Micro particles filled with liquid using the particles from gas saturated solutions technology

Classical methods offer many possibilities to generate powders. Where very small particle sizes especially in spherical shape are required, or highly viscous substances have to be reduced, the limits of traditional processes are reached soon. The solution can be found in high-pressure processes. The PGSS (Particles from Gas Saturated Solutions) process e.g. is suitable for the micronisation of several substances. With a couple of investigations it could be proved that fine powders with different morphologies can be manufactured [1-3]. The possibilities of the PGSS process have successfully been demonstrated over the last years for numerous solids such as e.g. polyethylene glycols, powder coatings and green tea. The aim of this investigation was the production of liquid filled powder micro particles using the PGSS process. This way the encapsulation of a dispersed liquid phase was achieved and powders with different properties were produced. The properties of the composi te powders can be adjusted by the process parameters of the PGSS process. Products with different morphologies, particle sizes and bulk densities can be manufactured