Aspects of foam stability influencing foam granulation in a twin screw extruder

Foam granulation is a newly developed method for the wet agglomeration of powders, displaying much improved process stability in extrusion machinery compared to conventional drop-wise liquid addition approaches. This paper examines aspects of foamed binder addition during the granulation of lactose monohydrate with different hydroxypropyl methylcellulose species. The work looks at the generation of foams with differing liquid drainage and shear …