Yarn process

Claim 1

In a process for simultaneously drawing and texturing by false twist crimping a synthetic multifilament yarn wherein undrawn or partially drawn yarn is fed into a simultaneous drawing and false twist crimping zone comprising a heated zone and false twist spindle positioned between a yarn feed means and a yarn draw means and wherein the false twist backs upstream into the heated zone and wherein the yarn necks at a draw point between the feed means and the false twist spindle, the improvement to reduce threadline tension along the longitudinal axis of the yarn between the false twist spindle and the draw means and thereby prevent or reduce filamentation caused by too high a threadline tension between said spindle and said drawing means when said yarn would be false twist crimped at the draw ratio and false twist insertion level used to conventionally flat draw said undrawn or partially drawn yarn at its optimum draw ratio and then false twist crimp said drawn yarn, which comprises reducing the draw ratio, as determined by the peripheral speeds of the feed means and draw means, to a value allowing draw, false twist crimping production of a yarn of acceptable tenacity and dyeability, and then increasing the turns per inch of false twist inserted into said yarn to reduce said threadline tension until filamentation is reduced to an acceptable level.