Thesis Details


Thesis Title: The effects of singeing warp yarns on air jet weaving performance
Thesis Author: Stephen Maggard
Abstract: Excessive yarn hairiness is one of the primary causes of shed trap formation in weaving. Studies have found approximately 30% of weaving stops are related to excessive yarn hairiness. Yarn hairiness can cause several problems for a weaving operation including reduced weaving efficiency, reduced quality, and increased cost. The singeing process removes yarn hairs protruding from the yarn body.using either a flame or heated gas. The purpose of this study was to determine if singeing warp yarns at slashing would have a positive effect on air jet weaving performance. This research proves singeing can be used to reduce yarn hairiness without causing deterioration in other yarn properties such as single-end strength, strength variability, single-end elongation, elongation variability, and abrasion resistance. When combined with slashing, the hairiness reduction of 83% is a substantial improvement over the hairiness reduction possible by slashing alone. Singeing at slashing may improve weaving performance without adding an additional process. The singeing process is performed during slashing, which is a necessary step to prepare yarn for weaving. It is also a relatively inexpensive method for dealing with hairiness, since several thousand ends can be singed simultaneously. Because loom stops result in decreased efficiency and increased fabric defects, any method that can eliminate excessive hairiness, and therefore loom stops, will be of interest to the textile industry. Any method that prevents loom stops and increases weaving efficiency will save fabric manufacturers money and increase profits.