Influence of Spinning Parameters on Vortex Spun Yarn Properties Essay Example

the spindle. Basal and Oxenham conducted a study in which they individually altered these parameters and observed the resulting effects on the yarn structure.

They observed that slight variations in these parameters have a substantial impact on the yarn structure. For the study, they utilized cotton fibers with an average upper half value of 1.44 and a micronaire value of 3.4. The speed at which yarn is delivered greatly influences the formation of thick areas and hairiness.

Lower delivery speeds lead to decreased thickness and hairiness. However, when the speeds are higher, there is an increase in the occurrence of thick spots. The yarn delivery speed and nozzle angle together greatly influence the level of hairiness. Additionally, the distance between the front roller and the spindle plays a crucial role as it determines the quantity of wrapping fibers. A shorter distance causes the tight assembly of both ends of fibers, leading to a reduced number of open-ended fibers. As a result, the resulting yarn mainly consists of parallel core fibers with fewer wrapper fibers similar to an air-jet yarn.

This time, the yarn evenness and imperfections are improved because there is a lower risk of losing control over the fibers during the bundling of the parallel core fibers, which make up the majority of the yarn alongside a few wrapper fibers. Additionally, the waste is reduced thanks to better fiber control, and the yarn has a lower level of hairiness. In contrast, under different conditions, there is an increase in wrapper fibers and reduced fiber control. Consequently, the resulting yarn becomes softer due to the increased presence of wrapper fibers and exhibits more hairiness with longer strands. However,

the waste fiber rate is higher when compared to the short setting.

Increasing the nozzle pressure leads to an increase in both axial and tangential velocity, resulting in an increased flow of fiber bundles.