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Open-End Spinning and Yarn Quality.

By:H.W.Krause

  • Transferring fibres from a mechanical drafting system through an air stream will result in a near ideal fibre distribution per cross section as less as the average number of fibres in the cross section is less than three.
  • With more fibres in cross section , a tendency for tuft formation becomes apparent.
  • Transport in air, however, has a detrimental effect on the yarn configuration, since the previously well-arranged, parallel order in the sliver is entirely disturbed, which is the major cause of the inferior strength of OE yarns.
  • Open end spinning systems in which the fibres or fibre tufts are to lose their identity in relation to the previous order in the sliver can potentially produce yarn of a uniformity as good as, or better than , that of ring-spun yarns.
  • In system in which the individual components retain their position relative to the other poorer uniformity will result.
  • According to the theory, the yarn uniformity for such systems may only be improved if material of longer staple is processed or if the location of speed reduction is confined to a very definite position of the component-collection zone, or if both these conditions apply.

 



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