Manufacture and Evaluation of Auxetic Yarns and Woven Fabrics

Yajie Gao, Sai Liu, Miaobing Wu, Xiaogang Chen, Rachel Studd

Research output: Contribution to journalArticlepeer-review


Auxetic materials are a type of novel materials exhibiting negative Poisson’s ratio with potentials for special applications. This study aims to optimise the auxetic yarn and fabric manufacturing processes, establish the understanding of the influence of yarn and fabric parameters on the auxeticity of the engineered materials and explore the potential applications of auxetic textile materials. The auxetic yarns were manufactured based on a conversional helical structure composing initially a super elastic polyurethane core and a high modulus Nylon 6,6 binder. A hollow spindle machine was used to produce the auxetic yarn with optimised twisting and delivery speeds. Stable helical yarns with auxetic properties were manufactured using the optimised parameters, and woven fabrics were produced from the selected auxetic yarns in both warp and weft directions. Experiments showed that the maximum negative Poisson’s ratio of helical auxetic yarns reached a remarkable level of ‐5.6, and the auxetic fabric displayed notable geometric changes compared with the non‐auxetic fabrics with the same structural parameters. The auxeticity demonstrated in the fabrics implies applications in areas such as filtration and impact protection.
Original languageEnglish
JournalPhysica Status Solidi (B)
Early online date9 Apr 2020
Publication statusPublished - 2020


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