AT148819B - Process for the production of wool substitute fibers from viscose. - Google Patents

Description

  

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  Process for the production of WoüersaMäsera from viscose.



   It is known to produce water- or alkali-soluble xanthate threads from viscose and only decompose the xanthate threads into cellulose in a second bath. The decomposition of the water-soluble thread by means of mineral acids is carried out either on the running thread or on the winding element. For the production of staple fibers, it has already been proposed to cut off the xanthate threads spun from viscose from the winding element and to decompose the thread mass into cellulose fibers by placing it in an acid bath.



   In the process of the present invention, the xanthate threads of a large number of spinnerets, spun in a known manner in ammonium sulfate solutions, organic acid solutions or very dilute mineral acids, are to be combined into a strong fiber sliver of several 1000 deniers and fed to a cutting machine. The strong strips cut into stacks are then subjected to a flushing process in dilute mineral acids, whereby
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 Sulfuric acid still contains 120po sodium sulfate.

   In order to achieve a good distribution of the cut staple lengths in individual fibers, the thread mass distributed in the decomposition bath, for example, is passed through one or more towers e, e, in which baffles i are installed for breaking the fiber bundle. At the lower end of each tower, the thread mass is applied to a revolving, endless conveyor sieve g and thereby separated from the decomposition liquid. The conveyor sieve
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 Distribution to a further tower e2 with built-in baffles, in which the fibers are freed from the adhering decomposition bath by washing with water. The fiber fleece is fed in the same way to all treatment baths required for finishing.

   At the end of the various conveyor sieves, the fiber mass is expediently passed between nip rollers A in order to squeeze out the sucked up liquid. Finally, the fiber fleece passes one on conveyor belts
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 an additional sprinkling of treatment liquids can be carried out on the conveyor sieves.



   The treatment liquids are collected in troughs & under the conveyor sieves, adjusted to the original concentration in vats 1 and fed back to the treatment points with pumps.



   The product of the process described is a staple fiber in fleece form with good, wool-like crimp, which is particularly well suited for spinning.



   PATENT CLAIMS:
1. A process for the production of wool substitute fibers from viscose, characterized in that endless, strong fiber ribbons of xanthate threads are cut into stacks, the sections of the xanthate thread are mechanically whipped with decomposition to cellulose hydrate in acidic bath liquids or opened by flow processes and then the individual aftertreatment baths in an uninterrupted operation are fed.

 

Claims (1)

2. The method according to claim 1, characterized in that baths are used as the decomposition liquid, the oxidizing agents such. B. Activin, hypochlorous acid or hydrogen peroxide contain. 3. The method according to claims 1 and 2, characterized in that the fiber sections or the pressed-out nonwovens are loosened in the acid decomposition bath and each of the subsequent washing and aftertreatment baths by vigorously moving liquid flows. EMI2.4