Table 9.
Basic properties of the materials used for sealing purposes.
| Material | Density (kg/dm3) | Minimum Tensile Strength (MPa) | Minimum Service Temperature (°C) | Maximum Service Temperature (°C) | Description |
|---|---|---|---|---|---|
| THERMOPLASTICS | |||||
| PTFE | 2.2 | 17–28 | −200 | 250 | polytetrafluoroethylene |
| POM | 1.41 | 67–85 | −50 | 90 | polyoxymethylene |
| PE * | 0.91–0.94/ 0.95–0.98 |
7–17/ 20–37 |
−50/−50 | 75/80 | polyethylene |
| PE-UHMW | 0.94 | 38.6–48.3 | −150 | 90 | polyethylene (ultra high molecular weight) |
| ELASTOMERS | |||||
| PU | 1.45 | 20.7–96.0 | −60 | 90 | polyurethane |
| TPU | 1.2 | 30–40 | −40 | 80 | thermoplastic polyurethane |
| HPU | 1.19 | 49.2 | −30 | 110 | hydrolysis resistant polyurethane |
| NBR | 1.0 | 6.89–24.1 | −30 | 120 | nitrile butadiene rubber |
| HNBR | 1.23 | 21.7 | −30 | 150 | hydrogenated nitrile butadiene rubber |
| FPM/FKM | 1.8 | 9 | −35 | 220 | fluorocarbon rubber |
| MVQ | 1.5 | 6.4 | −60 | 200 | methylvinyl silicone rubber |
| EPDM | 1.1 | 17.4 | −45 | 125 | ethylene-propylene-diene monomer |
* Depending on the structure, a distinction is made between low-density PE (first value) and high-density PE (second value).