What is Wurster coating?
What is Wurster coating?
Wurster coating, synonymous with fluid bed microencapsulation, is the encapsulation of discrete particles in a fluidized bed using differential air flow to create a cyclic movement of material.
What is Wurster technology?
The Wurster process is recognized as the technology for precision application of a film coating onto particulate materials such as powders, crystals, or granules, and other solid ingredients with diameters ranging from 30 µm to several centimeters.
What is the FBP principle?
The main principle involved in the FBP is the air suspension in which the material to be coated is suspended in the coating material with the help of air stream. Fluid bed process involves three principles viz., top spray, bottom spray and tangential spray.
Which of the following defect is due to highly viscous coating solution?
4. Cratering
| Causes | |
|---|---|
| 1. | Penetration of coating solution at the surface of the tablet, often at the crown where the surface is more porous causing localized disintegration of the core. |
| 2. | Inefficient drying. |
| 3. | Application of higher rate of the coating solution. |
| 4. | Low the viscosity of the coating solution. |
What are the advantages of fluidized bed dryer?
The advantages of fluid bed drying include low investment and maintenance costs, large-scale continuous production, lower air temperatures than spray drying and a relatively short drying time compared to freeze drying and vacuum drying. However, non-granular samples cannot be dried using fluid bed drying.
What are different advantages of fluidized bed dryer?
Advantages of Fluid Bed Dryer Fluidized Bed Dryers Guarantee Fast and Homogeneous Drying. Fluid Bed Dryer is Suitable for Heat Sensitive Products. Fluidized Bed Ensures Efficiency in Material Drying. Handling Fluidized Bed Dryer is Easy and Less Labor Intensive.
