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    Coating method and technology

    Release time: December 9, 2014 number of hits: 1274

    Sugar coating materials include: syrup (colored syrup), mucilage, talcum powder, wax, etc.  
    1. Syrup: 65% - 75% (g / g), used for bonding powder coating and sugar coating layer.

    Colored syrup: syrup containing soluble food pigment. The dosage is about 0.03%.

    (3) glue: commonly used as adhesive, which can increase the viscosity, plasticity and firmness of the coat layer, and protect the core of the film. It is mostly used to coat the isolation layer. The common varieties are 15% gelatin, 35% Arabic gum, 4% Baiji gum and 35% peach gum.

     
      ④ Talc powder: as powder coating material, it can increase the whiteness of tablets and the absorption of oil.

    (5) white wax (insect wax): it is often used after melting and mixing with 2% dimethylsilicone oil. It is used for polishing sugar coated tablets.

    The sugar coating process includes: isolation layer, powder coating layer, sugar coating layer, colored sugar coating layer and polishing.

    (1) isolation layer: refers to the gelatinous coating layer which is wrapped outside the core and plays an isolation role. The core was isolated from the sugar coating layer to prevent the drug from moisture absorption deterioration and sugar coating damage. The isolation layer is usually wrapped with mucilage or gum syrup and a small amount of talcum powder. Generally, it has 4-5 layers.

    (2) powder coating layer (foundation layer): it refers to the coating layer that makes the coating layer thicken rapidly, eliminates the original edges and corners of the tablet, and lays the foundation for wrapping the sugar coating layer. The coating materials are syrup and talcum powder. Generally, it has 15-18 layers.

    (3) sugar coating layer: refers to the sugar crystal formed by the slow drying of syrup, which increases the firmness and sweetness of the coating layer, and forms a solid and smooth coating layer on one side. Generally, it has 10-15 layers.

    (4) colored coating layer: in order to increase the beauty, it is easy to distinguish different varieties of color coating or color layer. The dark sugar coating layer of the drug package, which is easy to decompose under light, has protective effect. First use light syrup, color from light to dark, easy to make color uniform. Generally, it has 8-15 layers.

    (5) polishing: apply a thin layer of insect wax on the surface of coating film. The surface of the garment is bright and moistureproof.