Instrument for determination of melt index and elongation viscosity in one measurement
The D-Melt measurement system enables the determination of melt index and elongation viscosity in one
measurement. The D-MELT instrument consists of a melt flow index tester mi40 and an integrated haul-off
system. This combination of equipment is particularly useful as a rapid test in quality control (QC) of
incoming materials for polymer processing.
The melt index measurement is an internationally standardized procedure for determining the flow property
of plastic melts. The sample is melted in a heated test barrel and then extruded through a capillary with
a test piston and a defined weight on top. Based on this, the MVR (melt volume rate) is determined in cm³/10min.
This value can be converted with the melt density value into the MFR (melt index) in g/10min.
In addition to the melt index testing, the D-MELT system, which is a combination of a mi40 Melt Flow Indexer
and a haul-off system, enables the determination of the elongational viscosity with just one measurement or
just one filling of the test barrel. To shield the HAUL-OFF from external influences during the test, it is
installed in a closed case below the mi40, which is easily accessible from the front via doors
This measuring process enables a quick, simple and cost-effective analysis of a quality parameter. This provides
information about the extrudability of a material. The defined value is ideally suited for the process control
of material manufacturers or for material processors when inspecting incoming goods in the QC laboratory.