Rheometer Investigation on Moist Powders
New studies by Freeman Technology indicate that the effects of humidity on powders can not be described with a single parameter. The company discusses its recent researches and their result in detail at the Powtech trade fair.
The researchers used the Freeman FT4 Powder Rheometer in dynamic tests to access the impact of humidity on the powder flow. Freeman believes the results of this experiments to be of particular interest to manufacturers working on the optimising of moist powder processes. According to the researchers, moisture adsorbed from the environment can have a range of effects, depending on the powder type (hydrophobic or hydrophilic). These results challenge the simplistic conclusion that all moisture is detrimental to powder flow. The FT 4 combines powder flowability measurements, shear cell testing and bulk properties measurements in one instrument.