mi40 Visco is designed and developed with additional capability to perform measurements
according to the standard ISO 11443 which is commonly used for capillary rheometers.
Melt Flow Indexer / Melt Flow Index Tester, is also known as Plastometer, is instrument
used for measuring the value of melt flow index (MFR / MFI) in the unit of g/10min, and
the melt volume flow rate (MVR) in the unit of cm³/10min of thermoplastic polymer in the
form of pellets, powder or fine granules. Melt Flow Indexers are designed to perform tests
according to standards ISO 1133 and ASTM D1238
Performing measurement in a capillary rheometer is normally more challenging and time
consuming compared to a standardized MFR-test. Now GÖTTFERT had developed the special
Add-on "visco" option for mi40, which enable the running of these viscosity tests as
easy as the standardized melt flow index tests.
During the “visco” test mode, the mi40 instrument uses the integrated motor to push the
piston at constant defined speeds. The resulting pressure is measured with a force
transducer in the piston holder. Compared to normal MFR-measurements, it is possible to
reach higher shear rates which are more relevant for actual production processes.
Therefore, viscosity tests by this GÖTTFERT Melt Flow Indexers with visco add-on are
more like a processability test compared to the standard MFR-test.