Method for winding an elastic yarn package
AssigneeInvista North America S.A R.L.
InventorJoseph E. Koskol
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Abstract
A method is provided for winding an elastic yarn into a cylindrical substantially straight-ended yarn package. The method includes feeding an elastic or elastomeric yarn at a substantially constant speed to a tube core to form the yarn package. The yarn package is rotated such that the yarn package with a substantially constant surface speed. The yarn is wound to form layers of helical coils, while providing a helix angle variation of greater than zero up to +/−80%.
Claims16
A method for winding an elastic yarn into a cylindrical substantially straight-ended yarn package comprising:
- (a) feeding an elastic or elastomeric yarn at a substantially constant speed to a tube core to form said yarn package;
- (b) rotating the yarn package to provide the yarn package with a substantially constant surface speed;
- and
- (c) winding the yarn to form layers of helical coils, while providing a helix angle variation of greater than zero up to +/−80%.
A yarn package including layers of a helically wound spandex yarn comprising a helix angle variation of about +/−3% to about +/−50%.
Dependencies are inferred from the claim text.