Plastic Recycling & Extrusion Systems for High-Quality Recyclate

A single-screw extruder can be a practical and economical choice for clean, homogeneous material when the main task is simple remelting or regranulation and there are no demanding requirements for mixing, additive incorporation, homogenisation or high-performance degassing. The final choice should be based on the actual material, required output quality and operating conditions.

A MAS twin-screw solution may be more capability than a project needs when the input is clean and consistent, no additives or fillers are required, degassing and homogenisation demands are low, and only simple regranulation is planned. A simpler extrusion route may then be more economical. A twin-screw route becomes more relevant when input quality fluctuates or the process requires intensive mixing, degassing, compounding or flexible material handling.

Cost depends on the required throughput, input material, contamination and moisture, preparation and cleaning needs, filtration fineness, degassing, additive dosing, pelletising, automation, densification and required final product quality. A simple regranulation line and a complete recycling or re-compounding system therefore have very different investment levels. MAS should define the process scope before giving a project-specific quotation.

Realistic throughput depends on polymer type, material form, bulk density, moisture, contamination, feeding stability, filtration load, degassing requirements and target pellet quality. A theoretical machine maximum is not enough for planning. The expected range should be confirmed from representative material data and, where necessary, a material trial.

A conical twin-screw extruder is not automatically the best or lowest-cost choice for every application. Projects with very simple, stable material may not need its feeding, mixing and degassing capabilities. Performance also remains dependent on correct preparation, filtration, downstream equipment and operating settings. MAS should compare alternatives and explain the technical and economic trade-offs for the specific material.

Testing should cover representative input material, contamination, moisture, bulk density, feeding behaviour, melt temperature, pressure, filtration behaviour, degassing, achievable throughput and final product quality. Depending on the application, evaluation may also include intrinsic viscosity, colour, odour, black spots, pellet consistency and additive response.

ROI should include more than machine energy consumption. Compare realistic throughput, kWh/kg, product quality, yield, rejects, labour, water use where relevant, wear parts, maintenance, downtime and the value of the final recyclate. All assumptions, material conditions and comparison periods should be stated clearly.

Yes. MAS can evaluate representative material and process requirements in its Technical Test Center. The test scope should be agreed in advance, including the input material, target output, required measurements and acceptance criteria. The results can support process selection and reduce uncertainty, but production performance still depends on the final line configuration and operating conditions.