Stretch-processed yarn, fiber product, composite spinneret, and composite fiber production method
AssigneeToray Industries, Inc.
InventorsTomohiko Matsuura, Hideki Morioka, Masato Masuda
Life of this patent
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Abstract
A stretch yarn includes a multifilament including fibers having a coiled crimping form in a fiber axial direction, wherein a coil diameter distribution of crimping in the fiber has two or more groups, a ratio of a maximum group average value to a minimum group average value of the coil diameter (a maximum group average value/a minimum group average value) is less than 3.00, and a cross section of the fibers constituting the multifilament is an eccentric core-sheath cross section.
Claims7
A stretch yarn comprising a multifilament including fibers having a coiled crimping form in a fiber axial direction, wherein a coil diameter distribution of crimping in the yarn has two or more groups, a ratio of large coil diameter fibers having a maximum group average value to small coil diameter fibers having a minimum group average value of the coil diameter (a maximum group average value/a minimum group average value) is 1.50 or more and less than 3.00, wherein large coil diameter fibers and small coil diameter fibers are at least partially entangled with each other;
- an Uster unevenness U %, which is an index of unevenness in the fiber longitudinal direction, is 1.5% or less, and a cross section of the fibers constituting the multifilament is an eccentric core-sheath cross section;
- Wherein the fibers having a large coil diameter are partially deformed to follow the elongation deformation of the fibers having a small coil diameter,
- wherein the extension energy is 1.5 μJ/dtex or more.
A stretch yarn comprising:
- a multifilament including two or more groups of fibers, each having a coiled crimping form in an axial direction, wherein
- a first group of the two or more groups of fibers comprises large coil diameter fibers having a coil diameter having a maximum group average value
- a second group of two or more groups of fibers comprises small coil diameter fiber having a coil diameter having a minimum group average value
- and wherein a coil diameter distribution of crimping in the fiber has a ratio of a maximum group average value to a minimum group average value of the coil diameter (a maximum group average value/a minimum group average value) is 1.50 or more and less than 3.00
- wherein the large coil diameter fibers and the small coil diameter fibers are at least partially entangled with each other;
- wherein the stretch yarn has an Uster unevenness U % is 1.5% or less, and a cross section of the fiber constituting the multifilament is an eccentric core-sheath cross section;
- wherein the fibers having a large coil diameter are partially deformed to follow the elongation deformation of the fibers having a small coil diameter
- wherein the extension energy is 1.5 μJ/dtex or more.
Dependencies are inferred from the claim text.