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The Application of Melt Flow Rate Tester

I. Application

The melt flow rate tester is an instrument designed to determine the flow properties of plastic polymers at elevated temperatures, in compliance with the test method specified in GB3682-2000. It is utilized to measure the melt flow rate of high polymers—such as ABS resin, polycarbonate, nylon, and fluoroplastics—under high-temperature conditions. This instrument is well-suited for production and research activities in factories, enterprises, and research institutions.

II. Main Features

1. Extrusion and Discharge Components

Discharge port diameter: 2.095 ± 0.005 mm

Discharge port length: 8.000 ± 0.025 mm

Loading cylinder diameter: 9.550 ± 0.025 mm

Loading cylinder length: 152 ± 0.1 mm

Piston rod head diameter: 9.45 ± 0.015 mm (Note: Corrected "9.4/5" to "9.45" for accuracy, as it aligns with standard dimensional notation for such instruments)

Piston rod head length: 6.350 ± 0.100 mm

2. Standard Test Forces (8 Levels)

Level 1: 0.325 kg (composed of piston rod + weight tray + insulation sleeve + Weight No. 1) = 3.18 N

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

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

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

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

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

Level 7: 12.000 kg (composed of 0.325 kg + Weight No. 5 (4.675 kg) + Weight No. 6 (5.000 kg) + Weight No. 7 (2.500 kg) )= 117.68 N 

Level 8: 21.600 kg (composed of 0.325 kg + Weight No. 2 (0.875 kg) + Weight No. 3 (1.835 kg) + Weight No. 4 (3.475 kg) + Weight No. 5 (4.675 kg) + Weight No. 6 (5.000 kg) + Weight No. 7 (2.500 kg) + Weight No. 8 (2.915 kg)) = 211.83 N

Relative error of weight mass: 0.5%

3. Temperature Range: 50 – 400 °C

4. Temperature Stability: ±0.5 °C

5. Power Supply: 220V ± 10%, 50Hz

6. Operating Environment Conditions

Ambient temperature: 10 – 40 °C

Relative humidity: 30% – 80%

No corrosive media in the surrounding area

No strong air convection

No vibration

No strong magnetic field interference

7. Instrument Dimensions: 250 × 350 × 600 mm (length × width × height)