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Principle of the powder layering process
Principle of the suspension and solution layering process
A starting grain or a pellet can be presented as the starting material.
The pellet is built up to the required grain size by adding the
layering substance one layer at a time.
Powder and binders, suspensions or solutions make suitable layering
substances. The layers are densely applied due to the movement of
the pellets in the rotor (->
Fluid Bed Pelletizing in the rotor).
Different layers of various types can be applied.
Thick layers can be applied to the starting grains, which, in the
case of layers containing active ingredients, allow large amounts
of active ingredient to be incorporated.
Product characteristics
Layered pellet |
- Dust free
- Round pellets
- Good flow behaviour
- Easy to dose
- Compact structure
- Low hygroscopicity
- High bulk density
- Dense, uniform surface
- Narrow grain size distribution
- Low abrasion
- High active ingredient content possible
- Optimum starting shape for subsequent coating
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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 Batch
Fluid Bed Systems with batch sizes from 500g to 250kg/batch.
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