Multi-Screw Compounding

Most materials today are compounded on multi- (usually twin-) screw compounding extruders. Most of these machines feature co-rotating, intermeshing screws, though there are applications in which counter-rotating, intermeshing or non-intermeshing machines are used. Extruders with more than two screws have been developed for applications requiring more intense devolatilization and reactive processing.

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Insights into plastics technologies from industry experts.

Compounding: Part 1 of 2: Demystifying Devolatilization
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Compounding: Part 1 of 2: Demystifying Devolatilization

Very little has been written about this critical topic, and most of what has been published is theoretical. Here’s some practical guidance to help you better understand the process and improve your operation.

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Why It's Crucial to Manage Melt-Temperature in a Twin-Screw Compounding Extruder

Managing and controlling melt temperature and degradation in a corotating compounding twin is critical to achieve process optimization. For compounders, it also greatly influences the ability of their molding and extrusion customers to make high-quality parts. Here are the results of research that illustrate this.