High-strength polyester yarn and preparation method thereof

By surface activation and functional monomer graft copolymerization of polyester yarn, the problem of chemical inertness limitation of polyester yarn has been solved, and high-strength, durable, multifunctional polyester yarn suitable for high-end applications has been prepared.

CN121363112AInactive Publication Date: 2026-01-20NANTONG ZHENGYU WIRE IND CO LTD
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Patent Information

Application Number
CN202511671587.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-14
Publication Date
2026-01-20
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Polyester yarn, due to the lack of active groups in its macromolecular chain, high crystallinity, and smooth surface, exhibits strong chemical inertness and hydrophobicity, which limits its functional development and makes it difficult to meet the specific surface functional characteristics required in high-end application scenarios.

Method used

The fiber surface is activated by low-temperature plasma treatment or bio-enzyme treatment, and functional monomers such as vinyl silane and fluorinated acrylate are grafted to form a copolymerization reaction. Combined with thermal network treatment, a fiber interface layer with specific functions is constructed.

Benefits of technology

It achieves the durability of high-strength polyester yarn with superhydrophobic and antibacterial properties, and has excellent toughness and comfort, making it suitable for high-end sportswear, industrial textiles and smart wearables.

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Abstract

The invention relates to the technical field of polyester yarns, in particular to a high-strength polyester yarn and a preparation method thereof.The method comprises the steps that PET slices with the intrinsic viscosity of 0.85-1.00 dL / g are subjected to melt spinning and cooled through circular blowing to obtain nascent fibers, the nascent fibers are subjected to surface activating treatment through low-temperature plasma or esterase bio-enzyme, and the high-strength polyester yarn is obtained; the preparation method comprises the following steps: firstly, activating fibers, then carrying out graft copolymerization reaction on the activated fibers and graft monomer solutions such as fluorinated acrylate and acrylic acid, and finally, cleaning, drying, carrying out thermal network and winding on the composite fibers, so that the prepared polyester yarn has the breaking strength of more than or equal to 7.7 g / D, the dry heat shrinkage rate of less than or equal to 3.5% and the shrinkage tension of less than or equal to 0.03 g / D, has the high functional characteristics of lasting super-hydrophobicity, antibacterial property and the like, is excellent in washing resistance, and is suitable for industrial production. The problem that functionalization is difficult due to surface inertia of the polyester fiber is solved, and the mechanical property and the surface characteristic of the polyester fiber are comprehensively improved.
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