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Direct dye dyeing method of polyacrylonitrile fibers

A technology of polyacrylonitrile fiber and dyeing method, which is applied in the field of fiber dyeing to achieve the effects of complete color spectrum, excellent washing and wet treatment fastness, and high dyeing rate

Inactive Publication Date: 2016-03-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many kinds of direct dyes, complete chromatograms, no need to use leveling agent, simple dyeing technology, and the color style of dyed products is quite different from cationic dyes. At present, there are no relevant research reports on the direct dyeing technology of polyacrylonitrile fibers at home and abroad.

Method used

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  • Direct dye dyeing method of polyacrylonitrile fibers
  • Direct dye dyeing method of polyacrylonitrile fibers
  • Direct dye dyeing method of polyacrylonitrile fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Pretreatment of polyacrylonitrile fiber wool: under 50°C and stirring conditions, first use an anionic surfactant aqueous solution with a concentration of 2.0g / L to wash and treat polyacrylonitrile fiber wool for 30 minutes, then take it out, wash and dry it;

[0019] 2. The surface modification of polyacrylonitrile fiber wool: accurately weigh the described pretreated polyacrylonitrile fiber wool of specified weight, immerse in the hydroxylamine hydrochloride aqueous solution that concentration is 0.40mol / L, wherein polyacrylonitrile fiber wool weight ( gram) and the volume (milliliter) ratio of hydroxyammonium hydrochloride aqueous solution is 1: 50, then use sodium hydroxide to adjust the pH value of mixture aqueous solution to 5.5-6.0, carry out amido fat modification reaction at 70 ℃ and stirring condition After 2.5 hours, after the reaction, the modified polyacrylonitrile fiber wool was taken out, washed with distilled water for 5 times, dried for later use, and...

Embodiment 2

[0023] 1. The process is the same as Step 1 in Example 1.

[0024] 2. The concentration of hydroxylamine hydrochloride was set at 0.60mol / L, and the amido fat modification reaction was 2.0 hours, and all the other processes were identical with step 2 in embodiment 1.

[0025] 3. The dye solution dyestuff is direct red GB, and all the other are the same as step 3 in embodiment 1.

[0026] 4. The process is the same as step 4 in Example 1, and the obtained polyacrylonitrile fiber yarn dyed sample is abbreviated as sample 2#.

Embodiment 3

[0028] 1. The process is the same as Step 1 in Example 1.

[0029]2. The concentration of hydroxylamine hydrochloride was set at 0.80mol / L, and the amido fat modification reaction was 1.5 hours, and all the other processes were identical with step 2 in embodiment 1.

[0030] 3. The dye solution dye is direct sunfast black G, and the rest are the same as step 3 in Example 1.

[0031] 4. The process is the same as step 4 in Example 1, and the obtained polyacrylonitrile fiber yarn dyed sample is abbreviated as sample 3#.

[0032] In order to investigate the direct dyeing fastness of polyacrylonitrile fiber wool, choose polyacrylonitrile fiber wool dyeing samples in three kinds of embodiments, with reference to national standard GB / T3921.1-5-1997 "textiles-color fastness test-washing resistance Color fastness ", using the soaping fastness tester to measure and grade the fading fastness and staining fastness of the dyed samples, the results are shown in Table 1.

[0033] Table 1 ...

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Abstract

The invention relates to a direct dye dyeing method of polyacrylonitrile fibers. The method is characterized in that the dyeing method is mainly composed of four steps that firstly, the polyacrylonitrile fibers are modified through hydroxylamine hydrochloride, and the modified polyacrylonitrile fibers are dyed though direct dye. A hydroxylamine hydrochloride aqueous solution is 0.10-0.80 mol / L, pH is 5.0-6.0, and the direct dye can be direct yellow R, direct red GB, direct fast black G or other textile dye. The dyeing method is used for dyeing treatment of polyacrylonitrile fibers. The polyacrylonitrile fibers can be bright in color. The dyeing method is used for dyeing of the polyacrylonitrile fibers. The finished products are bright and uniform in color, complete in chromatography, good in firmness degree, simple in technology and favorable for industrial popularization. Meanwhile, the polyacrylonitrile fibers can be yarn, wool, woven fabric, knitted fabric and non-woven fabric.

Description

technical field [0001] The invention relates to a fiber dyeing method, in particular to a direct dyeing method for polyacrylonitrile fibers. Background technique [0002] Polyacrylonitrile (PAN) fiber is one of the three major synthetic fibers in the world. It has good elasticity, bulkiness, light resistance and weather resistance, and is easy to wash, with good tensile strength and fastness. On the other hand, its warmth retention property is comparable to that of wool, and it can be widely used to replace wool to make bulky wool, acrylic blankets and acrylic carpets, etc., so it is called "synthetic wool". Therefore, since the industrialized production of polyacrylonitrile fiber in the 1950s, it has been widely used in the textile and garment industry, and has become an indispensable part of synthetic fibers, and it is also used in military industry, medical and health Applications are also expanding. At present, due to the limitation of technology, almost all the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/70D06P1/00D06M13/368D06L1/12D06M101/28
Inventor 董永春李冰王鹏
Owner TIANJIN POLYTECHNIC UNIV
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