The melt index measurement is an internationally standardized procedure, which is used to determine the flowability of polymer melts. The sample is plasticized in a heated test barrel and afterwards extruded through a capillary with a test piston and a defined weight on top. Meanwhile the MVR-value (melt volume-flow rate) is calculated form the feed rate of the test piston. With the melt density it can be converted to the MFR-value (melt mass-flow rate) in g/10min.
The D-MELT makes it possible to also determine the MElt Elongation value (ME-value), a measure of the melt elasticity. Both measurements, ME and MVR, are done with just one filling of the test barrel. The ME-measurement is completed before the start of the standard-confirming MVR-measurement.
The ME-value is the force in the extruded strand at a certain draw-down ratio. This new combined method realizes the opportunity to determine a significant characteristic value of the extrusion behavior of your product in a quick, easy and cost-effective way. The D-MELT system and the ME-value are therefore ideal for continuous process monitoring or the inspection of incoming goods.
Measurement of flow and extension properties using a melt index tester (Plastometer)