How does the capillary rheometer differ from a melt indexer?
Traditionally, the melt flow indexer (MFI) has been the instrument of choice for quantifying melt flow properties in the plastics industry. MFI machines are typically inexpensive and easy to operate. They require a minimum of expertise to interpret the results, which more often than not is a single value. The basic test uses a single dead weight to record the amount of material extruded over a fixed period of time. As a result, the MFI quickly became the de facto standard in the plastics industry.
