Polysulfone
Polysulfone: The High-Performance Engineering Thermoplastic
Polysulfone (PSU) is a high-performance engineering thermoplastic known for its exceptional thermal stability, mechanical strength, and chemical resistance. Widely used in demanding applications across medical, aerospace, and industrial sectors, Polysulfone offers superior performance where other materials fail.
Key Product Specifications
- Material Type: Amorphous thermoplastic
- Density: 1.24-1.37 g/cm³
- Tensile Strength: 70-75 MPa
- Flexural Modulus: 2.48-2.76 GPa
- Heat Deflection Temperature (HDT): 174-180°C at 1.8 MPa
- Continuous Service Temperature: -100°C to +160°C
- Flame Rating: UL 94 V-0
| Property | Value | Test Method |
|---|---|---|
| Water Absorption (24hr) | 0.30% | ASTM D570 |
| Dielectric Strength | 15-16 kV/mm | ASTM D149 |
| Volume Resistivity | 10^16 Ω·cm | ASTM D257 |
| Chemical Resistance | Excellent (acids, bases, alcohols) | - |
Polysulfone Grades Comparison
| Grade | Features | Typical Applications |
|---|---|---|
| Standard PSU | General purpose, high purity | Medical devices, food processing |
| Reinforced PSU | 30% glass fiber, improved stiffness | Structural components |
| High-Flow PSU | Enhanced processability | Thin-wall components |
Polysulfone FAQ
Q: What makes Polysulfone superior to other thermoplastics?
A: Polysulfone offers exceptional thermal stability (maintaining properties up to 160°C), outstanding mechanical strength retention at elevated temperatures, and excellent resistance to hydrolysis and chemicals. Unlike many plastics, it can withstand repeated steam sterilization cycles.
Q: Can Polysulfone be used in medical applications?
A: Absolutely. Polysulfone is USP Class VI and ISO 10993 compliant, making it ideal for medical devices and implantable components. Its ability to withstand repeated sterilization (autoclave, gamma, EtO) makes it particularly valuable for reusable medical instruments.
Q: How does Polysulfone perform in electrical applications?
A: Polysulfone exhibits excellent dielectric properties, with high volume resistivity (10^16 Ω·cm) and dielectric strength (15-16 kV/mm). It maintains these properties across a wide temperature range, making it suitable for electrical insulators and connectors.
Processing Guidelines
- Drying: 3-4 hours at 120-135°C
- Melt Temperature: 320-380°C
- Mold Temperature: 100-160°C
- Injection Pressure: 70-140 MPa
Applications of Polysulfone
| Industry | Applications |
|---|---|
| Medical | Surgical instruments, dialysis components, sterilization trays |
| Aerospace | Interior components, electrical connectors |
| Food Service | Microwave components, coffee makers, steam table parts |
Why Choose Polysulfone?
Polysulfone combines the best properties of high-performance thermoplastics: extreme dimensional stability, creep resistance, and the ability to maintain mechanical properties in harsh environments. Its FDA compliance and biocompatibility make it suitable for critical applications where safety is paramount.