Abstract
This paper presents an analysis of the fiber dynamics in the twist draft spinning, and an application of the derived theory from the analysis to TCTDS (Tension Control type Twist Draft Spinning), a kind of the twist draft spinning that is being developed by the authors.Through the analysis, we specially have regard for linear density and twist rate of the twist draft spinning yarn those are deeply concerned with the quality and structure of the yarn. And we found that the twist multiplier of the twist draft spinning yarn spun in steady state of the spinning process is formulated by a function of properties of raw materials, e.g., fiber length, fiber diameter, and the coefficient of inter-fiber friction.The theoretical result shows good agreement with the practical data of yarn properties given by the related experiments, and it proves to be a valuable tool in designing of yarns spun with TCTDS.
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