Polyurethane

Polyurethanes are manufactured by mixing polyols and isocyanates along with additives and curing agents. By adjusting formulations, its finished hardness can be altered from being very soft to quite hard and rigid. The mixture is then

poured into moulds or onto flat plates if sheets are to be made. The material is then heat cured to solidify and reach its final properties.

Polyurethanes are widely used in Industrial and Engineering applications due to their unique properties. Choosing the specific grade of hardness depends on the application. Soft grades such as 40 to 50 Shore A are quite flexible, allowing good cushioning, impact resistance and noise dampening. Medium grades 70 to 80 Shore A are a balance between flexibility and rigidity. Red coloured 90 Shore A is the most common and has been the Industry standard for decades.