Rip & Impact resistance

In conditions where heavy, sharp lump sizes and/or large drop heights are involved, having a carcass that has been specifically designed to dissipate impact and provide strong resistance against trapped objects that can rip through the belt is very important. However, it is also essential to protect the carcass as much as possible with rubber covers that are best equipped to handle the impact, minimize rip & tear propagation and resist aggressive wear and the cutting and gouging caused by hard, sharp materials. For these kinds of demands, we recommend Dunlop cover grades RE, RS, and RES.


 

Dunlop Cover Quality


DIN quality


EN/ISO quality


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Technical Features


Dunlop RS

W

D

Outstanding resistance against impact, wear, cutting and gouging.

Average* abrasion resistance: 80mm³. Average* tear strength (N)/(Mpa): 125.6/15.7 (ISO 34-2).

Dunlop RE

X

H


Excellent resistance to impact, abrasion, cutting, gouging resulting from heavy, sharp materials and high drop heights.

Average* abrasion resistance: 106mm³.
Average* tear strength (N)/(Mpa): 144.8/18.1 (ISO 34-2).

Dunlop RES

W

D


Similar properties to RE but even greater wear resistance. RES has outstanding resistance against tear (rip) propagation.

Average* abrasion resistance: 78mm³.
Average* tear strength (N)/(Mpa): 136.0/17.0 (ISO 34-2).

 

* Dunlop actual performance averages presented above are achieved and recorded via our rigorous ongoing program of quality-testing.


Dunlop engineers have created a world-beating range of super-tough belts designed specifically for heavy-duty applications.

Click here to discover our High Impact / Heavy Duty Belts

USING BREAKER PLIES TO INCREASE RIP RESISTANCE

For heavy-duty applications where ply belting is used we recommend the unique Dunlop UsFlex as the most effective solution. However, for steelcord belting, we recommend that breaker plies are used. These are embedded in the rubber covers during the manufacturing process, effectively creating a protective layer. The breaker plies are designed to significantly increase resistance against longitudinal ripping and perform two distinct functions. Firstly, they can help prevent the penetration of the belt by trapped objects and secondly they act as a barrier if something does actually penetrate between the steel cords and starts to rip the belt.

READ MORE ABOUT THE APPLICABLE QUALITY STANDARDS & TEST METHODS


Download technical bulletin

In this link you will find detailed information about our range of breakers and their properties.

tearing test



Cover Qualities

Dunlop UsFlex®

In some applications, especially primary and secondary crushers, even the strongest and heaviest conventional belts can be ripped or torn by large lumps of heavy, sharp objects, either falling from a height or becoming trapped. In extreme cases, belts can be destroyed within a matter of weeks or months.