Process for the production of uniform yarns via reduced tension-

Details Process for the production of uniform yarns via reduced tension- Process for the production of uniform yarns via reduced tension-

1990-12-18

1992-08-11

Schroeder, Werner H.

Textiles: manufacturing

Thread finishing

Surface modification of running length

28244, 242 4709, D02J 122

Patent

active

051367637

ABSTRACT:
In processes of the production of thermoplastic polymer yarns, a process for controlling slippage of yarn on rolls across which there is a tension change. The yarn is advanced along pairs of rolls with the yarn contacting the rolls in successive wraps. At least one of the rolls is driven and has a changing diameter as the yarn advances between at least two of the successive wraps. The wraps contact the contact areas on the surface of the driven roll to each define a total wrap angle for the wrap. The number of wraps is selected and the diameter of the driven roll at the contact areas is selected to increase or decrease the tension while preventing a wrap angle in creep for any one of the wraps from being greater than about 90% of the total wrap angle for the wrap.

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