Natural Rubber

Natural Rubber, NR, is found in the juices of many plants but the principle source is from the Hevea Brasiliensis, a tropical tree. This is the product that all synthetic rubber types have tried to duplicate. It is generally resistant to most moderate chemicals wet or dry, organic acids, alcohols, keytones and aldehydes. It is generally attacked by ozone, strong acids, fats, oils, greases and most hydrocarbons. Typical applications are in tires, shock mounts, energy absorbers, seals, isolators, couplings, bearings, springs and other dynamic applications.

Properties and Characteristics

  • Specific Gravity: .93
  • Tensile Strength, psi – Reinforced: 4000
  • Practical Shore A Hardness Range: 30–95
  • Resilience, Room Temperature: Excellent
  • Resilience, Hot: Excellent
  • Tear Resistance: Excellent
  • Abrasion Resistance: Excellent
  • Atmosphere Aging Resistance: Poor
  • Oxidation Resistance: Good
  • Heat Resistance: Fair – Good
  • Low Temperature Flexability: Excellent
  • Compression Set: Fair – Good
  • Permeability: Fair
  • Flame Resistance: Poor
  • Acid Resistance – Dilute: Good
  • Acid Resistance – Concentrated: Fair
  • Moisture Resistance: Good – Excellent
  • Solvent Resistance Hydrocarbons: Poor
  • Oxygenated Solvents: Good
  • Oil and Gasoline: Poor
  • Animal and Vegetable Oils: Poor – Good
  • Dielectric Properties: Good – Excellent

REDCO's Properties of Rubber Chart

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