The questions asked are not accurate. What you mean should be the maximum elasticity that can be achieved under normal use (just guessing).
The elasticity of the overall performance of the conveyor belt is determined by the skeleton material of the conveyor belt, the cover rubber and the glue, and mainly depends on the skeleton material.
The elongation at break is the maximum tensile force that is taken when the conveyor belt is pulled off.
The overall elasticity and elongation of conveyor belts of various types and models are different. I can give you the corresponding model.
The difference in the elongation of the ring conveyor belt
The conveyor belt is made into a jointless ring conveyor belt during the production process. It is characterized by no joints, no impact on the service life due to early damage of the joints, smooth surface of the tape and uniform tension, so the tape runs smoothly and is used. The elongation is small.
The endless belt will stretch during use, and part of it will be elastically stretched and will return to its original state after the external force is removed. In the common fabric core conveyor belt, the elongation of the EP conveyor belt is relatively small, the elongation of the NN conveyor belt is relatively large, and during use, the NN conveyor belt has a relatively large creep due to the force of the nylon fiber, so during use The elongation ratio is increased, and because of the creep of the fiber, the amount that can be shrunk back is much smaller than the elongation after the external force is removed.