TRU (also TPE-U)
Urethane-based TPE
TPU is the thermoplastic version of polyurethane (PUR).
Thanks to its good mechanical properties and excellent wear resistance, the material is often used in the automotive industry.
Compared to TPS, its chemical resistance is restricted to some extent.
Typical applications:
- Static and dynamic seals
- Vehicle trims
- Cable sheaths
Thanks to its good mechanical properties and excellent wear resistance, the material is often used in the automotive industry.
Compared to TPS, its chemical resistance is restricted to some extent.
Typical applications:
- Static and dynamic seals
- Vehicle trims
- Cable sheaths
Short designation | TPU (also TPE-U) |
Brand name | Elastollan® (Bayer) |
Chemical description | Urethane-based TPE |
Mechanical properties |
|
Hardness range [Shore A/D] | 60A – 80D |
Wear resistance | Very good |
Tensile strength [MPa] |
|
Physical properties |
|
Density [g/cm³] | 1.1 – 1.4 |
Application temperatures |
|
Temperature range, short-term [°C] | -50 – 120 |
Temperature range, continuous [°C] | -40 – 90 |
Other properties |
|
Flammability according to UL 94 | HB |
Chemical resistance |
|
Mineral grease and oils | + |
Petrol | - |
Weak/strong acids | o/- |
Weak/strong alkalis | +/o |
Perchloroethylene | - |
Trichloroethylene | - |
Acetone | - |
Alcohols | o |
Brake fluid | - (is dissolved) |
Hydrolysis resistance | - |
Weather/UV radiation | o |
+ resistant / o conditionally resistant / - not resistant