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Related Experiment Videos

Multiple compaction of microcrystalline cellulose in a roller compactor.

J Martin Bultmann1

  • 1Institut für Pharmazeutische Technologie und Biopharmazie, Im Neuenheimer Feld 366, D-69120 Heidelberg, Germany. martin.bultmann@urz.uni-heidelberg.de

European Journal of Pharmaceutics and Biopharmaceutics : Official Journal of Arbeitsgemeinschaft Fur Pharmazeutische Verfahrenstechnik E.V
|June 27, 2002
PubMed
Summary

Multiple roller compaction of microcrystalline cellulose (MCC) improves granule properties like size and flow. However, repeated compaction cycles reduce MCC

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Area of Science:

  • Pharmaceutical Sciences
  • Materials Science

Background:

  • Roller compaction is a key granulation technique in pharmaceutical manufacturing.
  • Understanding the impact of repeated compaction cycles on granule properties is crucial for process optimization.

Purpose of the Study:

  • To investigate the effects of multiple roller compaction cycles on microcrystalline cellulose granules.
  • To evaluate the changes in granule characteristics, ribbon properties, and subsequent tablet compression behavior.

Main Methods:

  • Microcrystalline cellulose granules were subjected to up to ten cycles of roller compaction using a Gerteis 3 W-Polygran roller compactor.
  • Granule properties (size distribution, density, flow), ribbon quality, roll adhesion, and tablet compression behavior were assessed after each cycle.

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Main Results:

  • Multicompaction led to reduced fines, increased mean granule size, improved flowability, and better size distribution.
  • Bulk density increased, indicating decreased granule porosity, while roll adhesion decreased with cycles.
  • Despite improved granule properties, the tablet-forming ability of microcrystalline cellulose diminished with repeated compaction, leading to lower crushing forces.

Conclusions:

  • Multiple roller compaction cycles enhance granule characteristics but negatively impact the bonding capacity of microcrystalline cellulose.
  • Process parameters need careful adjustment to balance improved granule properties with the reduced tabletability observed in later compaction cycles.