DIN 54811:1984-05

1 Scope and field of application
2 Principles of the method
3 Designation
4 Number of determinations
5 Apparatus
      5.1 Test device
      5.2 Temperature control
      5.3 Measurement of temperature and calibration
      5.4 Measurement of pressure
      5.5 Measurement of volumetric throughput of the
             sample
6 Sampling
7 Procedure
      7.1 Cleaning the test device
      7.2 Preparation of samples
      7.3 Determining the maximum test duration
      7.4 Measuring the volumetric throughput
8 Evaluation
      8.1 Volumetric throughput
      8.2 Apparent shear rate
      8.3 Apparent shear stress
      8.4 Flow curves and correction method
             8.4.1 Flow curves
             8.4.2 Plotting the flow curve
             8.4.3 Correction method accordinley for
                      determining the true shear stress
                      and flow curve
                      8.4.3.1 Correction method according
                                 to Bagley
                      8.4.3.2 Plotting the flow curve
                      8.4.3.3 Plotting the pressure
                                 correction
             8.4.4 Correction method according to
                      Rabinowitsch for determining the true
                      shear rate and flow curve
                      8.4.4.1 Correction method according
                                 to Rabinowitsch
                      8.4.4.2 Plotting the flow curve
      8.5 Viscosity and viscosity curve
             8.5.1 Viscosity
             8.5.2 Viscosity curve
9 Test report

The test method describes is used for determining the fluidity of wall-adhering plastics melts subject to shear rates, shear stresses and temperatures approximating to those arising in plastic processing. Testing plastics melts in accordance with this method is necessary, since the fluidity of plastics melts is generally not dependent solely on temperature, but also on other parameters, in particular on the shear rate and shear stress.