Experimental Methods Used to Obtain Flow Data

10 Experimental Methods Used to Obtain Flow Data 

In Section 5.11 design examples relating to polymer processing will be illustrated. In these examples the flow data supplied by material manufacturers will be referred to, so it is proposed in this section to show how this data may be obtained. 

The equipment used to obtain flow data on polymer melts may be divided into two main groups. 

In this apparatus the plastic to be analysed is placed between a heated cone and a heated plate. The cone is truncated and is placed above the plate in such a way that the imaginary apex of the cone is in the plane of the plate. The angle between the side of the cone and the plate is small (typically 5°). 

The cone is rotated relative to the plate and the torque. T, necessary to do this is measured over a range of rotational rates, 6. 

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