Low yield and high energy use in plastic recycling rarely come from one bad machine. They come from stages that do not fit each other and from material that reaches the extruder in the wrong condition.
Where yield is lost
- Contamination reaching the melt: labels, paper, metal and other polymers block screens, cause downtime and leave defects in pellets. Better sorting, washing and separation upstream raise usable output.
- Moisture: wet material causes bubbles and brittle pellets. Drying before extrusion, and vacuum degassing on the extruder, prevent it.
- Unstable feeding: light film that feeds unevenly makes output and pellet size swing. Force feeding or compaction stabilises it.
- Wrong filtration: a screen changer sized for clean scrap stops constantly on post-consumer material.
Where energy is wasted
- Oversized or undersized stages: a crusher or washing line running far above or below the extruder’s needs wastes power and labour.
- Re-processing: every batch that has to be re-run because of defects doubles its energy use. Getting preparation right is the cheapest energy saving.
- Drying and heating: dry with the right equipment for the material, and keep the line running continuously rather than stopping and reheating.
Check before you buy
- Describe your material honestly — polymer, source, contamination and moisture.
- Ask for a line configuration, not a machine price.
- Check that washing, drying and filtration match your contamination level.
- Ask how the line handles a change in material.
We coordinate crushing, washing, separation, feeding, pelletizing and auxiliary equipment as one line for PP, PE and PET recycling. See our plastic recycling and granulation solutions and How to choose the right plastic pelletizing machine.
Next step
Send us a description of your material and your current line. We respond within one business day.