Calculation formula of
Melt Flow Index Tester for melt flow rate meter
Structure and working principle of
Melt flow index tester rate meter:
The melt flow rate meter of
melt flow index tester is to use a high-temperature heating furnace to make the measured object reach the molten state under the specified temperature conditions. The measured object in this molten state is extruded through a small hole with a certain diameter under the specified weight load gravity, and the mass of the extruded object is converted into the extrusion amount of 10 minutes. In the plastic production of industrial enterprises and the research of scientific research institutions, the " (mass)Melt Flow Index Tester flow rate" is often used to express the flow performance of polymer materials in the molten state. The melt flow rate of Melt Flow Index Tester is expressed by MFR in grams per 10 minutes (i.e. g / 10min)
Formula: MFR( θ. mnom)=tref × m/t=600 × m/t(g/10min)
Where: θ -- Test temperature
Mnom -- nominal load kg
M - average mass of material section, G
Tref -- reference time (10min): 600 seconds
T -- cutting time interval (unit: s).
For example, a section of material is cut every 30 seconds, and the mass of each section is 0.152 g, 0.153 g and 0.154 g respectively.
Average mass of material section M = (0.152 + 0.153 + 0.154) ÷ 3 = 0.153 (g)
Substitution formula: MFR = 600 × 0.153 / 30 = 3.06 (g / 10min)
