Process principles
Powder is mixed and moistened. A solvent or binder can also be
added. The powder bed is set into a centrifugal motion. (->
Fluid Bed Pelletizing in the rotor).
The impact and acceleration forces that occur in this process result
in the formation of agglomerates, which become rounded out into
uniform and dense pellets. The speed of rotation has a direct influence
on the density and size of the pellets.
The moist pellets are subsequently dried in the fluid bed.
If required, the systems can be made inert for applications with
organic solvents.
Another alternative for direct pellitizing is Spray Granulation.
Product characteristics of the pellets
Perfect pellet |
- Round pellets
- Good flow behaviour
- Easy to dose
- Good dispersibility
- Compact structure
- High bulk density
- Dense surface
- Wide grain diameter spectrum
- Low abrasion
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With suitable additives, pellets can be made into tablets or used
to fill capsules. The round shape is ideal for uniform coating.
Pellets are good for automatic dosing.
Manufacturing options
For this process, Glatt offers systems with different capacities:
Batch Fluid
Bed Systems with batch sizes from 500g to 250kg/batch.
Continuous Fluid
Bed Systems with throughputs from 10kg/h to 0.5t/h.
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