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Twist distribution in staple fibre yarns

Version 2 2024-06-04, 11:01
Version 1 2014-10-28, 09:00
journal contribution
posted on 2010-04-01, 00:00 authored by Peter Lamb, Lijing Wang, Xungai Wang
Staple fibre yarns vary quite markedly in linear density (tex) along their length and the degree to which twist redistributes from thick to thin places will affect the strength, torque and extension behaviour of the yarn. Theory suggests that twist along worsted yarns should vary as 1/(tex)2 if fibres were locked in the structure, whereas themean torque of worsted yarns reported in the literature implies that twist should be proportional to 1/tex. This article examines twist distribution in ring-spun marl yarns, down to 5 mm resolution, as a function of linear density measured using a high-resolution capacitive sensor. It is found for moderate twist-level worsted yarns that twist is approximately proportional to 1/(tex)1.6. The results and theory provide a guide as to the effect the observed large variations in linear density will have on yarn properties such as tenacity and torque.

History

Journal

Journal of the Textile Institute

Volume

101

Issue

4

Pagination

293 - 303

Publisher

Taylor & Francis

Location

Manchester, England

ISSN

0040-5000

eISSN

1754-2340

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2009, Taylor & Francis