Abstract:

To discuss the influence of the structure of compact spun yarn on the yarn quality, the tracer fibers technique is used.The sliver containing tracer fibers were made in  the carding process, and then desired yarns were spun by the following process. The fiber migration in the yarn body is observed by using video microscope. Then, comparative analysis of the structure characteristics of 4 kinds of yarn from complete condensing spinning, ring spinning, three-roller lattice apron compact spinning and four-roller lattice apron compact spinning were made. The results show that the fibers spun in the complete condensing spinning have the minimum average radial position and the biggest transfer parameter of the fiber migration. Finally, according to the data obtained from helix envelope, the characteristic coefficient of the fiber migration, the influences of different spinning yarn structure on the yarn strength and the elongation properties are analyzed.

Key words: complete condensing spinning, tracer fiber, coefficient of fiber migration, yarn strength and elongation