Tear Propagation Resistance

Significance and Test Method

The tear resistance, also called tear strength, shows how quickly a rubber material breaks completely after an initial tear. It depends on the shape of the test specimen, the pulling speed and the test temperature. It is given in N/mm.

Significance for Application Technology

This value is often used as a criterion for selecting materials for highly stressed rubber components.

Testing the tear propagation resistance

The tear propagation test is similar to a tensile test and is described in (DIN) ISO 34-1. This standard replaces the two withdrawn standards DIN 53 507 and DIN 53 515.

There are three possible methods of testing, which differ primarily in the geometry of the test specimens. It is possible to work with strip specimens or angle specimens according to Graves, with or without incision.