Abstract
This paper reports the frictional properties of a series of siro spun yarns produced from cotton, polyester/cotton, and viscose. The coefficient of friction of the yarns has been measured using Howell's method where the two yams slide against each other at right angles. Yarn-to-metal friction has also been measured using a modified version of Howell and Mazur. The dependence of strand spacing and twist on the coefficients of yarn-to-yarn and yarn-to-metal friction has been examined, and the frictional coef ficient increases with increasing strand spacing and twist. The probable reasons for this behavior are discussed in terms of the nature of the yarn surfaces.
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