A Study of Blended Woolen S1tructures Part I: Statistics of the Ideal Random Blended Yarn

Abstract

1. A method of predicting the variability of blend proportion along the yarn has been developed. 2. A general expression for CV of per cent composition was developed and the influence of fiber weight, yarn weight, blend composition, and yarn weight irregularity were pointed out. 3. For CV of wt. per cent of the minor component in a blend, the ideal yarn shows better homogeneity with (a) finer fiber deniers, (b) higher wt. fraction of the minor component, (c) coarser yarn, and (d) better gross weight uniformity of the yarn. 4. In view of (3), caution must be exercised when comparing two blended yarns to be sure that the principal controlling factors in blend regularity are strictly comparable. 5. An objective criterion of blend randomness, the Index of Blend Irregularity, was developed. 6. An approximation of the degree of fiber clustering was derived by manipulation of the I.B.I. © 1955, Sage Publications. All rights reserved.