High-fastness easy-to-dye fiber, fabric preparation method and waterless dyeing process thereof

By surface modification of nano-titanium dioxide and coordination with silver ions to form an antibacterial agent, which is then mixed with polyamide chips and melt-spun with polyester chips, combined with supercritical carbon dioxide anhydrous dyeing technology, the problems of poor moisture absorption and insufficient color fastness in the dyeing process of polyester fibers are solved, achieving a highly efficient and environmentally friendly dyeing effect.

CN121046986APending Publication Date: 2025-12-02江苏苏美达纺织有限公司
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Patent Information

Application Number
CN202511192422.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2025-12-02

AI Technical Summary

Technical Problem

Existing polyester fibers have drawbacks such as poor moisture absorption and poor hand feel during the dyeing process. Traditional water bath dyeing process is water-intensive, energy-intensive, and not environmentally friendly, and has insufficient dyeing uniformity and color fastness.

Method used

The supercritical carbon dioxide anhydrous dyeing process is adopted. Carboxyl functional groups are introduced by surface modification of nano-titanium dioxide and coordinated with silver ions to form an antibacterial agent. After being mixed with polyamide chips, it is melt-spun with polyester chips to produce high-fastness and easy-dyeing fibers. Supercritical carbon dioxide fluid is used for cleaning and dyeing.

Benefits of technology

It improves the antibacterial properties and dyeing uniformity of fibers, enhances the water absorption and light fastness of fibers, has a fast dyeing speed, high color fastness, and good environmental performance, avoiding the pollution problems of traditional dyeing processes.

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Abstract

The invention relates to the field of synthetic fibers, and discloses a high-fastness easy-to-dye fiber, a fabric preparation method and a waterless dyeing process thereof. The preparation method of the high-fastness easy-to-dye fiber comprises the following steps: introducing modified polyamide chips containing the antibacterial agent into polyester chips, and carrying out melt spinning to obtain the high-fastness easy-to-dye fiber. The fiber is good in mechanical property and good in antibacterial property, the fabric made of the fiber is high in color fastness after being dyed by adopting a supercritical carbon dioxide waterless dyeing process, meanwhile, due to the supercritical carbon dioxide waterless dyeing process, dye aggregation caused by a water medium in a traditional water bath dyeing process is avoided, and the dyeing uniformity is improved.
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Citation Information

Patent Citations

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  • Production process of high-elasticity heat-resistant polyester yarn

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