What is a tablet coating machine?
A tablet coating machine is an equipment that coats the external surface of a tablet using a thin film of coating material. Angled baffles are also fitted into the drum and also air flow is provided which acts as a means to mix the tablets.
What is a coating machine?
Tablet coating machines are used to coat the surface of tablets with a thin coating of film. The film is employed mostly to: mask the colour, taste and smell of the drug. protect the drug from physical or chemical harm.
What are the equipments used in coating process?
Coating equipments: – For the coating process use of one of the 3 types of following equipments. 1) Conventional coating pan. 2) The perforated coating pan. 3) The fluidized bed coater.
What is tablet coating and its types?
3.5 Coating Materials. Tablet coating is the process where coating material is applied to the surface of the tablet to achieve the desired properties of dosage form over the uncoated variety. There are three main processes for tablet coating: sugar coating, film coating, and enteric coating.
How many types of coating are there?
Coatings are varied, but primarily fall into three categories: Architectural, Industrial, and Special Purpose.
Why do tablets have a coating?
Enteric coating There are three reasons for putting such a coating on a tablet or capsule ingredient: To protect the stomach from the drug. To protect the drug from the stomach. To release the drug after the stomach e.g. in the intestines.
Why is coating necessary?
Industrial coatings are the best way to keep a variety of surfaces safe. They prevent corrosion. It can not only stand up to the processing material, but also prevent standard corrosion that may occur simply because of the material the machine is made from. They keep surfaces clean.
What is the importance of tablet coating?
The advantages of tablet coating are taste masking, odor masking, physical and chemical protection, protects the drug in the stomach, and to control its release profile. Coating may be applied to a wide range of oral solid dosage form, such as particles, powders, granules, crystals, pellets and tablets.
Why are tablet coated?
Among the advancement in the field of solid drug delivery system, tablets are the most important solid dosage forms for the delivery of drugs to the patients. Controlling the release kinetics, the coating is applied to the tablet either sugar or polymer coating to modify the drug release rate.
What is the importance of coating?
Industrial coatings are the best way to keep a variety of surfaces safe. They prevent corrosion. Rust or other corrosive debris is another issue that often pops up in industrial applications. Often the materials that are hard enough to actually build machinery from are also very likely to corrode over time.
What are types of coating?
Different Types of Coatings
- Types of Paint Coatings.
- Organic coatings. These coatings contain carbon, refined and/or modified petroleum products as well as different solvents, pigments, additives, and fillers.
- Inorganic Coatings.
What is the coating of tablets made of?
The substances used in enteric coating are hydroxypropyl methylcellulose phthalate (HPMCP), polyvinyl acetate phthalate, diethyl phthalate, and cellulose acetate phthalate. In general, tablets can be coated using either a fluid-bed dryer or air suspension coating.
What are tablet coating machines?
Tablet coating machines are used to coat the surface of tablets with a thin coating of film. The film is employed mostly to: mask the colour, taste and smell of the drug. protect the drug from physical or chemical harm.
Why are tablets coated?
Tablets are coated for many reason such as masking odour, taste, colour of the drug, providing physical and chemical protection to drug, protecting drug from the gastric environment.Coating is a process by which a layer of coating material is applied to the surface of a dosage form. Coating may also contain active ingredient.
What is the best book on pharmaceutical coating technology?
Pharmaceutical Unit Operations: Coating – Drug Manufacturing Technology Series, Volume 3. Florida: Taylor & Francis Group. Cole, G. (1995). Pharmaceutical Coating Technology. UK: Taylor & Francis Ltd. Lachman, L, Lieberman, H. and Kang, J. (1986). The Theory and Practice of Industrial Pharmacy.
How are perforated pans used to coating tablets?
The coating solution is applied to the surface of the rotating bed of the tablets through spraying nozzles that are positioned inside the drum. Perforated pans became popular when pharmaceutical manufacturers switched from organic solvent-based coatings to aqueous coatings.