PAI vs PEI — Extreme Heat vs Transparent Rigidity
Comparison Overview
PAI vs PEI — Extreme Heat vs Transparent Rigidity. Choose PAI when service temperature exceeds 200°C …
PAI — Polyamide-imide
Properties
| Property | Value |
|---|---|
| Service Temp. | 260°C |
| Density | 1.40 g/cm³ |
| Tensile Strength | 120 MPa |
| Flexural Modulus | 4,500 MPa |
| Hardness | Rockwell E95 |
| Flammability | V-0 |
Advantages
- Highest continuous service temperature (260°C)
- Excellent mechanical strength and rigidity
- Outstanding wear and creep resistance
- Excellent dimensional stability
- Good chemical resistance
Applications
AerospaceSemiconductorAutomotiveOil & Gas
Price Level
High
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
Selection Guidance
✓ Choose PAI
Choose PAI when service temperature exceeds 200°C or ultra-high mechanical strength and wear resistance are required.
✓ Choose PEI
Choose PEI for applications needing transparency and high rigidity at a lower cost; PEI is the economical choice within 170°C.
Price Reference
PAI: High
PEI: Med-High
PAI is approximately 3-5x the price of PEI.
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