What is the difference between smooth mono-material belts and positive drive belts?

Smooth mono-material belts guarantee an optimum level of hygiene thanks to their perfectly smooth upper surface that makes cleaning easy. However, they drive under tension, but this in no way eliminates the risk of slippage in oily and wet conditions.
A Positive belt drive doesn’t rely upon drive through tension on pulleys but through the physical engagement of drive teeth on toothed pulleys.
This system eliminates any risk of belt slippage, even in oily conditions. Positive drive belts do not require tension mounting and offer a perfectly smooth upper surface guaranteeing an optimum level of hygiene.
Therefore, positive drive belts have all the advantages of mono-material smooth belts without the risk of slippage, even in oily, wet conditions.

> More details in the positive drive belt section