Create A Green Future And Introduce A New Chapter Of Printing And Dyeing! Exploring The New Quality Productivity Of Knitting Printing And Dyeing

Those who adapt to change will live forever, those who innovate will live forever, and those who continue to struggle will thrive. On August 2, with the theme of "creating a new chapter of intelligent printing and dyeing for a green future" Lixin · Yelin 2024 Knitting Printing and Dyeing Technology Exchange Meeting It was held in Yantai, Shandong Province. Industry leaders, experts and scholars gathered together to discuss new technologies, new processes, new models and new paths in the knitting printing and dyeing industry, so as to brainstorm ideas and bring new opportunities for the high-end, efficient and high-quality development of textile manufacturing.

The conference was hosted by China Knitting Industry Association, named Lixin Dyeing and Finishing Machinery (Guangdong) Co., Ltd., Yantai Yilin Textile Technology Co., Ltd., and co organized by Taihe New Material Group Co., Ltd., and supported by Hongda Smart Technology Co., Ltd., Liuya Technology Co., Ltd., and Shanghai Annuoqi Group Co., Ltd.

Lin Yunfeng, President of China Knitting Industry Association, Wang Qun, a cadre of the Textile Department of the Consumer Goods Department of the Ministry of Industry and Information Technology, Li Xuguang, a fourth level researcher of Yantai Municipal Bureau of Industry and Information Technology, Zhang Xicheng, Yin Jinhua, Wang Sijie, Wang Jun, Vice President of China Knitting Industry Association, Qu Jing, Director of the Expert Technical Committee of China Knitting Industry Association, and Cai Zaisheng, Deputy Director, Xu Lixin, Deputy Secretary of the Party Committee and Vice Chairman of Taihe New Material Group Co., Ltd., Wei Jinlong, Chairman of Yantai Yilin Textile Printing and Dyeing Technology Co., Ltd., Qin Jiancheng, Director of Lixin Dyeing and Finishing Machinery (Guangdong) Co., Ltd., Du Yuchun, Vice President of Taihe New Material Group Co., Ltd., and Gu Ren, Chairman of Hongda Intelligent Technology Co., Ltd, Luo Wensheng, Deputy General Manager of Luya Technology Co., Ltd., Fu Shaohua, Deputy General Manager of Dyeing and Chemical Business Department of Shanghai Annuoqi Group Co., Ltd., Han Guangting, President of Shandong Textile Engineering Society, Dong Jingshou, Secretary of the Party Committee of Haiyang Knitting Sweater Industry Association, Fang Yi, Secretary of Yiwu Socks Industry Association, Rao Jie, Deputy Secretary General of Shantou Textile and Clothing Industry Association, Zhang Hong, Deputy Secretary General of Wuxi Textile Industry Association, and others attended the meeting.

The meeting was co chaired by Li Hong, vice president of China Knitting Industry Association, Han Guangting, chairman of Shandong Textile Engineering Society and professor of Qingdao University.

Strengthen the top-level structure and enhance the new driving force for high-quality industrial development

As one of the birthplaces of China's modern national industry, Yantai has a solid industrial foundation and strong industrial strength. In 2023, there will be 152 enterprises above the designated size in Yantai's textile industry, and 16 high-quality enterprises above the provincial level will be cultivated in total, realizing an operating income of 15.5 billion yuan and a profit of 1.4 billion yuan. Li Xuguang, Grade IV Investigator of Yantai Municipal Bureau of Industry and Information Technology He said that printing and dyeing is an important part of the knitting industry. It plays an important role in improving product quality, beautifying the appearance, and endowing products with functions and values. It is also a key link in determining whether knitwear and their production processes conform to green ecological standards. It is crucial for the knitting industry to achieve high-quality development and build a modern industrial system. The holding of this conference will further enhance the scientific and technological innovation capability of the printing and dyeing industry, accelerate the transformation and in-depth application of scientific and technological innovation achievements, promote the industry to move towards the global strategic high-end, and achieve new leaps in high-quality development.

"At present, China has entered a new 'reform time'. Geopolitics, technological transition, market adjustment and industrial integration are intertwined. We need more balance and determination between choices; and more foresight and wisdom between breakthroughs." Lin Yunfeng, President of China Knitting Industry Association He said that printing and dyeing is a technology intensive and value intensive hub link in the textile industry chain, and also a throat department related to industrial safety and development. At the critical stage of the overall industry transformation and upgrading, the industry should give new thought to the industry's positioning and role from a strategic and long-term perspective, and carry out industrial research guided by the early ideas of the "Tenth Five Year Plan"; Promote industrial innovation by building a new national system; Build an industrial system by focusing on specialized new enterprises and future industries; With ecological value and people's livelihood value as the core, consolidate industrial responsibility. Especially focusing on new materials, equipment and other fields, strengthening basic research and original innovation; Based on "big data+big computing power+strong algorithm", promote the in-depth development of intelligent design, intelligent manufacturing, flexible supply chain, etc; Focusing on ESG practice, promote the integrated development of "carbon reduction, pollution reduction, green expansion and growth".

"In the first half of 2024, the supply and demand sides of the knitting industry will continue to maintain a steady growth trend, the domestic market will continue to recover, exports will remain stable, the trend of enterprise economic efficiency will be better, development confidence will be restored, and the trend of stable and good economic operation will be further consolidated." Zhang Xicheng, Vice President of China Knitting Industry Association and Deputy Director of Information Department of China Textile Industry Federation This paper analyzes the economic operation situation of China's knitting industry in the first half of 2024, which is mainly reflected in the year-on-year growth of the main revenue of the knitting industry, the continuous improvement of operating efficiency, the continuous recovery of foreign trade, and the steady growth of domestic sales. Looking forward to the whole year, the development situation facing the knitting industry is still complex and severe, and the foreign trade of the industry is still under pressure. It is necessary to deepen internal reform, strengthen innovation drive, flexibly adjust strategies, seize opportunities, promote the industry to move forward steadily in adversity and achieve high-quality development while dealing with the complex and changing environment at home and abroad.

For the development of the knitting printing and dyeing industry, Zhang Xicheng said that first, we should focus on science and technology, develop knowledge-based, capital intensive high-tech, high value-added industries, shift from "factory centered" to "user centered", and provide one-stop solutions for customers through innovative allocation of production factors; Second, we need to focus on intelligence. At this stage, the development process of industry digitalization and intelligence is constantly accelerating, the digital level of production and manufacturing is making rapid progress, and the penetration rate of industrial software applications and enterprises using cloud is steadily increasing; Third, we should focus on green development, build green competitiveness, and take the initiative in the future market.

"Production, learning, research and application" linkage to build new advantages for collaborative development of upstream and downstream

In the report "Intelligent and automated management of knitting dyeing plants", Qin Jiancheng, Director of Lixin Dyeing and Finishing Machinery (Guangdong) Co., Ltd This paper introduces the degree of digitalization, automation and intelligence of the intelligent dyeing factory, and introduces the performance and characteristics of equipment such as FC68 controller, SOFTWIN high-temperature overflow dyeing machine, DYECOWIN high-temperature high-speed chemical fiber dyeing machine, GOLLER high-efficiency water washing box, Lixinmen Fuji 888TwinAir, etc. He pointed out that on the basis of high stability of the equipment, the equipment itself is required to be digital, and the system automatically collects all kinds of data in the production process to realize the functions of remote operation and maintenance and digital production; Not only equipment automation is required, but also logistics automation is required. The whole process can run automatically from the gray fabric warehouse - dyeing - finishing - quality inspection - finished product packaging - delivery; Use the collected data to carry out artificial intelligence analysis and calculation, so that the whole process and process can realize intelligent control, and the dyeing factory can carry out intelligent management from the gray fabric silo to the finished product. He also said that the intelligent data application plan includes three stages: one is to realize intelligent control; Second, realize independent learning; The third is to generate the optimal scheme through independent judgment.

As the pioneer and leader of new polymer materials in China, Taihe New Materials integrates polymer new material technology companies, special fabric ODM global factories, new energy system solution providers, and green chemical manufacturers, focusing on six major tracks of intelligent wear, green manufacturing, bio based materials, information communication, new energy vehicles, and green chemicals. Sun Qiancheng, General Manager of Strategic Key Customer Department of Advanced Textile Business Group of Taihe New Material Group Co., Ltd. and Marketing Director of Taihe Lottery Introduced Ecody ? Sustainable color solution for fabrics, which is a water-saving green printing and dyeing technology first launched by Taihe New Material in the world, uses natural biomass as raw material, endows textiles with the performance of rapid dyeing under salt free, alkali free and normal temperature conditions, is eco-friendly, low-carbon and clean, and water resources can be 100% recycled, completely changing the traditional printing and dyeing industry's high energy consumption, high pollution High emission status.

"Accelerating the promotion and application of advanced and applicable technologies and equipment for energy conservation, water conservation and emission reduction is an important measure and inevitable way to promote the green development of the printing and dyeing industry and enhance the international competitiveness of the printing and dyeing industry." Cai Zaisheng, Deputy Director of Expert Technical Committee of China Knitting Industry Association and Professor of Donghua University This paper introduces the development status of printing and dyeing equipment for energy saving, water saving and emission reduction, and introduces in detail the application and development examples of pretreatment equipment, dyeing equipment, printing equipment and finishing equipment. He said that enterprises can use energy-saving, water-saving and emission reduction equipment to save energy and emissions, reduce water consumption, save chemicals and improve production efficiency. In the future, the dyeing and finishing equipment with energy saving, less water and emission reduction will show four major development trends. First, improve the open width processing technology of knitting fabric dyeing and finishing; Second, increase the research and development of digital printing machines; Third, develop personalized and professional dyeing and finishing equipment; Fourth, automation, digitization and informatization are updated.

"Intelligent equipment is an important foundation and support for the printing and dyeing industry to realize intelligent manufacturing. Intelligent detection technology and artificial intelligence technology have become the new quality productivity of the printing and dyeing industry. The printing and dyeing intelligent manufacturing includes four levels: process digitalization, equipment digitalization, management informatization, and decision-making intelligence." Gu Ren, Chairman and General Manager of Hongda Intelligent Technology Co., Ltd Introduced the new development of intelligent knitting printing and dyeing process led by INSHV technology, Hawk Vision's leading intelligent technology of printing and dyeing is the intelligent system of the setting machine based on artificial intelligence technology, the intelligent system of the dyeing machine, and the new generation of cloth inspection system based on artificial intelligence technology. It has successfully solved the problems of the consistency of sample and mass production, the consistency between cylinders, namely, cylinder difference, and reproducibility. In addition, he also introduced INSHK ? The shaping machine "autopilot" system can save 10% of energy consumption; HV-GM200 intelligent online weight tester greatly reduces fabric loss, saves costs, and solves the problem of fabric weight through manual dial weighing.

Liuya Technology Co., Ltd. is committed to assisting textile printers and dyers to make the most intelligent production decisions, and has three core advantages: innovative development, customized integration, and local service. Luo Wenxuan, Deputy General Manager of Liuya Technology Co., Ltd The report entitled "Double axis transformation of textile industry - sustainable intelligent manufacturing" introduced the overall solution of intelligent manufacturing of textile dyeing and finishing plants, LA-IDCC intelligent manufacturing data control center, LA-SMB IoT solution, etc. The overall solution for intelligent manufacturing of textile dyeing and finishing plants can integrate enterprise ERP and production control process, integrate production equipment with intelligent data control center, and integrate the information exchange demand of textile supply chain through the textile industry ecosystem platform; LA-SMB IoT scheme has three advantages: high scalability, high reliability and wide application.

In the theme report entitled "Dyeing and finishing solutions for new fibers, new processes and new products", Wu Dong, Director of Technical Center of Shanghai Annuoqi Group Co., Ltd The characteristics of high fastness disperse dyes such as PUD/PUD-SD series, DRDW environmental protection series, CX series acetic acid fabrics and vinegar/polyester fabrics were introduced. He said that the company's anhydrous dyeing technology does not require dispersants for dyeing. The floating color on the dyed fabric surface can be cleaned by supercritical carbon dioxide fluid circulation without reduction cleaning, saving costs. The residual dyes can be completely recycled in powder form, without sewage discharge. The PLA special disperse dye is a new chemical structure, which is more suitable for the dyeing of polylactic acid fiber, easier to absorb and penetrate the polylactic acid fiber, greatly improving the dye uptake, and being able to dye pure navy blue, black and other deep colors.

　　 Wei Jinlong, Chairman of Yantai Yilin Textile Technology Co., Ltd In the report entitled "Efficient and refined management of printing and dyeing enterprises contributes to high-quality development", it was stated that efficient and refined management includes yarn raw material detection, smart cloud weaving, automatic color measurement and matching, smart cloud dyeing, automatic setting and automatic cloth inspection. Green and intelligent development includes intelligent dispatching, intelligent storage, and reclaimed water reuse system of sewage treatment system. Among them, the advantages of high efficiency, precision and intelligence are reflected in six aspects: first, the labor force employment is reduced by 65%; Second, the production cycle is shortened by 30%; Third, the reproducibility of production increased by 99%; Fourth, energy conservation, consumption reduction, sustainable development, water, electricity, steam, natural gas consumption reduced by 50%; Fifth, low repair rate and high rate of genuine products; The sixth is to visualize the supply chain, open the customer self-service inquiry port, and understand the production progress online in real time.

"Sewage discharge is the biggest pain point for the sustainable development of the fashion industry chain." Wang Jiping, Professor of Shanghai University of Engineering and Technology The report entitled "Progress and Prospect of Textile Dyeing Technology with Zero Wastewater Discharge" introduced non-aqueous pad dyeing technology for woven and knitted fabrics, conventional polyester water bath dyeing, polyester low-pressure waterless dyeing technology, etc. He pointed out that the main problem of the existing water bath dyeing technology is that water is used as the dyeing medium. Due to the waste of dyes caused by low fixation rate, energy, water, time, salt and chemicals are consumed, and a large number of colored wastewater with high electrolyte, high chemicals and high COD is produced. The dye uptake of nonaqueous medium dyeing can reach almost 100%, and is independent of the dye concentration. The hydrolysis rate of reactive dyes in nonaqueous medium dyeing is much lower than that in traditional water bath dyeing. Under appropriate dyeing conditions, the permeability and levelness of nonaqueous medium dyeing are good.

In recent years, the heat of polylactic acid (PLA) has been rising. It is low-carbon, environmentally friendly, biodegradable, and has a wide source of raw materials, which can ease people's dependence on petrochemical resources and also solve the spread of "white pollution". Jiang Huiyu, professor of Wuhan Textile University This paper introduces the dyeing of PLA fiber. PLA is easy to be hydrolyzed and has low dye affinity in the textile field, and PLA has poor heat resistance. Low temperature dyeing is the way of cracking. DES pretreatment improves the surface roughness and chemical activity of PLA filament, giving it good low-temperature dyeing performance. The research of natural eutectic solvent (NaDES) as a new kind of environmentally friendly solvent to treat PLA fabric can promote the environmentally friendly development of textile processing industry. The environmental impact of NaDES pretreatment and dyeing process on PLA fabric is significantly lower than that of traditional PLA fabric dyeing process.

As a zero carbon textile fiber, Lyocell is one of the key raw materials for the green and high-quality development of the textile industry. It has excellent mechanical properties, moisture absorption and water holding properties, unique style and lateral swelling characteristics that draw on the strengths of others. In the report entitled "Lyocell Fiber Chemical Dyeing and Finishing Solution", Fang Kuanjun, professor of Qingdao University The reasons for the fibrillation of Lyocell fiber fabrics - friction in wet state, aggregation structure of fibers, swelling characteristics are analyzed in depth. The main ways to prevent and control the fibrillation of Lyocell fiber fabrics include: first, reducing the use of caustic soda in the dyeing and finishing process; The second is to reduce the continuous high strength friction of the fabric under the humid and hot conditions for a long time; Third, it is necessary to reasonably use anti fibrillar additives and screen suitable dyes and softeners; The fourth is to design reasonable yarn and fabric organization.

　　 Wang Junli, Deputy Chief Engineer of Shanghai Jialinjie Textile Technology Co., Ltd Under the title of "Development of high count weft knitted fine gauge wool products", the company shared its experience in the development and dyeing process of round machine wool products, development of sincere wool dyeing products, common problems, common performance testing and unqualified analysis. By upgrading energy-saving and consumption reducing equipment, the company has taken the road of differentiation and competition. At present, the company has updated the equipment of printing workshop and sewing workshop, effectively improving energy efficiency. At the same time, the color database was established, and the accuracy of the formula was improved by using the automation system.

　　 Liang Jiajun, General Manager of Zhejiang Jiansheng Group Qiaoer Tingting Clothing Co., Ltd With the theme of "new fast dyeing technology for seamless garments", this paper introduces the layout of China's seamless underwear industry, the current situation of dyeing equipment and the pain points of the industry. There are two kinds of dyeing equipment available for seamless garment dyeing. The first is a three-dimensional edge sizing garment dyeing machine, with a dyeing bath ratio of 1:20; The second type is the rolling garment dyeing machine, and the dyeing bath ratio is 1:10. In the future, seamless garment dyeing will adopt more advanced dyeing technology and equipment to save water, energy, steam and time, and develop in the direction of green, low-carbon and environmental protection; Energy conservation and consumption reduction in the printing and dyeing industry is a key area of the national carbon neutral strategy; Intelligent technology innovation promotes industrial upgrading, and the application of digital, automation, informatization, systematization and intelligent technology is the direction of future development.

"Traditional textile dyeing mainly uses water as the medium. Each ton of textiles dyed requires about 50-100 tons of fresh water resources, while a large amount of sewage is generated, which seriously restricts the sustainable development of China's textile industry." Wan Gang, Deputy General Manager of Qingdao Jifa Group Co., Ltd The industrialization practice of supercritical carbon dioxide anhydrous dyeing technology was introduced. Since 2014, Jifa Group has carried out scientific research on supercritical carbon dioxide anhydrous dyeing technology through industry university research cooperation. Over the past 10 years, the project has invested more than 100 million yuan accumulatively. Through more than 10000 research and tests, it has successively solved a number of "choke" technologies such as dyes, equipment and key components, developed key equipment and components such as circulating pumps, valves, dye kettles, and opened up the industrial process line of technology. At present, this technology has reached the international leading level, achieved full color coverage of dyeing process, and realized large-scale production.

In the theme report entitled "Dyeing and finishing technology of high needle and high density polyamide (polyester) ammonia fabric", Chen Qingdong, Technical Director of Honggang Textile Technology Co., Ltd The high needle and high density products, product R&D process, characteristics and application scenarios of low-carbon energy-saving yarn, dyeing and finishing process of bio based polyamide and polyester fiber, low-carbon energy-saving equipment, etc. are introduced. Among them, the low bath ratio O-type dye vat replaces the high bath ratio overflow dye vat to save 151 tCO2 and 30% water annually; High temperature dyeing vat thermal insulation technology uses rare earth and DTcoat thermal insulation materials to conduct thermal insulation coating on all high-temperature dyeing machines, prevent the heat exchange caused by direct contact between dyeing vats and air, form an effective thermal resistance barrier between dyeing vats and the environment or atmosphere, reduce the heating and insulation time in the vat, and thus reduce the use of steam.

On August 1, the delegation visited Yantai Yilin Textile Technology Co., Ltd. and Taihe New Material Group Co., Ltd. On August 3, there will also be a symposium on the knitting industry during the "15th Five Year Plan" period.

(Source: China Knitting Industry Association)