PEI vs PVDF — High-Temp Rigidity vs Chemical Purity
Comparison Overview
PEI vs PVDF — High-Temp Rigidity vs Chemical Purity. 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
PVDF — Polyvinylidene Fluoride
Properties
| Property | Value |
|---|---|
| Service Temp. | 150°C |
| Density | 1.78 g/cm³ |
| Tensile Strength | 55 MPa |
| Flexural Modulus | 2,100 MPa |
| Hardness | Shore D80 |
| Flammability | V-0 |
Advantages
- Outstanding chemical resistance
- High purity — minimal extractables
- Excellent UV stability and weather resistance
- Unique piezoelectric properties
- Good flame retardance (V-0)
Applications
Chemical ProcessingSemiconductorWater FiltrationBatteryWire & Cable
Price Level
Med-High
Selection Guidance
✓ Choose PEI
Choose PEI when higher rigidity, higher service temperature (170°C), transparency, or V-0 flammability rating is needed.
✓ Choose PVDF
Choose PVDF when facing strong corrosive chemicals, needing high-purity materials, or requiring excellent weather resistance.
Price Reference
PEI: Med-High
PVDF: Med-High
PEI and PVDF are similarly priced; PEI is typically slightly lower.
Need Selection Advice? Contact Us for a Quote
Our engineers will recommend the best material solution for your application
Contact JEKIN →