YYP-400E Melt Flow Indexer(MFR)

Short Description:

Applications:

The YYP-400E melt flow rate tester is an instrument for determining the flow performance of plastic polymers at high temperatures in accordance with the test method stipulated in GB3682-2018. It is used to measure the melt flow rate of polymers such as polyethylene, polypropylene, polyoxymethylene, ABS resin, polycarbonate, nylon, and fluoroplastics at high temperatures. It is applicable to the production and research in factories, enterprises and scientific research institutions.

Main technical parameters:

1. Extrusion discharge section:

Discharge port diameter: Φ2.095±0.005 mm

Discharge port length: 8.000±0.007 millimeters

The diameter of the loading cylinder: Φ9.550±0.007 mm

The length of the loading cylinder: 152±0.1 mm

Piston rod head diameter: 9.474±0.007 mm

Piston rod head length: 6.350±0.100 mm

2. Standard Test Force (Eight Levels)

Level 1: 0.325 kg = (Piston Rod + Weighing Pan + Insulating Sleeve + No. 1 Weight) = 3.187 N

Level 2: 1.200 kg = (0.325 + No. 2 0.875 Weight) = 11.77 N

Level 3: 2.160 kg = (0.325 + No. 3 1.835 Weight) = 21.18 N

Level 4: 3.800 kg = (0.325 + No. 4 3.475 Weight) = 37.26 N

Level 5: 5.000 kg = (0.325 + No. 5 4.675 Weight) = 49.03 N

Level 6: 10.000 kg = (0.325 + No. 5 4.675 Weight + No. 6 5.000 Weight) = 98.07 N

Level 7: 12.000 kg = (0.325 + No. 5 4.675 Weight + No. 6 5.000 + No. 7 2.500 Weight) = 122.58 N

Level 8: 21.600 kg = (0.325 + No. 2 0.875 Weight + No. 3 1.835 + No. 4 3.475 + No. 5 4.675 + No. 6 5.000 + No. 7 2.500 + No. 8 2.915 Weight) = 211.82 N

The relative error of the weight mass is ≤ 0.5%.

3. Temperature Range: 50°C ~300°C

4. Temperature Stability: ±0.5°C

5. Power Supply: 220V ± 10%, 50Hz

6. Working Environment Conditions:

Ambient Temperature: 10°C to 40°C;

Relative Humidity: 30% to 80%;

No Corrosive Medium in the Surroundings;

No Strong Air Convection;

Free from Vibration or Strong Magnetic Field Interference.

7. Instrument Dimensions: 280 mm × 350 mm × 600 mm (Length × Width × Height)

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Structure and Working Principle:

The melt flow rate tester is a type of extrusion plastic meter. Under specified temperature conditions, the sample to be tested is heated to a molten state by a high-temperature furnace. The molten sample is then extruded through a small hole of a specified diameter under the load of a prescribed weight. In the plastic production of industrial enterprises and the research of scientific research institutions, the “melt (mass) flow rate” is often used to represent the fluidity, viscosity and other physical properties of polymer materials in the molten state. The so-called melt index refers to the average weight of each section of the extruded sample converted to the extrusion amount in 10 minutes.

The melt (mass) flow rate instrument is denoted by MFR, with the unit being: grams per 10 minutes (g/min).

The formula is:

MFR(θ, mnom) = tref . m / t

Where: θ —- test temperature

Mnom— - nominal load (Kg)

m —- average mass of the cut-off, g

tref —- reference time (10 minutes), S (600s)

t ——- time interval of the cut-off, s

Example:

A group of plastic samples were cut every 30 seconds, and the results of the mass of each section were: 0.0816 grams, 0.0862 grams, 0.0815 grams, 0.0895 grams, 0.0825 grams.

The average value m = (0.0816 + 0.0862 + 0.0815 + 0.0895 + 0.0825) ÷ 5 = 0.0843 (grams)

Substitute into the formula: MFR = 600 × 0.0843 / 30 = 1.686 (grams per 10 minutes)