Measurement of Crease Recovery Properties of Yarns and Fibers1,2

Abstract

At present, no simple and satisfactory method exists to measure the crease recovery properties of fibers and yarns; consequently, this paper attempts to describe a simple method for this purpose. A thin parallelized bundle of fibers or yarns is creased for five minutes under a constant weight, and the crease recovery angles are measured on a Monsanto Wrinkle Recovery Tester. There is good correspondence between the crease recovery angles of the resin finished fabrics and of the yarns extracted from these fabrics. In the case of fibers, a definite relationship has been found to exist between the bound formaldehyde expressed as a percentage and the corresponding increase in dry crease recovery or loss in tensile strength or the reduction in the work of rupture. A similar relationship also exists between the loss in tensile strength and increase in crease recovery angles. Significant differences exist between the crease recovery angles of different cottons after crosslinking.