| 摘要 |
PURPOSE:To coat circumferential surface of tablet, tabletted granule, powder, etc., of food, drug, drug assistant, etc., with a coating layer resistance to heat, alkali and acid, by using a gelan gum which is a kind of polysaccharides as a component of the coating layer. CONSTITUTION:A fluid system consisting of a sol of an aqueous suspension containing <=2wt% gelan gum based on water or an incompletely gelled (solidified) suspension is applied at 35-85 deg.C to the circumferential surface of tablet, tabletted granule, etc., of a drug, etc., to be coated in a manner to form a layer of uniform thickness by an arbitrary method such as immersion, spraying, etc., to obtain a tablet, etc., resistant to deterioration of quality. The gelan gum coating layer has excellent heat-resistance, alkali-resistance and acid- resistance and is tasteless, odorless and colorless. Accordingly, it gives no adverse effect to the drug, etc. It has extremely low moisture-permeability.
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