The development of cracks on delayed release film of hygroscopic cores: A review of the tablet and coating formulations, coating processes and storage conditions
Bibliographic record
Abstract
Methacrylic Acid Copolymer Dispersion NF (aqueous dispersin of Methacrylic Acid Copolymer Type C in water) has been used extensively for delayed release coating in the pharmaceutical industry. However, a concern is that the Methacrylic Acid Copolymer Dispersion NF may cause cracks to develop in the coating film in hygroscopic tablets. These develop because the polymer is inherently brittle and therefore cracks during storage, especially when exposed to elevated heat and/or humidity. A crack in the coating film develops as the polymer is unable to accommodate the stresses that are generated during the coating process or because of changes in, e.g., tablet dimensions during storage. The important factors to maintain the integrity of the coating film are (i) formulation of the tablet core and its hardness, (ii) formulation of the coating dispersion, and (iii) coating process parameters. Tablet core hardness, its relaxation properties, water content, content of the insoluble component in the coating formulation, and temperature and relative humidity (RH) of the inlet air influences the film quality and integrity. In this paper, the probable causes for the development of cracks in the film coating on a hygroscopic core are discussed with reference to the properties of the tablet core, coating formulations (e.g., polymers, plasticizers, insoluble excipients) and the coating process parameters.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".