PPSIt is a high-performance thermoplastic specialty engineering plastic with outstanding features of high-temperature resistance, corrosion resistance, and superior mechanical properties. PPS is a sulfur-containing aromatic polymer; linear PPS becomes thermosetting plastic after crosslinking at above 350°C, while branched-chain PPS is thermoplastic. PPS was first industrially produced by Phillips Company in the United States in 1971, and after the patent expired, Japanese companies also began to research and produce it.PPS boasts excellent heat resistance with a melting point exceeding 280°C, a heat deflection temperature of over 260°C under a load of 1.8 MPa, and a long-term service temperature of 220-240°C.PPS resin inherently boasts excellent flame retardancy, enabling it to achieve UL94-0 and 5-V ratings (no droplets) without the need for flame retardants, while emitting minimal smoke during combustion.Japanese companies like Toray are typical, and currently, Japan's output has exceeded that of the United States.