Engineering plasticsIntermediate
PEEK Engineering Plastic Guide
Performance, processing, applications, and design rules for high-end PEEK parts.
Materials Engineer Zhou2024-11-2511 min read5,6214.8
Summary
PEEK handles 260°C continuous service, is chemically inert and biocompatible — ideal for medical, semiconductor, and chemical duty — but is expensive and hygroscopic.
1Properties
Continuous use 260°C, short-term 300°C. Tensile ~100 MPa, flexural modulus 3.6 GPa. Dry at 150°C for 3 h before machining.
2Processing
CNC with PCD or carbide, high speed low feed, avoid >400°C decomposition. SLS/MJF nylon can validate geometry before PEEK production.
3Applications
Medical implants, wafer carriers, pump seals, aerospace cable brackets — specify medical vs industrial grade.
4Design notes
Avoid sharp corners (R ≥0.5 mm). Uniform walls. Account for CTE mismatch with metals (~47×10⁻⁶/°C).
Key points
- Service >200°C → consider PEEK
- Medical implants → biocompatible grade
- Must dry before machining
- Avoid sharp corners and thick walls
- Cost ~10–20× POM
PEEKHigh-temp plasticMedical
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