Fine yarns of low hairiness are sought after in the staple yarn industry, but production of such yarns is not easily achievable on the conventional spinning systems. The latest machinery development in producing low hairiness yarns is focused on the compact spinning systems, which involve considerable capital investment. This paper reports a novel post-spinning yarn modification technique, which has the potential of engineering very fine yarns of low hairiness. A modified winding machine, incorporating a drafting-against-untwisting unit, is used in this study to modify rotor spun yarns. Previous work leading to this development has been briefly discussed also. The results indicate that a much finer and less hairy yarn can be obtained after modifying the parent yarn, and the technique works on yarns of a range of yarn counts. Different yarn properties are also examined to highlight the potential of this novel technique.
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