnen.Process for the production of tubular hollow fibers from copper oxide-ammonia-cellulose solutions It is known to produce hollow structures from cellulose derivative solution. It is further from German patent specification 498 158 and British patent specification 249 845 known, copper oxide-ammonia-cellulose solutions in hot alkaline (ammonia-containing) Spin baths. From US Pat. No. 2216793 it is known to use copper oxide-ammonia-cellulose solutions first in a hot water bath and then. zü in strongly alkaline baths spin.
Diese bekannten Spinnverfahren führten nicht zu Hohlgebilden', da die zunächst verwendeten Fällbäder nicht genügend alkalisch oder nicht heiß genug waren, um. den gewünschten Effekt der Bildung von Hohlfäden hervorzurufen. Es wurde nun gefunden, daß man Lösungen von Cellulose in Kupferoxyd-Ammoniak dadurch zu Hohlgebilden verspinnen kann, wenn man die Celulloselösung in ein stark alkalisches Spinnbad eintreten läßt, dessen Temperatur so hoch gewählt ist, daß das in der Lösung enthaltene Ammoniak den Faden zu einem Schlauch aufbläht. Spinnt man einen Cellulosefaden aus Kupferoxyd-Ammoniak-Lösung in Natronlauge, so wird er zunächst an der Oberfläche gefällt. Es bildet sich eine Cellulosehaut, die im Inneren noch nicht koagulierte Lösung enthält. Erhöht man nun die Spinntemperatur der Fällbäder so, daß das in der noch nicht koagulierten Lösung enthaltene Ammoniak vergast, so kann das Ainmoniakgas durch die gefällte Cellulosehaut nicht mehr entweichen, sondern bläht diese zu einem schlauchartigen Hohlfaden auf. Vom Querschnitt der Düse ist der Effekt unabhängig. Abhängig ist er dagegen unter anderem vom Ammoniakgehalt der Spinnlösung, von der Temperatur und der Natronlaugekonzentration dies Spinnbades und von der Länge der Fällstrecke. Breispiel Aus einer runden, rechteckigen oder einer Spinndüse mit anderer Querschnittsform läßt man eine von einer Spinnpumpe geförderte bekannte Menge einer Celluloselösung in Kupferoxyd-Ammoniak in eine 70° heißes Natronlaugebad mit io°/oiger Natronlauge eintreten. Die heiße Lauge befindet sich .irr einer 4 m langen V2 A-Rinne. Nachdem der Faden I bis z m durch die Lauge -gelaufen ist, bläht er sich auf; es entsteht ein schlauchartiger Hohlfaden, der von einem Abzugsorgan aufgenommen und in der üblichen Weise mit Säure kupferfrei, mit Wasser säurefrei gewaschen wird.These known spinning processes did not lead to hollow structures, since the precipitation baths initially used were not sufficiently alkaline or not hot enough to. to produce the desired effect of the formation of hollow fibers. It has now been found that solutions of cellulose in copper oxide-ammonia can be spun into hollow structures if the cellulose solution is allowed to enter a strongly alkaline spinning bath, the temperature of which is selected so high that the ammonia contained in the solution forms the thread into one Hose inflates. If a cellulose thread is spun from a copper oxide-ammonia solution in sodium hydroxide solution, it is first precipitated on the surface. A cellulose skin forms which contains a solution that has not yet coagulated inside. If the spinning temperature of the precipitation baths is increased so that the ammonia contained in the not yet coagulated solution is gasified, the ammonia gas can no longer escape through the precipitated cellulose skin, but rather expands it to form a tubular hollow thread. The effect is independent of the cross-section of the nozzle. On the other hand, it depends, among other things, on the ammonia content of the spinning solution, on the temperature and the sodium hydroxide concentration of the spinning bath and on the length of the felling path. Example From a round, rectangular or a spinneret with a different cross-sectional shape, a known amount of a cellulose solution in copper oxide-ammonia conveyed by a spinning pump is allowed to enter a 70 ° hot sodium hydroxide bath with 10% sodium hydroxide solution. The hot lye is located in a 4 m long V2 A gutter. After the thread 1 has run through the lye - it puffs up; The result is a tube-like hollow thread which is picked up by a take-off device and washed free of copper in the usual way with acid and acid-free with water.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF9786A DE961287C (en) | 1952-08-28 | 1952-08-28 | Process for the production of tubular hollow threads from copper oxide-ammonia-cellulose solutions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF9786A DE961287C (en) | 1952-08-28 | 1952-08-28 | Process for the production of tubular hollow threads from copper oxide-ammonia-cellulose solutions |
Publications (1)
Publication Number | Publication Date |
---|---|
DE961287C true DE961287C (en) | 1957-04-04 |
Family
ID=7086256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEF9786A Expired DE961287C (en) | 1952-08-28 | 1952-08-28 | Process for the production of tubular hollow threads from copper oxide-ammonia-cellulose solutions |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE961287C (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB249845A (en) * | 1925-03-26 | 1927-05-12 | Wanda Schulz | An improved method of manufacturing cuprammonium silk threads |
DE496085C (en) * | 1925-11-11 | 1930-04-12 | Fabrication De La Soie Rhodias | Process for the production of hollow rayon threads by the dry spinning process |
DE569038C (en) * | 1928-02-19 | 1933-01-27 | Hellmut Schupp Dr Ing | Dry spinning process for the production of acetate silk |
US2216793A (en) * | 1937-02-04 | 1940-10-08 | Celanese Corp | Manufacture of colored artificial materials |
-
1952
- 1952-08-28 DE DEF9786A patent/DE961287C/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB249845A (en) * | 1925-03-26 | 1927-05-12 | Wanda Schulz | An improved method of manufacturing cuprammonium silk threads |
DE498158C (en) * | 1925-03-26 | 1930-05-19 | J P Bemberg Akt Ges | Process for the production of artificial threads from copper oxide ammonia cellulose solutions |
DE496085C (en) * | 1925-11-11 | 1930-04-12 | Fabrication De La Soie Rhodias | Process for the production of hollow rayon threads by the dry spinning process |
DE569038C (en) * | 1928-02-19 | 1933-01-27 | Hellmut Schupp Dr Ing | Dry spinning process for the production of acetate silk |
US2216793A (en) * | 1937-02-04 | 1940-10-08 | Celanese Corp | Manufacture of colored artificial materials |
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