PEEK vs PET — Premium Performance vs Practical Economy
Comparison Overview
PEEK vs PET — Premium Performance vs Practical Economy. Choose PEEK when 260°C temperature rating, outstan…
PEEK — Polyetheretherketone
Properties
| Property | Value |
|---|---|
| Service Temp. | 260°C |
| Density | 1.32 g/cm³ |
| Tensile Strength | 100 MPa |
| Flexural Modulus | 4,000 MPa |
| Hardness | Rockwell M99 |
| Flammability | V-0 |
Advantages
- Best all-round balanced performance
- Excellent chemical resistance — nearly no solvent attack
- Excellent biocompatibility (ISO 10993)
- Good processability
- Outstanding wear and fatigue resistance
Applications
AerospaceMedical ImplantsSemiconductorAutomotiveFood Processing
Price Level
High
PET — Polyethylene Terephthalate
Properties
| Property | Value |
|---|---|
| Service Temp. | 120°C |
| Density | 1.38 g/cm³ |
| Tensile Strength | 75 MPa |
| Flexural Modulus | 2,800 MPa |
| Hardness | Rockwell M90 |
| Flammability | HB |
Advantages
- Excellent cost-performance ratio
- Good mechanical properties
- Excellent electrical insulation
- Good chemical resistance
- Excellent processability
Applications
Food PackagingMechanical PartsElectrical InsulationAutomotive InteriorTextile Machinery
Price Level
Low
Selection Guidance
✓ Choose PEEK
Choose PEEK when 260°C temperature rating, outstanding chemical resistance or biocompatibility is required, and budget allows.
✓ Choose PET
Choose PET when cost-sensitive, service temperature is below 120°C, and only moderate mechanical performance is needed.
Price Reference
PEEK: High
PET: Low
PEEK is 15-30x more expensive than PET.
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