Particle Encapsulation by Coating and Layering
Film coating, lipid coating, hot melt coating, core-shell coating or active substance layering.
Protection of particles and environment.
High active substance application.
The coating of solid particles can be used for the rapid application of layers with high amounts of active ingredient to a carrier material as well as for coating solid particles with a defined protective layer. In this way, functional product properties can be created, modified or adapted. The choice of coating depends on several objectives: the transport route, the environment and/or the appropriate release profile of the active ingredient – be it spontaneous, delayed or sustained.
A solid particle coating protects against external influences such as moisture, UV radiation, oxygen or reactive ingredients. In addition, solid particles can be refined and perfected with, for example, colorants, flavors, vitamins or minerals. The same processes can also be used to mask and reduce undesirable taste and odor components. The spray liquid can consist of solids-containing solutions, suspensions, emulsions or melts.
Coating and layering processes in the fluid bed or spouted bed as well as in the pulsating gas stream of the Glatt powder synthesis allow a particularly homogeneous distribution of the layer material. Uniform and dense coatings are produced.
Further information on this topic can also be found in the following publications: