Most coating processes typically utilize one of the general coating systems, such as the standard coating pan, perforated coating pan, and fluidized bed coater.
A notable advancement in the efficacy of standard coating pan systems has been marked by the introduction of the Pelligrini pan, immersion sword, and immersion tube systems, where coating solutions are applied through an atomized spray system directed at the surface of the rotating tablet bed.
In a similar vein, tablet coating technology has seen enhancements with the emergence of perforated pan coaters, including the Dria-coater, Hi-coater, and Accelacoater.
The Glatt-coater, with a capacity ranging from 25 to 1000 kg, represents the most recent perforated pan coater launched in the market. Additionally, auto coaters, such as the Ganscoater, come equipped with software programs and parameter setting profiles that include temperature maintenance, spray pattern or spray rate, and compressed air pressure, among others.
Vertical Centrifugal Coater
Vertical Centrifugal Coater (VCC) is the future of coating
The DIOSNA Vertical Centrifugal Coater (VCC) redefines coating technology, overcoming many of the common drawbacks associated with traditional coaters. Its adaptable design provides multiple application methods and ensures impressive coating outcomes, even for products with challenging flow properties, unique shapes, or lower hardness. The VCC’s superior drying efficiency and enhanced product flow significantly decrease processing times by over 50%, applicable to both organic solvent-based and aqueous processes.
DIOSNA VCC Vertical Centrifugal Coater
Enhances the efficiency of the coating process, significantly reduces process times, minimizes thermal and mechanical stress on the product, increases yield by reducing spray losses, and improves product handling.
SUPERCELL™ Tablet Coating Technology (SCT)
For research and development batches, a groundbreaking tablet coater is designed to precisely apply controlled quantities of coating materials onto tablets, even those that are highly hygroscopic or fragile.
Due to the loading of tablets into large rotating pans and the venting for hot air drying, the edges of the tablets may become ground down, intagliations may be filled with coating material, and the edges and corners may not receive the same thickness of coating as the faces of the tablets.
The imprecision in the deposition of coating materials restricts the application of modified release coatings. In a laboratory environment, it is essential to coat several kilograms of tablets simultaneously, which renders the research and development of a tablet dosage form both expensive and challenging.
Moreover, current technology is unable to coat extremely hygroscopic tablets, nor can it consistently coat flat or irregular shapes. The process must be conducted at a slow pace to avoid “twinning,” a phenomenon where two or more tablets adhere to one another. While tablets can also be coated using a Wurster-type coating apparatus, the attrition of tablets typically limits this method to only the hardest tablets.