Standard Flat Belts

The wear resistance (abrasion) of the coatings is the factor that has the greatest influence on the service life of a belt.

There are two sets of internationally recognized abrasion standards: ISO 10247 (H, D L) and DIN 22102 (Y, W and X), with the DIN standard being the one in force.

Generally speaking, DIN Y refers to “normal” service conditions, DIN W to more abrasive materials and DIN X to resistance to cuts, impacts and abrasion resulting from large objects and heavy, sharp materials.

Of all the demands that conveyor belts are subjected to, temperature is often the most relentless and damaging.

High temperature environments accelerate the ageing process, which causes the rubber to harden and consequently crack.

The three types of resistance to accelerated ageing within the ISO 4195 methods are: Class 1 (100°C), Class 2 (125°C) and Class 3 (150°C).

Fire safety is such an important issue that there are different classifications and international standards for which different tests are used to measure performance.

The basis of most of these tests requires exposing a sample of belt to fire until it burns. When this happens, the burner (the flame) is removed and the burning time (flame duration) of the test piece (sample) is recorded. A stream of air is then applied under the sample for a set time after the flame has extinguished. The flame must not reignite. The combined duration (visible flame) should be less than 45 seconds for each group of six tests, with no individual value exceeding 15 seconds. The importance of this factor is critical, because it determines how far the belt can move in the fire.

Under laboratory test conditions, fire-resistant belts go out at an average permissible speed of 7.5 seconds.

Conveyed materials containing oil and grease can have a very detrimental effect on the performance and service life of a conveyor belt, as they penetrate the rubber, causing it to deform and begin to swell.

Oil resistance can be divided into two classes: mineral oil and vegetable/animal oil.

Slip belts are mainly used for transporting individual items and packages, but they are also used to transport a wide variety of materials.

Maferdi slider belts have a special rubber layer that provides the transverse rigidity needed to create the flat, even surface required for smooth, efficient operation. The low-friction polyester fabric used on the underside of the belt offers energy-saving properties.

Rough is also used on these belts to provide the surface grip needed to prevent slippage when dealing with steep slopes.