Factors Affecting the Wale Skewness of Cotton Plain-Knitted Fabrics Made from Plied-Yarn

Abstract

The effects of some factors on the wale skewness of cotton plain-knitted fabrics made from three-fold are investigated experimentally.
The results obtained are as follow :
(1) The causes of the wale skewness (WS) is devided into two factors : yarn torque and knitting procedure. The following equation is empirically derived.
WS (%) = {(a√l+b) S_n+c/l+d} (1)
where S_n is the number of snarling, l is the loop length (mm), and a, b, c and d are constants.Let S_n and WS of the direction-z be plus and the direction-S be minus.
(2) The values calculated from the equation (1) agree well with the experimental values.
(3) It seems that the wale skewness knitting procedure is likely to be dependent on the phenomenon of procedure “robbing-back”.
(4) The values of c and d depend on the r. p. m. of knitting machine and the relaxed treatments.