Our Mini-Extruder is a Micro-Compounder Minilab from ThermoHaake, which was installed in 2003. It can be run using co- or counter-rotating twin-screws. The sample can be either directly extruded or re-circulated via the integrated by-pass valve. During compounding an inert gas purge is applied. Currently our extruder is equipped with the standard circular strand ie. a variety of dies are available from ThermoHaake, if necessary. A major advantage of this apparatus is that the viscosity can be measured during the compounding process.