Limitations of PCTFE
- Lower maximum service temperature compared to PTFE and PEEK
- Higher material cost than standard engineering plastics
PCTFE vs Other Materials
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PCTFE vs PTFE
- PCTFE provides significantly lower moisture absorption and better dimensional stability, while PTFE offers lower friction and broader temperature capability.
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PCTFE vs PEEK
- PEEK delivers higher mechanical strength and temperature resistance, whereas PCTFE excels in chemical resistance, barrier properties, and low permeability.
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PCTFE vs Metal
- PCTFE eliminates corrosion and reduces weight while offering reliable sealing and barrier performance, though it cannot replace metals in high-load structural applications.
When Should You Choose PCTFE?
PCTFE is typically selected when:
- Low moisture absorption and gas permeability are critical
- Tight dimensional tolerances must be maintained
- Chemical exposure is present alongside pressure or cryogenic conditions
- Metal corrosion or contamination must be avoided
- Long-term stability and reliability are required
- PCTFE may not be the best choice for high-temperature, high-friction, or heavily loaded applications
Frequently Asked Questions About PCTFE
Is PCTFE suitable for cryogenic applications?
Yes. PCTFE maintains toughness and dimensional stability at extremely low temperatures, making it well suited for cryogenic sealing and containment.
How does PCTFE compare to PTFE in moisture resistance?
PCTFE has significantly lower moisture absorption and permeability than PTFE, making it preferable for precision and barrier applications.
Is PCTFE chemically resistant?
Yes. PCTFE resists a wide range of chemicals, including acids, bases, fuels, and solvents, though compatibility should always be verified for specific media.