The Dynisco LMI5500 Melt Flow Indexer can measure the IV of PET or RPET safely without the use of hazardous chemicals. This allows recyclers and processors to identify the IV of their PET and ensure the material is at the level required for their application. Knowing the IV and MFI can help to make critical adjustments to the process to ensure quality. When you know the MFI, you can adjust your process to ensure quality. This could be by adjusting the virgin/regrind ratios or adding an additive to the process to bring the regrind back into specification.

LMI5500 can also correlate with Dynisco's ViscoIndicator Online Rheometer, which can measure the IV every 15 seconds, allowing processors to adjust their drying systems to achieve the highest grade of PET available.

The ViscoIndicator can provide precise and continuous real-time MFI and IV data of extruded materials at the standard ASTM/ISO temperature, regardless of the processing temperature, by considering the temperature dependency of the melt flow behavior of plastic materials. It also allows processors in any manufacturing or recycling industry to consistently ensure quality by sending control signals to adjust production parameters based on the current rheology measurements in order to maintain polymer specifications.

The ViscoIndicator is also designed in a way that precisely duplicates the standard testing condition of melt flow rate testing. The ViscoIndicator provides the valuable plastics information of melt flow index or viscosity values. The common standards for melt flow rate testing are ASTM-1238 and ISO-1133, which determine standard conditions such as temperature and weight for a specific material. This passes the challenge of melt flow rate simulation in an online rheometer on to an extruder since the processing temperature can be different from that of standard ASTM/ISO temperatures in a melt flow rate tester.

For information on how Dynisco's laboratory and on-line rheometry equipment can help ensure quality and encourage sustainability on your process, contact us by clicking on the link to the right.

For more information on sustainability with Dynisco, return to the Sustainability home page, or explore how Dynisco contributes to global sustainability initiatives on the companion page.

For discussions on sustainability within the plastics industry, click on the link to the right to go to our Sustainability blog.