Woven Fabrics Made of Auxetic Plied Yarns

Auxetic plied yarns are specially constructed with two types of single yarns of different sizes and moduli. This paper investigates how to use these types of yarns to produce woven fabrics with auxetic effects. Four-ply auxetic yarns were first incorporated into a series of woven fabrics with differ...

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Main Authors: Wing Sum Ng, Hong Hu
Format: Article
Language:English
Published: MDPI AG 2018-02-01
Series:Polymers
Subjects:
Online Access:http://www.mdpi.com/2073-4360/10/2/226
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spelling doaj-6f25d3c82c6b4e47ad77d7f6130676a92020-11-24T23:14:53ZengMDPI AGPolymers2073-43602018-02-0110222610.3390/polym10020226polym10020226Woven Fabrics Made of Auxetic Plied YarnsWing Sum Ng0Hong Hu1Institute of Textile and Clothing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, ChinaInstitute of Textile and Clothing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, ChinaAuxetic plied yarns are specially constructed with two types of single yarns of different sizes and moduli. This paper investigates how to use these types of yarns to produce woven fabrics with auxetic effects. Four-ply auxetic yarns were first incorporated into a series of woven fabrics with different design parameters to study their auxetic behavior and percent open area during extension. Effects of auxetic plied yarn arrangement, single component yarn properties, weft yarn type, and weave structure were then evaluated. Additional double helical yarn (DHY) and 6-ply auxetic yarn woven fabrics were also made for comparison. The results show that the alternative arrangement of S- and Z-twisted 4-ply auxetic yarns in a woven fabric can generate a higher negative Poisson’s ratio (NPR) of the fabric. While the higher single stiff yarn modulus of auxetic yarn can result in greater NPR behavior, finer soft auxetic yarn does not necessarily generate such an effect. Weft yarns with low modulus and short float over the 4-ply auxetic yarns in fabric structure are favorable for producing high NPR behavior. The weft cover factor greatly affects the variation of the percent open area of the 4-ply auxetic yarn fabrics during extension. When different kinds of helical auxetic yarns (HAYs) are made into fabrics, the fabric made of DHY does not have the highest NPR effect but it has the highest percent open area, which increases with increasing tensile strain.http://www.mdpi.com/2073-4360/10/2/226auxetic yarnsnegative Poisson’s ratioauxetic textileswoven fabric
collection DOAJ
language English
format Article
sources DOAJ
author Wing Sum Ng
Hong Hu
spellingShingle Wing Sum Ng
Hong Hu
Woven Fabrics Made of Auxetic Plied Yarns
Polymers
auxetic yarns
negative Poisson’s ratio
auxetic textiles
woven fabric
author_facet Wing Sum Ng
Hong Hu
author_sort Wing Sum Ng
title Woven Fabrics Made of Auxetic Plied Yarns
title_short Woven Fabrics Made of Auxetic Plied Yarns
title_full Woven Fabrics Made of Auxetic Plied Yarns
title_fullStr Woven Fabrics Made of Auxetic Plied Yarns
title_full_unstemmed Woven Fabrics Made of Auxetic Plied Yarns
title_sort woven fabrics made of auxetic plied yarns
publisher MDPI AG
series Polymers
issn 2073-4360
publishDate 2018-02-01
description Auxetic plied yarns are specially constructed with two types of single yarns of different sizes and moduli. This paper investigates how to use these types of yarns to produce woven fabrics with auxetic effects. Four-ply auxetic yarns were first incorporated into a series of woven fabrics with different design parameters to study their auxetic behavior and percent open area during extension. Effects of auxetic plied yarn arrangement, single component yarn properties, weft yarn type, and weave structure were then evaluated. Additional double helical yarn (DHY) and 6-ply auxetic yarn woven fabrics were also made for comparison. The results show that the alternative arrangement of S- and Z-twisted 4-ply auxetic yarns in a woven fabric can generate a higher negative Poisson’s ratio (NPR) of the fabric. While the higher single stiff yarn modulus of auxetic yarn can result in greater NPR behavior, finer soft auxetic yarn does not necessarily generate such an effect. Weft yarns with low modulus and short float over the 4-ply auxetic yarns in fabric structure are favorable for producing high NPR behavior. The weft cover factor greatly affects the variation of the percent open area of the 4-ply auxetic yarn fabrics during extension. When different kinds of helical auxetic yarns (HAYs) are made into fabrics, the fabric made of DHY does not have the highest NPR effect but it has the highest percent open area, which increases with increasing tensile strain.
topic auxetic yarns
negative Poisson’s ratio
auxetic textiles
woven fabric
url http://www.mdpi.com/2073-4360/10/2/226
work_keys_str_mv AT wingsumng wovenfabricsmadeofauxeticpliedyarns
AT honghu wovenfabricsmadeofauxeticpliedyarns
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