Hardness Range – An arbitrary numerical value that indicates the resistance to indentation (Shore A and P&J are examples of scales used to classify hardness).
Resistance to Denting – The ability of a roll covering to resist denting from a hard substrate's pressure.
Abrasion Resistance – The surface loss of material due to frictional contact of surfaces.
Tear Resistance – The measure of resistance to tearing or cutting under stress.
Load Bearing – The ability of material to withstand large loads without fracturing or tearing the roll covering.
Hysteresis – The difference between work input and work output in a cycle of extension and retraction. This can be measured by set, creep, stress relaxation, and heat build up.
Maximum Service Temperature – The temperatures at which a material can still perform and provide continuous service.
Ozone Resistance – Ozone attacks the polymer backbone of many elastomers. If it is not properly vented outdoors, it can cause problems with rolls in the plant.
Resiliency – A measure of a material's ability to dissipate energy and fully recover from deformation.