![]() Mixing with (high MFI) virgin polymers will reduce the risk of mechanical qualities. It is frequently used to compare grades of the same polymer, as it gives an indication of the molecular weight present in that batch or grade. 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.
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