Effect of Carding Rate and Cylinder Speed on Fiber Hooks and Spinning Performance for an Irrigated Acala Cotton

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Abstract
The effect of carding rate and cylinder speed on fiber hooks and spinning perform ance was investigated for an irrigated Acala 4-42 cotton. It was found that increased carding rate increased minority and decreased majority hooks. The rate at which the minority hooks increased was greater for the Acala 4-42 cotton than a Deltapine cotton previously investigated. Generally, second-drawing sliver uniformity and end breakage were not affected by increases in carding rates. High carding rates resulted in less noils being removed without detrimentally affecting fiber length, yarn properties, or end breakage. Yarn imperfections and minority hooks of card sliver were related, indicating that, possibly, the phenomenon which produces minority hooks also produces neps and, thereby, yarn imperfections. This limited study seems to demonstrate that each type of cotton has its own peculiar fiber-hook formation pattern as carding rate is increased. The practical application of the research is briefly discussed.

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