Fiber friction in yarn - A fundamental property of fibers

Friction between fibers inside yams is generally important for determining the physical behavior of textiles. The tendency of cellulosic fibers to slide in a yam 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 yam as a function of yam 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, mu and alpha: mu is the coefficient of friction of fibers in a yarn and alpha describes fiber adherence. As a result of the calculations, these fibers can be characterized by their frictional properties in a yarn.