One of the major characteristics of the conveyor belts is oil and petrol resistance.This term refers to the ability of tapes for a long time to transport goods, including liquid mineral oils, oily foods, or "clean oil" (usually briquetted) with minimal swelling plates and boards.In some cases, in addition to oil resistance and heat resistance is required.For example, when hot asphalt laying machine with conveyer.
should remember that oil and petrol resistance conveyor belt less durable than tape, general purpose, since the strength of its coating rubber is much lower.Typically, the coating rubber for each selected oils (solvents, etc.) have been tested in the standard solution (a mixture of isooctane and toluene) are not always ensure safety belts in specific conditions.
reliability of oil and gasoline resistant tapes determined quickly enough - within the first 3-4 days of operation (maximum rate of swelling of rubber in the initial stage and then drops sharply).It is considered the most resistant to the "oil medium" - the conveyor belt with plates from PVC.
In the aquatic environment, including sea water, conveyor belts for general purpose and maslobenzostojkie completely reliable (swelling rubber is less than 2.5 - 3%).
Heat resistance - the ability to keep working tapes during transportation of hot cargoes.When the temperature influence of physical and mechanical properties of rubber and tissues deteriorate sharply (eg, bond strength when the bundle is reduced 2-fold at 100 ° C, the wear coating rubber is increased 2 - 2.5 times).And at a constant exposure to high temperature aging occurs ribbons, i.e.irreversible change in properties.For such applications, using special heat-resistant rubber with increased thickness of the plates (at least 6 mm), while the frame "establish" an increased safety margin - 15-20 times (for tapes of general purpose it is 8-10).
Keep in mind that the higher the contact area with the surface of the hot cargo liner, iethan he is "smaller", the tougher operating conditions and are less durable tape.Thus, we should apply the higher performance requirements of tapes.
Frost resistance - the ability of the conveyor belt to ensure the movement of goods at ambient temperatures from -60 ° C and above, iemaintain elasticity at rounding drum rolls, a "normal" form a tray.Use a general purpose tape under these conditions leads to profound impulses of the working electrode and the flattening of the frame on the conveyer.
Frost tapes provided by the use of special parietal and tie gum.Before mounting tapes in such circumstances, it is recommended they stand in a "warm" conditions (at least at + 6 + 8 ° C) for at least 12 hours.
