A study on the relationship between irregularity and hairiness of spun yarns

Abstract

In this study, Photoshop software was used to do image analysis on the photos of spun yarns. The result showed that yarn could be divided into two parts: the surface hairs and the stem. Based on this finding, a mathematical model of yarn unevenness was built to analyze the relationship between yarn unevenness and surface hairiness. The relationships among the coefficients of mass variance of the yarn, the stem and the surface hairs, expressed as CV t , CV s and CV h , respectively, were investigated in detail. Results indicate that the CV s of an uneven yarn always coincides with the irregularity of the yarn hairiness. More specifically, the CV t of a yarn cannot be better than those of both yarn hairiness and stem (CV h and CV s ), even if one of them is excessive. It is rare for CV t to be higher than CV s after removal of yarn hairs. In particular, it is irrational for the CV t value to be higher than both CV s and CV h , which prompts a rethinking of the exact distribution of yarn hairs on the yarn body.

Color mixture model of seven primary color fiber grid blending and rotor spinning of full-color gamut mixed color yarn

“…The testing speed was 30 m/min, the segment length was 10 m, and 10 segment lengths were tested. 21–23 The YS6010 spectrophotometer produced by Shenzhen Threenh Technology Co., Ltd. (Shenzhen, China) was selected to test the color value of knitted fabric of mixed color yarns. During sample testing, D65 light source, 10° field of view, 25.4 mm aperture and SCI mode were used, and the average value was taken for five tests of each sample.…”

“…The testing speed was 30 m/min, the segment length was 10 m, and 10 segment lengths were tested. [21][22][23] The YS6010 spectrophotometer produced by Shenzhen Threenh Technology Co., Ltd. (Shenzhen, China) was selected to test the color value…”

Construction of color solid by gridded color mixing of nine primary colored fibers and spinning of full color gamut yarn

“…The YG133B/ Pro-H evenness tester was applied to measure the yarn evenness with a testing speed of 400 m/min and a yarn length of 400 m, following the standard ISO 16549:2004. 15 The surface hairiness was performed on the Y172A yarn hairiness tester at a speed of 30 m/min with a fragment length of 10 m, and each proportion of yarn was tested 10 times, following the Chinese textile industry standard (CN) FZ/T 01086-2000. [16][17][18] The tensile properties were tested by adopting a XL-2 single-yarn tensile tester, and each yarn was tested 20 times at a speed of 500 mm/min, a gauge length of 500 mm and a pre-tension of 9.0 cN.…”