Dyeing method for improving dyeing performance of polyimide fibers

A polyimide fiber, dyeing performance technology, applied in the direction of dyeing, textiles and papermaking, etc., can solve the problems of low dyeing rate, low color fastness, etc., to achieve simple operation, low requirements for equipment and steps, and good protection Effect

Pending Publication Date: 2021-09-28
绍兴市柯桥区东纺纺织产业创新研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical problem to be solved is to provide an excellent polyimide fiber pretreatment process and dyeing process to ove

Method used

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  • Dyeing method for improving dyeing performance of polyimide fibers

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Effect test

Embodiment 1

[0027] A dyeing method for improving the dyeing performance of polyimide fibers. The specific steps are: before the polyimide fibers are dyed with cationic dyes, the polyimide fibers are immersed in an alkaline solution at a bath ratio of 15:1. Heat the dyeing solution to 80°C, keep the solution for 70 minutes, then cool the dyeing solution to room temperature, take out the fiber and rinse it in a 0.3mol / L weak acidic solution, then wash it with deionized water, and then dry it to obtain lye pretreatment The finished polyimide fiber; the pretreated fiber, according to the bath ratio of 15:1, immerse the chemically pretreated polyimide fiber in the dyeing solution, heat the dyeing solution to 70 ° C, and keep the solution for 70 minutes, and then Let the dyeing solution cool down to room temperature, take out the fibers, and then wash them with water, soap them, wash them with water, and dry them in order to obtain the dyed polyimide fibers; immerse the above-mentioned dyed poly...

Embodiment 2

[0029]Before the polyimide fiber is dyed with cationic dyes, immerse the polyimide fiber in the alkaline solution according to the bath ratio of 10:1, heat the dyeing solution to 60°C, keep the solution for 30 minutes, and then cool the dyeing solution to At room temperature, after taking out the fiber, rinse it with 0.1mol / L weak acidic solution, then wash it with deionized water, and then dry it to obtain the polyimide fiber after pretreatment with alkali solution; : 1. Immerse the chemically pretreated polyimide fibers in the dyeing solution, heat the dyeing solution to 60°C, and keep the solution for 40 minutes, then cool the dyeing solution to room temperature, take out the fibers and wash them with water and soap in turn. Washing, washing, and drying to obtain dyed polyimide fibers; immerse the above-mentioned dyed polyimide fibers in a preheated color-fixing solution for color-fixing treatment, and the color-fixing solution contains 50% (o.w.f) Color agent, color fixing...

Embodiment 3

[0031] Before the polyimide fiber is dyed with cationic dyes, the polyimide fiber is immersed in the alkaline solution according to the bath ratio of 12:1, the dyeing solution is heated to 70°C, and the solution is kept for 40 minutes, and then the temperature of the dyeing solution is cooled to At room temperature, take out the fiber and rinse it with 0.2mol / L weak acidic solution, then wash it with deionized water, and then dry it to obtain the polyimide fiber pretreated by alkali solution; : 1. Immerse the chemically pretreated polyimide fibers in the dyeing solution, heat the dyeing solution to 80°C, and keep the solution for 50 minutes, then cool the dyeing solution to room temperature, take out the fibers and wash them with water and soap in turn. Washing, washing with water, and drying to obtain dyed polyimide fibers; immersing the above-mentioned dyed polyimide fibers in a preheated color-fixing solution for color-fixing treatment, the color-fixing solution contains 60%...

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Abstract

The invention discloses a dyeing method for improving the dyeing performance of polyimide fibers. The method comprises the steps of pretreatment liquid preparation, fiber pretreatment, fiber dyeing and fiber color fixation. According to the dyeing method provided by the invention, the dyeing performance of the polyimide fibers can be effectively improved, the fiber dye uptake, the fixation rate and the K/S value of the fabric are remarkably improved, and the wet color fastness and the rubbing color fastness of the fabric are improved. The process disclosed by the invention is simple in steps, high in dyeing efficiency, capable of remarkably reducing the use amount of cationic dyes and reducing environmental pollution, green and friendly; the adopted chemical pretreatment process is simple and efficient, and the dyeing performance of the polyimide fibers can be remarkably improved; and the cationic dyes are bright in color and not prone to fading, and the efficient and lasting dyeing effect can be achieved. According to the dyeing method for improving the dyeing performance of the polyimide fibers provided by the invention, on the basis that simple and efficient chemical pretreatment is carried out on the polyimide fibers, the dyeing performance of the polyimide fibers is enhanced, the dyeing efficiency of the dyeing process is further improved, the influence on the mechanical performance of the fibers is small, the environmental friendliness is improved, and wide application of the polyimide fibers and fabrics in the field of clothing can be promoted.

Description

technical field [0001] The invention belongs to the field of dyeing technology of polyimide fibers, in particular to a dyeing method for enhancing the dyeing performance of polyimide fibers. Background technique [0002] As a special engineering material, polyimide has been widely used in aviation, aerospace, microelectronics, nanometer, liquid crystal, separation membrane, laser and other fields. Recently, countries are listing the research, development and utilization of polyimide as one of the most promising engineering plastics in the 21st century. Polyimide, because of its outstanding characteristics in performance and synthesis, whether it is used as a structural material or as a functional material, its huge application prospects have been fully recognized, and it is known as a "problem-solving expert" ( protion solver), and believes that "without polyimide, there would be no microelectronics technology today". [0003] Polyimide fiber (PI) is a high-performance fib...

Claims

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Application Information

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IPC IPC(8): D06P1/41D06P1/613D06P1/62D06P1/66D06P1/673D06P3/02D06P5/04D06P5/08
CPCD06P1/41D06P3/022D06P1/6735D06P5/08D06P5/04D06P1/623D06P1/6133D06P1/66
Inventor 惠林涛张丽娜金夏伟邵礼滨张鲁燕张云兵
Owner 绍兴市柯桥区东纺纺织产业创新研究院
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