Investigation of the Relation between the Tensile Properties of Cotton Fiber Bundles and Yarns in the Dry and Wet States 1

Abstract

Relationships existing between the tensile properties of cotton fiber bundles and yarns under two ambient conditions,(i) in standard atmosphere and (ii) in the wet state have been studied on 27 cottons varying widely in fiber properties. The cottons have been processed into 24s (24.6 tex) yarn with twist multipliers ranging from 3.75 to 6.0 Correlations between the elastic properties of fibers on the one hand and corresponding yarn properties on the other have been determined for different twist multipliers The combined influence of six fiber properties on yarn strength, elongation, stiffness, and toughness at twists for maximum strength and the order of importance of fiber properties have also been determined by multiple correlation analysis.

It is shown that cottons vary widely in their response to wetting, and the elastic properties of single yarns are significantly correlated with the corresponding yarn properties, the degree of association varying, however, with the twist in yarn and conditions of test. Multiple correlation coefficients in the wet state are lower than those in the dry state, indicating that wetting increases the importance of some fiber properties not included in the six investigated.