What is MFI melt flow index reducer masterbatch?

Masterbatch reducing the melt flow index (MFI) Polymer materials suffer quality loss and increase MFI due to successive processes, by adding certain percentages between one and five percent by weight to the raw materials, it reduces the MFI percentage and improves the properties of the polymer in The matrix is polyethylene. The material flow changer masterbatch is the same as the controller masterbatch (MFI).