METHOD OF MANUFACTURING MULTITUDE OF HIGHLY STRONG, HIGH-MODULUS THREADS FROM AROMATIC POLYAMIDE Russian patent published in 2014 - IPC D01F6/74 D01F6/60 D01D5/14 D01D5/06 

FIELD: chemistry.

SUBSTANCE: method includes extrusion of, at least, 15 wt % acidic acid of aromatic polyamide through linearly located draw plate holes; passing thread the base through layer of non-coagulating flow medium into coagulating bath; passing thread cloth through spinning tube, injection of additional coagulating liquid near threads downward at angle from 15° to 75° with respect to threads at constant rate, constituting approximately 50-100% of the rate of threads, movement of supplied coagulating liquid down together with the base of threads through spinning tube into coagulating bath. Tube has elongated transverse section and contains, at least, two opposite sides, parallel to the base of threads, with the length of the sides being, at least, equal to the width of the base of threads. Coagulating liquid is injected through injector channel from any one side of spinning tube, parallel to the base of threads, where injector channel has, at least, the same width as the base of threads.

EFFECT: invention relates to technology of production of synthetic fibres, in particular, to production of multitude of highly strong, high-modulus threads from aromatic polyamide.

6 cl, 3 tbl, 3 ex