AT28151B - Method of making shiny threads. - Google Patents

Method of making shiny threads.

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Publication number
AT28151B
AT28151B AT28151DA AT28151B AT 28151 B AT28151 B AT 28151B AT 28151D A AT28151D A AT 28151DA AT 28151 B AT28151 B AT 28151B
Authority
AT
Austria
Prior art keywords
cellulose
threads
solutions
shiny threads
thread
Prior art date
Application number
Other languages
German (de)
Original Assignee
Hoechst Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoechst Ag filed Critical Hoechst Ag
Application granted granted Critical
Publication of AT28151B publication Critical patent/AT28151B/en

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  • Artificial Filaments (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Herstellung   glänzender   Fäden. 



   Es sind schon Verfahren bekannt, die es ermöglichen, aus Zellulose glänzende Faden herzustellen. So die Verfahren von Despaisis und Pauly, welche chemisch darauf beruhen, 
 EMI1.1 
 



   Demgegenüber wurde nun gefunden. dass die sogenannten Kuprammonium-Zelluloselösungen auch in glänzende Fäden verarbeitet werden können, indem man sie durch feinste kapillare Öffnungen nicht in Säuren, sondern in Lösungen von Ätzalkalien austreten lässt. 



  Der entstehende Faden wird aufgewunden, sodann sukzessive mit Säuren und Wasser gewaschen und schliesslich getrocknet. 



   Es findet somit eine Fällung der Kuprammonium-Zelluloselösung durch Alkalien statt. 



  Der scheinbare Widerspruch, der demgegenüber in der Angabe liegt, dass das in KuprammoniumZelluloselösungen enthaltene Hydratationsprodukt in Alkalien löslich ist. findet seine Erklärung darin, dass die durch Ätzalkali in der Kuprammonium-Zelluloselösung entstehende Fällung nicht Zellulose oder ein   Hydratationsprodukt derselben   als solches ist,   sondt'rn     vte ! n) ehr   eine kupferhaltige Verbindung. 



   Der, wie angegeben, in einen elastischen Faden formieren   kupferhaltigen Verbindung   wird durch Säure das Kupfer entzogen, ohne dass der Faden in seiner Stabilität   :, in   Der mit Wasser gewaschene und dann getrocknete Faden zeichnet sich durch Feinheit. 



  Glanz und Stabilität auch in   feuchtem   Zustande aus. 



   An Stelle der Lösung von Zellulose in Kuprommoniumlösungen, wie Kupferoxyd-   ammoniak   und Kupferkarbonatammoniak, kann man diejenigen verwenden, die vermittelst der Hydratationsprodukte der Zellulose, in der chemischen Literatur meist als Hydrozellulose oder Zellulosehydrat bezeichnet, erhalten werden. 



   Die Konzentration der zur Fällung der Kuprammonium-Zelluloselösung dienenden Alkalilösungen kann innerhalb weiter Grenzen gewählt werden, auch mit   Seiger Natron-   lauge kann man noch einen haltbaren Faden erhalten, wenn die Konzentration   der zit   fällenden Zelluloselösung nicht zu   klein ist. Grosse Konzentration   der   Alkalilösung   ist nur günstig. Je enger die Kapillaren genommen werden, um so feinere Fäden werden erhalten. 



   Ein beispiel für das Verfahren ist folgendes   :   Man verwendet eine   5O/oige Auflösung   
 EMI1.2 
   vorbeifliesst.   Der entstehende Faden wird sofort auf eine rotierende Trommel   aufgenommen,   mit Wasser abgespült, dann sukzessive mit 120,   Schwefelsäure und   mit Wasser gewaschen und schliesslich getrocknet. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Method of making shiny threads.



   Processes are already known which make it possible to produce shiny threads from cellulose. So the processes of Despaisis and Pauly, which are chemically based on
 EMI1.1
 



   In contrast, it has now been found. that the so-called cuprammonium cellulose solutions can also be processed into shiny threads by letting them escape through the finest capillary openings not in acids but in solutions of caustic alkalis.



  The resulting thread is wound up, then washed successively with acids and water and finally dried.



   Thus, the cuprammonium cellulose solution is precipitated by alkalis.



  The apparent contradiction that lies in the statement that the hydration product contained in cuprammonium cellulose solutions is soluble in alkalis. finds its explanation in the fact that the precipitate produced by caustic alkali in the cuprammonium-cellulose solution is not cellulose or a hydration product of the same as such, probes! n) or rather a copper-containing compound.



   The copper-containing compound, which is formed into an elastic thread as indicated, is removed by acid, without affecting the stability of the thread: The thread washed with water and then dried is characterized by delicacy.



  Shine and stability even when damp.



   Instead of the solution of cellulose in cuprommonium solutions, such as copper oxide ammonia and copper carbonate ammonia, one can use those which are obtained by means of the hydration products of cellulose, usually referred to in the chemical literature as hydrocellulose or cellulose hydrate.



   The concentration of the alkali solutions used to precipitate the cuprammonium cellulose solution can be chosen within wide limits, even with Seiger caustic soda you can still get a durable thread if the concentration of the cellulose solution that is precipitated is not too small. High concentration of the alkali solution is only beneficial. The narrower the capillaries, the finer the filaments.



   An example of the method is as follows: A 50% resolution is used
 EMI1.2
   flow past. The resulting thread is immediately taken up on a rotating drum, rinsed with water, then washed successively with 120% sulfuric acid and with water and finally dried.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT. ANSPRUCH : Verfahren zur Herstellung glänzender Fäden aus Lösungen von ZcHulose oder deren EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT. CLAIM : Process for the production of shiny threads from solutions of ZcHulose or their EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT28151D 1904-10-31 1904-10-31 Method of making shiny threads. AT28151B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT28151T 1904-10-31

Publications (1)

Publication Number Publication Date
AT28151B true AT28151B (en) 1907-04-25

Family

ID=3540719

Family Applications (1)

Application Number Title Priority Date Filing Date
AT28151D AT28151B (en) 1904-10-31 1904-10-31 Method of making shiny threads.

Country Status (1)

Country Link
AT (1) AT28151B (en)

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