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What Is The Common Point And Difference Between PTFE Tube And PFA Tube?
- Oct 09, 2018 -

      The essential difference between PFA tube and PTFE tube lies in the material they use. It is also very simple to distinguish the two kinds of plastic materials. From its appearance, the PFA tube is translucent and pure white opaque. In the shape of raw materials, PFA is granular PTFE is powder.


      Generally speaking, PFA is a little copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene, which is characterized by enhanced melt adhesion, lower viscosity of solution and no change in properties compared with polytetrafluoroethylene (PTFE). The resin can be manufactured directly by ordinary thermoplastic forming method, suitable for making corrosion-resistant parts, wear resistant parts, sealing parts, insulating parts and medical device parts, high temperature wire, cable insulation layer, anticorrosive equipment, sealing material, Pump valve bushing, and chemical containers.


      PFA has a long service temperature of -196-260 degrees, excellent chemical corrosion resistance, corrosion resistance to all chemicals, the lowest friction coefficient in plastics, and good electrical properties, its electrical insulation is not affected by temperature. Its chemical resistance is similar to polytetrafluoroethylene and is better than vinylidene fluoride.


     Moreover, the creep resistance and compression strength of PFA are better than that of PTFE, the tensile strength is higher and the elongation can reach 100-300. And the dielectric property is good, the radiation resistance is excellent, the flame retardancy is up to V _ 0, the PFA tube made by it also has the above excellent performance.


     PTFE is polytetrafluoroethylene, this material has acid resistance, alkali resistance, resistance to various organic solvents, almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, its friction coefficient is very low, so it can be lubricated, and has become an ideal coating for easy cleaning of inner layer of water pipe.


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Fluoropolymer PTFE fine powder.jpg