A plastic film washing line turns baled, contaminated PP and PE film into clean flake through eight modules in a fixed order — metered belt feed, pre-cutting to 60–80 mm, secondary crushing below 40 mm, a sink-float tank that drops everything denser than water, a sealed screw transfer, a high-speed friction washer, a screw press that brings moisture down to 5–8%, and a buffer silo that feeds the pelletizer. No polymer melts while contamination is still present. The order, not the individual machines, is what sets final flake quality.
Film is the most awkward feedstock in mechanical recycling. It is thin, it tangles, it traps water in every fold, and it arrives carrying far more non-plastic mass than a bottle bale ever does. The US EPA put the overall plastics recycling rate at 8.7% in 2018, with plastic containers and packaging at 13.6% — figures that show how much film still escapes recovery, and why line design matters commercially. This guide walks the flow module by module, then explains where PP and PE demand different settings on the same equipment.