Using samples from 96 bales of Texas High Plains cotton, multiple regression techniques were used to select the "best" functional expression for the impacts of High-Volume-Instrument-measured fiber properties on the strength of open-end spun yarns. Results indicate that the most important fiber properties are strength, fineness, and length uniformity. Impacts of fiber properties are typically nonlinear. The micronaire value is inversely related to yarn strength and is best expressed as a cubic polynomial.. ABSTRACTThe development of the Cottonmaster™ fiber cleaner, its construction, strengths, and limitations are discussed. Data from several studies are used to compare the Cottonmaster's performance with regular cleaning machinery on several kinds of cotton fibers, yarns, and fabrics.

Effects of fiber properties (length, length uniformity, strength, micronaire, white, yellow, and trash content) on U.S. mill prices of cotton were estimated. USDA data on fiber properties and mill prices on cottons from four production regions in the U.S. were used in the statistical analysis. All fiber properties were found to significantly affect mill prices; the fiber properties having the greatest influence were fiber strength, length, and micronaire, followed by length uniformity, yellowness, whiteness, and trash content. These properties explained 18% of the total variation in mill prices between 1977/78 and 1983/84.

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