Viscosity measurements with a melt flow tester

GÖTTFERT melt flow index testers allow standardized test procedures to characterize the flowability of plastics at a defined temperature and constant force. The test methods for melt flow index measurements are defined in the test standards ISO 1133 and ASTM1228.

The melt flow tester mi40 can perform automated mulit-weight measurements as defined in ASTM D1238 Procedure D as standard. The flow rate ratio (FRR) is calculated from the results of the melt index measurement with different test weights. This ratio is a measure of molecular weight distribution and thus also of the shear-thinning behavior of the polymer relevant to processing.

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