Fluidized Bed Dry Coating for Uniform Pharmaceutical Dosage Forms
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Solution Overview
Problem
Existing dry coating technologies lack an apparatus for efficiently and uniformly coating diverse pharmaceutical solid dosage forms using a fluidized bed, which integrates advanced components for precise material delivery and pneumatic control, suitable for a wide range of pharmaceutical substrates.
Innovation Solution
A system comprising a fluidized bed coating unit with an air handling system, coating powder and plasticizer nozzle feeders, a coating material reservoir with separate chambers for materials and anti-adherent, and an air compressor for controlled air delivery, enabling precise and uniform coating without solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional solvent-based coating systems are used, then coating application is achieved, but processing time is excessive and particle agglomeration occurs
Solution Approach 1:
The invention changes the physical state of the coating medium from liquid solvent to dry powder form. This parameter change eliminates the harmful effects of solvents including particle agglomeration, while significantly reducing processing time through direct powder deposition in the fluidized bed environment
Solution Approach 2:
The invention uses pneumatic delivery systems to transport coating powder and plasticizer through controlled air flow. The pneumatic system enables precise material delivery to the fluidized bed, achieving uniform coating application without solvent-based carriers that cause agglomeration
2Object-generated harmful factors
If dry coating method is used, then particle agglomeration is prevented, but precise material delivery control is insufficient in prior art
Solution Approach 1:
The invention segments the coating material delivery into separate controlled chambers - one for coating powder and another for plasticizer. Each chamber has independent pneumatic delivery control, allowing precise regulation of material flow rates and composition ratios without material mixing or agglomeration
Solution Approach 2:
The system incorporates feedback control through monitored air flow rates and material delivery parameters. The pneumatic delivery system adjusts material flow based on fluidized bed conditions and coating requirements, ensuring precise and consistent material application
3Ease of manufacture
If solvent-based coating is used, then coating application is achieved, but equipment adhesion problems occur
Solution Approach 1:
The invention uses pneumatic delivery systems to transport coating powder and plasticizer through controlled air flow. The pneumatic system enables precise material delivery to the fluidized bed, achieving uniform coating application without solvent-based carriers that cause agglomeration
4Loss of time
If dry coating with coating polymer powder is used, then processing time is reduced, but coating uniformity and efficiency need improvement
Solution Approach 1:
The invention merges the delivery of coating powder and plasticizer through a concentric nozzle system in the fluidized bed. This combination enables simultaneous application of both materials, improving coating efficiency and uniformity while maintaining the time-saving benefits of dry coating methodology
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves enhanced coating efficiency and uniformity, reducing processing time and preventing particle agglomeration and equipment adhesion, suitable for various pharmaceutical forms like granules, tablets, and capsules.
Implementation Method 1
a fluidized bed coating unit having an air handling system
Implementation Method 2
a peristaltic pump configured to deliver the plasticizer material to the fluidized bed coating unit
Implementation Method 3
a heating unit configured to control the temperature of the air supplied to the fluidized bed coating unit
Implementation Method 4
filters configured to provide clean air to the fluidized bed coating unit
Data Source
AI summary
A system for dry coating pharmaceutical solid dosage forms, including a fluidized bed coating unit, a plasticizer delivery system, a coating material reservoir, and an air compressor with advanced pneumatic controls. The present disclosure also provides a method for dry coating pharmaceutical solid dosage forms using the system of the present disclosure. The system and method of the present disclosure ensure precise material delivery and uniform coating application, significantly reducing processing time and improving coating efficiency compared to conventional solvent-based coating methods.