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International Standards

ISO 1133

Introducing ISO 1133 - Industrial Physics  

ISO 1133 is a set of international ISO standard procedures that determine the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastic materials.  

These two accurate ISO tests, primarily used for quality control and performed under specified temperature conditions, can be described as: 

  • Procedure A - a mass-measurement method  
  • Procedure B - a displacement-measurement method. 

Melt volume flow rate testing is particularly useful when inspecting materials of different filler content and when comparing filled, with unfilled, thermoplastics. Mass flow rate testing can be determined from melt volume flow rate testing measurements, or vice versa, provided the melt density at the test temperature is known. 

If you’re working with stable materials that aren’t rheologically sensitive to the conditions experienced during melt flow rate testing, this part of ISO 1133 is recommended. However, if your materials have rheological behaviors that are sensitive to the test’s temperatures and will degrade during inspection, ISO 1133-2 is a better option for you.  

ISO 1133 testing devices 

So, how can Industrial Physics improve your ISO 1133 testing?

MFR300 microprocessor melt flow system 

A perfect partner for your ISO 1133 quality assurance, quality control and R&D requirements - the MFR300 verifies and validates sample materials…fast!  This melt flow tester is highly accurate and easy to use, with sophisticated touch screen electronics and the latest in on-board microprocessor technology.  

With insightful Windows based Techni-Test™ software included as standard and multi datapoint capture - for accurate flow curve analysis.  

MFR200 manual advanced melt flow system 

The MFR200 is our mid-range melt flow tester and it’s another great option for ISO 1133 testing!  

Molten polymer is extruded through a closely controlled orifice under pre-set conditions and pressure is produced by a dead weight system.  

The extruded polymer is cut off automatically and is then weighed. Using the time interval to extrude the polymer its flow rate over 10 minutes can easily be determined.  

MFR100 manual basic melt flow system 

We make inspection devices to suit all budgets and the MFR100 is the basic model of Ray-Ran melt flow testers we offer. 

The manually operated test procedure is very simple to undertake and will quickly give you the melt flow index (MFI) or melt mass flow rate (MFR) in g/10 min. 

Your global test and inspection partner for ISO 1133