Description
Natural Rubber, or NR, was the first commercially viable elastomer ever developed and is still the only non-synthetic rubber in widespread use. Natural rubber currently accounts for almost 40% of the world's elastomer consumption, as it is frequently blended with other rubbers to derive an ideal combination of properties. Derived from a liquid of the Hevea tree, NR latex is a low cost material that may contain relatively high levels of organic and inorganic impurities. It is ideal for applications that require good resistance to abrasion, gouging and cut growth. Also, because it experiences little heat buildup during flexing, it is also commonly specified when shock and dynamic load requirements are deemed critical. Natural rubber is tough, long lasting and can be compounded for service at temperatures as low as -65°F. It is also easily bonded to metal and fabrics.
Composition
Natural Rubber
Physical Properties*
| |
Excellent |
Good |
Fair |
Poor |
| Abrasion resistance |
• |
|
|
|
| Compression Set |
• |
|
|
|
| Elongation |
• |
|
|
|
| Flame resistance |
|
|
|
• |
| Gas permeability |
|
|
• |
|
| Low temperature flexibility |
• |
|
|
|
| Tear resistance |
• |
|
|
|
| Tensile strength |
|
• |
|
|
Chemical Resistance*
| |
Excellent |
Good |
Fair |
Poor |
| Air |
|
• |
|
|
| Alcohols |
|
• |
|
|
| Dilute acids and bases |
|
• |
|
|
| Gasoline |
|
|
|
• |
| Hydrocarbon solvents |
|
|
|
• |
| Oil |
|
|
|
• |
| Oxidation |
|
• |
|
|
| Ozone |
|
|
|
• |
| Radiation |
|
|
• |
|
| Steam |
|
|
• |
|
| Sunlight |
|
|
|
• |
| Water |
• |
|
|
|
Operating Temperature
-60 to 250 °F
*Excellent, good, fair and poor are intended to serve as general guidelines only. Actual testing in the application environment is always recommended. |