Drying - Before Packing

Drying means putting out the liquid. Dryers may be atmospheric (spray dryer, fluid bed dryer, etc...), or vacuum (belt dryer, tray dryer, etc…). 

•Spray Dryer: by definition, spray drying is the transformation of feed from a fluid state into a dried form by spraying the feed into a hot drying medium. The process is a one step continuous operation. The feed can be either a solution, suspension or a paste. The spray dried product conforms to powder consisting of single particles or agglomerates, depending upon the physical and chemical properties of the feed and the dryer design and operation 

•Vacuum dryer: at constant volume, when the pressure decreases, the boiling temperature decreases. Evaporation at a lower temperature makes possible to get a preserved product. In addition the high rate of heat efficiency is said to result in the best drying performance in the world. The drying process is greatly accelerated due to the fact that the loaded material makes contact with the heating panel in the form of a thin layer. Vacuum drying does not cause the emission of any exhaust gases or hazardous smells.

•Lyophylization or cryodessication: a lyophilizator needs to cool (for freezing and trapping water), create a vacuum (to sublimate water), generate heat and transfer heat energy to the product. 

•Others: Rotary Drum Dryer: Wet material is introduced from one end of the dryer, and then stirred evenly by the oar of the inner barrel - Plate Dryer: kind of high-efficiency conductive and continuous drying - Blade Dryer : drying or cooling paste-like, granular, powdery and pulpous material - etc...

Before Packing

Further steps before packing consist in Milling, compacting (to increase the bulk density for instance), grinding (to tune the size reduction in a safe way, especially with fragile particle or components) and then homogenization and standardization: those steps guarantee a optimized repartition and the correct and needed content of actives as mentioned in our CoA (certificate of analysis).