GB471313A - Improvements in and relating to the manufacture of fancy yarns - Google Patents

Abstract

<PICT:0471313/IV/1> Threads showing fancy effects due to differential shrinking of component yarns or threads are obtained by doubling finished textile yarns or threads of any origin with artificial silk filaments freshly produced from cuprammonium-cellulose solutions by a stretch spinning process, as they are leaving or shortly after they have left the spinning funnel and while they are still in the alkaline state before being acidified. The doubled yarn is then acidified, further twisted if desired, washed, and subjected to finishing treatments. Finished yarns or threads of cotton, linen, jute, wool, silk, artificial silk including viscose, cuprammonium, and cellulose acetate yarns, or other artificial yarns such as cellulose wool yarns may be doubled with the freshly produced artificial filaments. As shown, filaments 2 spun from cuprammonium cellulose solution leave the lower end of the funnel 3, pass through vessel 5 and are there associated with a finished textile thread 4. The combined thread 9 passes round roller 10 and wooden roller 11 where it is treated with dilute sulphuric acid and freed from copper. It is then led into a spinning pot 12 where it is twisted and wound. The speeds of rollers 10, 11 may be adjusted as desired, but preferably roller 11 is driven at a slower feeding speed than roller 10 in order to facilitate shrinkage of the artificial silk filaments with consequent formation of loops in the yarn of different kind. Instead of a centrifuge, rollers, spools or reels may be used for winding up the doubled yarn.