Abstract
In order to add higher value to spun yarns, we have studied the application of a twist draft spinning to multi -kind small-lot production of functional yams. In twist draft spinning, a yarn is spun out directly from a large mass of material fiber and the yam count is controlled by spun yam tension. In this paper, we specially have regard to the linear de n-sity and twist rate of the yarn those are deeply concerned with quality of the yam. Through an analysis of the yam properties, it is found that the density of material fiber mass is the most effective parameter in properties of material fiber to adjust twist factor of the yarn. Furthermore, the linear density and the twist factor of the yam can be controlled independently by using spun yam tension and density of material fiber mass as adjusting parameters.
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