Abstract
In a previous article in this series it was shown that the ability of a fabric to resist creasing is a function of the fiber- to-fiber coefficient of friction, the fiber modulus, and the settability.
The object of the work described in the present article was to obtain quantitative data on the setting behavior of various fibers. An apparatus for the measurement of settability is described. Some of the limits on experimental conditions are derived. Measurements on several types of yarn indicated considerable differences with respect to settability and to retention of set as a function of time. The performance of polyester yarn in both respects was found to be markedly superior, partly explaining the good crease resistance of polyester fabrics.