Rheometers & Melt Flow Testers

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Rheometers & Melt Flow Testers

Instron’s CEAST Rheology systems deliver the insight needed to understand how thermoplastics flow, deform, and perform during processing. By accurately characterizing melt‑flow behavior under realistic conditions, these instruments help you predict processability, fine‑tune formulations, and maintain high production standards. Whether you need fast, reliable melt‑flow data or advanced rheological analysis, our portfolio—from Melt Flow Testers to Capillary Rheometers—provides the right level of capability for every stage of development and quality control.

Capillary Rheometers

These bench top capillary rheometers are suitable for both Quality Control and Research & Development laboratories. Their two-column main frame construction guarantees maximum performance. With a velocity ratio of 1:500,000 corresponding to a piston speed of 0.0024 to 1200 mm/min, they perform tests with unlimited steps at constant shear rate or constant speed. Meets ISO, ASTM and equivalent standards.

Melt Flow Testers

The Instron® MFi Series of melt flow index testers are specifically designed for easy and accurate measuring of melt flow rate (MFR) and melt volume rate (MVR) according to Melt Flow Rate testing procedures determined by ASTM D1238 and ISO 1133 standards.

Out of Production Rheometers and Melt Flow Testers

All Instron Capillary Rheometers and Melt Flow Testers produced from 1998. These include CEAST Rheologic, Modular Melt Flow Tester, and more.