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PEEK
Material Type
Engineering Plastics
Material Full Name
Polyether Ether Ketone
Process Compatibility
Injection Molding, CNC Machining
Basic Properties
Property |
Parameter/Performance |
Remarks |
|---|---|---|
| Chemical Name | Polyetheretherketone | Aromatic ether-ketone backbone (-O-Ph-CO-Ph-O-Ph-) |
| Molecular Structure | Semi-crystalline thermoplastic (20-35% crystallinity) | Annealing can increase to 40% |
| Density | 1.30~1.32 g/cm³ | 60% lighter than steel |
| Color | Natural light brown (black/gray dyeable) | Opaque; medical grade is ivory-white |
| Mechanical Properties | ||
| – Tensile Strength | 90-100 MPa (23℃) | Retains 50% strength at 260℃ |
| – Impact Strength | 8-12 kJ/m² (notched Izod) | No brittle fracture at -196℃ |
| – Wear Resistance | PV limit >4 MPa·m/s | Self-lubricating, comparable to PTFE |
| Thermal Properties | ||
| – HDT (1.82MPa) | 160-170℃ (as-molded)/315℃ (annealed) | Highest continuous use temp among plastics |
| – Service Temperature | -100℃~260℃ (short-term 300℃) | UL RTI 250℃ |
| Chemical Properties | ||
| – Chemical Resistance | Resists all organic solvents (except conc. H₂SO₄) | Withstands 1000+ steam sterilization cycles (134℃) |
| – Flammability | UL94 V0 (1.5mm, no additives) | LOI 35% (self-extinguishing) |
Processing Characteristics
Drying Essential:
- 150℃ for 4-6 hours (moisture <0.02%)
- Moisture causes voids
Melt Temperature:
- 370-400℃ (crosslinks >430℃)
Mold Temperature:
- 160-200℃ (higher temps improve crystallinity)
Special Requirements:
- High-temp screws (withstand >400℃)
Common Application Areas
-
Medical: Spinal cages, heart valve stents
-
Aerospace: Cabin interiors, engine seals
-
Energy: Oilfield logging tools, nuclear valve seats
-
Electronics: 5G insulators, IC test sockets
PEEK Modified Types
Type |
Characteristics |
Typical Applications |
|---|---|---|
| Neat PEEK | Ultra-pure (<50ppm metal ions) | Semiconductor wafer carriers |
| 30% Glass-Fiber PEEK | Flexural strength >200 MPa | Aircraft engine blades |
| Carbon-Fiber PEEK | Thermal conductivity 1.8 W/mK | Spacecraft thermal shields |
| Wear-Resistant PEEK | PTFE/graphite additives (μ<0.2) | Artificial joint acetabular cups |
| Medical-Grade PEEK | ISO 10993-1 compliant | Orthopedic implants, dental tools |
Advantages & Disadvantages
Advantages |
Disadvantages |
|---|---|
| Highest heat resistance among plastics (260℃ long-term) | Extremely expensive (10-15× PA66 cost) |
| Excellent radiation resistance (>1000 kGy) | Difficult processing (>370℃ required) |
| Biocompatibility (long-term implants) | Unfilled grades lack wear resistance |
Other Engineering Plastics Selection
POM Materials
PA Materials
PC Materials
PET Materials
PES Materials
FAQ Of PEEK Materials
Visit our FAQ center for more questions.
What are the main properties of PEEK plastic?
PEEK offers exceptional high-temperature resistance, mechanical strength, and chemical stability, making it suitable for demanding industrial environments.
In which fields is PEEK plastic commonly used?
It is widely applied in aerospace, medical devices, automotive components, and electronics industries.
What is the processing temperature range for PEEK plastic?
The typical processing temperature ranges between 340°C to 400°C, depending on application requirements.