Melt Index Tester Operation Procedure

The Melt Index Tester is used to characterize the flow properties of thermoplastic polymers in a viscous flow state and to measure the melt mass flow rate (MFR) and volume flow rate at the melt flow rate. melt state (MVR) of thermoplastic resins. It is suitable for melting temperature High engineering plastics such as polycarbonate, nylon, fluoroplastic, polyarylsulphone, etc. also suitable for non-woven fabrics, melt-blown fabrics, polyethylene, polystyrene, polypropylene, ABS resin, polyoxymethylene resin, etc. Low material testing, Qisnun Precision Electromechanical Technology Co., Ltd. is the manufacturer.

Applicable standards:

GB/T3682, ISO1133, GB/T9643, JB/T5456, ASTM/D1238-98

Main parameters:

1. Extrusion discharge part

Diameter of discharge port: Φ2.095±0.005mm, length of discharge port: 8.000±0.025mm;

Charging barrel diameter: Φ9.550±0.025mm, charging barrel length: 152±0.1mm;

Diameter of charging rod head piston: 9.475±0.015mm, piston rod head length: 6.350±0.100mm;

2. Standard test load (a total of 8 weight levels);

3. Temperature range: normal ambient temperature - 400°C (500°C optional);

4. Constant temperature accuracy: ±0.5°C;

5. Display resolution: 0.1°C;

6. Cutting method: manual or automatic cutting is optional;

7. Temperature recovery time: less than 4 minutes.

Operation procedure:

01. Turn on the power, turn on the power switch, the green power indicator light is on and set the test temperature, the red light is on when heating.

02. Standby for 20 minutes, that is, the temperature pradjusted is stable before starting work.

03. Sample preparation, weigh 4-5g on the balance and prepare the sample for testing.

04. Add material, when the temperature is stable, you can add material. Take out the material rod, lightly place it on the high temperature resistant object, insert the funnel into the material barrel, vibrate the funnel while feeding, so that the material can flow out quickly. After feeding, use the pressing rod to compact the material to reduce air bubbles, then insert the feeding rod, place the positioning sleeve, and place it on the weight plate (the operation of feeding should be completed within one minute).

05. After feeding is complete, preheat for 4-6 minutes, add required weight, and prepare for cutting and sampling.

06. When the rod goes down to the lilower cue line, begin the timed cut. drop to superscriptThe test stops when the line is marked. The cutting sample must be between the upper and lower marking lines of the rod.

07. The cutting interval of each spline is determined according to the object to be measured. Generally, it is cut every 60 or 30 seconds. The length of each spline is usually about 20mm---50mm.

08. Select and weigh the splines, discard the splines with visible air bubbles, weigh the remaining splines (at least three) one by one, and calculate the average weight with an accuracy of 0, 0001 g.

09. Calculate the result and find the fluidity index.

10. When the test is complete, clean the rod, cylinder and die with clean gauze while still warm for the next test.

11. After cleaning, put on the power rod, turn off the power switch.power and turn off the power.

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