Contact usPTFE (Teflon®) is a semi-crystalline fluoropolymer thermoplastic with machining challenges due to high expansion and low conductivity. This guide covers attributes, applications, design notes, finishing options, UK stock sizes, and property tables.
PTFE (Polytetrafluoroethylene) is a semi-crystalline fluropolymer thermoplastic. It is commonly referred to as Teflon which is a brand name.
PTFE is the most widely used fluropolymer in a range of applications. It is known for being highly resistant to chemicals and for its superior thermal stability.
Compared to other engineering grade thermoplastics it has poor mechanical properties, though glass and carbon filled grades with improved dimensional stability are available.
Because of its resistance to chemicals, PTFE plastic is commonly used in chemical, food and pharmaceutical engineering.
PTFE is favoured over PVDF for sliding applications with exposure to extreme chemical stress.
Machining of PTFE must take conductivity and expansion effects into account. When machining PTFE, we ensure we use very sharp tools and plenty of coolant to avoid any stability issues.
You may also see PTFE referred to as:
Due to its high coefficient of expansion, PTFE is usually machined to tolerances of around 0.13mm.
Tighter tolerances are rarely required due to the natural resiliency of the material. Where tighter tolerances are required, it is advised to use stress-relieved PTFE.
Here are the standard stock sizes/colours for PTFE in the UK. Please note we do not supply stock material, the information provided is purely for design and research purposes.
Stock sizes will vary depending on supplier. Please get in contact to discuss further.
PTFE is typically available in rod and plate form in lengths of 2000mm and 1200mm.
Please note: some sizes may be non-stocked items and subject to minimum order quantities.
Technical properties
