What is a Melt Flow Index Tester?
A Melt Flow Index Tester measures the rate at which a polymer material flows through a die when subjected to controlled heat and pressure. The test involves heating the polymer to a specific temperature and applying a predefined weight or pressure to force the material through a small capillary. The flow rate of the polymer, measured in grams per 10 minutes, is known as the Melt Flow Index (MFI).
The MFI provides important data on the material’s viscosity, melt strength, and processability. Higher MFI values indicate lower viscosity, meaning the material flows more easily under heat and pressure, while lower MFI values suggest higher viscosity and less ease of flow.
The Importance of Melt Flow Index Testing in Polymer Industries: A Comprehensive Guide