The reinforcement of PTFE (chemically Polytetrafluoroethylene and colloquially referred to as Teflon ® ) with high performance polymers has many advantages compared to inorganic fillers. The most important properties are the excellent wear behavior without abrasion of the sliding partner. TECAPOWDER PI (based on P84 ® by Evonik) is an active filler in PTFE. This is shown by a highly increased creep resistance and a good mechanical bonding of the powder into the matrix.
The development of extremely fine powders lead to excellent surfaces of machined parts and skived films of these compounds.
TECAPOWDER PI filled PTFE (Teflon ® ) compounds outperform inorganic fillers in many ways. Many inorganic fillers have poor wear resistance, low elongations at high loadings and some fillers can be abrasive to the mating surface.
| Lip-seals, packings, and spring-reinforced dynamic seals | 93 % PTFE / 7 % PI Powder |
| Rod packings, rider and piston rings in compressor applications, proved in "bone-dry" gas compressors as a piston and rider ring, skived films as gliding surfaces on several machinery elements, especially in textile equipment | 85 % PTFE / 15 % PI Powder |
| Bearings and gliding elements in highly stressed applications, sealing bands for rotating equipment in compressors and pumps | 80 % PTFE / 20 % PI Powder |
| Piston rings in pumps and compressors for dry gases, gliding elements in weaving machines | 75 % PTFE / 20 % PI Powder / 5 % Graphite |
| This composition for hot moulding is used in high load bearings and sealants in machining equipment and as guidance material in mechanical end uses | 60 % PTFE / 40 % PI Powder |
| Push-pull cable inner-liners to maintain long service life without any additional lubrication | 90 % PTFE / 10-15 % PI Powder |
The most important properties of TECAPOWDER PI filled PTFE (Teflon ® ) are excellent wear resistance at elevated temperatures, high elongation, and no abrasion of the sliding partner — all without the need for lubrication.
TECAPOWDER PI as an active filler in PTFE improves the mechanical properties of the PTFE. Blending 5-20 % loadings of TECAPOWDER PI VPD in PTFE creates wear resistant PTFE compounds that extend the performance envelope of standard PTFE materials especially at high pressures, velocities and temperatures. TECAPOWDER PI polyimide filled PTFE compounds are especially good running against soft mating surfaces.
Teflon ® is a registered trademark of E.I. du Pont de Nemours and Company.