Which is the strong dye-dyeing technology?

On June 3, in order to promote the green sustainable development of China's yarn-dyed industry, accelerate the adjustment of industrial structure, change the growth mode, and promote the energy-saving and emission-reduction work of the yarn-dyed industry, the Science and Technology Development Department of China National Textile and Apparel Council, China Cotton Textile Industry Association and Sponsored by the Textile Light Technology Education Foundation, Linqing Textile Association and Shandong Linqing Sanhe Textile Group Co., Ltd. organized the “Textile Light” color-dyed industry energy-saving and emission reduction key technical achievements on-site promotion activities held in Linqing City, Shandong Province.

On-site promotion activities of key technical achievements in energy conservation and emission reduction of “Textile Light” yarn-dyed industry.

Peng Yanli, deputy secretary general of China Textile Industry Federation, director of science and technology development department, vice chairman of Textile Light Technology Education Foundation, Zhu Beina, president of China Cotton Textile Industry Association, Zheng Jiewen, vice president, and 150 of local government, industry associations and enterprises A number of representatives attended the meeting.

At the conference site, around the theme of “green development, innovative yarn-dyed”, the delegates focused on the discussion and exchanged on the new technology and application of energy-saving and emission reduction in the yarn-dyed fabric industry, new product development, warping technology, clean sizing, small bath dyeing. Key technologies such as yarn.

Cotton spinning development, enterprise transformation and upgrading is still the focus

When talking about the current development status of China's cotton spinning industry, Zhu Beina, president of the China Cotton Textile Industry Association, said that under the background of the decline in macroeconomic growth at home and abroad, the national backbone cotton textile enterprises have accelerated equipment upgrades, product structure adjustments and new product development. Strengthening internal management and other measures, striving to reduce production costs, improve production efficiency, and enhance the competitiveness of enterprises, so that China's cotton textile industry has maintained a relatively stable operating situation.

Zhu Beina said that this meeting will help the textile industry to adjust the industrial structure and transform the economic growth mode, and further promote the green sustainable development of the yarn-dyed fabric industry.

According to the China Cotton Association's tracking enterprise report, the overall operating rate of the industry from January to April this year was normal, and the large and medium-sized enterprises were running smoothly. The cumulative output of various yarns and fabrics increased slightly by 0.20% and 0.22% respectively, including purified fiber yarn and purified fiber. The output of cloth increased by a large margin, both exceeding 5%, but the data showed that the sales of yarns and fabrics of enterprises were still not smooth, and the inventory remained high.

According to the analysis of China Textile Association's Ministry of Industry, the textile industry achieved a stable start in the first quarter, and the decline in exports showed a narrowing trend. According to Customs Express data, China’s textile and apparel exports totaled US$77.49 billion from January to April this year, down 2.7% year-on-year. The decline in exports narrowed month by month. The growth rate from January to April was 13 and 2.5 percentage points higher than the previous two months of this year. Exports of textiles and clothing showed signs of improvement. Among them, from January to March, the total export of cotton textiles and clothing decreased by 2.4% year-on-year, which was less than the industry average.

It is understood that China's yarn-dyed fabric industry has gathered a group of high-end enterprises in China's cotton textile industry. With Lutai Textile as the benchmark, the comprehensive competitiveness of yarn-dyed fabric enterprises is higher than that of ordinary spinning and weaving enterprises, but these two years It is also plagued by various unfavorable factors such as declining domestic and foreign sales demand, rising costs, and increased competition.

Looking forward to the development of the industry this year, Zhu Beina said that market demand is difficult to pick up in a short period of time. The cotton textile industry and yarn-dyed fabric enterprises still need to focus their development on transformation and upgrading, such as accelerating the optimization and upgrading of production capacity and accelerating the transformation of product structure. Accelerate the integration of upstream and downstream industrial chains of cotton textiles.

"Only by ensuring the competitiveness of enterprises and products, we can resist the negative impacts of the market and policy factors, maintain the profit rate without falling, and maintain a stable, healthy and sustainable development of the yarn-dyed fabric industry." Zhu Beina said.

Technology Exchange

Lixin: Small bath ratio one-way outflow cheese yarn dyeing technology

During the technical exchange session of this conference, the delegates introduced the key technologies and key achievements of energy-saving and emission reduction in China's yarn-dyed industry in recent years, and exchanged views on this.

As the leader of the global dyeing and finishing equipment manufacturing industry, Lixin Dyeing and Finishing explained the superwin high temperature cheese yarn one-way outflow dyeing machine technology at this meeting. Liang Xilong, manager of Lixin Dyeing and Finishing Machinery Co., Ltd., said that under the background of increasing environmental pressure, the production pressure of enterprises has also increased. For the dyeing of cheese yarns, one-way full-flow dyeing provides a low bath ratio.

Through several years of one-way low bath ratio dyeing practice for cheese yarn, Lixin first successfully applied on allwin plus, and on this basis, developed a superwinning single yarn dyeing machine with lower bath ratio, mainly used in cotton. And the yarn-dyed industry of blended fibers.

Liang Xilong said that Lixin's superwin dyeing machine has excellent performance and low bath ratio, and is an energy-saving and environmentally-friendly model that meets the current national and industry green development requirements. According to reports, the dye bath ratio of allwin plus is 1:4.0 to 1:5.0, while the bath of the superwin dyeing machine can be 1:3.5 to 1:4.0 in general.

Suntory: Multi-color new yarn continuous coating dyeing technology

At this meeting, Ma Xinhua, Chairman of Zhangjiagang Suntory Dyeing & Finishing Technology Co., Ltd. explained the application of new yarn dyeing products in the field of yarn-dyed. According to reports, at present, the core of Suntory dyeing and finishing technology lies in the multi-color yarn continuous coating dyeing technology. This technology has obtained 10 national invention patents.

Ma Xinhua said that the corona discharge technology used in the project can achieve rapid modification of the yarn, using ultrasonic cavitation technology to improve the permeability and uniformity of the modifier, and through the adhesive, coupling agent and fixing agent. Synergistically enhances the adhesion of the coating to the fiber to achieve the purpose of dyeing. From the perspective of technical application, this technology can achieve dyeing of light, medium and dark colors on various fibers such as cotton, polyester and linen.

Lu Thai: warp foam sizing technology and additives

At this meeting, Liu Liqiang, director of the weaving division of the Weaving Division of Lutai Textile Co., Ltd., explained the results of research and industrial application of foam sizing production.

At present, the existing sizing machines in the industry generally adopt the immersion sizing method. In the sizing process, it is easy to cause excessive penetration of the slurry into the inside of the yarn, so that the sizing efficiency of the warp yarn is too high, the difficulty of desizing is increased, the cost is high, and the consumption is large. . The warp foam sizing technology and additives developed by Lu Thai can break this situation.

Liu Liqiang introduced that Lutai's warp foam sizing has the characteristics of low sizing, easy desizing and energy saving, and the sizing quality index and manufacturing efficiency can reach the level of immersion technology. According to reports, Lutai's technology has achieved a breakthrough in the foam sizing method from the experimental stage to the industrialization promotion, which can improve the efficiency of sizing technology, improve the ecological processing and production technology of textile products, and thus break the "green" of textile exports. barrier".

At present, foam sizing technology has a good market demand in the environment of environmental protection and low-carbon recycling in domestic and foreign industries, and can also play a technical support role in national energy conservation and emission reduction activities.

Key technical achievements of energy-saving and emission reduction in yarn-dyed industry

Result 1: Multi-color new yarn continuous coating dyeing technology and equipment

Unit: Zhangjiagang Suntory Dyeing & Finishing Technology Co., Ltd.

Achievements: The project uses corona discharge technology to achieve rapid modification of the yarn, using ultrasonic cavitation technology to improve the permeability and uniformity of the modifier, and improve the synergistic effect of the binder, coupling agent and fixing agent. The combination of paint and fiber to achieve the purpose of dyeing. The technology can achieve dyeing of light, medium and dark colors on various fibers such as cotton, polyester and linen. Using this technology to dye the yarn, the water intake, waste water production, COD production amount does not exceed 1.6 tons / ton yarn, 0.2 tons / ton yarn, 0.3 kg / ton yarn, power consumption does not exceed 2300 kWh / ton yarn; consumption The standard coal quantity does not exceed 265kg/ton yarn; the yarn loss during dyeing process does not exceed 2%. The technology won the second prize of Science and Technology of China Textile Industry Federation in 2014.

Result 2: Warp foam sizing technology and additives

Unit: Lutai Textile Co., Ltd.

Achievements: The project systematically studied the warp foam sizing technology and realized industrialization. Based on the research of foam sizing theory and process technology, the traditional sizing equipment is optimized, the foam sizing device is developed, and the foam sizing process is optimized. The technology is applied to 50 or less single yarns and 100 or less strands of yarn-dyed products. Under the premise of ensuring sizing quality and weaving efficiency, the warp sizing rate can be reduced by 2%, and the slurry and standard coal can be saved as 26.9 respectively. %, and 21.6%; in the desizing process, the amount of auxiliary agent, water consumption and desizing wastewater treatment can be reduced by 34.4%, 25.4% and 10.6%, respectively. The technology won the first prize of the 2015 China Textile Industry Federation Science and Technology Award.

Result 3: Small bath ratio one-way outflow cheese yarn dyeing technology

Unit: Lixin Dyeing and Finishing Machinery (Shenzhen) Co., Ltd.

Results introduction: This technology combines the independently developed wave dyeing and pulse control frequency conversion technology, and uses the main pump to generate a pressure difference through a specific rhythm changing frequency, so that the cheese yarn can be dyed in a unidirectional dyeing state to achieve the effect of two-way dyeing. And can effectively prevent the deformation of the cheese yarn, improve the dyeing efficiency, and improve the yarn feel. This technique is used to dye the cheese and the bath ratio can be as low as 1:3. In the black dyeing process of pure cotton varieties, the bath ratio is 1:3.5, the water saving is 59.4%, the power saving is 58.6%, the steam saving is 76.7%, and the saving aid is 38.5%. The technology won the "Mechanical and Mechanical Tool Design Award" in the Hong Kong Awards for Industry and Commerce in 2013, and the "Science and Technology Achievement Award" in the Hong Kong Awards for Industry and Commerce in 2013. In 2015, it was shortlisted in the "China Cotton Textile Industry Energy Conservation and Emission Reduction Technology and Innovation Application Catalogue" (third Batch).

Result 4: Research and development of key technologies for pure cotton ultra-fine high-density elastic yarn-dyed fabrics

Unit: Jiangsu Lianfa Textile Co., Ltd.

Achievements: The project adopts high-efficiency dyeing treatment system of ultra-fine cheese, high-permeability, low-viscosity and high-concentration sizing technology. The 360S/2 concentrating siro spinning yarn is pretreated, and the ultra-fine is developed through the preferred weaving process. High-density stretch-dyed fabric. This fabric is soft, smooth, silky, high elasticity, comfortable and has high elongation at break. This project won the first prize of Science and Technology of China Textile Industry Federation in 2015.