The essential difference between PFA pipe and PTFE pipe still depends on their common raw materials. It is also very simple to distinguish the two plastic materials. From its appearance, PFA is transparent, while PTFE is white and not completely transparent; In the raw material appearance, PFA is in granular form and PTFE is in powder form.
To sum up, PFA plastic consists of small amount of perfluoropropyl perfluorovinyl ether and teflon The characteristics of the polymer are that the melting adhesion is improved, the melt viscosity is reduced, and the teflon There is no change in contrast. This kind of epoxy resin can be produced and processed into products immediately using the general thermosetting plastic forming method, and is suitable for making anti-corrosion parts, wear reducing and wear-resistant materials, hydraulic seals, insulating layers and medical machinery parts, high-temperature cables, cable sheaths, anti-corrosion materials Rubber seals , valve fitting sleeve, and organic chemical utensils.
The long-term application temperature of PFA is - 196 - 260 degrees, which has good resistance to solvent corrosion, corrosion resistance to all chemicals, and friction resistance in plastic is less; In addition, it also has very good electrical performance, its dielectric strength is not affected by temperature, and its chemical resistance is teflon Similar, better than vinylidene fluoride butadiene.
Also, PFA has better stress relaxation resistance and reduced compressive strength than polytetrafluoroethylene, with high tensile strength and elongation of 100-300%. The dielectric charge is good, and the radiation source resistance is excellent; The flame-retardant grade reaches V0, and the PFA tube made of it has the same good characteristics as described.
PTFE is teflon This kind of raw material has the characteristics of acid suppression and alkali resistance primer, resistance to various solvents, and almost does not dissolve all organic solvents. In addition, polytetrafluoroethylene has the characteristics of heat resistance, and its friction resistance is extremely low, so it can be used as a moisturizing effect for leisure, and it has become an ideal architectural coating that is easy to clean the inner layer of the water pipe.
After practical experience, PTFE can resist air embrittlement; Irradiance resistance and low water permeability; Long term exposure to the air will not change the surface layer and property maintenance. In addition, it is resistant to acidity and alkalinity, so it does not dissolve strong bases, strong acids and solvents. The characteristics of plastic pipes made of such raw materials should not be poor. After all, the raw materials have the same characteristics.
