Abstract
This paper presents the yarn pull-out strength and shear behaviour of Kevlar fabrics coated with natural rubber latex (NRL). Plain woven Kevlar 29 fabric was coated with NRL using several dipping techniques which were single-dip (SD), double-dip (DD) and triple-dip (TD). The yarn pull-out and shear deformation were measured and observations were made on their modes of failure. The results indicated that the NRL-coated fabric showed higher load forces in comparison with the uncoated fabric. The yarn pull-out strengths for SD-, DD- and TD-coated fabrics were 17, 25 and 35 %, respectively, higher than the uncoated fabric. Similarly, the shear behaviour of the NRL-coated fabric also showed higher shear angles in comparisons with the uncoated fabric. It can be said that the NRL restricts the yarn movement, bunches them together to resist the external work force of yarn pulling or shearing before they completely failed at certain point. The presence of NRL layer on the fabric surface helps to increase the force loads and thus increase the yarn–yarn and yarn–NRL friction.
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Acknowledgement
The authors are grateful to Revertex (Malaysia) Sdn. Bhd. for supplying the pre-vulcanized natural rubber latex. The assistance from the Research Management Institute of Universiti Teknologi MARA is also highly appreciated.
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Ahmad, N.A., Ahmad, M.R., Ahmad, W.Y.W. (2014). Yarn Pull-Out and Shear Behaviour of Kevlar 29 Fabrics Coated with Natural Rubber Latex. In: Ahmad, M., Yahya, M. (eds) Proceedings of the International Colloquium in Textile Engineering, Fashion, Apparel and Design 2014 (ICTEFAD 2014). Springer, Singapore. https://doi.org/10.1007/978-981-287-011-7_6
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DOI: https://doi.org/10.1007/978-981-287-011-7_6
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