A higher accuracy as well as a higher level of automatisation are key advantages of the Melt Flow Indexer mi40.
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.
Directly connected laboratory scale for determination of the melt density.
The residual moisture has a considerable influence on the measurement result for certain test materials. Therefore, it is recommended to dry test materials before a IV measurement and to determine the residual moisture.
The measuring head is mounted below the die. The measurement can be carried out parallel to a viscosity measurement.
Both our mi40 and MI-ROBO 89.16 can perform automated multi-load measurements with only one filling of...
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...
A Capillary Rheometer as well as a Melt Flow Indexer (Plastometer) can compare the flow behaviour of polymer plastics...
The determination of the melt flow rate (MFR) and the melt volume rate (MVR) is described in various international standards...
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...
The intrinsic viscosity (IV), also referred as intrinsic viscosity, or Staudinger index [η]...
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...
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.
All our melt index testers are equipped with a fast and precise temperature control...
