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"Runli · 2021 China Cotton Textile Industry (Hefei) Development Conference And National Sizing And Sizing Technology Annual Meeting" Held
Reporter Hao Jie
At present, sustainable development has become a global industry consensus and a major issue of international competition and cooperation. China has also announced the goal of achieving a carbon peak by 2030 and achieving carbon neutrality by 2060“ "Carbon to peak, carbon neutral" will also be the new competitive advantage and important focus of cotton textile industry. To help achieve carbon peak is not only the internal requirement of enterprises to achieve high-quality development, but also the unshirkable responsibility of textile enterprises. In this context, the industry needs to build new comparative advantages in technological innovation, manufacturing innovation and rule innovation, so as to achieve the "win-win" of low-carbon development and capacity improvement.
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On July 16, "Runli · 2021 China cotton textile industry (Hefei) development conference and national sizing and sizing technology annual meeting" was held in Hefei, Anhui Province. The meeting was hosted by China Cotton Textile Industry Association, organized by environmental protection sizing Committee of China Cotton Association, and co organized by Hefei Runli textile new materials Co., Ltd. the meeting also received special support from Jiangsu Golden Sun Textile Technology Co., Ltd. With the theme of "carbon peak and cotton weaving" as the theme, the impact and opportunities brought by carbon peak to China's textile industry, the situation of cotton textile industry were analyzed, and the development of fabric products, green sizing and other aspects were discussed and exchanged.
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Dong Kuiyong, President of China Cotton Textile Industry Association; ye Liang, executive chairman and Secretary General of Anhui Textile Industry Association; Gao Weidong, vice chairman and Secretary General of China Textile Engineering Association and former vice president of Jiangnan University; Dai Jun, director of environmental protection sizing Committee of China Cotton Textile Industry Association and chairman of Jiangsu Yueda Textile Group Co., Ltd, Ma Linwei, vice president of Low Carbon Economy Research Institute of Tsinghua University, director of planning and Development Department of Institute of climate change and sustainable development of Tsinghua University, Zhang Haifeng, chairman of Hefei Runli textile new materials Co., Ltd., and responsible persons from Textile Universities and upstream and downstream enterprises of industrial chain attended the meeting. The meeting was presided over by Wang Yao, vice president of China Cotton Textile Industry Association.
Climate revolution is an opportunity for textile industry to rise
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At present, China's cotton textile industry has more than half of the global spinning and weaving capacity, which provides a strong supply guarantee for the healthy development of downstream industries. In his speech, Dong Kuiyong reviewed the achievements of cotton textile industry in the 13th five year plan. The technical equipment level of China's cotton textile industry has been continuously improved. The ownership of high-speed looms and automatic warp knitting machines has increased by 26% and 55% respectively. The level of intelligent production and modern management has been greatly improved. The product structure has been continuously optimized, the pace of green production has been accelerated, and the total consumption of PVA has decreased by more than 5%, which has laid a solid foundation for the sustainable and high-quality development of cotton textile industry.
In view of the national "double carbon" goal, Dong Kuiyong thinks that it is not only a pressure but also a driving force. From the implementation significance of the long-term development of the industry, building a green and low-carbon industrial system is not only a key measure to deal with climate change, but also an inevitable path for China's textile industry to achieve sustainable development“ "Carbon peak" and "carbon neutral" will accelerate the transformation and upgrading of China's cotton textile industry, and promote industrial innovation, green and low-carbon development.
Dong Kuiyong said that over the years, under the guidance of the association and the active efforts of enterprises, a number of excellent enterprises with the development purpose of "green and low carbon" have emerged in the cotton textile industry. Advanced models such as "environmental protection sizing demonstration enterprises" and "environmental protection sizing research and development base" will continue to lead the green development of the industry, and implement the green and low-carbon concept in product research and development In the whole process of production and supply chain management, efforts should be made to improve production efficiency and expand market space.
The proposal of the national "double carbon" goal will be reflected in the policy system and industrial regulation. Dong Kuiyong hopes that the industry and enterprises should make timely adjustments and incorporate green development into their strategic system, production system, innovation system and value system, so as to win the initiative in the future. ?
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Ye Liang, executive chairman and Secretary General of Anhui Textile Industry Association, said in his speech that Anhui is an important textile industry cluster in Central China, and the scale of textile industry ranks seventh in China“ During the 14th Five Year Plan period, Anhui will develop a modern fashion industry system with integration and driving effect based on the new textile materials in Chuzhou, Lu'an and other modern textile and clothing industries, such as down and wedding dresses, and relying on high-quality resources such as science and technology, commerce, culture and tourism in Hefei metropolitan area; With Huamao Group, Shenzhou knitting, Zhongtian textile and other leading textile enterprises, as well as Wangjiang, Yuexi and other characteristic textile industrial clusters as the core, a modern textile industry demonstration zone along the Yangtze River will be built; We will promote northern and Western Anhui to undertake industrial transfer in the Yangtze River Delta and build new advanced textile industry bases. Through all efforts to create a high-level and modern textile industry system, we will help Anhui improve its development potential in the Yangtze River Delta integration development and a new round of regional pattern reconstruction, and show Anhui's responsibility in building a new development pattern of the textile industry in the whole country. ?
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Over the years, Hefei Runli textile new materials Co., Ltd. has provided long-term support for green sizing industry. Zhang Haifeng, chairman of the company, said that the size seems simple, but it is very important. Hefei Runli has been committed to providing environmental protection and high-quality products for the textile industry based on products and service orientation. He hopes that you will continue to pay attention to Runli, which will contribute to the industry with new products that completely replace PVA.
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Ma Linwei, vice president of the Institute of low carbon economy, Tsinghua University, and director of the planning and Development Department of the Institute of climate change and sustainable development of Tsinghua University, delivered a speech on the strategic interpretation and action enlightenment of carbon peaking and carbon neutralization from three aspects: climate science and governance, coping Technology and management, market and enterprise transformation.
As for the reasons for the high energy consumption of China's industry, Ma Linwei believes that the first reason is the economic development stage and industrialization stage. The scale of production capacity is huge, and the proportion of high energy consuming industries in GDP is high; The second is the dual structure of the industrial industry (low industrial concentration). While it has the world's advanced large-scale production capacity, there are also a large number of backward small-scale production capacity; The third is that resource recycling is relatively backward, and resource recycling can significantly reduce product energy consumption.
As for the feasible low-carbon practices of enterprises, Ma Linwei proposed that coping with climate change should be taken as an important strategic direction, actively undertake social responsibility, innovate business models and participate in Climate Governance; Strive to achieve the top level of energy conservation, emission reduction and renewable energy utilization; Develop or require suppliers to provide low-carbon energy and materials; Low carbon concept and knowledge are transmitted to downstream consumers through products and services. Ma Linwei finally said that the industrial revolution began in the textile industry, and the climate revolution is also a historical opportunity for the textile industry to rise again.
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Ouyang Xiazi, Deputy Secretary General of China Cotton Textile Industry Association, analyzes the current situation and Prospect of China's cotton textile industry. In terms of the overall situation of the industry, by 2020, China's spinning capacity will reach 110 million spindles and 1.04 million looms. Among them: advanced spinning capacity accounts for about 30%, shuttleless loom accounts for about 92%. The production capacity will gradually develop to intelligence, automation and green. For the operation of this year's industry, in the first half of 2021, the domestic cotton price will be low first and then high, showing an overall "upward" trend, with an average of about 16000 yuan / ton. The price of polyester and viscose staple fiber decreased as a whole, with a decrease of 2000 yuan / ton since the beginning of the year. The difference between domestic and foreign cotton prices narrowed compared with the second half of last year. The price of domestic gauze fluctuated upward. At present, the order situation of textile enterprises is fair, and the utilization rate of spinning and weaving equipment is 94% and 92% respectively. Among them, 90% of the enterprises whose spinning equipment opening rate is higher than 85%; The utilization rate of weaving equipment is higher than 85%. From January to may, the yarn and cloth output of key cotton textile enterprises increased by 22.78% and 8.31% respectively. In the first quarter, the market sales situation was good, as in the second quarter, the sales gradually weakened, and the downstream demand was insufficient. By the end of May, yarn sales of key cotton textile enterprises increased by 28.5% year-on-year, while cloth sales increased by 18.7%.
For the trend outlook, raw materials and products: the consumption of non cotton fiber is growing rapidly, and the differentiation and functionality are becoming stronger and stronger. In the aspect of green energy saving, the intelligent spinning production can improve the spinning efficiency and reduce the unit labor, but it does not significantly increase the power consumption per unit product; With the high speed of weaving, intelligent management of air compressor and continuous optimization of jet nozzle, the power consumption efficiency of loom is also significantly improved. In the ten years of environmental sizing, the consumption of size and PVA in cotton weaving industry increased by about 8% over the same period of last year, and decreased by more than 8% significantly. In terms of intelligence: enterprises transform "experience" into digital models, and the application of artificial intelligence is gradually increasing, and certification, standards and patents are becoming more and more important. In terms of talent and innovation mode, labor cost is gradually increasing, talent shortage is obvious, and enterprise brand awareness is gradually enhanced.
Two forces of product development
Jiangsu Golden Sun is a design and development and marketing services as one of the bedding fabric suppliers. As the only "national industrial design center" in home textile industry, the transformation of research and development achievements of golden sun has its own characteristics. Their R & D philosophy is: health, safety, comfort, environmental protection and sustainability. ?
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Chen Hongxia, R & D director of Jiangsu Golden Sun Textile Technology Co., Ltd., shared the theme of "market demand of high-end home textile bed fabric and difficulties in achievement transformation". The essence of golden sun's business model is a design and R & D service platform integrating resources and creating value. Through the integration of supply chain resources and domestic and foreign design and research institutions, the company carries out design and development, technology development and marketing on the golden sun platform, providing customers with integrated solutions with finished fabric as the core. In short, design and development, technical research and development, marketing planning, marketing, all completed by the company, production and processing commissioned supply chain strategic partners. Therefore, for golden sun, it is particularly important to build the core competitiveness of design and development.
In 2012, golden sun took the lead in launching non PVA home textile bedding fabrics in the home textile industry. Not only the finished fabrics are healthy and safe, but the processing process is also green and environmentally friendly. In 2015, the company established a healthy sleep microenvironment theoretical system. From 2015 to 2020, all bed fabric research and development are carried out around the five dimensions of healthy sleep microenvironment. When this theoretical system is applied to the development of a specific product in different regions, different populations and home environments, it is necessary to specify the development objectives and set the process route in combination with the actual situation, so as to continuously improve through experiments and tests. New products in autumn and winter 2015, the company applied deep-sea repair factor to bed products, giving the bedding fabric moisturizing and antibacterial functions, and giving consumers a warm, moist, clean and soft sleep experience. With the outbreak of the new crown epidemic in 2020, in view of the improvement of consumers' health awareness and the change of consumption concept, the company upgraded the cleanliness of sleep microenvironment, and endowed the antibacterial and antiviral functions into the bedding fabrics. Chen Hongxia concluded that the R & D and innovation of bed fabric are essentially the same as those in other industries. They are driven by two forces. One is the reverse thrust from the consumer market demand, which reverses the product development; The other is the driving force from the vision of technological innovation. ?
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With the improvement of living standards, consumers' pursuit of towel products is no longer limited to appearance and use. New materials and functional products are favored. However, the outstanding advantages of ordinary towel are limited to 1-2 items. Developing a towel with multiple advantages is the goal of Vosges home textile. Wang Guoli, section chief of vosge Home Textile Co., Ltd., made a report on the design, development and market demand analysis of retro bamboo charcoal fiber quilt products. It is found that the structure of bamboo charcoal fiber is unique. It takes bamboo as raw material, which makes bamboo charcoal have micro holes and honeycomb.
The company makes full use of its unique porous structure, carries out research from product design, process parameters and technological innovation, carries out new design on fabric structure and appearance, adopts environmental protection technology in post-treatment process, reduces cost, and uses environmental protection sizing material for sizing. At present, the products are very popular in European and American markets. When it comes to innovation experience, Wang Guoli believes that there are two ways to develop products: technological innovation and portfolio innovation. The so-called scientific and technological innovation is relatively professional, suitable for higher scientific institutions or universities and enterprises with scientific research strength. Portfolio innovation is suitable for most production enterprises and colleges. This case is a combinatorial innovation, which uses the bamboo charcoal fiber selected from the existing regenerated fibers and combines its characteristics to reasonably design the production process, including the use of high-performance low viscosity starch, tea saponin composite additives, and the technology of mature product design team. A perfect product R & D will play a huge market value. R & D innovation is the driving force of energy development of unit groups. Only by constantly developing projects suitable for the development direction can enterprises have a foothold in the market.
New breakthrough in replacing PVA with environmental friendly size
In order to smooth the production of the loom, it is necessary to size the warp on the sizing machine. After weaving, desizing is carried out in the pretreatment process of the printing and dyeing plant to obtain the pretreated fabric after complete desizing, and then go to the next bleaching or dyeing process. The goal of environmental sizing is to replace PVA with environmentally friendly size.
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Zhang Haifeng, chairman of Hefei Runli textile new materials Co., Ltd., introduced the difficulties and paths of environmental friendly sizing by replacing PVA with "research and development and application of new low sizing and environmental friendly sizing". Zhang Haifeng said frankly, in the pure cotton high count high density variety, the polyester cotton high count high density variety, the new fiber and the chemical fiber variety also had to use PVA sizing. To achieve environmentally friendly sizing, it is necessary to realize easy degradation or low sizing. At present, the spinning technology is breaking through, and some yarns can not be sizing. If it is necessary to size, use the size that is easy to decompose and adopt low sizing process as far as possible to reduce the size of sizing, so as to directly reduce the desizing sewage and sludge. At present, polyacrylamide slurry is the most suitable. After nearly five years of research, the company's new polyacrylamide size is finally mass produced, which can be used as the main sizing material for textile sizing, product grade M-5A textile size. Its sizing can completely replace the "last" PVA and realize environmental sizing. Its advantages are easy sizing, easy desizing and environmental sizing. At present, the product can achieve pure flax sizing, denim can achieve no desizing.
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In recent years, many home textile brands have put forward the requirements of environmental sizing for fabric weaving companies, and the same standard has been put forward for high count and high tightness pure cotton varieties. At the same time, if such varieties adopt the technology containing PVA, the yarn flexion and weaving beating up property are not good, and it is easy to produce start-up and shutdown rungs Super soft handle and drape can not meet the brand requirements; In the production process, the key points of sizing and weaving are to meet the wear resistance, reduce warp break and improve weft insertion. Yu Peng, deputy general manager of Jiangsu Yueda Home Textile Co., Ltd., introduced the application of several environmentally friendly sizing processes on high count and high tightness fabrics. He analyzed the difficulties in weaving pure cotton high count and high tightness home textiles. Through the optimization of sizing formula and sizing process, the confirmation of sizing equipment capacity, the optimization of heald reed equipment, and the tackling of key problems in weaving process, weaving was successfully realized. The loom efficiency was above 92%, and the next machine first-class product rate was 95%.
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Yao Yijun, associate professor of Xi'an University of technology, shared the book "methods and mechanisms of improving the properties of starch size". He introduced that the existing problems of starch size are: starch size can be fully gelatinized at high temperature to form a size with good performance, starch film can only have good performance when plasticized under high humidity, and starch sizing yarn can be woven under high sizing rate. The way to improve the properties of starch size is to reduce the gelatinization temperature of starch, etherification of quaternary ammonium salt can reduce the gelatinization temperature of starch, and prepare medium temperature gelatinizable starch size; To improve the moisture absorption and moisture retention ability of starch, high moisture absorption and moisture retention starch can be prepared by using the ring opening principle of epoxy compound and starch reaction; In order to solve the problems in the performance of starch size produced by dry process, high performance copolymeric starch size can be prepared by using the principle of Interfacial Compatibilization. He said that he hoped to break through the traditional weaving mode of high humidity and high sizing rate by improving the performance of starch size, so as to provide technical support for reducing energy consumption, improving workshop environment, and promoting the development of sizing and weaving technology.
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In order to get high quality and low cost sizing effect, choosing and using a sizing machine is an important foundation. Sizing machine from the structure, there are a number of components, the most important part of which is the sizing trough. Therefore, the advantages and disadvantages of sizing groove in structure design, manufacture, installation and use, quality stability and scientific rationality of process design determine the quality of sizing. Wang Zhenghu, consultant of Jiangyin Xiangsheng textile and printing machinery manufacturing Co., Ltd., introduced the influence of the structure and performance of the new pulp trough on sizing. Xiangsheng company focuses on the production and manufacture of multi unit sizing machine. For decades, the structure of other components of sizing machine has not changed much. However, the structure of the sizing trough is greatly changed, because the sizing groove is the key to ensure the sizing quality of yarn. After introducing several structure forms of common pulp trough, Wang Zhenghu thinks that three roller type and four roller type are the first choice. The size of slurry tank should be miniaturized; The yarn should be transported actively in the pulp trough area; Cancel the sealing of the shaft end of the sizing roller to adapt to high-speed operation; In order to increase the pressure of high pressure slurry, it is necessary to increase the dynamic response speed of grouting force adjustment. The new type of three roller or four roller pulp trough completely solves the defects and deficiencies of traditional pulp trough. It provides a good hardware foundation for sizing production with high quality, high efficiency, energy saving and comprehensive cost reduction.
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The meeting also issued the appointment letter of the new environmental protection sizing committee member and consultant, and employed Dai Jun, chairman of Jiangsu Yueda Textile Group Co., Ltd. as the chairman of the Committee. The sixth environmental protection sizing committee also held an enlarged meeting and conducted on-site interactive Q & A.
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