XNR-400C

I. purpose:

 

XNR-400C melt flow rate tester is an instrument to determine the flow performance of plastic polymers at high temperature according to the test method of gb3682-2000. It is used to measure the melt flow rate of polyethylene, polypropylene, POM, ABS resin, polycarbonate, nylon fluoroplastics and other polymers at high temperature. It is applicable to the production and research of factory enterprises and scientific research institutions.

 

2. Main features:

 

1. Extrusion part:

 

Outlet diameter: Φ 2.095 ± 0.005 mm

 

Outlet length: 8.000 ± 0.025mm

 

Diameter of charging barrel: Φ 9.550 ± 0.025mm

 

Charging barrel length: 152 ± 0.1mm

 

Piston rod head diameter: 9.475 ± 0.015mm

 

Piston rod head length: 6.350 ± 0.100mm

 

2. Standard test force (Grade 8)

 

Level 1: 0.325 kg = (piston rod + weight tray + heat insulation sleeve + 1 weight body)

 

=3.187N

 

Level 2: 1.200 kg = (0.325 + 2 0.875 weight) = 11.77 n

 

Grade 3: 2.160 kg = (0.325 + No.3 1.835 weight) = 21.18 n

 

Grade 4: 3.800 kg = (0.325 + 4 3.475 weight) = 37.26 n

 

Grade 5: 5.000 kg = (0.325 + 5 4.675 weight) = 49.03 n

 

Grade 6: 10.000 kg = (0.325 + 5 4.675 weight + 6 5.000 weight) = 98.07 n

 

Grade 7: 12.000 kg = (0.325 + 5 4.675 weight + 6 5.000 + 7 2.500 weight) = 122.58 n

 

Grade 8: 21.600 kg = (0.325 + No.2 0.875 weight + No.3 1.835 + No.4)

 

3. 475 + 5 No. 4.675 + 6 No. 5.000 + 7 No. 2.500 + 8 No. 2.915 weight) = 211.82 n

 

The relative error of weight mass is ≤ 0.5%.

 

3. Temperature range: 50-300 ℃

 

4. Constant temperature accuracy: ± 0.5 ℃.

 

5. Power supply: 220V ± 10% 50Hz

 

6. Working environment: the ambient temperature is 10 ℃ - 40 ℃; the relative humidity is 30% - 80%; there is no corrosive medium and strong air convection around; there is no vibration and strong magnetic field interference around.

 

7. Overall dimension of the instrument: 250 × 350 × 600 = (length × width × height)

 

III. structure and working principle:

 

Melt flow rate meter is a kind of extrusion plastic meter. It uses a high-temperature heating furnace to make the tested object melt under the specified temperature condition. The test object in this melting state is extruded through a small hole with a certain diameter under the load and gravity of the specified weight. In the plastic production of industrial enterprises and the research of scientific research institutions, "melt (mass) flow rate" is often used to express the physical properties of polymer materials such as fluidity and viscosity in the melting state. The so-called melt index refers to the average weight of each section of the extrusion sample converted to 10 minutes of extrusion.

 

Melt (mass) flow rate meter is expressed by MFR, unit: g / 10min (g / min) formula: MFR (θ, mnom)

 

=tref.M/t

 

Where: θ - test temperature

 

Mnom - nominal load kg

 

M -- average mass of cut-off G

 

Tref -- reference time (10min), s (600s)

 

T -- cut off time interval s