PEI vs PPSU — Rigid Transparency vs Tough Hydrolysis
Comparison Overview
PEI vs PPSU — Rigid Transparency vs Tough Hydrolysis. Choose PEI when higher rigidity, higher service te…
PEI — Polyetherimide
Properties
| Property | Value |
|---|---|
| Service Temp. | 170°C |
| Density | 1.27 g/cm³ |
| Tensile Strength | 105 MPa |
| Flexural Modulus | 3,300 MPa |
| Hardness | Rockwell M109 |
| Flammability | V-0 |
Advantages
- High rigidity and strength
- Excellent transparency — ideal for sight glass
- Inherent V-0 flammability rating
- Excellent electrical insulation
- Excellent dimensional stability
Applications
AerospaceMedical DevicesElectronicsAutomotive LightingMicrowave Comms
Price Level
Med-High
PPSU — Polyphenylsulfone
Properties
| Property | Value |
|---|---|
| Service Temp. | 180°C |
| Density | 1.29 g/cm³ |
| Tensile Strength | 70 MPa |
| Flexural Modulus | 2,400 MPa |
| Hardness | Rockwell M85 |
| Flammability | V-0 |
Advantages
- Best-in-class hydrolysis resistance
- Outstanding impact toughness
- Excellent thermal stability at 180°C
- Good transparency
- Withstands repeated steam sterilization
Applications
Medical DevicesFood ServiceAerospaceWater TreatmentInfant Care
Price Level
Medium
Selection Guidance
✓ Choose PEI
Choose PEI when higher rigidity, higher service temperature (170°C), better electrical properties, or lower cost is needed.
✓ Choose PPSU
Choose PPSU when higher impact toughness, excellent hydrolysis resistance, repeated steam sterilization, or humid environment use is required.
Price Reference
PEI: Med-High
PPSU: Medium
PEI and PPSU are similarly priced; PEI is slightly lower.
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