One particular recycling challenge is posed by PP big bags, as they often contain unidentified foreign matter. Such abrasive residual matter as sand, glass or ceramics can increase wear and tear on the cutting unit.

Lightweight PP sheets require a washing technology similar to that used for plastic films. The plastic is processed in several steps, in which the material also undergoes a dynamic friction process. The LINDNER WASHTECH friction cleaners from the Twister series are a gentle yet highly efficient solution for thorough cleaning of highly-contaminated plastic waste.