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| | Features.
 | Real time on-line
measurement and display of :-
Shear viscosity
Extensional viscosity
MFI,
MFR and FN
of the material in your extruder
  |
| Automatic logging and
archiving of Results |
| Single, dual and triple die systems
for ultimate flexibility |
| Optional local display. |
| Very fast response (sampling
delay 1 to 3 minutes irrespective of grade). |
| Self-cleaning construction. |
| Simple operator
interface |
| Secure RS485 communication
output. |
| Patented configuration. |
| Reduces waste by minimising
grade changeover times |
| Ease of installation. |
| Flexibility in locating
control cabinet |
PRINCIPLE OF OPERATION
The P3 extracts molten polymer from the extruder and conditions the melt. The
melt is then passed through a gear pump. The gear pump isolates the flow from
the pressure fluctuations found in the extruder. The gear pump also sets a flow
rate for the melt into 1 of three possible dies. The pressure drop developed in
each die is used to calculate the
rheological properties of the material. Multiple flow rates can be applied to
obtain a wider range of the rheology data.
P3 animation
COMMERCIAL BENEFITS
Accurate and precise rheological results are
obtained in almost real time for the material in the extruder. This saves the
need for manual testing in a laboratory and the associated problems of cost and
time delays. Significant reduction in off-spec material is also gained.
The Porpoise P3 rheometer presents many advantages against traditional lab
rheology measurements as shown in the comparison table below:
| P3 Rheometer |
Manual
Rheometer |
| Automated measurement, logging and display |
Labour intensive measurement and logging |
| Automatic self cleaning |
Manual cleaning and preparation |
| Rapid and frequent sampling |
Slow and infrequent |
| Real time measurement/representative results |
Delays in sampling |
| Trend display |
Discrete value
|
| Sensitive materials unchanged with testing |
Sensitive materials need additives |
| Low scatter values |
High scatter values |
The Porpoise P3 rheometer is also unique in being able to use up to 3 dies
automatically in the one rheometer.
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