MFI is a simple measurement of the quantity of polymer pushed through a die of specified dimensions at a set temperature within 10 min. What is the use of melt flow index?ġ Melt flow index. The properties of a given polyethylene depend primarily on four factors: a. The range of grades available for MDPE and HDPE can cover densities from 0.940 to 0.965 g/cm3 and melt flow indices from 0.06 to 10 g/10 min. … Similarly, the test conditions of MFI measurement is normally expressed in kilograms rather than any other units.
The Melt Flow Index (MFI) is a measure of the ease of flow of the melt of a thermoplastic polymer. Lower material viscosity Melt Flow Indexer In general, a higher MFI indicates a lower material viscosity, and when comparing polymers of the same class, a lower melt flow rate corresponds to a higher molecular weight and/or less branching. Melt flow rate values are calculated in g/10 min. A timed extrudate is collected and weighed. A weight specified for the material is applied to a plunger and the molten material is forced through the die.
