A tool for determining the flow characteristics of thermoplastic materials is a melt flow index tester. It extrudes a molten sample through a die with predetermined dimensions while applying a constant load to it. The viscosity of the material is indicated by the flow rate, which is important for quality control in the production of polymers. Original Posted on: hhttps://www.perfectgroupindia.co.in/exploring-the-science-of-melt-flow-index-tester.php