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The Project Of National Advanced Functional Fiber Innovation Center Has Reached The International Advanced Level Through Appraisal

2022/6/17 18:01:00 40

　　 On June 10, 2022, the new technology and new product appraisal meeting of Jiangsu Provincial Department of industry and information technology and the science and technology guidance project appraisal meeting of China Textile Industry Federation were held in Shengze, Suzhou. The national advanced functional fiber innovation center, Jiangsu new vision advanced functional fiber Innovation Center Co., Ltd., Donghua University, Beijing Research Institute of new materials and industrial technology, Beijing University of chemical technology, and The four key technical projects jointly undertaken by Dalian Ruiguang nonwovens Group Co., Ltd. and Beijing Institute of fashion technology have passed the appraisal successfully and reached the international advanced level.

　　 The expert group is composed of Jiang Shicheng, academician of Chinese Academy of engineering; Zhang Huiqin, professor senior engineer of China Textile Industry Federation; Li Rongzhen, professor senior engineer of Jiangsu Textile Research Institute Co., Ltd.; Fu Shaohai, Professor of Jiangnan University; Xiao Changfa, Professor of Shanghai University of engineering and technology; Dai Lixing, Professor of Suzhou University; Jin Gaoling, senior engineer of China Textile Industry Association. Li Lingshen, vice president of China Textile Industry Federation; Zhang chuanxiong, deputy director of science and Technology Development Department of China Textile Industry Federation; Feng Li, director of science and Technology Development Department of China Textile Industry Federation; Wang Wangzhen, director of technology innovation Department of Suzhou industry and Information Technology Bureau; Ma Fengyun, deputy director of Suzhou industry and Information Technology Bureau; Mei Feng, chairman of the innovation center; Wang Yuping, director of the innovation center; and Wang Huaping, general manager of the innovation center, The person in charge of the appraisal project and relevant participating units participate in the meeting online and offline. Li Jian, director of the technical innovation Department of Jiangsu Provincial Department of industry and information technology and a second level inspector of the Department, presided over the meeting.

　　 1. "Titanium" and "direct spinning" technology of pet

　　 ——Xu Jinlong, R & D director of national advanced functional fiber Innovation Center

　　 Project achievement unit

　　 National advanced functional fiber innovation center, Jiangsu new horizon advanced functional fiber Innovation Center Co., Ltd., Donghua University

　　 Project background

　　 In recent years, polyethylene terephthalate (PET) is one of the most productive and widely used polymers in the world. Driven by market demand and technological progress, the domestic and foreign polyester industry chain has achieved leapfrog development. However, its excess capacity structure and stage lead to increasingly fierce competition in the international market, intensified trade frictions, and a decline in industry profitability. It is necessary to speed up the elimination of outdated production capacity and further strengthen technical transformation and upgrading, Improve the ability of industrial chain to deal with market risks. At present, antimony catalysts are mostly used in the production. Antimony compounds in the raw material polyester will be reduced to metal antimony during the processing of polyester fiber, which will affect the processability and product quality of polyester fiber; In the textile post-treatment process, refining, alkali deweighting, dyeing and other processes make antimony in polyester fiber products enter the wastewater, and then pollute the water source; At the end of the life of textiles, antimony or antimony compounds from waste textiles enter the atmosphere and soil through incineration, which may cause harm to the ecological environment in the process of using and recycling PET. The development of environment-friendly antimony free polyester products has become an urgent and important matter related to the national economy and people's livelihood. With the rapid development of polyester industry and the improvement of people's awareness of environmental protection and health, titanium based catalysts with safety and competitiveness will have a wide application prospect.

　　 Main innovations

　　 Titanium catalyst supported on porous carbon materials with high efficiency, stability and hydrolysis resistance was developed; The technology of catalyst cascade addition was developed, and a complete set of key technologies of polymerization and melt direct spinning suitable for large capacity polyester process with four reactors and five reactors were systematically studied and developed. The stable, mild and controllable polymerization of polyester materials was realized, and the grade yield and quality index of the products reached the same level as antimony catalyst.

　　 Project industrialization and Application

　　 The project technology has passed the production verification of large capacity direct spinning device, and realized batch sales; For downstream enterprises, the dyeing cost is reduced. Taking 100 million tons of antimony free polyester products as an example, the antimony consumption is reduced by about 2 tons, and the environmental pollution is reduced, which has good economic and social benefits.

　　 The project has been authorized 2 invention patents, participated in 2 industry standards, and has independent intellectual property rights.

　　 2. "Key technology for preparation of flame retardant polylactic acid and its fiber"

　　 ——Zhu Zhiguo, Professor of Beijing Institute of fashion

　　 Project achievement unit

　　 National advanced functional fiber innovation center, Jiangsu new horizon advanced functional fiber Innovation Center Co., Ltd., Beijing Institute of fashion

　　 Project background

　　 However, the problem of "biodegradable material" such as PLA and starch can be completely solved by "microbial degradation" and "free of microbial pollution" in the production process, It is in line with the concept of sustainable development and circular economy in the 14th five year plan.

　　 Polylactic acid (PLA) is a kind of bio based fat linear polyester, which is usually polymerized from lactide. After being processed into finished products by blow molding, extrusion and spinning, it is widely used in packaging materials, medical devices, textile industry and other fields. The excellent drapability, crease resistance and environmental friendliness of PLA fiber and its products endow it with broad development prospect in textile and garment industry. However, polylactic acid and its products are combustible materials. Once the ignition temperature is reached, the combustion cannot be extinguished naturally and molten droplets with fire will be generated, which will cause secondary damage. The vertical combustion grade is only UL-94 HB (the lowest level), and the limiting oxygen index value is about 20%. The extremely poor flame retardancy limits the application of polylactic acid and its products in many fields. Therefore, it is particularly important to study the flame retardancy of PLA.

　　 Main innovations

　　 In this project, ammonium polyphosphate, microcrystalline cellulose and melamine cyanurate microcapsules with high flame retardant efficiency were developed; The key preparation technology of flame retardant PLA masterbatch with good thermal stability and high content of flame retardant (more than 40%) was developed; The low temperature co blending technology of masterbatch and PLA was overcome to prepare PLA fiber with good flame retardant and mechanical properties.

　　 Project industrialization and Application

　　 The project has applied for 10 invention patents, including 2 authorized patents with independent intellectual property rights.

　　 The products of the project have been tested by the national quality supervision and Inspection Center for flame retardant materials and products and the national quality supervision and Inspection Center for textile products, showing excellent flame retardant and mechanical properties.

　　 3. Key technology and product application of high performance nanofiber membrane for protection

　　 ——Report by Zhang Lin, project leader of national advanced functional fiber Innovation Center

　　 Project achievement unit

　　 National advanced functional fiber innovation center, Jiangsu new horizon advanced functional fiber Innovation Center Co., Ltd., Beijing Research Institute of new materials and industrial technology, Beijing University of chemical technology, Dalian Ruiguang nonwovens Group Co., Ltd

　　 Project background

　　 With the acceleration of industrialization and the rapid development of urbanization, the areas affected by continuous haze weather are increasing in China. According to the investigation, high concentration of fine particles or aerosol pollution is the fundamental cause of haze. In addition to the outbreak and prevalence of "new coronavirus pneumonia (covid-19)" in China and other major countries and regions in the world, how to prepare efficient air filtration materials to protect human health and ensure the smooth progress of industrial production has become a major issue related to the international people's livelihood.

　　 In order to improve its own physical interception efficiency, the existing fiber air filter materials need to use electrostatic electret, but there are still some problems such as long-term performance, poor comfort and non recyclability. In recent years, studies have shown that the application of nanofibers in the diameter of nanofibers can bring larger specific surface area and significantly reduce the pore size of the materials, which is helpful to improve the filtration efficiency; Moreover, the nanofiber membrane has good air permeability and is more comfortable to wear under the same protective conditions; It has the advantage of non - static electricity and non - blocking service life. Nanofiber materials show potential applications in the field of personal protection, and nanofiber membranes are expected to become ideal filtration materials.

　　 Main innovations

　　 The project has studied the solution electrospinning and melt differential electrospinning technologies, and prepared high-performance multi-scale nano-scale microfiber filter materials with high filtration efficiency and low respiratory resistance, solvent-free, degradable and reusable characteristics, and developed high-performance protective masks and other products.

　　 Project industrialization and Application

　　 The project has applied for 4 invention patents, including one authorized and two utility model patents, forming one enterprise standard and possessing independent intellectual property rights.

　　 The project products have been applied in environmental sanitation workers, coal miners and other special types of work groups, and received good feedback, which reflects the concept of scientific and technological innovation oriented to people's life and health, and has a good social demonstration role.

　　 Enterprise production equipment, process and tooling, testing means, quality assurance system is complete, meet the production requirements.

　　 4. "High efficiency flexible preparation technology of polyamide 6"

　　 ——Report by Ji Peng, lecturer of Donghua University

　　 Project achievement unit

　　 National advanced functional fiber innovation center, Jiangsu new horizon advanced functional fiber Innovation Center Co., Ltd., Donghua University

　　 Project background

　　 China is the largest country in the production of polyamide fiber. In 2019, the output of polyamide fiber exceeds 4 million tons. However, the production of polyamide fiber still adopts two-step method, which seriously restricts the industrial upgrading and high-quality development.

　　 At present, the preparation of polyamide fiber is through polymerization, granulation, extraction, drying and then screw melting extrusion process, which not only consumes a lot of energy, but also can not achieve in-situ polymerization and copolymerization of polyamide. Therefore, through the innovation of polymerization process, reducing the content of oligomer and monomer, and realizing the direct spinning technology of polyamide melt from polymerization, melt transportation and spinning has become the strategic commanding point of the development of polyamide industry. In addition, despite the rapid development of polyamide fiber in recent years, the difference rate of polyamide fiber is more than 50%, but it is mainly concentrated in physical modification varieties such as fine denier, coarse denier and matting. The chemical modification and physical-chemical synergistic modification technology of high-end functional polyamide fiber need to be improved.

　　 At present, China's polyamide industry has established an independent and complete industrial chain industrial system. The overall scale of polyamide material industry has entered the ranks of the world's advanced technology level. The polyamide basic material field has formed the material industry system with the most complete categories and the largest scale in the world. However, there is a big gap in the research and development and production of high-end basic materials, Key high-end polyamide materials are far from self supply. Based on the study of the kinetics and mechanism of polyamide 6 hydrolysis polymerization, it is an important technical problem to develop a novel polyamide 6-based hydrolytic polymerization system, which can control the preparation of polyamide-6 copolymer and reduce the oligomer in the polymerization process, so as to get rid of the existing methods of polyamide copolymerization, esterification and amidation.

　　 Main innovations

　　 In the project, the micro modification of polyamide 6, low temperature ring opening and high performance liquid phase viscosity increasing technology were studied, which inhibited the formation of oligomer in the polymerization process, and significantly reduced the content of caprolactam monomer and oligomer; The end group modification and activation copolymerization technology of polyamide 6 oligomer was developed, which realized the high proportion copolymerization of modified components and inhibited the production of oligomers. The fiber grade copolymerized elastic polyamide 6, flame retardant polyamide 6 and cationic dyeable polyamide 6 were prepared, and the efficient flexible production of polyamide 6 fiber was realized.

　　 Project industrialization and Application

　　 The project has established a high-efficiency and flexible preparation test equipment for polyamide 6 polymerization spinning, and formed a technical scheme for the integration of polyamide 6 oligomer control and copolymerization modification. It provides a new idea and path for the technological innovation development and product development of polyamide 6 fiber industry, and promotes the high-quality development of chemical fiber industry.

　　 The project has been authorized 6 invention patents with independent intellectual property rights.

　　 In the end, Li Lingshen, vice president of China Textile Industry Federation, said that the four projects involved in the chemical fiber field, especially the key technological innovation in the development direction of differential fiber, green manufacturing and high-end application during the 14th Five Year Plan period, which is of great significance to the high-quality development and consumption upgrading of the whole chemical fiber industry. On behalf of the China Textile Federation, I would like to thank the science and Technology Department of Jiangsu Provincial Department of industry and information technology for its long-term support for textile science and technology, and congratulated the project undertaker on the phased achievements achieved. I hope that the project will further increase its later application and work with industry associations to jointly promote the market application and promotion of technology. 　　