Detailed Product Description Standard: ASTM D 1238, ISO 1133 and others XRL-400 series of Melt Flow Index is used to determine melt-mass flow rate (MFR).melt-Volume flow rate (MVR) and melt density of thermoplastic resin.it is applicable not only to the higher melting temperature, such as polycarbonate, nylon, Fluoroplastics, poly oxide and other engineering plastics, and it also applies to ...