Analysis of the difference between PTFE, PFA, FEP, ETFE
Teflon is divided into PTFE, FEP, PFA, ETFE several basic types: • Teflon PTFE: PTFE (polytetrafluoroethylene) non-stick coating can be used continuously at 260 ℃, with a maximum operating temperature of 290-300 ℃, extremely Low coefficient of friction, good wear resistance and excellent chemical stability.
 • Teflon FEP: FEP (fluorinated ethylene propylene copolymer) non-stick coating melts and flows to form a non-porous film during baking. It has excellent chemical stability and excellent non-stick characteristics. The maximum use temperature is 200 ℃.
• Teflon PFA: PFA (perfluoroalkyl compound) non-stick coating, like FEP, melts and flows during baking to form a non-porous film. The advantage of PFA is that it has a higher continuous use temperature of 260°C, stronger stiffness and toughness, and is particularly suitable for use in anti-sticking and chemical resistance applications under high temperature conditions.
•Teflon ETFE: ETFE is a copolymer of ethylene and tetrafluoroethylene. The resin is the toughest fluoropolymer. It can form a highly durable coating with excellent chemical resistance. Work continuously at ℃. After Teflon coating, it has the following characteristics: Oven sheet 1. Non-stickiness: Almost all substances do not adhere to the Teflon film. Very thin films also show good non-stick properties. 2. Heat resistance: Teflon coating film has excellent heat resistance and low temperature resistance. It can withstand high temperature to 300°C in a short time, and generally can be used continuously between 240°C and 260°C. It has significant thermal stability. It can work at freezing temperature without embrittlement and does not melt at high temperature. 3. Sliding property: Teflon coating film has a low friction coefficient. The friction coefficient changes when the load is sliding, but the value is only between 0.05-0.15. 4. Moisture resistance: The surface of the Teflon coating film does not stick to water and oil, and it is not easy to stick to the solution during production operations. If there is a small amount of dirt, simply wipe it off. Short downtime, saving working hours and improving work efficiency. 5. Wear resistance: It has excellent wear resistance under high load. Under a certain load, it has the dual advantages of wear resistance and non-sticking. 6. Corrosion resistance: Teflon is hardly corroded by chemicals, and can protect parts from any kind of chemical corrosion.
 Teflon is widely used in industries requiring high temperature resistance and high viscosity. The spraying of Teflon should be sprayed or dipped. There are basically no at room temperature, and there is a minimum of 180 degrees sintering, but it is only used for wear resistance and cannot be used for anti-sticking. No aging, no sticking, and no load It can be used at -180℃—+260℃, and it has the lowest coefficient of friction among known solid materials. Whether the paint is water-based or oil-based, the thinners to be used are very different. Common problems: Improper surface treatment, inadequate degreasing and adjustment of the pretreatment process. There is water and oil in the compressed air. Use an oil-water separator to remove oil and water. Recycling system or replacement of new powder workpieces have pores and debris on the working surface for surface treatment. The spray gun is too close to the workpiece, the spray gun is of poor quality, and there is no automatic electrostatic adjustment function. Application method: Spraying is a coating method in which spray gun or dish atomizer is used to disperse into uniform and fine droplets by means of pressure or centrifugal force and apply to the surface of the object to be coated. It can be divided into air spraying, airless spraying, electrostatic spraying and various derivative methods of the above basic spraying forms, such as large flow and low pressure atomized spraying, thermal spraying, automatic spraying, multi-group spraying, etc.