The tearing of rubber is caused by cracks or cracks in the material that rapidly expand and crack when subjected to force, leading to damage.
A: There is no direct relationship between tear strength and tensile:
    In many cases tearing and stretching are not proportional. In general, crystalline rubber has higher tear strength than amorphous rubber.
B: Tear strength is related to temperature:
    With the exception of natural rubber, the tear strength at high temperatures is significantly reduced. Carbon black and white carbon filled rubbers have significantly improved tear strength.
C: The tear strength is related to the vulcanization system.
    Polysulfide bonds have higher tear strength. High sulfur content, high tear strength. However, excessive sulphur content will significantly reduce the tear strength. The use of a good flatness promoter is beneficial to improve the tear strength.
D: The tear strength is related to the filling system:
    Various reinforcing fillers such as carbon black, white carbon black, white Yanhua, zinc oxide, etc., can obtain higher tear strength. Some coupling agents, such as citane, can increase tear strength. Softeners are usually added to reduce tear strength. Such as paraffin oil will make the tear strength of styrene-butadiene rubber extremely unfavorable. Aromatic oils have not changed much. For example, CM / NBR ester plasticizers have a much smaller impact than other softeners.