DE210280C - - Google Patents

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PATENT LETTERING

- JVl 210280 - ^ CLASS 29 «. GROUP

PIERRE FÜLLET and GODEFROID DITZLER in VERVIERS, Belg.

Method and device for the production of artificial silk threads from cellulose or other textile solutions.

Patented in the German Empire on July 14, 1908.

In the manufacture of artificial silk from a dissolution of cellulose in an ammoniacal one Copper oxide solution is used to stretch the filaments formed to a certain extent as they emerge from the spinneret to subjugate what is made possible by the fact that the coagulation of the thread is just beginning at the moment of rolling onto one in one, a precipitating liquid (e.g. an acid bath) containing container rotating coil happens. This common practice offers the disadvantage that there is only a very slight extension of the thread formed can and also the separate washing out of the thread by rinsing it out on special washing machines must take place.

The present invention has for its object a method for the treatment of Threads of all kinds produced by dissolving cellulose, fibroin, or any other similar Substance can be obtained in an ammoniacal oxide or suitable metal salt solution. The method has the important advantage over the known method that the threads, depending on the desired fineness, are consecutive and graduated extensions, and that further by treatment with decreasing strength Precipitation baths immediately create a thread without any after-treatment, which at the moment of its rolling up on the Bobbin is completely washed and cleaned.

This method is carried out on a device in which the thread at its exit from the spinneret after partial extraction to one or more with Coagulation baths with partial or weakening effect reaches rollers, whereby a certain pressure is exerted on the thread by said rollers, in such a way that that from it the separation of the not yet coagulated mass is brought about will. The rollers rotate at different peripheral speeds to simultaneously to cause the not yet fully coagulated thread to stretch out.

Under these conditions, the coagulation baths can have the opposite effect of the one that has taken place so far, d. H. become weaker, in such a way that one The process can be ended by applying the thread to rollers wetted with clear water, creating a thorough Cleaning or washing the thread before it is finally wound onto the bobbin he follows.

For a better understanding of the invention, the following is an application of this new one The method is described and the drawing shows the arrangement of a schematic for execution the same mating spinning device illustrated.

α denotes a frame with support arms b provided on one side, on which shafts c and on these rollers d are attached, which in

Claims (2)

The shafts c as well as the rollers d are attached to the support arms b along with the basin e in such a way that they assume different positions on the latter, ie can be moved forwards or backwards, as shown in dotted lines shown in the drawing. The rollers d and their shafts c are driven by hand in order to be able to change the rotational speeds. As a result of turning in the basin e and continuous immersion in the liquid contained therein, these rollers cover themselves with a thin layer of the- .15 same. Under the lowermost roller d there is a container / in which the spinnerets g open, into which the cellulose solution is pressed in a known manner. The vessel / contains a coagulation bath of uniform effect with z. B. an acid content of 15 to 20 percent. The basins e have similar baths, the acidity of which decreases from the lowest to the uppermost, so that the latter only contains pure water in which a spool rotates on which the thread is wound. The latter, which emerges from the nozzle g, first coagulates in the bath of the vessel / and then passes over the various rollers d before running onto the bobbin h. Since the thread emerging from the nozzle g very quickly passes through the bath of the vessel /, it only coagulates on the outside, while its inside remains liquid and not. is felled. The thread then arrives at the rollers d, where it (see drawing) is subjected to a tension that changes depending on the angle formed by the various rollers with respect to one another. This latter creates a pressure in the interior of the thread, which results in a partial squeezing out of the still liquid part. As this liquid part now comes into contact with the already coagulated outside under pressure, the latter is somewhat softened and the thread is stretched out under the effect of the different speeds of rotation of the rollers d as long as the inside of the thread still contains some liquid. The substances squeezed out under the pressure together with the tension exerted coagulate as they pass over the rollers d, namely under the action of the coagulation bath, which is carried along by the rotation of the rollers onto the surface of the same. . To the extent that! As the thread approaches the bobbin h , its coagulation or precipitation is completed in the presence of the precipitation baths, which become more and more weaker. When being rolled up on the bobbin h , the threads are washed in completely pure water. The stretching exerted on it before winding the thread onto the washout rollers or onto the bobbin h can change after removal and depend on the different speeds of the rollers d, the different layers given to them and the greater or lesser concentration of the felling baths in which immerse the rollers d. '' The method described above combines the following advantages: It allows the threads of cellulose as the main component or of other similar ones To subject materials to many successive expressions. It allows the freshly formed threads to be washed out when leaving the precipitation baths and before being rolled up onto the bobbins, where- through the thread immediately of the excess acid and coagulation bath which the Cellulose harms, is freed. By successive extensions as well as the- elimination of each harmful one The effect of the precipitation baths is on the one hand the fineness of the threads and on the other hand the strength the same increased so that the fibers obtained are much more like the fibers of the natural Approach silk than is the case with the previously common method. Ρλ τ μ ν τ - A κ s ν κ i "; c 11 ε: ι. Process for the production of artificial silk threads from cellulose or other Textile fabric solutions, characterized in that the threads after exit from the spinnerets with continued extension of the action of a number exposed to increasing precipitation baths in strength and in the last place be washed out with pure water, 2. Apparatus for carrying out the method according to claim 1, characterized by several rollers rotating at different peripheral speeds, which are inserted into those containing the precipitating liquids Immerse basins and are arranged adjustable to one another with the associated basins 1 sheet of drawings.