Common Names: Natural Rubber
Chemical Name: Polyisoprene
ASTM D1418 Designation: NR
ISO/DIN 1629 Designation: NR
ASTM D2000/SAE J200 Type, Class: AA
Description: Natural rubber is the vulcanized product of the juice of the Hevea tree (latex).
Key Use(s): Mainly used for dampeners due to its ability to absorb vibration. Used for stoppers for cost and chemical compatibility. Most natural rubber still used for tires.
Standard Compound:-50°C (-58°F) to 70°C (158°F) – Dry Heat Only
Hardness (Shore A): 40 to 90
Features: Natural rubber features high tensile strength; high resilience, high abrasion and high tear resistance properties, with a good friction surface and excellent adhesion to metals. Natural rubber features good resistance to organic acids and alcohols, with moderate resistance to aldehydes.
Limitations: Not widely used in sealing industry due to poor compression set performance and lack of resistance to many fluids.