What You Need to Know About PTFE 

Key Takeaways

• PTFE is a high-performance engineering plastic known for its superior sliding properties and non-stick surface.

• PTFE has a water absorption rate of 0.00%, making it completely waterproof.

• PTFE remains stable and maintains its strength from as low as -250°C (-418°F) up to +260°C (+500°F).

Features of PTFE

PTFE (Polytetrafluoroethylene) is a high-performance plastic distinguished by its exceptional sliding capabilities and non-stick characteristics. With an incredibly low dynamic friction coefficient of just 0.04, its smooth surface delivers outstanding performance in sliding components.

Furthermore, PTFE offers excellent thermal stability, with a continuous operating temperature of 260°C (500°F), while retaining its strength even in cryogenic conditions down to -250°C (-418°F). Its molecular structure is highly resistant to oxidation, earning it a V-0 flame-retardant rating under UL94 standards. It is also highly water-repellent with a 0.00% absorption rate—it simply does not soak up moisture.

• Superior sliding properties and wear resistance

• Excellent heat and cold resistance

• Zero water absorption

• Outstanding chemical resistance

• High electrical insulation

• Inherently flame-retardant

PTFE Grades

In addition to the standard (virgin) grade, PTFE is available in several specialized formulations to enhance its mechanical performance:

• Standard (Virgin) Grade

• Glass Fiber Reinforced Grade

• Graphite Reinforced Grade

• Polyimide Blended Grade

Considerations for Material Selection

PTFE has a high coefficient of linear thermal expansion, meaning it expands and contracts significantly with temperature changes. To ensure parts fit perfectly during assembly, strict temperature control in storage and production areas is essential. Because PTFE is very soft and highly reactive to heat, achieving extreme dimensional precision is exceptionally challenging. Additionally, it tends to develop "burrs" during machining, which require expert skill and manual effort to remove properly.

• High Thermal Sensitivity: Dimensions shift easily with temperature.

• Machining Difficulty: Soft material makes precision and deburring a challenge.

Step Up Your Project with Yumoto Electric

Yumoto Electric manufactures custom PTFE machined parts starting from a single piece. We have experience with over 200 materials, including metals such as aluminum alloys, stainless steel, molybdenum, and titanium; and engineering plastics including PEEK, POM, and MC Nylon.

If you’re unsure about material selection or machining methods, we offer complimentary consultations to help optimize your design and production. For any questions, please feel free to contact us.