EFFECT OF WINDING SPEED ON SOME YARN QUALITY PARAMETERS AFTER WINDING

Abstract

This article presents the results of experimental research to determine the
effect of winding speed on some quality parameters of yarn after winding,
including: Unevenness U%, coefficient of variation (CV%), imperfection index
(IPI) and yarn hairiness H. The study was performed with two types of yarn: Ne
30/1 CVCM (Chief Value of Combed Cotton), Ne 30/1 COCM (Combed Cotton), yarn
quality parameters were measured by Uster Tester 5, the measurement results
achieved high accuracy.
The study shows that the value of yarn quality parameters after winding
increases while increasing of winding speed, the relationship between yarn quality
parameters and winding speed is linear functions with a high correlation coefficient
(R2
> 0.8). Notably, the hairiness of the yarn after winding has increased sharply.
When the winding speed increased twice (from 600 m/min to 1200 m/min), the
hairiness increased by 1.13 times (from 29.55% to 33.33% with Ne 30/1 CVCM yarn),
an increase of 1.18 times (from 23.33% to 27.72% with Ne 30/1 COCM). This is also
considered to be the loss of yarn quality in terms of hairiness as the winding speed
increases.