Wels CampusEngineering

GÖTTFERT Rheograf 6000 - high pressure capillary rheometer

With the high-pressure capillary rheometer, the flow and viscosity curve of thermoplastics and elastomeres can be determined. To this end, the plastic granulate or powder to be tested is loaded into one of three available barrels of the capillary rheometer where it is heated and compressed. A piston subsequently extrudes the plastic melt through a capillary die at a predetermined force or speed. Three heating circuits are used that can be controlled individually and brought to different temperatures. The high-pressure capillary rheometer can be equipped with a single or triple barrel system. This makes it possible to test either the same material with different nozzle dimensions or different materials with
the same nozzle geometry. Furthermore, rheological measurements can also be carried out with a slit-die measuring nozzle. The measurements can be carried out in a temperature range from 60 ° C to 400 ° C and at shear rates from 0.1 to 100 000 1/s. It is also possible to perform Rheotens, pvT, back pressure chamber, thermal conductivity and die-swell measurements on the device. The pvT and thermal conductivity measurements can be performed with the test sample in plasticised as well as solid states.


  • Optional single- or triple-bore system
  • Measurement with round hole nozzle
  • Measurement with slotted nozzle
  • Rheotens measurements (extensional viscosity of polymer melts)
  • pvT measurements
  • Die-swell measurements
  • Thermal conductivity measurments as a function of pressure and temperature
  • Counterpressure chamber (pressure dependence of viscosity)
  • Slit-die with interchangeable flow channel inserts (nozzle height 0.5 mm, 1 mm, 2 mm; different surface roughness and coatings)