Domestic film-splitting PTFE fiber technology breaks international monopoly
The research on industrial production technology and application of membrane-splitting polytetrafluoroethylene (polytetrafluoroethylene) fiber” project is sponsored by Shanghai Jinyou Fluorine Materials Co., Ltd., Shanghai Lingqiao Environmental Protection Equipment Factory Co., Ltd. and the General Logistics Department of the Chinese People’s Liberation Army It was jointly completed by the Military Equipment Research Institute. On September 27, the China Textile Industry Association organized a strong expert appraisal committee in Shanghai to “carry out technical achievement appraisal of this technology.”
Academician Sun Jinliang, director of the appraisal committee, deputy directors Jiang Shicheng, academician Zhang Yaoming, and 11 experts from the fields of chemical fiber materials, industrial fabrics, environmental protection, chemical industry and other fields believe that. This project created a PTFE uniform station finishing membrane production technology. Through multiple mixing of PTFE resin, multi-step pressurization, multi-channel stretching and other finishing steps, it solved the problem of micropore manipulation and control during the membrane production process. Technical problems such as uneven thickness; the creation of multiple production technologies such as temperature gradient controlled non-isovelocity, variable effective width, multi-pass stretching, film splitting and fiber splitting have improved the strength and strength of polytetrafluoroethylene fibers produced by the film splitting method. Linear density uniformity; hot-pressed and bonded with expanded polytetrafluoroethylene (e-PTFE) membrane to develop a series of high-performance filter materials.
This project is a major integrated innovation in my country’s high-performance fiber finishing technology, production equipment, product development and other aspects. It has a demonstration effect and the overall technology has reached the international advanced level. The independently developed and innovative integrated production equipment for polytetrafluoroethylene membranes and fibers operates stably and has a thousand-ton production capacity. This achievement has independent intellectual property rights. It has applied for 10 invention patents and been authorized for 4. It has significant social and economic benefits and broad market prospects.
Ye Yongmao, senior engineer of the China Chemical Fiber Industry Association, pointed out that the National Development and Reform Commission clearly listed the development and production of polytetrafluoroethylene fibers and products as one of the priorities in the “Guidance Catalog for Industrial Structural Adjustment”. In the first year of the “Twelfth Five-Year Plan”, it is really exciting to see the fruitful results of the serialization of project units. As a skeleton material with excellent performance, the mass production of polytetrafluoroethylene fiber can promote the application of high-performance fibers such as Nomex1313, arylsulfone fiber, and polyphenylene sulfide fiber in filter materials, and can accelerate the transformation of the economic progress of China’s chemical fiber industry. In this way, we will promote the adjustment and upgrading of the chemical fiber industry structure and improve and develop the modern industrial system.
According to reports, the currently mass-produced polytetrafluoroethylene fiber series products are resistant to high temperatures, strong acid and alkali corrosion, and stable performance under harsh conditions. They have been successfully used in waste incineration, coal-fired power plants, steel, cement and other fields. Use it and get good results. The quality of its products is completely comparable to similar products in developed countries, and some of its performances even exceed those of foreign products, while the price is only 1/3 of foreign products. Some products have been exported to developed countries in Europe and the United States.
Fang Aimin, director of the Dust and Ash Removal Research Institute of the Guodian Environmental Protection Research Institute, said that the major breakthrough in domestic polytetrafluoroethylene fiber production technology has successfully broken the foreign product monopoly and technological blockade of our country for many years, which will trigger environmental protection The upgrading of processes and materials is of great social significance and economic benefit at the critical stage of the country’s promotion of the “Blue Sky Project” during the “Twelfth Five-Year Plan”.
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