The waterless dyeing technology jointly developed by Donghua University and enterprises is launched
The waterless dyeing technology jointly developed by Donghua University and enterprises is launched
If you want to change the color of the cloth, just put it into the liquid carbon dioxide containing the dye. The carbon dioxide turns into a gas again. The cloth no longer needs to be rinsed, and it will not fade in the water. This is a waterless dyeing technology jointly developed by Donghua University and Shanghai Textile Holding Group. This technology has recently passed the acceptance inspection, and the prototype used in the production line has been installed and entered the debugging stage.
According to the project leader, Professor Dai Jinjin from the School of Chemistry and Chemical Engineering of Donghua University, this technology mainly uses the characteristic that carbon dioxide can be liquefied at more than 30 degrees Celsius and more than 70 atmospheric pressures. After the carbon dioxide is liquefied, the dye is dissolved in the liquid carbon dioxide to Cloth or thread is dyed. The whole process does not require water or chemical additives, and the carbon dioxide by-product in the production process of the traditional fermentation industry can meet the need for carbon dioxide in the dyeing process and can be reused, especially for the coloring effect of polyester fibers and some high-performance special fibers. good. The entire process does not produce pollution and is both energy-saving and efficient.
It is understood that waterless dyeing is regarded as a revolution in the traditional dyeing and finishing industry. Currently, only a few countries such as Germany, the United States and France have mastered waterless dyeing technology, but it is still in the experimental stage. Germany, which is at the forefront, has developed a 30-liter pilot prototype. Donghua University’s pilot prototype that can be used for production is also in the process of being produced and will be put into use in May. The prototype successfully developed by Donghua University can also be used to dye corn fiber, and dyeing technology for natural materials is also currently under development. YVPjulVz
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