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PEEK injection molding — the high-performance engineering polymer.

Polyetheretherketone is the highest-performing mainstream injection-moldable polymer. Continuous service to 250 °C, excellent chemical resistance, FDA and USP Class VI grades available. Aerospace, medical implants, oil-and-gas, semiconductor — wherever polymers must survive conditions that destroy everything else. Expensive but often irreplaceable.

QUICK SPECS
Tensile strength95 MPa
Tensile (GF30)170 MPa
Elongation (unfilled)50%
Heat deflection temp152 °C at 1.8 MPa
Continuous service250 °C
Melt temperature343 °C
Mold temperature170–200 °C
FlammabilityUL94 V-0 inherent
STATUSIN OPERATION
§ 01 / WHEN

When PEEK is the only option

PEEK is 50–100× more expensive per kg than ABS. It's chosen only when required:

Aerospace interior structureEngine nacelle parts, under-cowl components. Survives continuous 200 °C+ exposure.
Medical implantsSpinal cages, bone-screw assemblies. Bio-stable, X-ray translucent (for imaging).
Semiconductor processingWafer handlers, plasma etch chambers. Withstands cleaning chemistries that dissolve other plastics.
Oil & gas downholeSeals, insulators at 200 °C in sour gas environments.
Food processingValve seats, bushings. FDA-approved, autoclavable thousands of cycles.
EV & power electronicsHigh-temperature insulators near motors and inverters.
§ 02 / MOLDING

Molding requirements

PEEK requires production-grade tooling — prototype P20 tools don't survive PEEK's 343 °C melt temperature. Specific requirements:

  • Hardened tool steel only. H13 minimum, S136 or SKD11 preferred. P20 prototype tools degrade after 1,000–2,000 shots in PEEK.
  • Heated mold. 170–200 °C mold temperature required for dimensional stability and proper crystallinity. Standard oil-heat circulation.
  • Hot runner. Cold runners waste 30–50% of resin at $150/kg. Hot runner pays back in one production run.
  • Purging. PEEK cannot be purged with standard commodity purging compounds. Specialized PEEK purge or dedicated machine.

All of this is reflected in quote. PEEK tooling minimum is typically $15,000 for single-cavity production tool.

READY WHEN YOU ARE

PEEK molding for mission-critical applications.

PEEK jobs need engineering review before quoting. Send STEP + application context. ISO 13485 or AS9100D documentation available.

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