Effects of air-texturing process on texturing entropy change

The phenomenon of entropy change is found during texturing,especially in the course of air-jet texturing of chemical filaments.Research indicates that the texturing entropy change is well correlated with the main parameters of structure and property of the textured yarn.To find out the effects of parameters of texturing on the entropy change,a group of single factor experiments focusing on representative air-jet texturing and differential shrinking parameters,including monofilament and filament size,overfeeding rate in air-texturing,and differential shrinkage rate of the differential shrinkage filaments,were designed.The test results showed that,if the linear density of monofilament is fixed,the entropy change increases with the increase of the linear density of filaments;on the contrary,if the linear density of filaments remains constant,the entropy change declines with the increase of filament linear density;the entropy change increases as the overfeed rate increases during air texturing,and increasing the differential shrinkage rate increases the entropy change during processing differential shrinkage textured filaments.