Yarn-Strength Prediction of American Cottons

Abstract

A system of predicting skein strength in Egyptian cottons was, with minor modifications, applied for predicting skein strength of American cottons of the hirsutum type (Uplands) and of the barbadense type (Pima), using the same linear equation. The independent variable in the prediction equation is a simple function of two of the measured properties of the fibers: staple length and fiber tenacity with specified yarn number. The dependent variable is a function of the observed skein strength, the specified number, and the specified turns per meter. By means of such configuration of variables, it was possible to extend the prediction process through a wide range of fiber properties, yarn counts, and yam twists. The correlation coefficient was high (+0.97), while the average absolute deviation from regression was 31.6 N for samples of individuals and 12 N for samples of averages.