Multi-compartment Capsule with Segmented Barrier Walls
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Solution Overview
Problem
Conventional drug delivery systems (DDS) face limitations due to physical characteristics of pills, such as shape, dimension, and surface properties, which impair coating processes and decrease system performance, necessitating new methods for supporting DDS that provide improved bioavailability and controlled release metrics.
Innovation Solution
A multi-compartment capsule is created through filament extrusion, allowing for independently filled compartments with predetermined release times, achieved by forming and sealing compartments with specific barrier walls of varying thickness and composition, enabling tailored release performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional capsules use a single internal compartment with uniform wall structure, then manufacturing is simple, but controlled release performance and bioavailability are limited
Solution Approach 1:
The capsule is divided into multiple independent compartments (first compartment, second compartment, third compartment) separated by partition walls. Each compartment can be filled with different active ingredients or formulations, enabling independent controlled release profiles for each component. This segmentation allows complex multi-drug regimens to be delivered in a single capsule while maintaining controlled release performance for each drug.
Solution Approach 2:
Different wall thicknesses are applied to different compartments: the first compartment has a first wall thickness optimized for its release requirements, the second compartment has a second wall thickness optimized for its release requirements, and the third compartment has a third wall thickness optimized for its release requirements. This local differentiation of wall properties enables tailored controlled release performance for each compartment while maintaining overall capsule functionality.
2Productivity
If capsule wall thickness and composition are standardized, then manufacturing is efficient, but bioavailability and release metrics cannot be customized
Solution Approach 1:
The patent employs different wall thickness parameters for different compartments (first wall thickness, second wall thickness, third wall thickness) to control release rates. By varying this critical parameter across compartments, the system achieves customizable release profiles without fundamentally changing the manufacturing process, thus maintaining manufacturing efficiency while enabling adaptation to different therapeutic requirements.
Solution Approach 2:
The capsule utilizes polymeric materials with specific properties (pH-dependent solubility, enzyme degradability, swelling behavior, successive erosion and dissolution) to create composite wall structures. These composite materials provide both structural integrity and controlled release functionality, allowing the capsule to maintain manufacturing efficiency while achieving versatile release profiles through material selection rather than process complexity.
3Reliability
If polymeric coatings are applied to improve DDS performance, then drug delivery efficacy improves, but physical characteristics of the pill (shape, dimension, surface properties) are impaired
Solution Approach 1:
Instead of applying a uniform polymeric coating over the entire capsule surface, the patent segments the capsule into multiple compartments with partition walls. This segmentation allows different surface properties and coating requirements for different compartments, enabling optimized drug delivery efficacy for each compartment while preserving the overall capsule shape and surface properties for manufacturing efficiency.
Data Source
AI summary
A method of making a capsule comprising a plurality of compartments, the method comprising: initiating extrusion of a filament solution through a filament extruder; laying the filament solution to form a base of the capsule; forming a first compartment in the plurality of compartments, wherein the forming creates a first barrier wall having a first predetermined release time; forming a second compartment in the plurality of compartments, wherein the forming creates a second barrier wall having a second predetermined release time; filling the first compartment with a first material; filling the second compartment with a second material; and sealing the plurality of compartments thereby forming the capsule with a first sealed compartment and a second sealed compartment.