graphite Sheets graphite Sheets graphite Sheets
PTFE sheets with filler 15% glass + 5% graphite content (80% virgin ptfe + 15% glass fibres + 5% graphite)
Properties:
- Excellent chemical stability
- Better thermal conductivity and coefficient of friction
- Improved compression and wear resistance
- Self lubricating properties specially at starting point.
Main applications:
- 15% Glass + 5 % Graphite filled PTFE is used in dynamic seal applications with rotating and alternating movements
- Pneumatic applications
- Mechanical applications
- Hydraulic applications
Graphite is the most commonly used fi ller for dynamic seal applications where both rotating and alternating movements are involved, pneumatic, hydraulic and mechanical parts. 15% Glass + 5 % Graphite filled PTFE sheets are often used in dynamic seal applications, where self-lubricating properties, especially at starting point. The percentages used vary between 5 and 15%. Graphite lowers the coefficient of friction and is, therefore, often added to other types of filled PTFE for improving this property. It improves the deformation under load, strength and, to a minor degree, the wear properties.
The added 5% glass fibers improve the wear properties and, to a minor degree, also the deformation strength under load while leaving substantially unchanged the electrical and chemical characteristics. Glass itself, has a rather poor resistance against alkalis and is easily attacked by hydrofluoric acid. The coefficient of friction is slightly increased and for this reason, graphite is sometimes added to compensate this side effect.
