In people's impression, graphite is a brittle substance, lacking elasticity and toughness, but the specially treated graphite is soft in texture and good in elasticity. In this way, the heat resistance and chemical stability of graphite can be displayed in the gasket material; and the gasket has a small pressing force and excellent sealing effect. This graphite can also be made into belts, which can be combined with metal belts to form wound washers with excellent performance. The appearance of graphite plate sealing ring and graphite-metal wound gasket is a major breakthrough in high-temperature corrosion-resistant sealing. Such gaskets have been produced and used in large quantities abroad.