Urethane Compound Specifications

Urethane Compound Specifications ​A successfully performing elastomer should be well documented by a meaningful specification. Why? Because hardness alone is not a reliable specification. At the same hardness we produce many compounds with widely different performance...

Designing Polyurethane Products

Designing Polyurethane Products The following steps in order yield the best approach to design and problem-solving. We encourage you to contact us for help every step of the way. Prioritize the properties that are necessary for performance in a given application....

Physical Constants of Urethane Elastomers

Physical Constants of Urethane Elastomers   Compound Specific Gravity Thermal Conductivity -32°F to +32°F (-35°C to 0°C) 32°F to 75°F (0°C to 24°C) 75°F to 212°F (24°C to 100°C) GC1085 1.08 .92 – 1.1 x 10-4 – GC1090 1.11 .92 1.4 x 10-4 .95 x 10-4 .95 x...

Polyurethane Stoichiometry

Polyurethane Stoichiometry Urethane Stoichiometry is the chemical relationship of the amount of reactive elastomer polymer to the amount of curing agent used. Selection of proper stoichiometry is our responsibility, it plays an all-important part in compression set...

Hysteresis in Urethane

Do you understand how hysteresis works? Let’s examine the compression-deflection curve for a given compound at a given shape factor and record the stress-strain relationship. As the piece is loaded, we arrive at one reproducible curve after three or four cycles. Now,...

Impact Shock Force Reduction with Polyurethane

A urethane bumper can be designed by equating the kinetic energy of a moving body to the total work the bumper does as it brings the moving body to a stop. The work done is represented by the area under the force-deflection curve. Unlike steel springs, the dynamic...

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