Rheometry on the double
24 Jun 2006
Plastics films manufacturer Renolit AG, based in Salzgitter, Germany, is using rotational and capillary rheometers from Malvern Instruments to determine the rheological properties of polymer melts.
The units, at Renolit's analytical laboratory, support the daily production cycle at the company, which requires detailed determination of raw material for the manufacture of PVC and polyolefin films.
Renolit applies both rotational and capillary rheometry techniques to measure shear and extensional viscosities. The dual capability is required as polymer samples that exhibit identical shear viscosities can show significant differences in extensional viscosity, explains Malvern.
