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Fiber Friction in Yarn—A Fundamental Property of Fibers

Friction between fibers inside yarns is generally important for determining the physical behavior of textiles. The tendency of cellulosic fibers to slide in a yarn directly influences the extent of fuzz formation during abrasive treatment. This paper presents a test method to determine the slipping behavior of fibers in a yarn as a function of yarn twist. Different kinds of cellulosic fibers tested with the method include lyocell, modal, viscose, and cotton. To obtain a quantitative measure, a mathematical model is established to estimate the force for fibers slipping in a yam as a function of two basic fiber parameters. μ and α: μ is the coefficient of friction of fibers in a yam and α describes fiber adherence. As a result of the calculations, these fibers can be characterized by their frictional properties in a yarn.