Bendable element with behaviour depending on the direction of rotation

摘要

The bendable part comprises a reinforcing layer (1) containing a fibrous reinforcing component with an E-modulus of 1800-20000 N/mm2, and an elastomer layer (2) with an E-modulus of 2-1300 N/mm2. The reinforcing/elastomer layer weight ratio is 1:99-40:60. Bending the part about an axis extending parallel to the reinforcing layer will increase the ratio of stiffness when bending in the positive direction to stiffness when bending in the negative direction by a factor of at least 1.2.