Effect of pın spacer apparatus on the propertıes of knıtted fabrıcs from cotton-tencel yarns

Abstract

Yarn quality is an important factor as it directly plays an important role in fabric properties. Among many attempts for improving yarn properties in spinning technologies, pin spacer is one of the developed apparatus which can be mounted separately on the compact spinning unit used for improving the yarn properties especially in terms of yarn evenness and hairiness. Cotton-Tencel blended compact yarns are widely preferred among the textile consumers owing to high comfort feature of Tencel fibers combined with cotton fibers’ unique properties. In this study, cotton (85%) – Tencel (15%) compact yarn samples were produced as yarn groups of combed yarn and carded yarn with utilizing and without utilizing pin-spacer apparatus at a linear density of Ne 40/1. In order to analyze the effect of pin-spacer apparatus on yarn properties, unevenness, imperfections, hairiness (H) and tensile measurements were evaluated. The greige and dyed single jersey plain knitted samples produced from those yarns were also compared in terms of dimensional changes in wale and course direction (%), pilling grades, bursting strength (kPa), air permeability values (mm/s) and the fabric surface color properties. According to test results, using pin-spacer apparatus generally improved carded and combed compact yarns’ some properties as well as some knitted fabric properties made of those yarns.

Assessing the Impact of Spacer Size Variations on the Ring-Spun Yarn Quality Ranking

“…The drafting pressure could be increased using more extended spacer sizes, resulting in a firmer grip on the fibres and, https://doi.org/10.31881/TLR.2023.102 presumably, more uniform drafting [22]. On the other hand, a considerable size may overcontrol the fibres, which might end up in trouble with fibre breakdown or restrict the fibre's movement scope, which may lead to irregular yarn [26]. The following information explains the impacts of different spacer sizes and their impact on the overall performance of the produced yarn.…”

“…However, excessively controlling the fibres might cause breaks or uneven yarn [25]. Thus, the spacer size must correspond to the cotton and yarn parameters [26]. Each yarn type may have an ideal spacer size for yarn fineness.…”

“…The strength of the tensile test determines elongation as a percentage. A standard test clamps a yarn sample of known length at the beginning at both ends and applies an incrementally heavier load to assess its elongation [26,34].…”