Polytetrafluoroethylene (abbreviated as Teflon or [PTFE, F4]), commonly known as “Plastic King”, Chinese trade names “Teflon”, “Teflon” (teflon), “Teflon”, “Teflon” “, “Teflon” and so on.
Brief description: It is a polymer compound formed by polymerization of tetrafluoroethylene. Its structural formula is -[-CF2-CF2-]n-. It has excellent chemical stability and corrosion resistance (the most One of the best materials for corrosion performance, except molten metal sodium and liquid fluorine, it is resistant to all other chemicals, and it does not change when boiled in aqua regia. High lubricating non-stick properties, electrical insulating properties and good aging resistance.
Appearance: PTFE white waxy, translucent
Physical properties: Its friction coefficient is extremely low, so it can be used for lubrication
Chemical properties: excellent heat and cold resistance, can be used for a long time at -180 ~ 260ºC
Application example 1: PTFE gasket
Application example 2: Non-stick pan coating.
Teflon coating (Teflon and PTFE are the same substance), using the characteristics of high temperature resistance and lubrication of PTFE. The non-stick coating in the general sense refers to Teflon powder apar (PTFE, polytetrafluoroethylene), which has the best hydrophobicity. It can be understood as a kind of plastic, which is stable below 260 degrees Celsius, and the frying temperature is generally 100-230 degrees Celsius. When the oil temperature is about 100 degrees, white bubbles appear on the oil surface, and there is no sound or blue smoke. The oil temperature is about 150 degrees, the oil surface is turned over, and there is a slight blue smoke, which is suitable for soft frying. The oil temperature is about 200 degrees, the turning of the oil surface is calm, and the green smoke is everywhere, which can be suitable for frying. The oil temperature is about to burn at around 257 degrees, which is only suitable for fried vegetables. . Therefore, it is safe and non-toxic as long as it does not burn the bottom of the pot, and there is no problem with eating the peeled coating.
Application example 3: 3D printer feeding tube.
Teflon feed tube will not bond to molten plastic; high temperature resistance. It can be at a working temperature of 260 °C for a long time. The temperature is generally 200 °C when 3D printing PLA, and 230 °C when printing ABS materials. The friction coefficient is small, and the fluidity of raw materials is good.
Application example 4: inner tube of transmission line, inner tube of brake line.
The transmission wire transmission inner tube similar to the 3D printing feeding tube also adopts Teflon tube, which is a three-layer structure. The Teflon inner tube is covered with a steel tube, and the Teflon tube mainly reduces friction. The outermost protective tube is made of PVC.
Application example 5: Teflon high temperature resistant tape.
Application example 6: plastic guide rail.
The plastic-coated guide rail is super wear-resistant, and its life is about 8 times that of the traditional cast iron guide rail pair. Moreover, the hardness of the composite PTFE guide rail material is lower than that of the metal, and its wear is mainly on the composite PTFE material. Therefore, it can effectively avoid the occurrence of concave in the guide rail of the bed, and ensure the accuracy of the guide rail of the machine tool for a long time. The dynamic and static friction coefficients are similar, and the test is conducted within the speed of 0.002-75m/min. The operation is stable and uniform, without crawling and shaking. It can fully meet the requirements of inching feed positioning of CNC machine tools. Excellent friction and wear characteristics and good shock absorption and damping properties improve the machining accuracy of machine tools.
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