The mechanical properties of polytetrafluoroethylene are relatively soft. It has a very low surface energy.

Polytetrafluoroethylene (F4,PTFE) has a series of excellent performance: high temperature resistance-long-term use temperature 200~260 degrees, low temperature resistance-still soft at -100 degrees; Corrosion resistance-can withstand aqua regia and all organic solvents; Weather resistance-the best aging life in plastics; High lubrication-has the smallest friction coefficient (0.04) in plastics; Non-stickiness-has the smallest surface tension in solid materials without adhering to any substances; non-toxic-physiologically inert; Excellent electrical performance, is an ideal C- class insulation material, a thick layer of newspaper can block 1500V high voltage; Smooth than ice. PTFE material, widely used in national defense, atomic energy, petroleum, radio, electrical machinery, chemical industry and other important sectors. Products: PTFE ethylene bar, pipe material, plate, turning plate. Polytetrafluoroethylene is a polymer of tetrafluoroethylene. The English abbreviation is PTFE. The structural formula is: CF3(CF2CF2)nCF3. It was discovered in the late 1930 s and put into industrial production in the 1940 s. The relative molecular mass of PTFE is relatively large, with hundreds of thousands of low and more than 10 million high.

While the breaking of carbon-carbon and carbon-fluorine bonds in perfluorocarbons requires absorption energies of 346.94 and 484.88kJ/mol, respectively, the depolymerization of polytetrafluoroethylene to produce 1mol of tetrafluoroethylene requires only 171.38kJ of energy. Therefore, during high temperature cracking, polytetrafluoroethylene is mainly depolymerized to tetrafluoroethylene. The weight loss rates (%) of PTFE at 260, 370 and 420°C were 1 x 10-4.4 x 10-3 and 9 x 10-2 per hour, respectively. It can be seen that PTFE can be used for a long time at 260 ℃. Since highly toxic by-products such as fluorine phosgene and perfluoroisobutylene are also produced during high-temperature cracking, special attention should be paid to safety protection and to prevent PTFE from contacting open flames.