Deep understanding of relations between internal tablet structure and die wall pressure fluctuations in rotary tableting machines
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View abstract on PubMed
Summary
This summary is machine-generated.Residual die wall pressure is linked to tablet capping. This study used X-ray computed tomography and pressure monitoring to show how internal tablet cracks influence pressure fluctuations, potentially predicting tablet defects.
Area Of Science
- Pharmaceutical Sciences
- Materials Science
- Mechanical Engineering
Background
- Tablet capping, a common defect, is often linked to residual die wall pressure after tablet ejection.
- Understanding the relationship between internal tablet structure and die wall pressure is crucial for preventing capping defects.
Purpose Of The Study
- To investigate the correlation between the internal structure of pharmaceutical tablets and residual die wall pressure during tableting.
- To analyze how internal crack formation and distribution affect die wall pressure fluctuations.
Main Methods
- Real-time die wall pressure monitoring during the tableting process.
- X-ray computed tomography (X-ray CT) imaging to analyze internal tablet structure and crack formation.
- Correlation analysis between pressure data and internal crack distributions.
Main Results
- Two distinct residual pressure behaviors were observed: a sudden decrease at lower compaction forces (15 kN) and a transient increase at higher forces (20 kN).
- Acetaminophen-granulated lactose mixtures showed varied pressure profiles, while lactose-only tablets exhibited a consistent increase at high force.
- Internal crack locations (upper-edge vs. both edges) correlated with specific pressure drops or transient increases, and strain gauge position reflected crack distribution.
Conclusions
- Internal crack distribution significantly influences die wall pressure fluctuations during tableting.
- Die wall pressure measurement in rotary tableting machines can potentially predict the internal structure and defects of pharmaceutical tablets.
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