If a conveyor belt is not properly aligned, there is a chance that the belt runs against the side of the conveyor. This may lead to wearing of the belt's fabric at the side of the belt. With standard fabrics, it may be possible that fabric yarns are pulled out of the belt and are mixed into the product that is conveyed. In applications that require higher hygiene standards this is something that should be avoided at all times.
Frayless belts consist of fabrics with unique properties, even when the belts is heavily wearing on the side, there will no complete yarns be pulled out of the belt.
Want to level-up the hygiene standard even further? Then consider sealed edges or monolithic conveyor belts.