The Structure and Properties of Vortex and Compact Spun Yarns

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dc.contributor.advisor P. Banks-Lee, Committee Member en_US
dc.contributor.advisor W. Oxenham, Committee Chair en_US
dc.contributor.advisor C. Brownie, Committee Member en_US
dc.contributor.advisor G. Hodge, Committee Member en_US Basal, Guldemet en_US 2010-04-02T18:57:49Z 2010-04-02T18:57:49Z 2003-04-21 en_US
dc.identifier.other etd-03172003-132411 en_US
dc.description.abstract Properties of spun yarns are mainly affected by fiber properties and yarn structure. Yarn structure is primarily determined by the spinning process. In fact, each spinning process tends to produce a distinctive yarn structure. Recent refinements in spinning technologies have yielded significant improvement in yarn quality; however, the mechanism for these changes is not fully understood. Vortex spinning can be viewed as a modification or refinement of jet spinning, and compact spinning is an enhancement of traditional ring spinning. The present research focuses on identifying those structural differences which can be used to explain the properties of these newer yarns. Prior to the main investigation preliminary trials were conducted to asses the differences between the properties of vortex and air-jet yarns produced from a variety of polyester/ cotton blends. Additionally a literature survey was conducted. A specially designed experimental study was carried out with the role of twist on the properties of compact spun yarn compared to conventional ring spun yarn, and the results clearly show differences in tensile and hairiness characteristics. An attempt is made to explain these differences in terms of structural parameters and in particular faster migration within the yarn. Intuitively one may expect migration to be less for compact yarns because of the more compact yarn formation zone; however, the experimental results clearly show that this is not true and an explanation for the higher migration in compact yarn is proposed. For vortex yarn a similar study is reported, however the differences found for processing conditions are very small and it is difficult to draw any definite conclusion. Possible reasons for this are given. A new approach to yarn structure analysis and quantification is also investigated and shown to offer great potential as a tool for this type of study. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject yarn structure analysis en_US
dc.subject compact spinning en_US
dc.subject vortex spinning en_US
dc.title The Structure and Properties of Vortex and Compact Spun Yarns en_US PhD en_US dissertation en_US Fiber and Polymer Science en_US

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