METHOD FOR PRODUCING DOUBLE-TWISTED COTTON YARN ON SPINNING AND TWISTING MACHINE Russian patent published in 2023 - IPC D02G3/04 

FIELD: textile industry.

SUBSTANCE: invention can be used to produce cotton spun yarn based on the inclusion of short flax fibre in the fibre mixture at the stage of preparing the semi-finished product for spinning. In this method, a false torsion is applied to the spinning strand coming out of the drawing device of the machine, the connected strands are introduced into the axial channel of the spindle from its upper end, twisted with the spindle in its axial channel into a twisted thread and wound it onto the receiving package. As the spinning strand coming out of the drawing machine, a thread obtained from a roving with the following composition is used: cotton fibre - from 30 to 60 wt.% and short flax fibre - from 40 to 70 wt.%. In this case, the linear density of the roving varies in the range of 400–627 tex, and cotton yarn with a linear density of 18.5–29 tex is used as the strand coming off the rotating package. As a result, double-twisted cotton yarn is obtained with a linear density of 18.5 × 2 tex to 29 × 2 tex containing cotton fibre 65-80 wt.% and short flax fibre 20-35 wt.%.

EFFECT: invention makes it possible to expand technical and assortment capabilities by producing double twisted cotton thread using short flax fibre.

1 cl, 5 dwg, 7 ex