PTFE TLFG 3124
(PTFE with fillers)
PTFE-TLFG 3124 is a suspension Polytetrafluorethylen (PTFE), which is filled with a special sliding type carbon and additional fillers.
Since this material is able to reach extremely low friction coefficients with at the same time improved allowable pressure it is favourably suitable for use in sliding applications, especially bridge bearings.
PTFE-TLFG 3124 is manufactured according to the same guidelines as the white virgin types PTFE, which are certified according to EN 1337 for the use in bridge bearings.
The mechanic and friction data measured at the MPA Stuttgart according to the friction and deformation values for rods and sheets thicker than 5,0 mm in bridge bearing quality can be taken from the following diagram:
| Property | Measuring method |
Dimension | PTFE standard white virgin |
PTFE TLBQ 3070 white virgin |
PTFE TLFG 3124 filled |
| Density | DIN EN ISO 1183-1 |
kg/m3 | 2140 - 2200 | 2140 - 2200 | > 2120 |
| Tensile strength | DIN EN ISO 527-1 und -3 |
N/mm2 | 23 | 29 - 40 | > 15 |
| Tensile elongation | DIN EN ISO 527-1 und -3 |
% | > 260 | > 300 | > 250 |
| Ball thrust hardness | DIN EN ISO 2039-1 |
N/mm2 | 22 | 23 - 33 | 37 |
| dyn. coefficient of friction dry1) |
EN 1337-2 | µ | n.a. | < 0,06 | < 0,07 |
| dyn. coefficient of friction lubricated1)2) |
EN 1337-2 | µ | n.a. | < 0,012 | < 0,02 |
| max. allowable pressure3) |
EN 1337-2 | N/mm2 | 20 | 30 | 45 |
1) At approx. 21°C, counter plate stainless steel Rz <1µm
2) Lubricated with silicon grease acc. to EN 1337
3) Load and recess of PTFE sheets according to EN 1337-2