Novel Coating Uniformity Models for Tablet Pan Coaters

Novel mathematical models were developed to predict inter-tablet coating uniformity in terms of coefficients of variation ( CV ) and acceptance values ( AV ) for cylindrical tablet pan coaters, operating in batch and continuous modes. The models, based on binomial coating spray and tablet movement distribution functions and on bed geometry, yielded equations and results that are in good agreement with previously reported experimental data, most empirical expressions, and more computationally intensive models. The new model equations are readily useable for process analysis, optimization, scale-up, and manufacturing design and control.