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GuideDiode Trading EST · 3 min read
07 November, 2026 | 
Admin
Graphite filled PTFE is PTFE with graphite blended into the resin, so the finished sheet or rod keeps the chemical resistance of PTFE but gains lower friction and better behaviour under load and heat. The common grade is 15 percent graphite filled PTFE. This guide explains what graphite adds, where it is used and how it compares with other PTFE grades.
It is one of several PTFE grades. The right one depends on temperature, medium, load and whether the part moves.
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Virgin PTFE is soft and can creep under load. Adding graphite improves wear resistance and reduces friction further, and it helps the material hold its shape in sliding applications. The filled material is usually dark grey or black.
Like other PTFE grades, graphite filled PTFE resists a wide range of chemicals and acids and handles temperatures up to about 260 °C. Its friction is very low, which suits moving parts. It is not used where a pure, white or food-contact material is needed, because the graphite colours and changes the material.
Common uses include bearings and bushes, piston rings and guide rings, seals and packings for pumps and valves, slide plates and wear strips and parts in chemical and oil and gas plants where friction and heat matter. See the PTFE machined components for finished parts.
Virgin PTFE is best for purity, electrical insulation, food and pharmaceutical use. Glass-filled PTFE gives higher strength and wear resistance. Graphite-filled PTFE gives lower friction and good heat handling. The PTFE grades guide compares all grades side by side, and our virgin PTFE (grey) sheets and rods covers the virgin grade.
Start with the job: if the part slides, graphite or glass-filled may be better; if the part must be pure or white, choose virgin. Then check temperature, medium and load. If you are not sure, send us the details and we will recommend a grade.
Graphite filled PTFE is supplied as sheets and rods, and parts can be machined to your drawing. Send the size, quantity and application. A Material Test Certificate is provided with every order.
Filled PTFE machines well with sharp tools and light cuts, but it can be abrasive on cutting edges, so tool wear is higher than with virgin PTFE. Allow for thermal expansion when you set tolerances, and let the part reach room temperature before final measurement. Leave a small machining allowance on rods and sheets so the finished part meets the drawing.
The most common mistakes are choosing a filled grade where purity is required, ignoring creep under constant load, and forgetting that graphite makes the material dark. Another mistake is assuming all PTFE grades behave alike at high temperature. Confirm the grade and limits for your duty before ordering.
Diode Trading EST supplies industrial PTFE (Teflon) to factories, petrochemical plants and oil and gas companies, with a Material Test Certificate (MTC) on every order. Our warehouse is in Al Khalidiyah Ash Shamaliyah, Dammam 32231, and we ship across Saudi Arabia. Send the product, grade, size and quantity to sales@diode.sa or engineeringplastics@diode.sa, or call +966 51 083 8213, and we will quote. You can also download the virgin PTFE technical datasheet.
The common grade is 15 percent graphite filled PTFE.
Use virgin PTFE for food and pharmaceutical applications. Filled grades are for industrial parts.
Like other PTFE grades, up to about 260 °C. Confirm the limits for your application.
This guide on graphite filled ptfe is a starting point. For more help with graphite filled ptfe, send us your application, temperature and size and we will recommend the right specification. Background reading: PTFE on Wikipedia.
PTFE cluster: PTFE products in Saudi Arabia · PTFE grades guide · virgin PTFE (grey) sheets and rods · glass-filled PTFE · carbon-filled PTFE · bronze-filled PTFE
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