The PET-Recycling-Unit is used where several sizes of disposable PET-bottles need to be economically compacted. The the volume of the material is reduced with a baling press or a container. Due to effective compaction, transport and storage costs can be saved. When compacting PET-bottles with baling presses, the PRM is essential, because air can escape through the gaps in the bottles, enabling the bales to stick together. The PRM unit does not need the cutting or slot system, or a spike roller. This is a huge advantage, because the wear-and-tear and maintenance costs are kept very low. In the presence of rigid contaminants, like wood or metal parts, the press roll swings out so these materials fall through without damaging the PRM. At the end of the process high bale weights can be achieved due to perfectly compacted material.