Designed for reliable extrapolation of process parameters from this unit to larger production extruders, the Evolum 25 R&D twin screw extruder from Clextral features screw and barrel designs which follow the same mathematical laws that govern the company's production twin screw extruders. This eliminates the guesswork associated with scale-up to production-model extruders. The benchtop unit offers a variable frequency drive, independent temperature control and easy access to component parts. It is equipped with a push-button barrel opening that allows immediate screw access for inspection.

Clextral Inc.; 813-854-4434; www.clextral.com

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• Clextral Inc.