Melt Flow Indexer (Plastometer), often known as Melt Flow Index Tester is used in the laboratory to measure the melt flow index (MFR / MFI) in the unit of g/10min and the melt volume flow rate (MVR) in the unit of cm³/10min of thermoplastic polymer in the form of pellets, powder or fine granules. The Melt Flow Index Testers are designed to perform melt flow rate testing according to EN ISO 1133 and ASTM D1238 standard. The testing instrument can be configured individually by means of various automated accessories and many options to adapt to applications.

Melt indexer with automatic weight selection can carry out tests according to ISO 1133 and ASTM D 1238, procedures B, as well as ISO 1133 and ASTM D 1238 procedure C for the “Half Height / Half Diameter” standard and procedure D for the FRR test (Flow Rate Ratio) and ASTM D 3364. Also the manual procedure A is possible to perform.

The IV Tester is to determine the intrinsic viscosity (IV), which is also called solvent viscosity (SV), without the use of chemical solvents. Intrinsic viscosity is used to characterize the average molecular weight of PET and PA-based polymers.