Conveyor belt bodies having a plastic material or having an upper plastic layer that typically has an elasticity module of between approximately 200 and approximately 900 N/mm2 , the bodies being coated by means of a plasma coating, especially in a plasma produced by microwaves or high frequency, whereby conveyor belts with covering layers are obtained. The covering layer provides the conveyor belts, for example, with increased chemical or scratch resistance or reduces the abrasion thereof. Suitable monomers for the plasma coating are, for example, tetrafluorethylene, 1, 2-difluorethylene, acetylene or hexamethyldisiloxane.