What is PSU material

I. Key Performance Indicators

1. High Temperature Resistance

• Long-term service temperature: 160–180°C (polyphenylsulfone (PPSU): 190–200°C).

2. Mechanical Strength

• Tensile strength: 70–85 MPa; notched impact strength: 60–70 J/m, balancing rigidity and toughness.

3. Chemical Stability

• Resistant to acids, alkalis, salts, and most organic solvents (e.g., fuel), but soluble in polar solvents (e.g., dichloromethane).

4. Processing Characteristics

• Requires high-temperature injection molding (290–330°C) with high dimensional accuracy (tolerance ±0.05 mm).

II. Main Categories and Application Differences

1. General-Purpose PSU

• Balanced comprehensive performance, used in conventional scenarios such as electronic components and automotive engine parts.

2. Polyethersulfone (PES)

• High temperature resistance (180–200°C) and transparency, suitable for medical sterilization devices (e.g., surgical handles, dialyzers).

3. Polyphenylsulfone (PPSU)

• Strongest chemical corrosion resistance, with a temperature resistance of up to 200°C, applied in aerospace (oil-resistant engine components) and chemical equipment.

III. Typical Application Fields

1. Medical Health

• Surgical instruments, endoscope components (resistant to steam/gamma ray sterilization).

2. Electronics and Electrical Engineering

• Components in high-temperature environments (coffee machine impellers, 5G insulation parts).

3. Automotive/Aerospace

• Engine sensor housings, turbocharger components (temperature and oil resistance); aircraft cabin structural parts (30% weight reduction compared to aluminum alloys).

4. Food Industry

• Coffee machine components, food processing equipment gaskets (FDA-compliant).