PTFE

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Key Characteristics of PTFE

PTFE is a high-performance thermoplastic recognized for its outstanding chemical resistance, low friction, and wide thermal stability range.

 

It is made from polytetrafluoroethylene resin, which gives the material its non-stick surface and extremely low coefficient of friction.

PTFE provides excellent electrical insulation and maintains dimensional stability in both high-temperature and chemically aggressive environments.

 

This material is ideal for seals, gaskets, insulating bushings, and lining systems that must resist sticking, wear, and contamination.

PTFE is a dependable solution for applications that demand consistent performance in the most chemically or thermally challenging conditions.

How PTFE is Used

Seals and Gaskets: PTFE’s low friction and chemical inertness make it ideal for sealing components in corrosive environments.

 

Lining Systems: Its non-stick surface and chemical resistance make it suitable for tank, pipe, and vessel linings.

 

Insulating Bushings: PTFE’s excellent dielectric strength allows use in high-voltage insulation applications.

 

Bearings and Slides: Its self-lubricating properties reduce wear and friction in moving assemblies.

 

Valve Seats: PTFE’s ability to withstand aggressive chemicals ensures long-term sealing performance in valves.

Technical Specifications

PTFE is a soft, flexible, and non-load-bearing polymer. Its most famous attribute is its low coefficient of friction — among the lowest of any solid material. It’s extremely slippery, which makes it ideal for seals, bearings, and gaskets. However, its creep and deformation under load are significant compared to engineering thermoplastics like PEEK or PEI. 

Tensile Strength: ~20–35 MPa

Flexural Strength: ~15–25 MPa

Tensile Modulus (Elastic Modulus): ~0.5 GPa

Elongation at Break: ~200–400%

Impact Strength (Notched Izod): No break (very tough and ductile)

Melting Point: ~327°C (620°F)

Glass Transition Temperature (Tg): ~115°C

Continuous Use Temperature: ~260°C (500°F)

Thermal Conductivity: ~0.25 W/m·K

Coefficient of Thermal Expansion: ~120 × 10⁻⁶ /°C