Evaluating combing roll fiber damage in rotor spinning using the Afis

William Cole, Albert Esquibel

Abstract


Questions have been raised from time to time concerning how much cleaning of the fiber and at what cost to fiber properties occurs during the opening action of the combing roll. The Uster AFl5, with the ability to measure fiber length, quantify trash and neps, et cetera, has made this studY'easy to perform provided fiber could be collected without damage after passing through the opeiling process of the combing roll. The purpose of this shldy was to quantify the influence on fiber properties and the cleaning effect of the rotor spinning combing roll as measured by the Uster AFlS machine. The objective was to test the effect of the processing rather than compare varieties. The four cotton varieties selected for this study were from excess cottons from a fo rmer project.1 These were chosen to give a range of staple lengths, micronaire, nep and trash counts, Each variety was tested from the bale on Spinlab 900B for HVI data and Uster AFIS. This article uses the averages of the four varieties to show the overall trends of the influence on fiber properties by processing. The full report is in the 1994-95 Annual Report to the Texas Food and Fibers Commission, available from the 'IIC.

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