| PTFE-Type | Influence of Fillers | Filler Content in % of Weight | Limits of Use |
|---|---|---|---|
| PTFE filled with glass fibers | • higher pressure and wear resistance as well as better thermal conductivity • very good chemical resistance • good dielectric properties | up to 40% | resistant to organic solvents, non-resistant to alkaline solutions and acids |
| PTFE filled with carbon fibers | • very low deformation under load • good wear resistance, even in water • higher thermal conductivity and lower thermal expansion than glass fibers • very good chemical resistance | up to 25% | carbon fibers are chemically inert |
| PTFE filled with carbon | • high pressure resistance and hardness • good sliding properties and wear behavior • good thermal conductivity • good chemical resistance • low volume and surface resistivity • electrically conductive | up to 35%, also in combination with graphite | compound is brittle, filler may be attacked by oxidizing media |
| PTFE filled with graphite | • good lubricating effect • low friction coefficient • no static charging • good thermal conductivity • very good chemical resistance | typically up to 5%, in exceptional cases up to 15%, also in combination with glass fibers or carbon | high abrasion when used with hard metals, is attacked by oxidizing media |
| PTFE filled with molybdenum disulfide (MoS2) | • good sliding properties and wear behavior • good no-lube operation in combination with bronze | up to 10%, also in combination with glass fibers or bronze | not resistant when used with hot, concentrated sulfuric acid |
| PTFE filled with bronze | • good sliding properties and wear behavior • low cold flow • good thermal conductivity • lower chemical resistance • high pressure resistance | up to 60%, also in combination with MoS | may be attacked by acids and water |
| PTFE filled with organic fillers (high-performance thermoplastics) | • outstanding sliding properties and wear behavior • good chemical resistance • high pressure resistance in some cases • suitable for soft mating surfaces, e.g. aluminum • non-abrasive | up to 20%, may be higher in combination with different fillers | depending on the respective filler |
