Melt index meter (melt flow rate meter) is based on GB/T 3682 test method, used to determine the flow of thermoplastic polymers at high temperature, such as polyethylene, polypropylene, polyformaldehyde, ABS resin, polycarbonate, nylon fluoroplastics and other polymers.Xnr-400w melt indexer (melt flow rate meter) adopts industrial PLC programmable controller, touch screen operation platform display operation;The melt indexer (melt flow rate meter) automatic temperature control from the operation methods of manual, time control, automatic three cutting methods, can achieve the quality method (MFR) and volume method (MVR) two test methods, and equipped with a micro printer, can print test report;The melting index meter (melt flow rate meter) can measure the melting density of raw materials at the test temperature, and the system also has the function of temperature calibration.
Melt Flow Rate(MFR MVR) Meter Tester is used to make the measured objects reach the molten state with high temperature heating furnace under the specified temperature conditions.In this molten state, the measured material is extruded through a small hole of a certain diameter under a specified load.In plastic production, often used to represent the melt index polymer material in the molten state of fluidity, viscosity and other physical properties, the so-called melt flow rate is to extrude the average mass or volume of each section of the sample converted to 10 minutes of mass or volume.Melt flow rate can be expressed in the following two ways:
1.1. Quality method: expressed by MFR;
MFR = 600 x m present t
Where: MFR -- melt mass flow rate, g/10min;
M -- mean value of multi-segment samples, g;
T -- cutting time interval, s;
600 -- reference time (10min), s.
1.2 volumetric method: MVR;
MVR = 42.7 x l present t
Where: MVR -- melt volume flow rate, cm3/10min;
L -- predetermined measured distance of piston movement, mm;
T -- cutting time interval, s;
42.7 -- product of reference time (10min) and piston area.
Example: a set of plastic samples are cut into sections every 30 seconds. The weight of each section is:
0.0838 g 0.0862 g 0.0815 g 0.0895 g 0.0825 g
Mean value m= (0.0838+0.0862+ 0.0815+0.0895+0.0825) ÷5=0.0847 (g)
Substitute into the formula: MFR=600×m÷30=1.694 (g/10min)
That is, melt index is 1.694g/10min.
extrusion discharging part
diameter of discharge port: 2.095±0.005mm
outlet length: 8.000±0.025mm
inner diameter of feeding cylinder: 9.550±0.025mm
length of charging barrel: 160mm
diameter of piston rod head: 9.475±0.015mm
piston rod head length: 6.350±0.100mm
weight: standard test force (seven stages), with increasing loading
level 1 0.325kg= (piston rod + heat shield +1# weight) kg= 3.187n
level 2 1.200kg= (first class +2#0.875 weight) kg= 11.77n
level 3 2.160kg= (level 2 +3#0.960 weight) kg=21.18N
level 4 3.800kg= (tertiary +4#1.640 weights) kg= 37.26n
level 5.000kg= (4 grades +5#1.200 weights) kg= 49.03n
level 6 10.000kg= (grade 5 +6#5.000 weights) kg= 98.07n
level 7 21.600kg= (level 6 +7#2.500+8#4.100+9#5.000 weights) kg= 211.82n
Set any temperature control point within the range of room temperature ~ 450.0℃.
PID adjustment is adopted to reach the temperature control point in a short time.
digital display temperature, resolution 0.1℃, digital display time, minimum unit 0.1 second.
heating power: 450W
power supply: 220V±10%, 50Hz.
external dimensions of the instrument: 400mm×500mm×600mm.
instrument weight: about 40kg (excluding weights).
printing paper specification: 44X33mm