The conveyor belt should have a certain strength, ensure the conveyor belt in the entire service life can bear the maximum operating tension. In general, the conveying belt safety factor of the system is 6-10, according to the type of transport of materials, dimensions, loading method, the conveyor belt conveyor belt links, installation and change. This means that the transport maximum working load belt for conveyer belt fracture strength of 10-15%. The loaded conveyor belt starts, especially at the load point, short peak may occur as a conveyor belt fracture strength of 20-30%. In order to make the drive roller and the conveyor belt between enough friction, belt pre equivalent to about 2% conveyor tension band fracture strength. Conveyor belt fracture strength (meridional) mainly depend on the type, the use of warp skeleton material quantity, at the same time by the fabric structure is also very important to.

Here we emphasize the concept of a so-called work of fracture, the area under the curve in the figure is the work of fracture. Conveyor belt fault causes are often short-lived peak, the impact caused by. To improve the transmission by the impact to the Kang tensile properties of belt, must improve the work of fracture.

The absolute intensity of canvas is important, but the work of fracture size material is more important.