Patent ID: 6086004
Filing Date: 2000-07-11
Classification: B65H

Abstract:
A process for making a spandex supply package comprising the steps of:dry-spinning spandex in a shaft;moving the spandex fiber from an exit of the dry-spinning shaft by at least one feed roll; andwinding the spandex onto a cylindrical core at variable winding speeds (S.sub.x) to form a spandex supply package comprising a plurality of pre-selected segments x along the length of the fiber, wherein the winding speed S.sub.x for each segment is predetermined from the equationS.sub.x =S.sub.o .times.(100-%R.sub.y)/(100-%R.sub.x)whereinS.sub.o is a constant winding speed at which a reference spandex supply package was wound,%R.sub.y is the package relaxation value of each pre-selected segment y along the length of the fiber in the reference package corresponding in location along the length of the fiber to the pre-selected segments x in the spandex package formed in this step, and%R.sub.x is the intended package relaxation value of each segment x in the spandex package formed above; andwherein the spinning conditions for the spandex and the dimensions and weight of the spandex package are substantially the same as those of the reference package.