Ribbon Mixer Blending Cohesion
Diffusion mixing can also be affected by product cohesion. Cohesion can be the result of electrostatic forces as might be found with sulphur compounds, van der Waals forces which become more prominent as particles become smaller (typically <2 microns) and available surface area increases and moisture which can cause stable agglomerates to form. To overcome these various attractive forces and effectively disperse one solid in another, either a longer mixing time will be require or higher energy input which is often achieve by the addition of high speed agitators or choppers mounted in the side of the ribbon mixer.
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