Abstract
The optimization of the opening-roller speed in open-end spinning is studied for a given type of fibre, and the effect on the yarn properties of suppressing one drawframe passage is considered. The experiments carried out with acrylic fibre show the existence of an optimum zone for the speed of the opening roller and also indicate that the suppression of a drawframe passage in the normal industrial process leads to a drop in yarn quality that principally affects the regularity and influences both the tenacity and the elongation at break of the yarn to a less extent.
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