A study of peeling-off tension in rotor spinning and its dependence on rotor and fibre variables, Part II: validation

By a series of experiments, the theory of the generation of yarn tension at the peeling-off point (T-0) during rotor spinning as postulated in Part I of the paper has been validated. Under the similar spinning conditions, if the mechanical tension (T-r) is kept constant, then the factors like fibre length, type, linear density, cross-sectional shape and its state of openness can be manipulated so as to increase T-0 and consequently, the yarn compactness. If a fibre has a lower rigidity in torsion, it will require less torque for twisting, leaving more torque available in the PTE, causing it to lengthen and resulting in the manifestation of higher tension at the peeling-off point.