JOURNAL OF TEXTILE RESEARCH ›› 2017, Vol. 38 ›› Issue (12): 38-42.doi: 10.13475/j.fzxb.20161104805

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Comparison of yarn properties between compact Siro false twist yarn and compact Siro yarn

  

  • Received:2016-11-21 Revised:2017-07-06 Online:2017-12-15 Published:2017-12-18

Abstract:

To solve the problem of serious weft oblique bhenomenon of knitted fabric, using the hemp/ cotton (30/70) as raw material, two kinds of new spinning methods, compact Siro false twist spinning and compact sirospun, were introduced to produce the 15 tex yarn. Using visual analysis method and independent samples T test of the SPSS software, the significance analysis was carried out to compare the yarn twist, wet snarling number, yarn hairiness, yarn strength and other performances of the different kinds of modified yarn. The results shows if yarn count and twist factor of the two different types of yarns are the same, the compact Siro false twist spinning can produce smoothly, but the compact sirospun has higher breakkage due to its low strength. Based on normal production, compared with compact sirospun, compact Siro false twist spinning shows significantly better performances in yarn twist, wet snarling number, yarn strength, harmful yarn hairiness number above 3 mm, yarn evenness. Even when the designedtwist factor is reduced by about 16%, the spinningprocess can also work well. What's more, the number of hairiness over 3 mm is reduced by about 90%, yarn evenness CV value is reduced by about 4.3%. However, the two spinning methods do not have significant difference in thick knots, the details, and cotton knots.Therefore, the weft skew phenomenon of knitted fabric made of compact Siro false twist spinning is improved obviously.

Key words: compact Siro false twist spinning, false twist, weft oblique phenomenon, residual torque

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