An aging-resistant polyethylene-based dyed fiber and its preparation method

By introducing styrene, perfluorobutylethylene and 4-ethyleneaniline comonomers into polyethylene fibers, and combining them with hyperbranched epoxy-modified zinc oxide and hindered amine light stabilizers, polyethylene-based dyed fibers were prepared. This solved the problems of mechanical property degradation and uneven dyeing of polyethylene fibers under light irradiation, and achieved high strength, aging resistance and high color fastness.

CN121363052BActive Publication Date: 2026-05-26BIEM L FDLKK GARMENT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BIEM L FDLKK GARMENT CO LTD
Filing Date
2025-12-11
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Polyethylene fibers are prone to main chain breakage, cross-linking and pulverization under long-term light exposure, resulting in rapid decay of mechanical properties and insufficient dyeing uniformity and color fastness. Existing improvement methods have problems such as uneven filler dispersion and easy migration of light stabilizers.

Method used

By introducing comonomers such as styrene, perfluorobutylethylene and 4-ethyleneaniline into polyethylene copolymers, aromatic rigid segments and polar active groups are constructed. Combined with hyperbranched epoxy-modified zinc oxide and hindered amine light stabilizers, a stable interfacial bonding layer is formed. Azo dyeing agents are selected to optimize the dye adsorption and dispersion properties. Polyethylene-based dyed fibers are prepared by melt spinning and hot stretching processes.

Benefits of technology

It improves the mechanical strength and antioxidant stability of the fiber, enhances dyeing uniformity and color fastness, ensures that the fiber maintains stable color coordinates under long-term ultraviolet irradiation, avoids the migration and volatilization of light stabilizers, and achieves high-efficiency aging resistance.

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Abstract

This invention discloses an aging-resistant polyethylene-based dyed fiber and its preparation method, belonging to the field of polyethylene-based fiber processing technology. It addresses the technical problem that the mechanical strength and aging resistance of existing polyethylene-based dyed fibers need further improvement. Specifically, it comprises the following components by weight: 60-70 parts polyethylene copolymer, 10-15 parts PE-g-MAH, 8-12 parts aging-resistant filler, 1-2 parts azo dyeing agent, and 3-4 parts additives. This invention prepares polyethylene-based dyed fibers by constructing a copolymer matrix containing functionally modified polyethylene, a hyperbranched epoxy-modified zinc oxide and hindered amine composite aging-resistant system, and using PE-g-MAH as a compatibilizer. This not only effectively improves the mechanical strength of the polyethylene-based dyed fibers but also enables them to maintain excellent mechanical properties and extremely low color difference under ultraviolet aging conditions, exhibiting good aging resistance.
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