Application Note

Metered Dry Powder Addition for Continuous and Batch Coating Processes

Metered Dry Powder Addition for Continuous and Batch Coating Processes

Coated tablets are defined as tablets covered with one or more layers of various substances such as resins, gums, inactive and insoluable fillers, sugars, plasticizers, waxes, authorized coloring materials, and sometimes flavors. Tablet coating processes can be subdivided into different types. Sugar coating, for example provides a combination of insulation, taste masking, smoothing of the tablet core, coloring and modified release. Film coating, on the other hand, is usually a single stage process and easily adaptable for controlled release dosage forms.

Substances used for coating processes are usually applied as a solution or suspension under conditions where the carrier substance evaporates. In the case of sugar coated tablets, either via batch or continuous processing, the tablet must be polished to achieve a final aesthetic quality. Polishing is achieved by applying a mixture of powder waxes, such as carnauba wax, to the tablet in the polishing pan.

Conversely, in the case of film coated tablets, the addition of powdered opaquant extenders, such as talc, achieves a lighter color and greater film coverage.

In both of these coating processes, Coperion K-Tron twin screw feeders are used to provide consistent and metered delivery of these dry powders, directly into the coating equipment.

VIEW THE APPLICATION NOTE!
Signing up provides unlimited access to:
Signing up provides unlimited access to:
  • Trend and Leadership Articles
  • Case Studies
  • Extensive Product Database
  • Premium Content
HELLO. PLEASE LOG IN. X

Not yet a member of Pharmaceutical Online? Register today.

ACCOUNT SIGN UP X
Please fill in your account details
Login Information
ACCOUNT SIGN UP

Subscriptions

Sign up for the newsletter that brings you the industry's latest news, technologies, trends and products.

You might also want to: