PPS bags are high-performance dust filter bags made primarily from polyphenylene sulfide (PPS) fibers. Due to their excellent resistance to high temperatures, corrosion, high filtration accuracy, and good cleaning performance, they are widely used in various industrial fields. In high-temperature flue gas emission environments such as coal-fired power plants, waste incineration plants, steel mills, and cement factories, PPS bags can effectively capture dust particles, meet stringent environmental emission standards, and are particularly suitable for complex operating conditions containing acidic gases (such as SO2, SO3) and alkaline dust. Additionally, PPS bags can be used in flue gas purification systems in industries such as chemicals, metallurgy, and coking, ensuring equipment stability and extending service life. They are one of the key materials for achieving industrial dust emission standards.The coking coal car's flue gas temperature can instantly soar to 240°C. The PPS+PTFE composite filter bag, with its ability to withstand temperatures up to 230°C instantaneously, and the PTFE fabric's non-dripping advantage at 230°C, effectively captures tar and spark dust mixtures. The fibers are treated to repel oil and water, with a contact angle of ≥120°, preventing tar particles from penetrating the filter material. Surface pulse cleaning can easily strip off the residue. After 6,000 hours of system operation, the air permeability decreases by less than 5%, and the emission concentration remains below 10 mg/Nm³, effectively preventing the leakage of yellow smoke during the coal loading process and significantly improving the environment in and around the factory.