Why are POLYSUR belts special?

Polysur is a brand of elevator belts from the Muller Beltex company (Netherlands), specializing in improving the efficiency and reliability of grain elevators, and Polysur belts are the company's flagship product.

Polysur is synonymous with high performance elevator belts that ensure smooth elevator operation under all conditions. The Polysur range includes standard rubber belts, oil- and fat resistant quality belts, anti-static and flame-retardant belts and food-grade quality belts.

But what unites all these belts, and what exactly makes them special?

The fact is that on a horizontal conveyor the movement of the belt with bulk material is facilitated by rollers, which significantly reduce the effect of gravity, reducing the required effective traction force for transportation.

But to lift bulk materials by elevator, the effective pull force must compensate for all 100% of the force of gravity acting on the transported material. Additionally, unlike a horizontal conveyor belt, an elevator belt is continuously stretched under its own weight 24 hours a day, even when the elevator is not in operation.

In summary, an elevator belt is constantly under significant tensile load and must be stronger than a standard conveyor belt. That is why Muller Beltex has developed specialized Polysur elevator belts, which feature an extremely strong belt structure.

Rubber belt has two important technical strength characteristics:

1) adhesion between plies of belts carcass,

2) adhesion between rubber covers and carcass plies.

If we look at the specifications of elevator belts from most European manufacturers, we’ll see that these characteristics are equal to 4-5 N/mm.

Why exactly these characteristics?

Because this is a requirement of the DIN 22102 standard. Clause 6.4 (“Resistance to separation”) requires an adhesion strength of 5 N/mm between the plies and an adhesion strength of 3.5-4.5 N/mm between covers and plies depending on the covers thickness.

As a result, most manufacturers repeat exactly these characteristics specified in the standard. However, engineers from Muller Beltex came up with their own vision of elevator belts and significantly exceeded the standard requirements!

In the specifications of any Polysur belt, the relevant characteristics are no less than 6 N/mm. This means they exceed the requirements of the DIN 22102 by 20% to 70%, which definitely increases the reliability and durability of the belts and the ability to perform under heavy loads!

In practice, the service life of Polysur belts is 2-3 times longer than the service life of standard elevator belts from other manufacturers.

Not to mention the comparison with belts of questionable quality, whose adhesive characteristics are not specified by the manufacturers (and there are quite a few of these on our market).

The reliability of Polysur belts is well known and for many Polysur has become the gold standard as these belts last significantly longer.

Now you know why Polysur specialty belts are better than others and how you can save money by choosing a reliable and durable Polysur elevator belt.