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This Composite Spinning Technology Makes PTFE Sewing Thread Even Better And Helps The Bag Dust Removal Industry To Develop With Higher Quality

2023/12/12 12:21:00 13

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　　 On November 16, 2023, the China Textile Industry Federation organized the appraisal meeting of the project "Development and Application of Self closing Needle Hole PTFE Composite Sewing Thread for Dust Removal Filter Bag" jointly completed by Suzhou Naide New Material Technology Co., Ltd., Guangzhou Inspection and Testing Certification Group Co., Ltd., Northeast University and other units in Yancheng City, Jiangsu Province, The appraisal committee believes that the project achievements have reached the international advanced level. The research results of the project are briefly introduced as follows:

　　 1、 Project research background

　　 At present, China has become the largest country of origin of fluoropolymer materials and their products. With the localization of raw material supply and the development of environmental protection industry, the PTFE fiber material with great application value for bag filter technology has developed rapidly. PTFE sewing thread is the preferred material for high-temperature dust removal filter bag. China has become the largest producer and exporter of PTFE sewing thread. According to statistics, there are more than 1500 tons of dust removal filter bag lines in the world alone, and China's products account for more than 90% of the global market supply. At present, there are only a few PTFE sewing threads for filter bags produced by GORE, Len zing, and YMT in Taiwan.

　　 The defects of PTFE sewing thread in the application of bag type dust removal technology will cause the failure of the filter bag. The material has excellent chemical resistance and temperature resistance, but there are also defects in the physical properties such as thermal creep, non abrasion resistance, low friction coefficient, etc., resulting in the bags sewed with pure PTFE sewing thread falling due to thermal creep, and the suture breaking, Serious quality problems such as wear and fracture that make the filter bag invalid. The project starts with improving the performance defects of sewing thread, and makes composite sewing thread through spinning composite technology, so that the materials can learn from each other in terms of performance and give better play to their respective performance advantages. The project product finally realizes the purpose of improving the dust removal effect of the filter bag (improving the filtering efficiency), extending the service life of the filter bag, reducing the user's production cost, and improving the production efficiency. On the technical level, the project adopts composite spinning technology to strengthen the mechanical properties of products such as wear resistance, and innovatively improve the mechanical structure of sewing thread, aiming at the performance defects of materials, which is a breakthrough in the application technology of PTFE fiber materials in composite materials.

　　 The project researches and develops the "pinhole self closing PTFE composite sewing line" suitable for the dust removal filter bag, which makes positive contributions to plugging pinhole penetration, improving the dust removal effect of the dust removal filter bag, extending the service life of the dust removal filter bag, reducing the production cost of the enterprise's filter bag, and improving the production efficiency, so as to promote the high-quality development of the bag dust removal industry.

　　 2、 Main innovation points of the project

　　 The project has researched and developed PTFE monofilament as the main raw material, and has realized the direct doubling, twice doubling, cladding doubling and other composite technologies with modified PPS, meta aramid, POD, PI and other high-performance fiber yarns; A sewing thread oiling device for improving oil content and adhesion is invented; The prepared "needle hole self closing PTFE composite sewing thread" solves the problems of pure PTFE sewing thread such as smooth surface (low friction coefficient), poor holding fastness, needle hole ash leakage, improves the thermal creep resistance and wear resistance, and improves the performance of PTFE filter bag sewing thread.

　　 3、 Project industrialization and application

　　 The project has built a production line of needle hole self closing PTFE composite sewing line, realizing industrialization. The project products have been used in the dust removal filter bags in the treatment of high-temperature and highly corrosive flue gas in power, waste incineration, cement, steel smelting and other industries, improving the dust removal efficiency of the filter bags, extending the service life of the filter bags, and achieving long-term stable ultra-low emissions of particulate matter, It has good economic and social benefits.

　　 4、 Brief introduction of project completion unit

　　 Suzhou Naide New Material Technology Co., Ltd. is an entity enterprise integrating the research, development, production and sales of fluorinated new materials. The company was founded in 2015 with a registered capital of 3 million yuan. The company is registered and operated in Xinlian Advanced Manufacturing Industrial Park, Daxin Town, Zhangjiagang City. At present, the company has 36 employees. At present, it is mainly engaged in the research, development, production and sales of polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) filaments (monofilament, multifilament) and their derivatives sewing lines, woven fabrics, filter screens, etc. in the fields of environmental filtering, medical equipment, etc. The company is a member of China Environmental Protection Industry Association, China Industrial Textiles Association, a private high-tech enterprise in Jiangsu Province, and a national high-tech enterprise; The enterprise holds 20 authorized invention, utility model and design patents, including 4 authorized invention patents; The enterprise has passed the ISO 14001-2015 environmental management system certification; Holding "NETTtex ?” The international registered trademark of the product and "Ned" ?”、 "Buchuk ?”、 “BLOCK ?” Domestic registered trademark of such subdivided products; The enterprise took the lead in formulating the standard of China Industrial Textile Industry Association (group standard) of Teflon Sewing Thread for Filter Bag (T/CNITA 0510-2018), which was rated as the demonstration project of group standard in 2021 by the Ministry of Industry and Information Technology; Enterprises participated in the formulation of the textile industry standard FZ/T 64066-2017 Polytetrafluoroethylene Materials for Coal fired Boiler Filtration, and the Environmental Protection Industry Association T/CAEPI 33-2021 Technical Requirements for Bag Filter Bags (group standard). Chen Minggang, the founder of the enterprise, is one of the early personnel engaged in the research and development technology of polytetrafluoroethylene fiber and filter material in China. He has participated in a number of patent inventions of polytetrafluoroethylene long and short fibers, membrane materials and their derivatives. He has accumulated many years of technical exploration and production practice in professional fields, and has profound understanding and clear development ideas for the production and application of fluoropolymer materials.

　　 Guangzhou Inspection, Testing and Certification Group Co., Ltd. is the only municipal state-owned enterprise in Guangzhou whose main business is inspection, testing and certification. It was founded in September 2016, put into trial operation in 2017, and officially put into operation in 2018. The State owned Assets Supervision and Administration Commission of Guangzhou Municipality performs the responsibility of investor and entrusts Guangzhou Municipal Market Supervision and Administration Bureau with supervision.

　　 Guangjian Group is mainly engaged in quality inspection and certification, capability verification, standard training, laboratory services and market management services in textile light industry, food chemical industry, ecological environment, construction engineering, etc. It has the National Quality Inspection and Testing Center for Textiles, Clothing and Apparel Products (Guangzhou), National Quality Inspection and Testing Center for Leather Products (Guangdong) National quality inspection centers, such as the National Quality Inspection and Testing Center for Processed Food (Guangdong), have detection capabilities covering more than 50 fields and more than 9000 standards. They are comprehensive high-tech enterprises integrating inspection and testing, certification, scientific research, standardization, consulting and training and other technical services. The inspection and testing capabilities and technical service quality of food, textiles The field of leather products and clothing products is in the leading domestic and international level. At present, the Group has more than 1800 employees, 30% of whom have medium or senior professional titles. At present, it has seven wholly-owned secondary companies, including Guangfang, Guangzhi, Guangke, Guangjian, Jianguan, Shanghai and Wuhan, as well as branches in Beijing, Jiangxi, Hainan, Xi'an and Hangzhou, to build a detection service network covering the main regions of the country in the east, west, north, south and north.

　　 The Textile, Clothing and Apparel Inspection Research Institute of Guangzhou Inspection Group is a comprehensive backbone research institute of Guangzhou Inspection Group devoted to the inspection and detection of high-tech service industry. At present, it has formed the core of quality and technical services for textile and clothing products, footwear bags, leather products, down products, stationery toys, glasses products, light products, sanitary products, protective products, medical devices and other products, A diversified technology industry integrating scientific research and technical consultation.

　　 Guangjian Group is the supporting unit of China Industrial Textile Industry Testing Center (Guangdong), the first comprehensive service platform for industrial textile quality and technology in China. The Group serves related industries with profound technology accumulation and strong technological innovation ability, and has been awarded the "Leader" standard outstanding contribution assessment agency for two consecutive years, Won the "13th Five Year Plan" Excellent Public Service Platform for China's Industrial Textile Industry "," Scientific and Technological Innovation Contribution Award for Industrial Textile Industry "," 2020 National Advanced Unit for the Prevention and Control of COVID-19 Epidemic in Textile Industry "," 2020 Guangzhou Advanced Group for the Fight against COVID-19 Epidemic ", etc.

　　 China Industrial Textiles Industry Testing Center (Guangdong) is deeply engaged in the field of inspection, testing and certification of industrial textiles and related products, providing value-added services such as quality and big data analysis, quality traceability, certification, laboratory information services, one-stop construction of laboratories and other services for related industries and enterprises, enabling manufacturing enterprises to help enterprises transform, upgrade and develop in high quality.

　　 Northeastern University has a 70 year history of research and development of dust removal and filter materials. It has accumulated rich experience in research work over the years, formed a research team that combines the old, the middle and the light. It has presided over and participated in the national science and technology breakthrough, national science and technology support plan, national 863 high-tech plan, and 22 national key research and development plans in the field of dust removal and filter materials from the 6th to the 14th five-year plan, It has won more than 15 provincial and ministerial level scientific and technological achievements and awards, more than 30 patents, drafted more than 20 national standards, industrial standards and ISO international standards related to filter materials, more than 300 papers, and more than 100 masters and doctors. It has developed 2 categories and 8 series of multi variety filter materials, which are produced by dozens of manufacturers, with an annual output value of more than 3 billion yuan.

　　 Northeast University Filter Material Testing Center is the only authorized filter material product certification and testing organization in the national environmental protection industry, with CMA measurement certification qualification, and has more than 5000 customers in various industries at home and abroad, including DuPont, 3M, Leder, Andrew, Germany, Bidafu, Gorge, Japan Daikin Chemical Teijin Advanced Fiber Co., Ltd., Australia Auberny Filter Media Co., Ltd. and other internationally renowned companies, most of the filter media production enterprises in China, including five major power companies including Guodian, Huaneng, Datang, Huadian, and CPI, as well as coal-fired power plant industries such as Shenhua and China Coal, steel industries such as Ansteel, Shougang, Wuhan Iron and Steel, Minmetals, Conch, China Resources, Jidong Lafarge and other cement industries, nonferrous metal smelting, waste incineration and other heavy pollution industries have high prestige in the industry, and have also accumulated a large number of test data and technical data.

　　 Relying on Northeast University, Liaoning High tech Filter Material Engineering Center is the only engineering center in the field of filter materials in China, with strong capabilities in product research and development, new product promotion, and engineering application.