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Material properties of Elastomeres (rubber) |
| International symbol | NBR | CR | FPM | TPE | PUR |
| Brand name (e.g.) | Perbunan ® | Neoprene ® | Viton | SANTOPRENE® | Bayflex® |
| Chemical name |
Acrylonitrile- butadiene rubber |
Chloroprene rubber |
Fluorine rubber |
Thermoplastic rubber |
Polyurethane |
| Hardness [Shore A] | 25 to 95 | 30 to 90 | 65 to 90 | 55 to 87 | 65 to 90 |
| Temperature resistance |
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| short-term | 40 to +150 °C | 30 to +150 °C | 30 to +280 °C | 40 to +150 °C | 40 to +130 °C |
| long-term | 30 to +120 °C | 20 to +120 °C | 20 to +230 °C | 30 to +125 °C | 25 to +100 °C |
| Tensile strength (N/mm ( |
25 |
25' |
20 |
8,5 |
20 |
| Wear / Abrasion resistance |
good |
good |
good |
good |
excellent |
| Resistance to: | |||||
| Oil, grease | outstanding | good | good | good | very good |
| Solvents | good in part | good in part | very good | outstanding | satisfactory |
| Acids | restricted | good | very good | outstanding | not suitable |
| Caustic solutions | good | very good | very good | outstanding | not suitable |
| Fuels | good | slight | outstanding | good | good |
| General |
NBR is a synthetic special rubber for rubber parts with high requirements for resistance to swelling when in contact with oils and fuels. Standard material for O-rings. |
CR is one of the most frequently used synthetic rubbers with a wide range of applications for parts which require exceptional resistance to ageing, atmospheric and environmental influences. |
FPM is unmatched for applications with contact to fuels, oils, solvents, as well as many acids and caustic solutions; resistant to atmospheric and environmental influences. Due to its high price its use is restricted to high quality rubber parts which are exposed to extremely heavy wear. |
SANTOPRENE is a thermoplastic rubber, the performance characteristics of which are comparable to those of many customary vulcanised special rubbers. SANTOPRENE is a mult-purpose material with outstanding dynamic fatigue life and excellent resistance to ozone and atmospheric influences (environmental influences). |
PUR is known for exception- ally good mechanical characteristics with very good resistance to atmospheric and environ- mental influences. In addition, the extreme resistance to tearing and to wear, should also be mentioned. |
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