Inside a film bale,together with film,some HDPE and PET bottles can be found, (which can be handled quite easily) some PS trays not easy to remove by sink-float tanks but, the most difficult and messy materials are sponges, all kind of foamed materials and last but not least, cleaning pads, a piece of cloth, some cotton fabric and scraps like these.

Manual sorting is compulsory ,and, if this is combined with NIR detection system sorting efficiency will improve.