Melt Flow Index Tester- Best to Analyze Plastic Quality

Reviewed by Anurag Mishra (Sr. Technical Consultant)

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A melt flow index rate is a measure of the flow of plastics. Melt flow index rates are very important because they help to determine the physical properties of polymers, like their hardness, stiffness, durability, and flexibility. The higher the melt flow index rate for a polymer, the better its performance in terms of mechanical strength. Melt flow rate is important because it dictates the extrusion process. The lower the melt flow rate, the more viscous or elastic a polymer will be. This amount of time before the polymer starts to release from its mold determines how quickly you can start production with that material. A higher melt flow rate means faster production rates for your product and less waste in any molds while running an extruder. Thus, with the help of the Testronix Melt Flow Index Tester, you will be able to measure the melt flow rate of polymers with ease. Here in this blog, we are going to provide you with the information about Testronix melt flow index tester and how it is helpful in analyzing the quality of plastics.

What is MFI or melt flow index tester?

Testronix Melt Flow index tester is a very advanced machine that is used for testing the melt flow index of different types of plastic with great accuracy. Thus, you can make use of a Testronix melt flow index tester to test the quality of the plastic granules that are being used for molding plastic products. This quality control testing instrument can be used in various industries to measure how quickly material melts when heated. By determining the melt flow index value, you will be able to assess the different properties of polymer and plastics. The Testronix MFI tester comes with a High heating capacity from ambient to 400 0 C. It also has a pre-settable digital timer for selecting the test cycle time for sample cutting. You will also get an advanced PID controller for effective temperature control with the help of the Testronix MFI tester.

Here we have listed the specifications for the Testronix manual model of the MFI tester:

  • Display: LED (Digital)
  • Temperature Range: Ambient to 400°C.
  • Accuracy: ± 0.1°C.
  • Resolution: 0.1°C.
  • Least Count: 0.01gms.
  • Dimensions of piston head: 9.47mm diameter ± 0.007mm
  • Diameter of heater tube cavity: 9.55mm ± 0.007mm
  • Dimensions of Die: 2.095mm ± 0.005mm
  • Weights:2.16 kg & 3.8kg included (Additional on Request)
  • Power Supply: Single Phase, 220-240 AC, 50 Hz.
  • Powder Coated body

Thus, with the help of this testing instrument, you will be able to determine how quickly plastic flows under heat and pressure and how well it will stand up to stress during manufacturing and shipping as well. You will be able to determine the viscosity of polymers, such as plastics or elastomers, and can help with selecting which materials are appropriate for different purposes.

How to use Testronix Melt Flow Index Tester?

When you purchase the Testronix MFI tester, then you will be guided through the instruction manual as well as the technical staff. But, to ease your process of testing the melt flow index of polymers and plastics, you can easily read the working of this testing instrument.

To start with the test, you should first do leveling of the machine. To determine the leveling of this testing equipments, you can make the use of plumb line provided with the machine. Take out the orifice die from the machine and insert the plumb line inside the barrel. If the plumb line is perfectly perpendicular to the ground, this means the machine is perfectly leveled.

After that, you can operate the machine by setting it manually. In this case, you need to cut the granules manually with the manual cut button given in the control panel. This can be done with the help of a toggle switch on the control panel. After setting the temperature and timer, turn the heater on by pressing the heater on the switch. Wait for the reading in the PV display in the PID controller to reach the value of the SV display. After the required temperature for the test has been attained, fill the barrel of the machine with the plastic granules you want to test. In this way, you can easily test the specimen and determine its MFI rate.


The Testronix Melt Flow Index Tester is a great instrument to analyze the quality of your plastic. The MFI tester is highly recommended for determining the quantity and quality of plastics used in products that require high-quality materials, such as electronic equipment. Testronix specializes in providing top-notch melt flow index testers at affordable rates so you can make sure your product meets all safety standards. If you would like more information about how we can help with testing, then you can give us a call today at +91 9313 140 140 or email us at

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