About Gneuss Inc.


Gneuss Inc.
10820-G Independence Pointe Parkway
Matthews, NC 28105
United States

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Product Name:   Viscosimeter for online measurement of melt viscosity

At NPE 2006 Gneuss will introduce their new viscosimeter for online measurement of melt viscosity.

Gneuss developed a compact design for monitoring and recording of rheological parameters. This online viscosity measurement, or viscosimeter, is fitted between two flange connections. The melt channel can be designed according to customers’ specifications between 0.8 and 4 inches. The unit includes a pump drive, a pump, pressure transducers, temperature sensors and the control and evaluation electronics. The setting of process parameters, the evaluation and the display is realized via a user friendly touch screen panel or alternatively can be integrated into an existing control system.

By means of a high precision metering gear pump a small amount of polymer melt is diverted from the main melt channel and pumped through a precisely manufactured slot capillary. Melt temperature and melt pressure (at two locations) is measured. Based on internal calculations the viscosimeter monitors the value of the representative shear rate and the corresponding viscosity. Different shear rates can be set and by corresponding corrections the real values for viscosity and shear rate can be derived.

This viscosimeter offers the following advantages:
• Short dwell time, no dead spots, no remains in the melt channels
• No elastic properties recorded due to measurement in rectangular cross section
• Polymer bypass, therefore no melt losses
• Minimal temperature variations (< 2 °C) of all parts in contact with melt
• Complete cleaning possible without interruption of production process
• Very compact design, flexible adaptation to existing melt pipes or extrusion lines



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