Natural Rubber (NR)
Abbreviation:
NR
ASTM D-2000 Classification:
AA
Chemical Definition:
Polyisoprene
Physical & Mechanical Properties
- Durometer or Hardness 30 - 95 Shore A
- Tensile Strength 200 - 3500 PSI
- Elongation % 300% - 900%
- Abrasion Resistance Good to Excellent
- Adhesion to Metal Excellent
- Adhesion to Rigid Materials Excellent
- Compression Set Excellent
- Flex Cracking Resistance Excellent
- Impact Resistance Good to Excellent
- Resilience/Rebound Excellent
- Tear Resistance Good to Excellent
- Vibration Dampening Good to Excellent
Thermal Properties
- Low Temperature -20° F to -70° F
- Minimum for Continuous Use (static) -60° F
- Brittle Point -80° F
- High Temperature +180° F to 220° F
- Maximum for Continuous Use (static) +180° F
Environmental Performance
- Colorability Poor
- Flame Resistance Fair to Good
- Gas Permeability Fair to Good
- Odor Good to Excellent
- Ozone Resistance Poor
- Oxidation Resistance Good
- Radiation Resistance Fair to Good
- Steam Resistance Good
- Sunlight Resistance Poor to Fair
- Taste Retention Fair to Good
- Weather Resistance Poor to Fair
- Water Resistance Excellent
Chemical Resistance
- Acids, Dilute Fair to Excellent
- Acids, Concentrated Poor to Good
- Acids, Organic (Dilute) Fair to Good
- Acids, Organic (Concentrated) Good
- Acids, Inorganic Good
- Alcohols Good to Excellent
- Aldehydes Good
- Alkalies, Dilute Fair to Excellent
- Alkalies, Concentrated Fair to Good
- Amines Poor to Fair
- Animal & Vegetable Oils Poor to Good
- Brake Fluids, Non-Petroleum Based Good
- Diester Oils Poor
- Esters, Alkyl Phosphate Poor
- Esters, Aryl Phosphate Poor
- Esters Poor
- Fuel, Aliphatic Hydrocarbon Poor
- Fuel, Aromatic Hydrocarbon Poor to Fair
- Fuel, Extended (Oxygenated) Poor
- Halogenated Solvents Poor
- Hydrocarbon, Halogenated Poor
- Ketones Fair to Good
- Lacquer Solvents Poor
- LP Gases & Fuel Oils Poor
- Mineral Oils Poor
- Oil Resistance Poor
- Petroleum Aromatic Poor
- Petroleum Non-Aromatic Poor
- Refrigerant Ammonia Good
- Refrigerant Halofluorocarbons R-12, R-13
- Refrigerant Halofluorocarbons with Oil Poor
- Silicone Oil Good
- Solvent Resistance Poor
