Enteric Soft Capsule Shell Using Type A Gelatin and Polymers
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Solution Overview
Problem
Current enteric dosage forms, particularly soft capsules, face issues such as 'orange peel' surface formation, coat integrity failure, and loss of gelatin shell clarity due to heat-sensitive composition, leading to ineffective gastric protection and unpleasant side effects like fishy odor and gastric disturbances during fish oil ingestion.
Innovation Solution
Development of all-natural enteric soft capsules using a gelatin composition with Type A gelatin, anionic polysaccharides like pectin, and glycerol as a plasticizer, which are processed to create a robust, acid-resistant shell that does not dissolve in gastric fluid for at least two hours and dissolves in intestinal fluid within 10 minutes, maintaining clarity and reducing side effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a film-coating process is used to create enteric dosage forms, then enteric protection is achieved, but surface defects such as orange peel formation, mottling, and coat integrity failure occur
Solution Approach 1:
The patent combines the enteric coating function with the gelatin shell matrix by incorporating acid-insoluble polymers directly into the gelatin composition during manufacturing. This integration eliminates the separate film-coating step, avoiding surface defects while maintaining enteric protection through the homogeneous distribution of enteric agents within the shell structure.
Solution Approach 2:
The patent creates a composite gelatin shell material combining gelatin with acid-insoluble polymers (such as cellulose acetate phthalate, hydroxypropyl methylcellulose phthalate, or polyvinyl acetate phthalate). This composite structure provides both the structural properties of gelatin and the enteric resistance of the polymers, achieving reliable gastric protection without surface coating defects.
2Reliability
If enteric coating is applied to soft capsules, then gastric protection is provided, but the clarity and shiny appearance of the gelatin shell is lost
Solution Approach 1:
The patent merges the enteric protection function into the gelatin shell matrix itself by dispersing acid-insoluble polymer particles throughout the gelatin during manufacturing. This eliminates the need for an external opaque coating layer, allowing light to pass through the transparent gelatin shell while the embedded polymers provide gastric resistance.
Solution Approach 2:
The patent applies the enteric function locally within the gelatin matrix through dispersed polymer particles rather than as a surface layer. This localized incorporation maintains the optical clarity of the gelatin shell while providing enteric protection at the points where polymer particles are distributed, preserving both aesthetics and functionality.
3Reliability
If heat is applied during the coating process, then the enteric coating is formed, but the heat-sensitive gelatin shell undergoes agglomeration and distortion
Solution Approach 1:
The patent incorporates the acid-insoluble polymers into the gelatin shell during the initial manufacturing process before the capsule is completed. This preliminary integration ensures the enteric agents are uniformly distributed and bonded within the gelatin matrix, eliminating the need for subsequent heat-intensive coating steps that could damage the heat-sensitive gelatin and cause agglomeration or distortion.
Solution Approach 2:
The patent combines the shell formation and enteric agent incorporation into a single manufacturing process. By mixing acid-insoluble polymers with gelatin during shell fabrication, the enteric function is built into the shell structure itself, avoiding separate coating operations that would require heat exposure and risk shell integrity.
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 solution provides effective gastric protection, prevents unpleasant side effects, and maintains the clarity and elegance of the gelatin shell, enhancing patient compliance and bioavailability of active ingredients like fish oil and non-steroidal anti-inflammatory drugs.
Implementation Method 1
enteric soft capsules comprising cationic Type A gelatin and acid insoluble enteric polymers
Implementation Method 2
a robust, acid-resistant shell that does not dissolve in gastric fluid for at least two hours
Implementation Method 3
dissolves in intestinal fluid within 10 minutes
Data Source
AI summary
Described herein are soft capsules and enteric soft capsules comprising cationic Type A gelatin and acid insoluble enteric polymers. In particular, the compositions and methods for manufacturing all-natural enteric soft capsules comprising Type A gelatin and matrix fills are described. In one embodiment, the enteric soft capsules comprise active ingredients such as non-steroidal anti-inflammatory drugs (NSAIDs). In another embodiment, the enteric soft capsule comprises matrix fills of omega-3 fatty acids.