20% Polyimide Filled PTFE
20% Polyimide-Filled PTFE sheets, rods and tubes. It can conform to FDA standards, and polyimide filler can be added to your special needs.
Description
20% Polyimide-filled PTFE is a high-performance, self-lubricating engineering plastic that blends 80% PTFE with 20% polyimide powder. It has the lowest wear rates and coefficients of friction among PTFE compounds, and it performs very well under high mechanical pressures and against soft mating surfaces.
This material is commonly available in stock shapes (rods, tubes, and sheets) for custom machining. The most common polyimide powder percentages in PTFE are 10%, 15%, 20% and 25%.
Advantages
Below are the reasons for using 20% Polyimide-filled PTFE material.
Low Friction and Wear
Highly suited for demanding dry-running and stop-start applications without requiring external lubrication.
Non-Abrasive
Ideal for use against soft, delicate mating surfaces like aluminium, brass, or mild steel.
High-Temperature Resistance
It can operate in high-temperature environments.
Mechanical Stability
Demonstrates diminished creep under load compared to standard, unfilled PTFE.
Applications
20% Polyimide-filled PTFE material is ideal for dry friction conditions in a non-corrosive environment. It is also suitable for rotary and reciprocating sealing systems and high-stress, low-speed industrial and automotive components.
Physical Properties of Polyimide Filled PTFE
| Test Items | Test Methods | Unit | 10% PI | 15% PI | 20% PI |
|---|---|---|---|---|---|
| Density | ASTM D792 | g/cm3 | 2.1 | 2.0 | 1.96 |
| Hardness Shore D | ASTM D2240 | Sh.D | 63 | 61 | 60 |
| Tensile strength | ASTM D4745 | mpa | 19 | 16 | 15 |
| Elongation at break 23°C | ASTM D4745 | % | 260 | 195 | 180 |
| Coefficient of static friction | ASTM D1894 | - | 0.16 | 0.18 | 0.2 |
| Max water absorption | ASTM D570 | % | 0 | 0 | 0 |
