Abrasion resistance
Urethane Elastomers offer outstanding durability when compared with rubber, plastics or even metal. In many applications the unusual combination of properties has made it possible to design and fabricate products from Urethane Elastomers using less material than has been possible with other elastomers.
Typical applications requiring Abrasion Resistance
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Chute Liners Cyclone and Cyclone Liners Conveying System Liners Duct Liners Pump Seals Rod Wipers |
Snow Plough Blades Pinch Valves Pulley and Sheave Liners Caster Wheels Industrial Tires Agitator Blades |
Pump Liners Hopper Liners Pallet Wheels Roller Skate Wheels |
Compressive properties
Cast Urethanes have greater load bearing capability than do conventional elastomers of equal hardness. As the hardness is increased, properties such as tensile strength, tear strength, compressive strength and tensile modulus are also increased.
High load-bearing capacity plus the unusual combination of hardness, resilience, solvent and oil resistance, in addition to abrasion resistance have been decisive factors in specifying these products for rolls and rollers.
Typical applications requiring compressive strength
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Graphic Art Rollers Fork Lift truck Wheels Conveyer Wheels Business Machine Rolls Squeeze Rolls |
Coating Rolls Forming Rolls Feed Rolls Gaskets and Seals Nip Rolls |
Rolls for Steel and Aluminum mills Transport Rollers Heavy Duty conveyer rolls Pulleys |
Mechanical properties
Great toughness combined with the many other outstanding properties associated with the high hardness Urethanes, leads to many unusual applications. Easily fabricated and machined gears are now being made from Castable Elastomers. Not only are they less costly to produce, they also provide smooth, quiet operation with minimum of wear and absolutely no corrosion problems.
Typical applications requiring mechanical strength
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Bumpers Shock Absorbers Bushings Bearings Wear Strips, Slide Plates Machine Parts |
Housings Escalator parts Car Wash rollers Couplings Fixture Blocks Grommets |
Hammers Striker Pads Wood-sorter pads Gears and Sprockets Balls for Pump Check Valves |
Electrical properties
Cast Urethanes have very good insulating properties and are used in many potting and encapsulating applications.
Moisture resistance
Urethanes are very resistant to the swelling and deterioration caused by moisture and have excellent long term stability in water up to 120ºF. Due to their nature however continuous use in hot water over 185ºF is not recommended.
Moisture absorption is normally very low, in the range of .3 to 2% by weight and the increase in volume (swell) is negligible. For example, Castable Urethanes can operate at close tolerance in Water lubricated bearings without fear of seizure.
Typical applications requiring moisture resistance
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Suction Rolls in Pulp and Paper mills |
Pump Liners |
Pump Impellers |
Mould Mildew and Fungus resistance
Polyether Polyurethanes do not support fungus growth and are highly resistant to such attack.