RUBBER
• Terminology
• Drawing Designation
• Compound Guide
• Performance Comparison
• General Applications

THERMOPLASTIC
• Performance Comparison





Guide to Rubber Compounds
NR - NATURAL
NBR - NITRILE
EPDM - ETHYLENE PROPYLENE
• Good low temperature properties and long flex life.
• High resilience, elongation and tensile strength, and wide hardness range.
• Poor resistance to ozone, heat, oil and general weathering.
• Resistant to attack from mineral oils, petroleum solvents, fair resistance to heat and aging.
• Relatively poor cold resistance.
• Cannot be used where weather resistance is required.
• Excellent resistance to weather and ozone.
• High tensile strength.
• Good low temperature properties.
• Resistant to non-flammable hydraulic fluids (Skydrol). Non-resistant to mineral oils.
CR - NEOPRENE
SILICONE
FKM - FLUOROELASTOMER
• Good heat, flame, ageing and weather resistance.
• Moderate chemical and oil resistance. Long flex life.
• Poor resistance to aromatic hydrocarbons.
• Excellent electrical properties, resistant up to very high temperatures and flexible to very low temperatures.
• Poor tensile and abrasion resistance compared to other elastomers.
• Excellent long term heat resistance and aging.
• Excellent hot oil, aliphatic and aromatic hydrocarbon resistance.
• Not very elastic.
• High cost polymer.
SBR
URETHANE
Viton®
• Non-Oil Resistant, economically priced synthetic rubber - especially noted for its low water absorption properties
• Outstanding tensile and abrasion qualities - excellent resistance to wear, ozone, oxygen, kerosene & gasoline
• In addition to its ability to withstand extreme temperatures, it is also fuel and oil resistant.
Viton® is a Registered Trademark of DuPont Dow Elastomers
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