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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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