I believe many people do not know, what are the advantages and properties of PTFE products.
Today, I will introduce ten advantages and properties of PTFE products:
1. The friction coefficient of self-lubricating PTFE is smaller than that of other engineering plastics, and it is the lowest friction coefficient among known practical sliding surface materials and is an ideal lubricating material;
2. Chemical resistance Due to the absence of double bonds and branched chains and high crystallinity in the molecular structure of PTFE, it has excellent chemical resistance and is the best-known engineering plastic. Even in a high-temperature environment, it has no effect with concentrated acid, dilute acid, concentrated alkali, and strong oxidant, is not eroded even when boiled in aqua regia, and has no effect with most solvents, such as alcohols, ethers, ketones, etc.;
3. The water absorption rate of water-absorbing PTFE is very low, which is equivalent to UI-MWPE, and does not swell in water;
4. Wide range of high and low-temperature use: PTFE can be used continuously for a long time in the range of -200-260 °C, and it is not brittle even at the ultra-low temperature of -200 °C and can maintain certain flexibility;
5. Non-stick polytetrafluoroethylene is a solid material with the smallest surface energy at present, and the surface tension is only 0.019N/m, and almost all solid materials cannot adhere to its surface;
6. Pure PTFE with wear resistance is extremely wear-resistant, but adding various fillers to PTFE can dramatically improve the wear resistance, which is better than some materials commonly used as friction parts (such as cast iron and copper). also wear-resistant;
7. Hygienic and non-toxic PTFE board is hygienic and non-toxic, in line with hygienic standards, and can be in contact with food and medicine;
8. Excellent electrical insulation performance PTFE is a highly non-polar material with excellent dielectric properties. Its breakdown voltage is 25-40KV/mm; 1061
9. The melting point of completely non-flammable polytetrafluoroethylene is 327℃, which is higher than that of other general polymers. At 260°C, its breaking strength still maintains 5MPa (about 1/5 of room temperature), and its yield strength reaches 1.4MPa. It has extremely valuable incombustibility, its oxygen limit index (L02) is above 95, it can only be melted on the flame, no droplets are formed, and it is only carbonized in the end;
10. Excellent aging resistance and radiation resistance PTFE is not only dimensionally stable at low temperature and high temperature, but also has the same performance in harsh environments, is not attacked by microorganisms in wet conditions, and it has high resistance to various ray radiations. protection capability.