Plastic Film Densifier: Why Washed Film Should Be Densified Before Pelletizing
Washed plastic film is one of the most awkward materials in recycling: it leaves the washing line wet, fluffy, and so light that a cubic metre of it weighs less than a bag of cement. Feed it to a pelletizing extruder in that state and the screw starves, surges, and plugs. A film densifier exists to fix exactly that — turning washed film into dense, dry, free-flowing granules the extruder can actually eat. Here is what it does and how to choose a model. A screw densifier squeezes water out of washed film and converts it into dense granules in one pass. What a Screw Densifier Does to Washed Film Rumtoo's densifier design is built around a heavy-duty alloy screw working inside a slotted dewatering barrel, finished by a die-face cutter. Wet film enters; the screw compacts it and forces water out through the barrel slots under pressure — mechanical dewatering, not evaporation — while friction heat drives off residual moisture. The compacted material is then cut into granules by a ...