Physical properties of the POLY-MOR materials increase with density. Compressive strength Shear strength Flexural strength Tensile strength Within certain limits the POLY-MOR polymer demonstrates elastic characteristics. Hooke’s Law indicates that compression is proportional to the applied forces and will not exceed more than 2% – 10% in deviation. Only when force exceeds the elastic limit is the internal cellular structure permanently modified and will not recover its initial form. The elastic limit depends on the density of the material. The four diagrams below indicate the effect of density on its resistance to forces of compression, shear, bending and tension.