What is the tear resistance?

The tear propagation resistance indicates the force a rubber can exert against being pulled apart after the structure of the rubber has been weakened by an incision. The pulling direction is perpendicular to the incision. The unit is N/mm. There are two methods of determination. In the strip test according to DIN 53507, a cut, clearly defined strip is pulled apart in opposite directions. The force that must be applied is specified in N/mm, i.e. as a function of the specimen thickness. The angle test to Graves DIN 53515, on the other hand, uses an incised, angled specimen.