Yarn Tail Structure in Friction Spinning

Abstract

We have analyzed the yarn tail structure in the yarn-forming zone of a friction spinning machine by considering the shape of individual fibers in the yarn. We use photographic and fiber tracing methods to consider the shape of individual fibers in the yarn structure. In this research, we try to demonstrate that the shape of the yam tail in friction spinning can be obtained from the fiber configuration in the yarn structure. The results of our research indicate that the yarn tail in the yarn-forming zone has a complex shape. The tip of the yarn tail is thicker than in theory, not only because of the volu minous structure in this part of tail in the yarn-forming zone, but also because it may be affected by the quality of fibers feeding in to the yarn tail through the outlet of the transport channel. The experimental results of the twist imparted to the yarn tail also show that the twist in the inner and outer layers of the yarn is different and increases in the yarn center 2-2.5 times compared with twist in the yam surface.