By using rubber qualities such as EPDM and EPM, the deterioration process caused by the influence of high temperatures can be limited. These rubber qualities stay flexible for longer and have a service life of many years. Several Polysur® versions are fully resistant to oils and greases, both mineral and vegetable. Very high concentrations of NBR rubber are used in these rubber mixtures, which counteracts hardening, swelling and blistering.
All Polysur® elevator belts are antistatic in accordance with DIN 22104(ISO 284). This means that the 3×108 Ohm standard is not exceeded.
Minimum elongation means that shortening the belt several times due to stretch can be avoided. In practice, Polysur®’s tightly woven EP fabric guarantees minimum elongation.
High adhesion prevents slipping and blistering and ensures that the rubber cover does not peel off. The rubber covers on the fabric and steel cord inserts in Polysur® elevator belts have extremely high adhesive properties and exceed the standard testing norm.
With 33% more polyamide weft threads in the EP fabric, Polysur® elevator belts are heavier and stronger transversely. As a result, the belts track better and are quieter when running. At the same time, the elevator buckets are more securely fastened to the belt.