Resistance to Water, Oil & Grease
Polyurethane's material properties will remain stable (with minimal swelling) in water, oil and grease. Polyether compounds have the potential to last many years in subsea applications.
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Electrical Properties
Polyurethanes exhibit good electrical insulating properties.
Wide Resiliency Range
Resilience is generally a function of hardness. For shock-absorbing elastomer applications, low rebound compounds are usually used (i.e. resilience range of 10-40%). For high frequency vibrations or where quick recovery is required, compounds in the 40-65% resilience are used. In general, toughness is enhanced by high resilience.
Strong Bonding Properties
Polyurethane bonds to a wide range of materials during the manufacturing process. These materials include other plastics, metals and wood. This property makes polyurethane an ideal material for wheels, rollers and inserts.
Performance in Harsh Environments
Polyurethane is very resistant to extreme temperature, meaning harsh environmental conditions and many chemicals rarely cause material degradation.
Mold, Mildew & Fungus Resistance
Most polyether based polyurethanes do not support fungal, mold and mildew growth and are therefore highly suitable for tropical environments. Special additives can also be added to reduce this in polyester materials as well.
Color Ranges
Varying color pigments can be added to polyurethane in the manufacturing process. Ultraviolet shielding can be incorporated into the pigment to provide better color stability in outdoor applications.
Economical Manufacturing Process
Polyurethane is often used to manufacture one-off parts, prototypes or high volume, repeat production runs. Size ranges vary from a couple grams to lb parts.
Polyurethane (PU) was invented by Professor Dr. Otto Bayer in the year used to replace rubber. It is a very versatile elastomer or artificial rubber. Properties of polyurethane can be manipulated through chemistry, allowing them to take on a multitude of unique qualities. Polyurethane appears in a large number of our everyday household items and machinery.
As given in Wikipedia, Polyurethane chemical is widely used in high resiliency flexible foam seating, rigid foam insulation panels, microcellular foam seals and gaskets, durable elastomeric wheels and tires, automotive suspension bushings, electrical potting compounds, seals, gaskets, carpet underlay, and hard plastic parts (such as for electronic instruments).
Polyurethanes or PU Chemicals are formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives.
Abrasion resistance is high
High cut & tear resistance
Superior load bearing
Thick section molding
Colorability
Oil resistance
Ozone resistance
Radiation resistance
Broader hardness range
Castable nature
Low-pressure tooling
Lightweight
Noise reduction
Abrasion resistance
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Less expensive fabrication
Corrosion resistance
Resilience
Impact resistance
Flexibility
Easily moldable
Non-conductive
Non-sparking
High impact resistance
Elastic memory
Abrasion resistance
Noise reduction
Variable coefficient of friction
Resilience
Thick section molding
Lower cost tooling
Low-temperature resistance
Cold flow resistance
Radiation resistance
Furniture
Thermal Insulation
Elastomers
Footwear
Straps
Coatings
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