... made of quality flake graphite,the expansion, repression, and other technology is made resistant to high temperature, ... corrosion resistance,aging,self-lubricating, compressibility,elasticity,and other fine sealing performance,the flexible graphite mat film ... (MPa)≥4.8≥4.5Compression ratio (%)≥40≥40Spring rate (%)≥20≥15Sulfur content (ppm)40-900<1500Fluoride content (ppm)<25<30Stress ...