Polyester fiber and tricot warp knit

By employing a polyester fiber profile design with controlled irregularity and unevenness in Trico warp-knitted fabrics, the problems of longitudinal stripes and insufficient stretchability are solved, resulting in high-quality Trico warp-knitted fabrics with excellent abrasion resistance and softness.

CN120677278BActive Publication Date: 2026-06-16TORAY INDUSTRIES INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TORAY INDUSTRIES INC
Filing Date
2024-03-18
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

In the prior art, Trico warp-knitted fabrics have problems with deterioration of longitudinal stripe quality and insufficient tensile strength when using polyester fibers, especially when using eccentric core-sheath type composite fibers, the curling torque causes the coils to be aligned, affecting the abrasion resistance and softness of the fabric.

⚗Method used

Polyester fibers with inconsistent shrinkage phases after heat treatment in an eccentric core-sheath profile are used. The profile (Y/X) is 1.1 to 3.0, the ratio of the minor diameter X to the core circumference L is 2.6 to 5.0, the core interface roughness is less than 15%, and the minimum sheath thickness S/X is 0.01 to 0.1. Specific polyester components such as propylene terephthalate and polyethylene terephthalate are used to form stable composite profile fibers.

🎯Benefits of technology

It achieves high quality, no longitudinal stripes, excellent abrasion resistance and tensile strength in Trico warp-knitted fabrics, and improves the physical properties of the fabric by controlling the fiber profile shape and composition combination.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a polyester fiber and a tricot warp-knitted fabric, which can achieve a tricot warp-knitted fabric that is excellent in wear resistance and stretchability and in which longitudinal streaks are suppressed when the tricot warp-knitted fabric is produced, by dispersing crimp of the single yarn by crimp phase inconsistency. The present invention is a polyester fiber in which, in a fiber cross section of an eccentric core sheath profile polyester fiber, the profile is an irregular profile in which an aspect ratio (Y / X) calculated from a major axis Y and a minor axis X orthogonal to Y and passing through a center of gravity of the fiber is 1.2 to 3.0, a ratio L / X of the minor axis X to a circumference L of a core portion is 2.6 to 5.0, and a degree of irregularity on an interface of the core portion is 15% or less. The degree of irregularity on the interface: when a straight line passing through a most convex point of a core portion profile parallel to the minor axis X and passing through a side of the sheath portion at which the thickness is the greatest is set as W and a distance between the line X and the line W is set as Z, the value is represented by the following formula. Degree of irregularity = Z / X x 100.
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