Mechanism Analysis on Compact Yarn in Compact Spinning with Pneumatic Groove

摘要

Compact spinning technology has now been available for years and is winning market acceptance. This paper introduced the structure of the compact spinning with pneumatic groove and the formation principle and process of the compact yarn. The moment of resistance to twist and the moment of torsion are also analyzed. The condition of producing the compact yarn is determined. Results from this research confirmed that the positions of fibers at different width change as a result of airflow, and the phenomenon of migration of fibers is to take place in the section of the fiber bundle. The twist propagation can affect the compact yarn properties especially the strength and hairiness. The yarns spun on the compact spinning system are characterized by higher tenacity, higher elongation at break, smaller mass irregularity measured at short segments, and significantly lower hairiness in comparison with yarns spun on the conventional ring spinning frame.