Gelatin-Free Pullulan Capsule Shell with Gellan and KCl
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Solution Overview
Problem
There is a need for a hard capsule shell that does not use gelatin, which is not acceptable for vegetarians, and instead employs a polymer from a non-animal source, while maintaining the structural integrity and functionality of traditional hard capsules.
Innovation Solution
A hard capsule shell composed of 95 to 98.7 wt% pullulan, 0.2 to 0.5 wt% low acyl gellan, 0.1 to 0.5 wt% high acyl gellan, and 1 to 2 wt% KCl, with optional sucrose monolaurate and sorbitan mono laurate, formed through dip molding to create a two-piece capsule that is gelatin-free and uses these components as a gelling agent and aid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gelatin is used as the capsule shell material, then the capsule provides good mechanical strength and structural integrity, but the capsule is not acceptable for vegetarians as gelatin is derived from animal body parts
Solution Approach 1:
The invention extracts and removes gelatin from the capsule shell composition entirely, replacing it with pullulan as the primary polymer material. This extraction eliminates the animal-derived component that prevents vegetarian acceptability while maintaining the essential capsule shell functions through the pullulan-based formulation.
Solution Approach 2:
The invention employs a composite material system consisting of pullulan as the base polymer, combined with low acyl gellan and high acyl gellan as gelling agents, and KCl as a gelling aid. This composite approach allows the non-animal pullulan to achieve the mechanical strength and structural properties traditionally provided by gelatin.
2Adaptability or versatility
If pullulan is used as the primary polymer to replace gelatin, then the capsule becomes acceptable for vegetarians, but the mechanical strength and structural integrity may be compromised
Solution Approach 1:
The invention creates a composite material system where pullulan serves as the base polymer combined with low acyl gellan and high acyl gellan as gelling agents, and KCl as a gelling aid. This composite formulation enables the vegetarian-friendly pullulan to achieve the structural integrity and reliability traditionally associated with gelatin capsules.
Solution Approach 2:
The invention optimizes the formulation parameters including the specific ratios of pullulan, low acyl gellan, high acyl gellan, and KCl, along with processing conditions such as dip molding temperature and drying parameters. These parameter changes enable the pullulan-based composite to develop adequate mechanical strength and structural stability for reliable capsule performance.
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 capsule shell provides mechanical strength, resistance to impact, and effective filling and disintegration performance, meeting the requirements for pharmaceutical or nutraceutical applications without using animal-derived materials.
Implementation Method 1
low acyl gellan, high acyl gellan and their combination are known to the skilled person as being gelling agents. KCl, when used in combination with a gelling agent, is known to the skilled person as being a gelling aid.
Data Source
AI summary
The invention discloses a hard capsule shell comprising pullulan, low acyl gellan, high acyl gellan and KCl.