Analysis of the Fiber Spatial Trajectory in Vortex Spun Yarn

The principle and the process of yarn formation determine fiber migration and twist radial distribution in a yarn. Usually tracer fiber technology is introduced to discuss fiber configuration in the yarn body. There are few studies on fiber spatial configuration based on the principle and the process of yarn formation. In this paper, we discuss fiber spatial trajectory in vortex spun yarn from the viewpoint of the principle and the process of yarn formation. Based on the fiber movement rule, the parameter equations of fiber spatial trajectory in vortex spun yarn were established. The fiber spatial configuration and its influenced factors were analyzed. The research results showed that the fiber spatial configuration in vortex spun yarn consisted of the core fiber and the migration wrapper fiber as well as the regular wrapper fiber. The fiber spatial configuration in vortex spun yarn was affected by the following factors: delivery speed, distance from the front roller nip point to the hollow spindle, mean angular velocity for the open-end trailing fiber, fiber length, and vortex spun yarn diameter.