Test conditions Melt Flow Index Test

The determination of the Melt Flow Fate [MFR / MVR] is carried out according to the standardized ISO1133 and ASTM D1238 test methods. Polymer melts are melted in a heated test barrel. At the lower end of the test barrel is a standardized capillary is installed. During the measurement the polymer melt will be extruded.

During the test, the amount of material extruded through the capillary per time unit is measured according to a melting time defined in the standards. The determined value is given as Melt Flow Rate (MFR) in g/10min or as Melt Volume Rate in cm3/10min. The test temperature and the load weight are always indicated with the result on the and depend on the material.

The following table shows, for a selection of materials, the test weight and test temperature we recommend for performing the melt flow index test.

Prüftemp. Testgewichte / Testloads
Testtemp. 0,325 kg 1,2 kg 2,16 kg 3,8 kg 5,0 kg 10,0 kg 20,0 kg 21,6 kg
100 °C                
125 °C EVA              
150 °C     EVA          
160 °C             PVC  
190 °C     PVA(C)
EVA
PE
POM
TPU
TPE
  PE
PP
  PVC PE
WPC
200 °C         PS
GPPS
HIPS
     
220 °C           ABS
SAN
ASA
   
230 °C     PP

PMMA

MABS

PMMI

PP

PVDF

     
235 °C     PA11
PA12
  PA11
PA12
PA11    
250 °C     PBT          
260 °C     PBT   PMP     PMMI
275 °C     ECTFE   ECTFE
PA
  ECTFE  
280 °C   PPE
PS
PPE
PS
PET
PPE
PS
PPE
PS
     
300 °C   PC PPE
PS
  PPE
PS
PA-GF
PPS
     
315 °C         PPS      
330 °C     PC     PA6T    
340 °C     PC
LCP
    PEI    
343°C     PSU          
360 °C           PES
PPSU
PSU
   
372°C     PFA
PTFE
  PFA
PTFE
PFA
PTFE
   
400 °C     PES
PPSU
PEEK
         

 

Note:

Please note, this overview is a recommendation how to carry out the MFR measurement. Material-specific deviations of the test conditions by the polymer manufacturer may occur.

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