Thesis Details


Thesis Title: Identification of the control variables of the chilled wet-wiping process on sized warp yarn physical properties and weaving performance
Thesis Author: Marty Odum
Abstract: The primary purpose of the slashing process is to produce a warm which will withstand the forces of weaving. Therefore, slashing is a critical step in fabric formation. With the continued development of high speed weaving machines, slashing has become even more critical to overall weaving performance. Yarn physical characteristics account for the greatest percentage of weaving stops and seem to be the primary factors which limit production weaving speed increases. Although many yarn properties affect weaving performance, investigators have found approximately 30% of weaving stops are hairiness related. Fibers protruding from the periphery of the yarn increase the chance for fiber entanglement and subsequent weaving stops. It is evident that yarn hairiness is detrimental to sized yarn weaving performance. One method purported to reduce warp yarn hairiness is the use of chilled wet-wiping rolls. AS the sized warp yarn passes through the nip of the squeeze rolls, the yarn contacts the wiping rolls which wipe the hair fibers down against the periphery of the yarn. The primary objective of this thesis was the identification of the control variables of the chilled wet-siping process on the sized warp yarn physical properties and weaving performance of 100% cotton and 50/50 polyester/cotton yarn. The control variables researched were warp sheet to rod contact lengths and warp sheet to rod surface speed ratios. Based upon the research, the following general results were noted: 1. Warp sheet to rod contact length affected sized yarn physical properties in the following way: a. Hairs per meter decreased as the contact length increased. b. Higher abrasion resistance values were achieved with increased contact lengths. 2. Warp sheet to rod surface speed ratio affected sized yarn physical properties in the following way: a. Hairs per meter were reduced with lower surface speed ratios. 3. The chilled wet-wiping process had the following effects on the sized yarn weaving performance using air-jet weaving machines: a. Filling stops/CMPX were reduced by 10.77%. b. Warp stops/CMPX were not affected in this study.