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Corrosion-resistant materials—Introduction to F materials

2009-02-04View Original

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Our equipment is often lined with F, F plastic pumps. Here is a brief introduction to fluoroplastics. Fluoroplastics is a general term for various fluorine-containing plastics. It is made from fluorine-containing monomers such as tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, vinylidene fluoride, vinyl fluoride, hexafluoroisobutylene, perfluoroalkyl vinyl ether and ethylene through homopolymerization or copolymerization. The main types of fluoroplastics are listed below, but in terms of quantity and use, polytetrafluoroethylene is the most important. Polytetrafluoroethylene (PTFE, referred to as F4) Polyperfluoroethylene propylene (FEP, referred to as F46) Polychlorotrifluoroethylene (ECTFE, referred to as F3) Polyvinylidene fluoride (PVDF, referred to as F2) Polyvinylidene fluoride (PVF, referred to as F1) Copolymer of vinylidene fluoride and chlorotrifluoroethylene (Kel-F, referred to as F2 3) Copolymer of vinylidene fluoride and tetrafluoroethylene (фOomph, referred to as F2) 4) Copolymer of vinylidene fluoride and hexafluoropropylene (vitonA, referred to as F2 6) Copolymer of chlorotrifluoroethylene and ethylene (Halar, referred to as F3 0) Copolymer of tetrafluoroethylene and ethylene (Tefzel, referred to as F4 0) Copolymer of vinylidene fluoride and hexafluoroisobutylene (CM-1) Copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether - fusible polytetrafluoroethylene (PEA) Fluoroplastics represented by F4 have a series of excellent usage characteristics and can withstand high temperatures for long-term use up to 200°C.℃ ; Resistant to low temperatures and still soft below -100°C, corrosion-resistant and resistant to aqua regia and cutting organic solvents ; Weather resistant and has the best aging life among plastics ; High insulation volume resistance reaches 1018 Ohm·cm, and the dielectric properties are almost independent of changes in temperature and frequency. ; High lubrication has the smallest coefficient of static friction among plastics ; Does not adhere to anything. Has the smallest surface tension among solid materials and does not adhere to anything. ; Non-toxic, physiologically inert, suitable for contact with blood. Because fluoroplastics have all the above practical properties, they can be used in many fields of the national economy. Such as linings and coatings on chemical anti-corrosion pipelines and equipment, ultra-pure substance passing materials, high and low temperature resistant hydraulic transfer hoses, sealing gaskets resistant to various harsh environments, low friction bridge telescopic sliders, various oil-free lubricated piston rings, insulation of high temperature and high frequency electronic instruments, flexible cables, advanced printed circuit boards, voltage and voltage thermal performance materials, release coatings for oil-free cooking and drinking utensils, substitutes for human blood vessels and heart and lung organs, etc. are just its representative uses in these fields. It is absolutely believed that with the advancement of processing technology, more fluoroplastic products will be used in various sectors of various industries.

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