Tension and Compression Comparisons: Most rubber materials have high elongation but low tensile strength.
To obtain greater tensile strength in rubbers, fillers are added with a resultant loss in its ability to elongate. K•Prene® has both high tensile stress properties and high elongations, even in the harder grades. K•Prene® has far greater load bearing capacity than do conventional elastomers of comparable hardness which is an important advantage in many areas such as metalworking dies, shock mounts and springs.
K•Prene® has a far greater load-bearing capacity than do conventional elastomers of comparable hardness, which permits the design of smaller parts with savings in weight and material cost. The graph (to the right) compares the compressive stresses required to deflect samples of the four standard grades of K•Prene® by up to 50%. When selecting K•Prene® urethane for certain applications such as metal forming, major consideration should be given to two factors: Shape Factor and the Modulus of Elasticity.