FRICTION COEFFICIENT MEASUREMENT OF HYBRID YARNS FROM BAST FIBRES – APPROACH OF A NEW TEST RIG

Authors : Seyit Burhanettin Halac, Alina Richter

Pages : 237-242

Doi:10.7216/teksmuh.1560625

View : 28 | Download : 34

Publication Date : 2025-09-30

Article Type : Research Paper

Abstract :In this paper, research and studies on yarn spinning for textile fabric production have been investigated, including spinning of hybrid low-twist covered yarns made from natural and modified bast fibres. Friction values were analyzed before spinning to predict the yarn quality and processability of natural and modified bast fibres. Analyzing the friction values before spinning helps to predict the yarn quality and processability, enhancing the production efficiency. For this purpose, tribological tests were conducted on the Lünenschloss, a test rig newly developed by the ITA, including adhesion-slip tests on hemp-based slivers. This test rig uses stationary tensile force measurement to calculate the coefficient of friction of the tested fibre materials. The advantage of the Lünenschloss test rig is that it allows for testing with small quantities, providing reliable results even with minimal sample sizes, such as individual fibres or short yarn segments. Adhesion-slip tests were first carried out on various hemp-based slivers, including those containing polypropylene (PP). The results show that the sliver stability increased with the addition of PP fibres, which promises better stability in later processing steps. To confirm these results, friction coefficients were determined on the Lünenschloss test rig. These results correlated with the results of the adhesion-slip tests. Overall, these preliminary tests allow qualitative statements to be made about the reliable yarn production and resulting yarn stability. Based on these results, it can be assumed that promising yarns can be produced from modified fibres due to their properties.
Keywords : Kenevir, lif, Sürtünme Katsayısı, Iplik, Lünenschloss

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