Natural Rubber – NR (SMR)

Rubber is an organic substance, predominantly cis-1,4-polyisoprene, an elastomer (an elastic hydrocarbon polymer), which is obtained from certain tropical plants, mostly from rubber trees (Hevea brasiliensis), with the process of incising the bark of the tree, causing a milky-white latex sap to come out.

Rubber trees grow in large plantations in tropical areas. Latex is then refined into usable rubber. The pure form of natural rubber is therefore the chemical polysoprene, which can also be obtained synthetically.

Usage:

membranes, gloves, injection molded products of all kinds, tires.

Advantages:

• good tensile strength,
• elasticity,
• good wear resistance,
• flexibility when cold and excellent dynamic properties,
• good frictional properties,
• perfect binding with metal,
• mitigates vibration.

Disadvantages:

• Poor resistance to petroleum, oil, mineral oils, greases, ozone and UV radiation.

Temperature resistance: from -55 °C to 80 °C.

Hardness: 30 to 90 Shore A.