Sustainable Development Of China's Textile Industry Depends On Upgrading Ecological Dyeing And Finishing Technology

At present, China has become the world. Spin The largest country in printing and dyeing industry. Textile industry not only creates economic benefits for the country, but also causes widespread concern in the society due to resource consumption and pollutant emission. With the enhancement of people's awareness of environmental protection, ecological dyeing and finishing technology has become one of the important foundations for the sustainable development of textile industry.

　　 Dyeing and finishing technology tends to be more ecological.

From a global perspective, dyeing and finishing technologies are becoming more ecological, and dyes and auxiliaries are becoming more green and safer. Dyeing and finishing products are of high quality, multi-function and high added value. Its main technical progress is: efficient short process pretreatment, small bath ratio dyeing, efficient energy saving water washing, energy saving drying, plasma processing and other energy-saving and water-saving production technology, supercritical dyeing technology, laser processing technology, micro suspension dyeing technology, biological enzyme treatment technology, digital inkjet printing technology, ultrasonic processing technology, various functional finishing technology. The key points for the development of the corresponding dyes are green dyes and auxiliaries, and the various color fastness, coloring rate, enhancement and brighness of dyes are still the main goals pursued. The emphasis is on reactive dyes and disperse dyes, and other two dyes. In order to meet the rapid development of digital inkjet printing technology, many companies are developing new ink for rapid digital inkjet printing technology. In addition, new textiles were developed. fibre New dyes such as polylactic acid fiber, Lex fiber and polyethylene terephthalate (PTT) fiber.

　　 Effectively promote energy conservation, emission reduction and consumption reduction

After years of efforts, China's dyeing and finishing process is cleaner, energy saving, emission reduction and consumption reduction being effectively promoted. The key technologies of cotton cold pad batch dyeing, microwave electrodeless ultraviolet photocatalytic oxidation and reprocessing technology for textile printing and dyeing wastewater, new technology of continuous dyeing of fabric denaturing coatings, printing and dyeing wastewater treatment and reuse technology, and COOLTRANS cold transfer printing Technology, the key technologies of low temperature rapid pretreatment of textiles, the integrated technology and equipment of resource recycling in batik industry, and so on. Textile industry The task of energy saving and emission reduction targets has been fully completed, and the comprehensive energy consumption per unit added value has decreased by about 32%. The amount of fresh water taken from 100 meter dye printing cloth has dropped by 37.5%, and the water reuse rate in the printing and dyeing industry has increased to 15%. The sewage discharge volume per unit added value has decreased by more than 40%, and the added value of textile products has also been continuously improved at the same time.

　　 New breakthroughs must be made in ecological dyeing and finishing.

China's annual dyeing and processing machine woven fabric about 60000000000 meters, knitted fabric about 12000000 tons, standard coal consumption 30 million tons, wastewater discharge 30 million tons, CODcr emission of 280 thousand tons, the water resources and environmental carrying capacity of China has posed a huge challenge. Compared with the level of textile printing and dyeing technology in developed countries, the water consumption and energy consumption per unit product in China are 2~3 times higher than that in developed countries. The average content of pollutants produced in wastewater is about 2 times that of the developed countries, which is obviously different from that of the "ecological civilization" society. At present, some high toxic and harmful textile chemicals are still in use in the textile dyeing and finishing industry. 26 of the 70 environmental hormones have been identified, which are seriously related to product safety and environmental ecology. In general, China's dyeing and finishing industry has a big gap compared with the international level in terms of breaking through the "technical trade measures", "green barriers" and "Blue Barriers" set by developed countries.

We should follow the trend of dyeing and finishing products with high quality, functionalization, ecological dyeing and finishing, and green and safe development of dyes and auxiliaries. 前处理工艺技术在高效退煮漂短流程、生物酶前处理、冷轧堆前处理、针织物连续平幅前处理等基础上进一步发展，适应“生态、节能”的要求，突破棉织物低温漂白、针织物冷轧堆前处理等重点技术;染色工艺技术在冷轧堆染色、小浴比染色、涂料连续轧染、低盐少盐活性染料染色、活性染料受控染色等清洁生产技术基础上，进一步适应“生态、高效”的要求，突破无水少水染色、活性染料湿短蒸染色、针织物平幅冷轧堆染色等重点技术;印花工艺技术的发展适应“高效、高品质”的趋势，在第二代、第三代喷墨印花技术的基础上，发展新一代的数字喷墨印花技术;后整理技术随着全球纺织服装向“多功能化、智能化”和“生态化”的发展，加快发展无甲醛高水平免烫整理关键技术、新型 Polyester fiber High efficiency halogen containing flame retardant technology and other technologies, and develop fluoride free waterproofing agents, protective textiles, smart textiles and other technologies to achieve product diversification, personalization, and improve domestic products. Fabric The grade and the added value.