In recent years, the textile industry has been continuously innovating in the development of science and technology, fashion and green fields. Especially in the current era of “low-carbon economy” and energy conservation and emission reduction, the chemical fiber industry in China is looking for a cleaner dyeing method. To solve the environmental pollution problem of dyeing links for a long time. At present, it is recognized as an environmentally friendly coloring method by using a masterbatch method (including polyester masterbatch) for pre-spinning.
Generally speaking, the production of traditional colored fabrics requires multiple processing steps such as spinning (yarn), high-temperature high-pressure dyeing, warping and weaving, etc. The printing and dyeing process is based on the use of conventional spun-spun white polyester filaments with disperse dyes. Dyeing under high temperature and high pressure not only has long process flow, high energy consumption at high temperature, but also discharges a large amount of printing and dyeing sewage, causing certain pollution to the environment.
Color masterbatch (including polyester masterbatch) has three main advantages:
1, can save a lot of manpower and energy.
2, can greatly reduce industrial wastewater discharge.
3. In the field of light color or deep medium color, the cost advantage is obvious.
Experiments show that compared with printing and dyeing, the pre-spinning coloring process is less, there is no process wastewater, and the required energy consumption is low. The coloring power per ton is about 50 degrees, and the dye utilization rate is 100%. From the coloring quality, the color is uniform. High color fastness, lightfastness, washability and abrasion resistance. According to statistics, in 2017 China's polyester fiber production exceeded 40 million tons. Among them, the output of black fiber is 9.1 million tons, and the other colors are 4.9 million tons. As domestic environmental protection requirements become more stringent and labor costs are higher and higher, it is expected that printing and dyeing capacity will gradually decrease in the future for a long period of time. In the long run, masterbatch (including polyester masterbatch) will be used for the stock solution. The number of factories that are colored will increase.
According to industry insiders, the development of pre-spinning coloring technology is very important to promote the sustainable development of the chemical fiber industry and the entire textile industry. What is more important is the long-term social benefits. The pre-spinning coloring technology can solve the high energy consumption of printing and dyeing from the source. The problem of high pollution has helped the textile industry to achieve breakthroughs in energy conservation and emission reduction, bringing long-term benefits to society and industry.
