Determining Viscosity Data Using a Slit Die Viscometer

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Tuesday, September 17 9:30 AM - 10:00 AM

Location: General Session


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Title: Determining Viscosity Data Using a Slit Die Viscometer

Description:

This paper describes how a slit die viscometer connected to a laboratory extruder can be used to obtain accurate data on melt viscosity at various shear rates and different temperatures.  The slit die viscometer provides an inexpensive method to determine rheological data especially when compared to a capillary rheometer.

Type: General Session

Abstract:

Data on melt viscosity at various shear rates is useful in most extrusion operations.  Such data provides a valuable QC tool.  Viscosity data is required in screw and die design and also in computer simulation of the extrusion process.  Proper selection of an extruder screw or extrusion die requires knowledge of viscosity as a function of shear rate.  Further, instabilities such as melt fracture can be quantified and predicted if viscosity data is obtained from a capillary rheometer or slit die viscometer.

This paper describes how a slit die viscometer connected to a laboratory extruder can be used to obtain accurate data on melt viscosity at various shear rates and different temperatures.  The slit die viscometer provides an inexpensive method to determine rheological data especially when compared to a capillary rheometer.


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