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Yarn property control on a twist drafting frame1
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ABSTRACT
Twist drafting has desirable properties for small-scale production of functional yarns. In twist drafting, a yarn is directly spun out from a large mass of fibers, and the withdrawal tension in the yarn is used to maintain steady-state conditions of yarn forming and yarn evenness. This work presents a mechanical analysis of twist drafting and a related experiment. The analytical results reveal the relation between the yarn properties of linear density and twist rate and the operational parameters for spinning of withdrawal tension in the yarn being spun out and the porosity ratio in ...
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