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Natutal
Rubber ( NR )
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Features:
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Abbreviation
NR
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ASTM D-2000
classification AA
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General
Characteristics
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Tensile Strength
Excellent
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Elongation
Excellent
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Rebound Resistance Excellent
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Tear Resistance
Excellent
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Abrasion-Resistance Excellent
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Impact Strength
Resistance
Excellent
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Gas Impermeability
Resistance Limited
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Ozone Resistance Poor
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Weathering Resistance Limited
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Flame Resistance Poor
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Heat Resistance Poor
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Low Temperature
Resistance Good
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Oil and Fuel Resistance Poor
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Animal and Vegetable Oil
Resistance Limited
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Alcohol Resistance Good
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Alkaline Resistance Limited
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Acid Resistance
Suitable
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Aliphatic-solvent Resistance
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-Aliphatic
Poor
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-Aromatic
Poor
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Oxygenated-Solvent
Resistance Good
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Water Resistance
Excellent
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Adhesion To Metals Poor
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Advantage:
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1. High resilience.
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2. Good compression set.
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3. Food roll building behavior
and molding properties.
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4. Good friction surface, but
not a fine smooth surface when ground.
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5. High tear strength.
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6. Low crack growth.
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7. Good low temperature.
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8. Usable for ketones and
alcohol.
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9. Good low temperature
properties.
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Disdvantage:
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1. Not recommended for oil and
solvent resistance and ozone attacks it.
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