Polytrimethylene terephthalate fiber, method for producing same, air-blended yarn comprising same, and fabric comprising same
By controlling the boiling water shrinkage rate and elongation rate of 20% of the elastic modulus of polypropylene terephthalate fiber, and combining air-blended fiber technology and irregular cross-section fibers, a fabric with low shrinkage and high softness was manufactured. This solved the problems of insufficient fiber softness and high heat shrinkage rate in the existing technology, and achieved stable production and soft drape.
CN121002238APending Publication Date: 2025-11-21TEIJIN FRONTIER CO LTD
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Patent Information
- Application Number
- CN202480025004.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-04-11
- Filing Date
- 2024-04-02
- Publication Date
- 2025-11-21
AI Technical Summary
Technical Problem
Existing poly(propylene terephthalate) fibers, when made into fabrics, lack sufficient softness and have a high heat shrinkage rate, leading to fabric hardening or difficulty in stable production.
Method used
By controlling the boiling water shrinkage and elongation of poly(propylene terephthalate) fibers within a specific range, and combining air-blended fiber technology with profiled cross-section fibers and core-sheath structures, the thermal stress and shrinkage of the fibers are controlled to manufacture fabrics with low shrinkage and high softness.
Benefits of technology
It achieves low shrinkage and soft texture in fabrics, solving the problems of insufficient fiber softness and high heat shrinkage in existing technologies, and improving fiber stability and soft drape.
✦ Generated by Eureka AI based on patent content.
Abstract
The purpose of the present invention is to provide: a low-shrinkage fiber; a method for producing the low-shrinkage fiber; an air-blended yarn comprising the polytrimethylene terephthalate fiber; and a fabric comprising the air-blended yarn. The low-shrinkage fiber is substantially composed of polytrimethylene terephthalate, and can be used to produce a precursor for a fabric, which has a soft texture and a low shrinkage rate due to heat. The present invention is characterized in that 90 mol% or more of polytrimethylene terephthalate fibers are composed of trimethylene terephthalate repeating units, the boiling water shrinkage of the polytrimethylene terephthalate fibers is 5% or less, and the elastic modulus of the polytrimethylene terephthalate fibers at an elongation of 20% is 5 cN / dtex or less.
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