Abstract:

During the course of texturing, the entropy of the textured yarn increases. The entropy changing during texturing is a state function for which the entropy changing of the textured yarn varies directly to the logarithm of the disordered degree of the yarn, hence the entropy changing during texturing influences the evenness of the yarn significantly. The appearance and properties of the textured yarn keeps changing along with the developing of its entropy changing and disorderness degree, and its apparent CV value increases rapidly to the level of normal spun yarn and resultes in a perfect spun yarn-like effect. All of these situation can be further expressed by the total frequency of apparent diameter change and frequency distribution of the filament textured yarn. Owing to the bulky structure, the variation of the apparent evenness value makes it out of proportion to the mass evenness value, which is a primary difference between the textured yarn and spun yarn.