The biggest disadvantage of raw materials of PTFE filler: it is not easy to degrade. Because PTFE is excellent in various adverse environments such as acid and alkali resistant to oxidation reduction and high temperature resistance, it is one of the most chemically stable plastics, so PTFE waste is not good to deal with, resulting in more white pollution. Powerful. So this is its biggest drawback.
PTFE has high corrosion resistance to strong acids, strong alkalis, and strong oxidants. Even if the temperature is high, it will not work. Its corrosion resistance even exceeds that of glass, ceramics, stainless steel, and even gold and platinum. PTFE has a carbon atom as the skeleton. Fluorine atoms are distributed symmetrically and evenly around it, forming a tight barrier and giving it very valuable comprehensive physical and mechanical properties. PTFE is one of the fluorine plastics used for sealing. Except that some aromatic compounds can slightly swell PTFE, they have corrosion resistance to ketones, alcohols and other organic solvents. Only molten alkali metals and elemental fluorine can work at high temperatures.
If there are oil stains or dirt, you can use alkaline cleaners. If it is rust, chemical residues, you can use acid to clean. Chemical resistance and weather resistance In addition to the molten alkali metal, PTFE is hardly corroded by any chemical agents. PTFE does not absorb moisture, is not flammable, and is extremely stable against oxygen and ultraviolet rays, so it has excellent weather resistance. All types of PTFE products have played a pivotal role in the national economy such as chemical engineering, machinery, electronics, electrical appliances, military industry, aerospace, environmental protection, and bridges.