Special report on high performance fibers at the h

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Recently, the High Tech Department of the Ministry of science and technology organized a seminar on the development strategy of high-performance fibers and their composites in Beijing. Members of the expert group in the field of new material technology and more than 30 experts from relevant enterprises, universities and research institutes attended the meeting. Relevant comrades from the high tech department and the high tech center attended the meeting

at the seminar, experts from the main application departments and Beijing University of chemical technology, Yantai spandex company and other units made special reports on the overall situation of high-performance fibers, the research and development progress of high-performance PAN carbon fibers, the engineering progress of aramid I and aramid II fibers, and the technical and industrial development of UHMWPE equipment manufacturing

the experts participated in the exchange and Discussion on the development direction of high-performance fibers and their composites, and put forward valuable opinions and suggestions on how to promote the development of composite technology and industry in China, strengthen the development and industrialized application

high performance fibers

high performance fibers are chemical fibers with special physical and chemical structures, properties and uses, or with special functions

such as strong corrosion resistance, low wear, high temperature resistance, radiation resistance, fire resistance, high voltage resistance, high strength and high modulus, high elasticity, reverse osmosis, efficient filtration, adsorption, ion exchange, light guide, conductivity and various medical functions. Most of these fibers are used in industry, national defense, medical treatment, environmental protection and cutting-edge science

high performance fibers in the South China branch of the "National Engineering Research Center for engineering plastics" built in Changping Town can be divided into corrosion-resistant fibers, high-temperature resistant fibers, fire-resistant fibers, high-strength and high modulus fibers, functional fibers and elastomer fibers according to their properties

① corrosion resistant fiber: that is, fluorine-containing fiber. There are polytetrafluoroethylene fiber (Teflon TFE), tetrafluoroethylene hexafluoropropylene copolymer fiber (teflonfep), polyvinylidene chloride fiber (Kynar), ethylene chlorotrifluoroethylene copolymer fiber (Halar), etc

② high temperature resistant fiber: there are polyisophthalide isophthalide fiber (no MEX) and polyimide fiber( Αримид ∏ Μ)、 Polyphenylsulfonamide fiber( СульФон-Τ)、 Polyamide imide fiber (kermel), poly 7: benzimidazole fiber (PBI) after sample cracking, etc

③ fire resistant fiber: phenolic fiber (kynol), aromatic polyamide surface chemical treated fiber, metal chelating fiber, polyacrylonitrile preoxidation fiber (pyromex), etc

④ high strength. In addition, the material of this part is high modulus fiber with metallicity: Kevlar fiber, aromatic polyamide copolymer fiber (hm-50), heterocyclic polyamide fiber( Βниивлон СΒΜ)、 Components or devices that convert carbon fiber (carbon) into corresponding output signals according to a certain law n fiber: torayca), graphite fiber (M40), silicon carbide fiber, etc

⑤ functional fibers: hollow fiber semi permeable membrane (B-9, B-10, prism, etc.), activated carbon fiber (KF, etc.), microfiber felt( Ф Π 15, etc.), oil absorbing fiber felt (tafnel, etc.), optical fiber (crofon, ESKA, etc.), conductive fiber (Antron Ⅲ), etc

⑥ elastomer fibers: polyester and polyether polyurethane fibers (spandex), polyacrylate fibers (anidex), polybutylene terephthalate fibers (fiber-l), etc

most high-performance special fibers are made by wet spinning. Some fiber preparation processes are difficult, such as spinning linear or low molecular weight fibers with traditional spinning technology, and then cyclization, crosslinking, metal chelation, high temperature heat treatment, surface physicochemical treatment or plasma treatment can be carried out to prepare finished fibers; Others need to adopt new spinning processes such as lotion spinning, reaction spinning, liquid crystal spinning, dry jet wet spinning, phase separation spinning, high-voltage electrostatic spinning, high-speed air flow melt jet and special composite spinning technology; Some use existing synthetic fibers to obtain various ion exchange groups or convert them into fibers through functional group reaction

the research and production of high-performance fibers began in the 1950s, and fluorine-containing fibers were first put into industrial production. With the development of aerospace and national defense industry, various aromatic heterocyclic organic high temperature resistant fibers, such as poly (m-phthaloyl-m-phenylenediamine) fibers, and inorganic high-strength and high modulus fibers such as carbon fibers and boron fibers appeared in the 1960s; Later, organic fire-resistant fibers such as phenolic fibers were developed. In the 1970s, due to the needs of environmental protection and energy conservation, high-strength and high modulus fibers and various functional fibers were widely used

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