Stretch-processed yarn, fiber product, composite spinneret, and composite fiber production method

Patent metadata

Field	Value
Publication number	US-12378704-B2
Application number	US-201917291346-A
Country	US
Kind code	B2
Filing date	Nov 1, 2019
Priority date	Nov 6, 2018
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

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.

First claim

The invention claimed is:

1. 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.

2. The stretch yarn according to claim 1 , wherein the number of fibers included in the group having the minimum group average value of the coil diameter is 20% or more of the total number of fibers constituting the multifilament.

3. The stretch yarn according to claim 1 , wherein an average diameter of the fibers constituting the multifilament is 15 μm or less.

4. A fiber product comprising the stretch yarn according to claim 1 in at least a part of the fiber product.

5. 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.

6. The stretch yarn according to claim 5 , wherein fibers having different diameters are deformed in an inclined manner according to the elongation of the textured yarn.

7. The stretch yarn according to claim 5 , wherein the stretch yarn is substantially free from convergence and non-convergence portions.

Assignees

• Toray Industries

Inventors

• Matsuura Tomohiko
• Morioka Hideki
• Masuda Masato

Classifications

• D02G3/22

  Yarns or threads characterised by constructional features {, e.g. blending, filament/fibre (piecing of yarns or threads D01H15/00)} · CPC title

• D02G1/18

  by combining fibres, filaments, or yarns, having different shrinkage characteristics {(D02G1/004 takes precedence)} · CPC title

• D03D15/283

  synthetic polymer-based, e.g. polyamide or polyester fibres (cellulose-based artificial fibres D03D15/225) · CPC title

• D03D15/00

  Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used · CPC title

• D03D15/37

  with specific cross-section or surface shape · CPC title