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Waterless dyeing of natural fiber (cotton) and polylactic acid fiber

A polylactic acid fiber, anhydrous dyeing technology, applied in dyeing, textiles and papermaking, etc., can solve the problems of dyeing, no drying of textiles, difficult dyeing of polylactic acid fibers, etc.

Inactive Publication Date: 2005-08-10
尹恩华 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The whole process does not use water at all, so there is no problem of wastewater treatment
[0004] (2) Energy saving: Because no water is used, there is no drying process for textiles after dyeing
Polylactic acid fiber is a biodegradable fiber with high tensile strength, but it cannot be dyed at high temperature, and the anhydrous dyeing method provides the dyeing problem of polylactic acid fiber

Method used

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  • Waterless dyeing of natural fiber (cotton) and polylactic acid fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After washing the strips of cotton cloth (6 cm × 30 cm) with water, put them into 20% sodium hydroxide solution, stir continuously for 30 minutes to make the cotton cloth strips fully wet, take them out from the sodium hydroxide solution, and put them in 99% benzene formyl chloride for about 2 minutes. After taking it out, wash it with 5% sodium hydroxide and water, and put the treated cotton strip into a 1 liter supercritical dyeing tank. Turn on the power to heat the dye tank and dyeing tank at 60°C and 130°C respectively. In order to improve the color fastness of the dyed fabric, the temperature of the dyeing tank should be controlled at 1-5°C / min. 30Mpa. Keep it for 1-2 hours, slowly discharge carbon dioxide to atmospheric pressure, open the dyeing tank, take out the cotton cloth strip, and the color fastness test is 4-5 value.

Embodiment 2

[0018] The polylactic acid fiber provided by Beijing Institute of Fashion Technology was directly put into a 1-liter supercritical dyeing tank. Turn on the power and heat the dye tank and dyeing tank at 60°C and 80°C respectively. In order to improve the color fastness of the dye to cotton, the temperature of the dyeing tank should be controlled at 1-5°C / min, and the carbon dioxide should be pressed to 100°C with a membrane press. 18Mpa. Keep it for 1-2 hours, slowly discharge carbon dioxide to atmospheric pressure, open the dyeing tank, take out the cotton cloth strip, and the color fastness test is 4-5 value.

[0019] Below in conjunction with accompanying drawing, be used for implementing the supercritical dyeing device of the present invention to be described in detail, this device comprises carbon dioxide cylinder 1, membrane press 2, dye tank 3, dyeing tank 4, dye recovery tank 5, carbon dioxide storage tank 6, refrigerator 7. Also includes valve V 1 , V 2 , V 3 , V ...

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Abstract

The present invention relate sto a waterless dyeing method of natural fibre (cotton cloth). Said method includes the following steps: making the surface of cotton cloth undergo the process of formylation treatment, then making supercritical CO2 direct dyeing. Said invention also relates to a polylactic acid fibre low-temperature waterless dyeing method which can not make 'high-temperature' dyeing by using water as medium. In order to implement the above-mentioned two fibre waterless dyeing methods, said invention also provides a waterless dyeing equipment.

Description

technical field [0001] The present invention relates to a method and a device for anhydrous dyeing of natural fibers (cotton) and polylactic acid fibers. Background technique [0002] Dyeing methods using water as a medium in the textile industry can extend for thousands of years. Anhydrous dyeing did not appear until the 1990s. Anhydrous dyeing is supercritical dyeing, which is characterized by: [0003] (1) The whole process does not use water at all, so there is no problem of wastewater treatment. [0004] (2) Energy saving: Because no water is used, there is no drying process for textiles after dyeing. [0005] (3) There is no need to add surfactants or other auxiliary agents (Auxiliry). [0006] (4) Generally speaking, the color is more vivid than traditional process dyeing. Compared with traditional dyeing, under the same conditions, the dyeing temperature is lower than traditional dyeing temperature. [0007] (5) The technological process is simpler than traditio...

Claims

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Application Information

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IPC IPC(8): D06P1/673D06P3/58
Inventor 尹恩华王云飞黄迪航
Owner 尹恩华