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Polysulfone (PSU) is a high-performance amorphous thermoplastic engineering polymer offering an excellent combination of thermal stability, chemical resistance, optical transparency, and dimensional reliability. With a continuous service temperature of up to 150℃ and a glass transition temperature (Tg) of ≈185℃, Polysulfone (PSU) maintains stable mechanical performance under long-term thermal exposure. Its inherent flame resistance, high purity, and excellent processing flexibility make it suitable for demanding applications in medical devices, food processing, electronics, and industrial components.
Polysulfone (PSU) provides excellent optical clarity with light transmittance of >80% (depending on thickness), making it suitable for transparent medical components such as dialyzer sight windows and electronic covers. With a low CLTE of ≈50 × 10⁻⁶/℃ (23–100℃), Polysulfone (PSU) maintains dimensional stability under temperature variations, ensuring reliable performance for precision components.
Polysulfone (PSU) provides inherent flame resistance with a UL94 V-0 rating without additional flame-retardant additives. This eliminates additive migration risks while maintaining material purity, making it suitable for safety-critical applications requiring reliable flame performance. Polysulfone (PSU) also generates low smoke during combustion, supporting use in enclosed environments.
Polysulfone (PSU) provides reliable thermal performance with a continuous service temperature of up to 150℃ and a Tg of ≈185℃. It maintains mechanical strength and dimensional stability during prolonged heat exposure, making it suitable for electronic housings and food processing components. Compared with general-purpose plastics such as ABS, Polysulfone (PSU) offers better heat resistance and reduced deformation at elevated temperatures.
Polysulfone (PSU) provides excellent resistance to acids, alkalis, and organic solvents, including hydrochloric acid, sodium hydroxide, ethanol, and methanol. Its hydrolysis resistance enables reliable performance in wet environments such as medical sterilization and food-processing equipment. Food-contact and medical-grade Polysulfone (PSU) formulations can comply with FDA 21 CFR Part 177.1650 and ISO 10993 requirements, supporting applications requiring high purity and chemical stability.
Polysulfone (PSU) provides reliable mechanical performance with a tensile strength of ≈70 MPa and Izod notched impact strength of ≈60 J/m at 23℃. Its excellent creep resistance and dimensional stability under continuous loading make it suitable for structural components such as industrial pump parts and medical device frames.
| Category | Specification | Details |
| Chemical Identifiers | CAS Number | 25135-51-7 |
| Molecular Formula | (C₁₂H₈O₄S)ₙ | |
| Molecular Weight | 20,000–50,000 (ensures consistent mechanical and thermal performance) | |
| Physical & Thermal Properties | Appearance | Transparent or slightly amber granule/pellet |
| Density | ≈1.24 g/cm³ | |
| Continuous Service Temperature | Up to 150℃ | |
| Glass Transition Temperature (Tg) | ≈185℃ | |
| Light Transmittance | >80% (for 3mm thick samples, visible light range) | |
| Flame Rating | UL94 V-0 (1.6mm thickness, no additives) | |
| Compliance Standards | Food Contact | Compliant with FDA 21 CFR Part 177.1650 |
| Medical Biocompatibility | Compliant with ISO 10993-1 | |
| Eco-Compliance | RoHS/REACH (Free of restricted substances: lead, cadmium, PBDEs) |
Polysulfone (PSU) is widely used in medical components such as dialyzer housings, surgical instrument handles, and drug delivery system reservoirs. Its excellent transparency, chemical resistance, biocompatibility (ISO 10993), and sterilization capability support reliable performance in reusable and diagnostic medical devices.
For example, Polysulfone (PSU) dialyzer housings provide excellent transparency for blood-flow monitoring while maintaining resistance to disinfectants during post-treatment cleaning.
Polysulfone (PSU) is widely used in electronic components such as connector insulators, sensor housings, and LED lighting diffusers. Its thermal stability up to 150℃ and inherent flame retardancy (UL94 V-0) support reliable performance in electrical enclosures and high-temperature environments.With light transmittance of >80% and excellent optical stability, PSU is also suitable for LED lighting components requiring long-term clarity and resistance to yellowing.
Polysulfone (PSU) is used in food processing components including conveyor guides, mixer blades, beverage filling nozzles, and fluid-handling parts. Compliant with FDA 21 CFR Part 177.1650, PSU provides high material purity with low risk of substance migration in food-contact applications. Its chemical resistance and hydrolysis stability enable reliable performance during repeated cleaning cycles and exposure to hot liquids or acidic food environments.
Polysulfone (PSU) is used in industrial components such as pump housings, valve seats, and chemical processing parts. Its creep resistance and chemical stability enable reliable performance in environments involving solvents, oils, and corrosive fluids.
For example, Polysulfone (PSU) pump housings in wastewater treatment systems provide long-term durability under continuous exposure to demanding operating conditions.
Polysulfone (PSU) can be processed through injection molding, extrusion, and machining. Its excellent dimensional stability and processing flexibility enable the production of complex components with high precision requirements.
Yes. Medical-grade Polysulfone (PSU) is widely used in medical devices due to its biocompatibility, transparency, chemical resistance, and sterilization resistance. Polysulfone (PSU) can comply with ISO 10993 requirements and withstand repeated sterilization processes, including autoclaving at 121℃, making it suitable for reusable medical components such as dialyzer housings and surgical instruments.
Polysulfone (PSU) resists most acids, alkalis, organic solvents, and hydrolysis, ideal for wet or corrosive conditions.
Yes. Polysulfone (PSU) has inherent flame retardancy and can achieve UL94 V-0 performance without external flame-retardant additives. This helps maintain material purity and avoids potential additive migration, which is especially important for medical, food, and electrical applications.
