Effect of the External Lubrication Method for a Rotary Tablet Press on the Adhesion of the Film Coating Layer
| Autor: | Kazunari Yamashita, Shigeru Itai, Tadashi Hakomori, Shin-ichiro Kimura, Yasunori Iwao, Hiroyasu Toyota, Hisami Kondo, Junko Imoto, Takayuki Kamiya |
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| Rok vydání: | 2017 |
| Předmět: |
Surface Properties
02 engineering and technology 030226 pharmacology & pharmacy 03 medical and health sciences Tableting chemistry.chemical_compound Film coating 0302 clinical medicine Lubricity Drug Discovery Technology Pharmaceutical Magnesium stearate Lubricant Composite material Lubricants Chemistry Adhesiveness General Chemistry General Medicine Adhesion 021001 nanoscience & nanotechnology Lubrication Wettability 0210 nano-technology Layer (electronics) Stearic Acids Tablets |
| Zdroj: | Chemicalpharmaceutical bulletin. 65(9) |
| ISSN: | 1347-5223 |
| Popis: | External lubrication is a useful method which reduces the adhesion of powder to punches and dies by spraying lubricants during the tableting process. However, no information is available on whether the tablets prepared using an external lubrication system can be applicable for a film coating process. In this study, we evaluated the adhesion force of the film coating layer to the surface of tablets prepared using an external lubrication method, compared with those prepared using internal lubrication method. We also evaluated wettability, roughness and lubricant distribution state on the tablet surface before film coating, and investigated the relationship between peeling of the film coating layer and these tablet surface properties. Increasing lubrication through the external lubrication method decreased wettability of the tablet surface. However, no change was observed in the adhesion force of the film coating layer. On the other hand, increasing lubrication through the internal lubrication method, decreased both wettability of the tablet surface and the adhesion force of the film coating layer. The magnesium stearate distribution state on the tablet surface was assessed using an X-ray fluorescent analyzer and lubricant agglomerates were observed in the case of the internal lubrication method. However, the lubricant was uniformly dispersed in the external lubrication samples. These results indicate that the distribution state of the lubricant affects the adhesion force of the film coating layer, and external lubrication maintained sufficient lubricity and adhesion force of the film coating layer with a small amount of lubricant. |
| Databáze: | OpenAIRE |
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