Dynisco: Smaller on-line melt rheometer
A newly commercial on-line melt rheometer from Dynisco Polymer Test, USA, is said to be the smallest return-stream instrument on the market. Measuring only 22 in. long by 9 in. wide and priced about one-third less than competitive units, the ViscoSensor is said to be very easy to install and maintain. It can be used to measure shear rate vs. viscosity or ASTM melt index. The melt-sampling transfer line fits into a standard M18 pressure-transducer port in the extruder barrel. Melt enters and exits the ViscoSensor via an annular “pipe-within-pipe” transfer system. This is a zero discharge system whereby the melt sample is returned directly to the process, thus eliminating material waste.