mi40

A higher accuracy as well as a higher level of automatisation are key advantages of the Melt Flow Indexer mi40.

  • ISO 1133
  • ASTM D1238
  • ASTM D3364

The new generation of melt index measurements is embodied by the mi40 from GÖTTFERT. Users in incoming goods and quality control (QC) departments experience the advantage of an automated and more accurate determination of MFR (Melt Flow Rate) and MVR (Melt Volume Rate) according to ASTM D1238 and ISO 1133.

The mi40 combines all the advantages of the MI-3 with a higher degree of automation. The drive can be used for force-controlled pre-compression or ejection or remaining material with a total force of up to 60 kg. The automatic test-plan-controlled weight selection with up to nine integrated weights simplifies operation considerably. The automatic pre-compression with weight or drive reduces operator influence on the measurement result. Fully automatic multi-weight-measurements with up to eight different weights per barrel filling can also be performed.

Due to the high-precision displacement measurement, even very low or very high MFR/MVR-values can be recorded with high precision. The external piston guidance on the guide rod of the test weight makes it possible to measure even very sticky materials with high repeatability.

Our experience shows that cleanliness has an extremely large influence on the precision and accuracy of melt index measurements. For this reason, the test chamber with exchangeable test barrel can be swivelled out and is therefore particularly convenient to fill and clean. The optional integrated semi-automatic cleaning device makes cleaning even easier.

The basic version of the mi40 plastometer can perform MFR or MVR measurements according to ISO 1133 Procedure B and ASTM D1238 Procedure B. Multi-weight-measurements to calculate the FRR (Flow Rate Ratio) according to ASTM D1238 Procedure D are also possible.

With an optional melt cutting device, the measurement results can also be evaluated according to ISO 1133 Procedure A or ASTM D1238 Procedure A. With special capillaries, measurements can also be performed according to ASTM D1238 Procedure C ("half-die") or ASTM D3364.

The mi40 can also be combined with various add-ons. For example, the "viscosity measurement" add-on turns the mi40 into the mi40 visco - a capillary rheometer. This makes it possible to carry out viscosity measurements in accordance with ISO 11443. In combination with an elongational rheometer the mi40 becomes the D-MELT. In a single test, both the MFR and the MF, a key figure for the extensional viscosity, can be determined

Highlights
  • Force controlled pre-compression / ejection via drive with a force of up to 60 kg
  • Multi-load tests with up to 8 different weights in any order
  • Time measurement accuracy better than 0.001 s
  • Temperature control algorithm, resolution 0 to 320°C: 0.01°C, 320 to 500°C: 0.1°C
  • Precise digital displacement measurement with automatic resolution determination
  • Swing-out test chamber design for convenient filling and cleaning
  • External piston guidence
  • Integrated magazine with up to nine test weights from 0.325 kg to 21.6 kg with automatic selection
  • Other test weights available on request
Optional Units
  • Integrated electrical cleaning device
  • Manual capillary plug (special heated version for high temperatures available)
  • Automatic capillary plug
  • Automatic or manual melt-cutting unit (even for very sticky materials)
  • Nitrogen purge for hydroscopic materials
  • Alternative steel grades for barrel and piston with higher corrosion or abrasion resistance
  • Data protection of parameters and results via uninterruptible power supply
  • Inlet-version for extremely sticky powders
Add-on

GÖTTFERT melt indexers come with different options. Furthermore, we also provides add-ons, which are extending the functionality of the device. The following add-ons are available:

Applications

Multi-Load-Measurements

Both our mi40 and MI-ROBO 89.16 can perform automated multi-load measurements with only one filling of...

 

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mi40 visco: Viscosity measurements on a plastometer

With the add-on "viscosity measurement" the mi40 is transformed into a mi40 visco. This enables the plastometer to perform viscosity measurements according to the standard for capillary rheometers ISO 11443...

 

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Melt Flow Indexer (MFR/MVR) vs. Capillary Rheometer

A Capillary Rheometer as well as a Melt Flow Indexer (Plastometer) can compare the flow behaviour of polymer plastics...

 

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MFR-Standards: ISO 1133 and ASTM D1238

The determination of the melt flow rate (MFR) and the melt volume rate (MVR) is described in various international standards...

 

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MFR/MVR: Common Terms

Over the years, quite a number of different terms have become established in the field of melt flow measurements, often with the same or similar meanings. This sometimes leads to misunderstandings and the whole subject area seems more complicated than it actually is...

 

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Intrinsic Viscosity

The intrinsic viscosity (IV), also referred as intrinsic viscosity, or Staudinger index [η]...

 

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Determination of Melt Flow Index (MFR and MVR)

The melt flow index is a standardized test method to determine the flow rate of plastics at a defined temperature and constant force. The test method...

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Reproducible and Accuracy of Melt-Index-Tests

GÖTTFERT Melt Flow Testers (Plastometers) are manufactured according to the most modern electronic and mechanical standards with minimal manufacturing tolerances. The result is a testing device which delivers precise and accurate MVR and MFR test results.

 

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Better than ISO 1133

All our melt index testers are equipped with a fast and precise temperature control...

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