Polysulfone (PSU) is a slightly amber-colored, amorphous, transparent or translucent polymer with excellent mechanical properties. It exhibits high rigidity, wear resistance, and high strength, maintaining good mechanical performance even under steam sterilization and other disinfection environments. Its long-term service temperature is 160°C, and its short-term service temperature is 190°C. It possesses high thermal stability, hydrolysis resistance, good dimensional stability, low molding shrinkage rate, is non-toxic, radiation resistant, flame retardant, and self-extinguishing. It can be widely used in machinery manufacturing, electronics and electrical appliances, automobiles, aerospace, medical devices, and other fields.

Polyphenylsulfone (PPSU), a type of poly (phenylene sulfone) resin, is a thermoplastic engineering plastic. Its molecular backbone contains sulfone groups and aromatic nuclei, classifying it as a non-crystalline resin. However, some of its mechanical properties surpass those of polysulfone resin. It is stable against general acids, alkalis, salts, alcohols, and aliphatic hydrocarbons, except for strong polar solvents, concentrated nitric acid, and sulfuric acid. It offers good rigidity and toughness, excellent temperature and heat oxidation resistance, superior creep resistance, non-toxicity, good insulation, and self-extinguishing properties, and is easy to process. As it does not contain bisphenol A (BPA), it is widely applicable for medical device components, tableware, cups, feeding bottles, etc.

Polyethersulfone (PES), also a non-crystalline polymer, offers higher heat resistance and rigidity compared to polysulfone. Its glass transition temperature (Tg) is 225°C, and its heat deflection temperature (HDT) is 203°C. Mechanical properties remain largely unchanged at 200°C. PES provides excellent creep resistance and dimensional stability at high temperatures. Compared to polysulfone, PES has better melt processability and lower melt viscosity. It features low molding shrinkage (only about 0.6%) and good dimensional stability. Its primary applications are in electronics and electrical appliances, automobiles, medical devices, office supplies, filtration membranes, and other fields.