The filter plate of Sudong filter press is a comprehensive design that integrates different separation media and treatment conditions. It also has special formulas, flow channels, structures, and specifications for industry applications. The polypropylene diaphragm filter plate is composed of two diaphragms and a core plate combined by high-temperature heat sealing. An extrusion chamber (hollow) is formed between the membrane and the core plate, and external media (such as water or compressed air) is introduced into the chamber between the core plate and the membrane, causing the membrane to expand and compress the filter cake in the filter chamber, achieving secondary extrusion dehydration of the filter cake. The membrane is modified with high-quality TPE elastomer to provide high strength, high resilience, and high-temperature and high-pressure resistance; The working filtration pressure can reach 1.2MPa, and the pressing pressure can reach 2.5MPa. The filter plate adopts a special flow channel design, which increases the filtration speed by about 20% and reduces the moisture content of the filter cake. The polypropylene filter plate is reinforced and modified with TPE elastomer and alkali free glass fiber polypropylene material, making the filter plate have strong toughness and rigidity, improving the compression sealing performance and corrosion resistance of the filter plate; The temperature resistance can reach 150 ° C and the pressure resistance can reach 2.0MPa; The filter plate adopts a special flow channel design, with fast filtration speed, achieving fast water flow and improving the service life of the filter plate. Among them, graphite modified reinforced polypropylene composite material and filter plate have obtained two national invention patents.