The difference between PTFE and PFA is that they have different properties, different temperature resistance and different applications.
One, different performance
1, PFA is a small amount of perfluoropropyl perfluorovinyl ether and PTFE **** polymer. Enhanced melt bonding, the viscosity of the solute decreases, while the performance of polytetrafluoroethylene compared to no change.
2, PTFE has a series of excellent performance: high-temperature resistance - long-term use of temperature 200 ~ 260 degrees, low-temperature resistance - still soft at -100 degrees; corrosion resistance - resistant to aqua regia and all organic solvents.
Second, different temperature resistance
1, PFA -200 degrees - +260 degrees
2, PTFE -200 degrees - +250 degrees.
Three, different uses
1, PTFE's unique properties make it in the chemical industry, petroleum, textiles, food, paper, medicine, electronics and machinery and other industries and marine operations have a wide range of applications.
2, PFA plastic for a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene **** polymer. Melt bonding enhancement, the viscosity of the solution decreases, and performance and PTFE compared to no change.
This resin can be directly processed into products by ordinary thermoplastic molding methods. It is suitable for the production of corrosion-resistant parts, wear-resistant parts, seals, insulation and medical equipment parts, high temperature wire, cable insulation, corrosion-resistant equipment, sealing materials, pumps, valves, bushings, and chemical containers.
PTFE applications:
1, used in the electrical industry, in aerospace, aviation, electronics, instrumentation, computers, and other industries used as power supply and signal line insulation, corrosion-resistant, abrasion-resistant materials can be made of thin film, tubes, plates and rods, bearings, gaskets, valves, and chemical piping, pipe fittings, equipment, container linings and so on.
2, used in electrical appliances, chemical, aviation, machinery and other fields instead of quartz glassware used in atomic energy, medicine, semiconductor and other industries of ultra-pure chemical analysis and storage of various acids, alkalis, organic solvents can be made into highly insulating electrical parts, high-frequency wire and cable wrapping, corrosion-resistant chemical utensils, cold-resistant oil pipeline, artificial organs and so on, can be used as a plastics, rubber, paints, inks, lubricating oil, It can be used as additives for plastics, rubber, paints, inks, lubricants, greases, etc.
3, this product is resistant to high temperature, corrosion, has excellent electrical insulation, aging resistance, small water absorption, self-lubricating performance is excellent, is a kind of general-purpose lubricating powder for a variety of media, can be quickly coated to form a dry film, in order to be used as graphite, molybdenum and other inorganic lubricants as a substitute. Suitable as a release agent for thermoplastic and thermoset polymers with excellent load bearing capacity. Widely used in the elastomer and rubber industries and in corrosion protection.
4, used as a filler for epoxy resin, to improve the abrasion resistance, heat resistance and corrosion resistance of epoxy adhesive.
5, mainly used as binder and filler for powder.
The above content reference Baidu Encyclopedia-Polytetrafluoroethylene, Baidu Encyclopedia-PFA