Fluoroelastomers (FPMs) are organic elastomers formed by the copolymerization of fluorine-containing monomers. Its characteristics are temperature resistance up to 300 °C, acid and alkali resistance, oil resistance is the best among oil-resistant rubber, radiation resistance, high vacuum resistance; Excellent electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, and atmospheric aging resistance. The disadvantages are poor processability, high price, poor cold resistance, and low elastic air permeability. Operating temperature range: -20°C~+200°C. It is mainly used in the defense industry to manufacture vacuum-resistant, high-temperature, chemical-resistant sealing materials, hoses or other parts on aircraft and rockets, and in the automotive industry.