FAQ PEEK
Question 1: What makes PEEK better than other plastics?
Answer: PEEK offers superior mechanical strength, high heat resistance, and exceptional chemical resistance, making it more durable than standard engineering plastics like Nylon, ABS, or Polycarbonate.
Question 2: Can PEEK sheets replace metals in applications?
Answer: Yes. PEEK sheets are commonly used as metal replacements in automotive, aerospace, and industrial applications due to their strength-to-weight ratio, corrosion resistance, and machinability.
Question 3:Can PEEK be sterilized?
nswer: Yes, PEEK is highly resistant to sterilization methods like autoclaving, gamma radiation, and ethylene oxide sterilization.
Question 4: What’s the difference between Virgin PEEK and filled PEEK?
Answer: Virgin PEEK has a balanced property set, while filled grades (glass, carbon, PTFE, etc.) enhance specific properties like strength, wear resistance, or conductivity.
Question 5: How does PEEK compare to PTFE (Teflon)?
Answer: PEEK has higher strength, thermal resistance, and wear resistance but lower chemical resistance to strong acids.
Question 6: Does PEEK absorb moisture?
Answer: Minimal (0.1–0.5% for unfilled grades), but pre-dry at 150°C for 3–4 hours before high-precision machining.
Question 7: Can PEEK be bonded or welded?
Answer: Yes—use epoxy adhesives or ultrasonic welding. Surface treatment (plasma) improves adhesion.
Question 8: Is PEEK UV-resistant?
Answer: Unfilled grades degrade outdoors; UV-stabilized variants are available.
Question 9: What is the difference amongPEEK, PTFE, PEIand Aluminum?
Answer: Please refer to the matrix below:
Aspect | PEEK | PTFE | PEI (Ultem) | Aluminum |
Max Temp | 250°C | 260°C | 170°C | 200°C (softens) |
Tensile Strength | 90–170 MPa | 20–35 MPa | 110 MPa | 270–310 MPa |
Chemical Resistance | Excellent (except conc. sulfuric acid) | Exceptional | Moderate | Poor (corrodes) |
Weight | 1.3–1.5 g/cm³ | 2.1–2.3 g/cm³ | 1.27 g/cm³ | 2.7 g/cm³ |
Cost | $$$$ | $$$ | $$$ | $$ |
Question 10: Can PEEK rods replace metal parts in high-temperature applications?
Answer: Yes—PEEK retains strength up to 250°C and eliminates galvanic corrosion.
Question 11: Is PEEK suitable for machining complex geometries?
Answer: Yes—use carbide tools, high-speed steel, and coolant to prevent overheating.
Question 12:Can PEEK rods be sterilized repeatedly?
Answer: Yes—via autoclave (134°C), gamma radiation, or ethylene oxide.
Question 13: Can PEEK rods be bonded or welded?
Answer: Yes—use epoxy adhesives or ultrasonic welding. Plasma treatment improves adhesion.
Question 14: Are PEEK rods resistant to radiation?
Answer: Yes, PEEK has excellent resistance to gamma radiation, X-rays, and UV exposure, making it ideal for aerospace and medical applications.
Question 15: Does PEEK rods absorb moisture?
Answer: Minimal (0.1–0.5% for unfilled grades), but pre-dry at 150°C for 3–4 hours before high-precision machining.
Question 16: Can PEEK tubes handle high-pressure fluids?
Answer: Yes—CFR PEEK tubes withstand up to 150 bar; wall thickness and diameter determine max pressure.
Question 17: Are PEEK tubes compatible with steam sterilization?
Answer: Yes—autoclave at 134°C for 20 minutes without degradation.
Question 18:How do PEEK tubes compare to PTFE tubes?
Answer: PEEK offers 5x higher tensile strength and better thermal stability but lower chemical resistance to strong acids.
Question 19: Can PEEK tubes be joined or welded?
Answer: Yes—use thermal welding, adhesive bonding (with plasma treatment), or compression fittings.
Question 20: How to cut PEEK tubes without burrs?
Answer: Use a sharp blade or laser cutting; deburr with fine-grit sandpaper.
Question 21: Can PEEK tubes be machined?
Answer: Yes, PEEK can be CNC-machined, cut, and drilled for custom applications.
Question 22: Could you please compare the properties of PEEK Tubes, PTFE Tubes, Steel Tubes and Nylon Tubes?
Answer: Yes, please refer to the table below:
Aspect | PEEK Tubes | PTFE Tubes | Stainless Steel Tubes | Nylon Tubes |
Max Temp | 250°C | 260°C | 600°C (softens) | 120°C |
Tensile Strength | 90–170 MPa | 20–35 MPa | 500–700 MPa | 70–90 MPa |
Chemical Resistance | Excellent (excl. conc. sulfuric acid) | Exceptional | Poor (corrodes) | Moderate |
Weight | 1.3–1.5 g/cm³ | 2.1–2.3 g/cm³ | 8.0 g/cm³ | 1.1–1.2 g/cm³ |
Cost | $$$$ | $$$ | $$ | $ |
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