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A method for dyeing polyimide fiber with disperse dyes

A technology of polyimide fiber and disperse dye, applied in the direction of dyeing method, textile and papermaking, etc., can solve the problems of difficulty in dyeing polyimide fiber, achieve good industrial application value, excellent fastness and simple process Effect

Inactive Publication Date: 2016-08-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it is precisely because of the above-mentioned excellent and stable properties of polyimide that it is extremely difficult to dye polyimide fibers. At present, it is still a hot spot in the research of new fiber dyeing, and it is also the bottleneck of its promotion in the industrial or civilian market.

Method used

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  • A method for dyeing polyimide fiber with disperse dyes
  • A method for dyeing polyimide fiber with disperse dyes
  • A method for dyeing polyimide fiber with disperse dyes

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Put the polyimide fiber in absolute ethanol with a bath ratio of 1:100, and treat it at 60°C for 60 minutes. After cleaning, put it into a 30g / L sodium hydroxide solution with a bath ratio of 1:100. Treat at 80°C for 10 minutes, then wash and dry.

[0026] (2) under room temperature, the polyimide fiber that step (1) obtains is put into by the disperse blue SE-2R dyestuff that is 5% by fabric weight, the sodium nitrate that concentration is 4g / L and concentration is 40g / L In the working liquid composed of benzyl alcohol, the working liquid bath ratio is 1:100, the temperature is raised to 135°C at 2°C / min, kept for 45min, then cooled to 60°C at a rate of 2°C / min, and washed with water.

[0027] In this embodiment, the blue disperse dye used, plus the yellow color of the fiber itself, does not require multiple dyes to match colors,

[0028] The direct color is green and can be used for military field protective clothing. After dyeing, the K / S value, washing fastnes...

Embodiment 2

[0034] (1) Put the polyimide fiber in absolute ethanol with a bath ratio of 1:100, and treat it at 60°C for 60 minutes. After cleaning, put it into a 20g / L sodium hydroxide solution with a bath ratio of 1:100. Treat at 80°C for 10 minutes, then wash and dry.

[0035] (2) under room temperature, the polyimide fiber that step (1) obtains is put into by the disperse red C.I.Disperse Red 227 dyestuff of 5% by fabric weight, the sodium nitrate that concentration is 4g / L and concentration is 40g / In the working liquid composed of L benzyl alcohol, the working liquid bath ratio is 1:100, the temperature is raised to 130°C at 2°C / min, kept for 30min, then cooled to 60°C at a rate of 2°C / min, and washed with water.

[0036] In this embodiment, the red disperse dye used, together with the yellow color of the fiber itself, does not require color matching of multiple dyes, and the color is directly orange-red, which can be used for fire protection clothing. After dyeing, the K / S value, w...

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Abstract

The invention relates to a method for dyeing an aromatic polyimide fiber with a disperse dye. The method comprises the following steps: putting the aromatic polyimide fiber into a solution formed by a degreaser, wherein the bath ratio is 1 to (70-120), processing at 50-70 DEG C for 50-70 minutes, cleaning and putting into 2-40g / L of alkali liquor, wherein the bath ratio is 1 to (70-120), processing at 70-90 DEG C for 5-15 minutes, washing and drying; and (2), putting the aromatic polyimide fiber obtained from the step (1) into a working liquid at a room temperature, heating to 120-150 DEG C, carrying out heat preservation for 30-60 minutes, cooling to 60 DEG C and washing. The disperse dye is hardly dissolved into water, and is difficult to fall off from the fiber after entering the fiber, so that the fastness of the dyed fiber is excellent; the aromatic polyimide fiber dyed by the method is dark in color, and high in dyeing fastness; and the method simple in process and relatively low in processing cost, and has good industrial application value.

Description

technical field [0001] The invention belongs to the field of polyimide fiber dyeing, in particular to a method for dyeing polyimide fiber with disperse dyes. Background technique [0002] Polyimide is one of the organic polymer materials with the best comprehensive performance. It refers to a class of high molecular polymers containing imide ring groups on the main chain of the molecule. The structural formula of the imide ring is as follows: [0003] [0004] There are many kinds of dibasic anhydrides and diamines as the main monomers, and different combinations can obtain polyimide materials with different properties. Therefore, polyimide materials have flexible chemical structure design and can be applied to different need. A large number of rigid imide five-membered ring structures in the main chain of polyimide molecules determine that polyimide fibers have excellent performance in many aspects; such as high thermal stability, the long-term applicable temperature ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P3/04D06P1/16
Inventor 俞丹饶竹君刘玲玲郝天琪穆世鹏展义臻王炜
Owner DONGHUA UNIV
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