FRICTIONAL PROPERTIES OF NYLON YARN AND THEIR RELATION TO THE FUNCTION OF TEXTILE GUIDES

This paper describes the measurement of the kinetic coefficients of friction between guides and nylon yarns in relation to the speed of the running yarn, the tensions in the yarn, the materials of the guides and the smoothness of their surfaces, the twist in the yarns, titanium dioxide content and the effects of lubricants and sizes. The results show that for high-twist multifilament yarns the smoothest guides give rise to the lowest frictional forces. For low-twist multifilament yarns and monofilaments, guides with rougher surfaces are essential if the coefficients of friction are to be kept low.