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Processing of biodegradable products

Processing of biodegradable products makes very high demands on the compounding process because of the variety of possible base polymers and the great differences in the formulation mixtures. Every process step in a biodegradable products processing plant must be adapted exactly to the desired mechanical properties of the end product.

We have built up a comprehensive know-how for the processing of biodegradable products with numerous implemented plants. Our specialists also benefit from our years of experience in the fields of cooking extrusion and plastic compounding which we gathered under our former name Werner & Pfleiderer.

Our twin screw extruders are the heart of the processing plants for biodegradable products. The modular structure of the process section enables individual adaptation to every application so that optimal product qualities are achieved. Apart from the extruder, we also provide the entire plant periphery from the raw material feeding to pelletizing and drying of the pellets. Alternatively, it is possible to produce biodegradable products by direct extrusion.

Typical plant structure for the production of biodegradable products

Typical plant structure for the production of biodegradable products

Typical applications for the processing of biodegradable products

Plastics with granular starch as a biodegradable filler
Starch-based loose fill
Thermoplastic starch
Polylactide (PLA), PVOH, synthetic copolyester, PBS, PHA, PCL, CA
Compounds of various biomaterials
Compounds of plastics and biomaterials
Pelletizing of PLA, polymerization of PLA

Direct extrusion / In-line compounding

Direct extrusion / In-line compounding

Direct extrusion or in-line compounding enables the production of semi-finished products such as foils, plates, tubes or profiles in one work process – intermediate pelletizing is omitted completely. Coperion is considered a specialist for the production of direct extrusion plants.
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Article written by Uta Kühnen, Process Engineer for biodegradable products at Coperion