Alginate Starch Casing Composition for Digestible Enrobed Food
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Solution Overview
Problem
Current edible casings made from plant materials are not digestible, lack flexibility, and have an unnatural appearance, which can deter consumers, while those containing collagen pose health risks and are unsuitable for vegetarian or halal products.
Innovation Solution
A composition combining alginate, starch, and carboxymethylcellulose in specific proportions, creating a coating that mimics the texture and appearance of animal-derived casings, with enhanced mechanical strength and elasticity, and is stable over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plant-based materials (starch, alginate) are used to create edible casings, then cost is reduced and vegetarian/halal/kosher requirements are met, but the casings lack digestibility and have unnatural appearance
Solution Approach 1:
The patent combines multiple plant-based materials (starch, alginate, carboxymethylcellulose) in specific proportions to create a composite casing material that achieves both digestibility and natural appearance. This composite approach allows each component to contribute its strengths while mitigating individual weaknesses, resolving the contradiction between cost-effectiveness and consumer acceptance.
Solution Approach 2:
The patent optimizes the proportions of each ingredient (2-5% starch, 1-3% alginate, 0.5-2% carboxymethylcellulose) and controls processing parameters to transform the physical and chemical properties of the plant-based materials. This enables the casing to achieve a natural, non-shiny appearance and improved digestibility while maintaining cost-effectiveness and dietary compliance.
2Ease of manufacture
If collagen is added to increase viscosity and enable extrusion, then casing formation capability is improved, but health risks and unsuitability for vegetarian products increase
Solution Approach 1:
The patent removes collagen entirely from the formulation and replaces it with plant-based thickening agents (carboxymethylcellulose, starch, and/or galactomannans). This extraction eliminates the health risks and dietary restrictions associated with collagen while maintaining the necessary viscosity and extrusion capabilities through alternative plant-based materials.
Solution Approach 2:
The patent uses food-grade plant-based thickeners that are safe for consumption and suitable for vegetarian products, replacing collagen with materials that are both cost-effective and compliant with various dietary requirements, while still achieving the desired casing formation properties.
3Strength
If galactomannans are used to thicken and stabilize the casing, then mechanical strength is improved, but texture becomes smooth and appearance becomes unnaturally shiny
Solution Approach 1:
The patent limits the amount of galactomannan to specific proportions (0.1-1% when used alone, or 0.05-0.5% in combination with other thickeners) to achieve local optimization. This controlled dosage provides sufficient mechanical strength and stability while preventing the excessive shininess and smooth texture that occur with higher concentrations, thus resolving the contradiction between strength and appearance.
4Force
If cellulose derivatives are used to thicken the coating composition, then viscosity is improved, but flexibility and resistance to tearing are insufficient
Solution Approach 1:
The patent creates a composite thickening system combining cellulose derivatives with starch and/or galactomannans in specific proportions. This composite approach allows the cellulose derivatives to provide the necessary viscosity for coating application, while the starch and galactomannan components contribute flexibility and tear resistance, thereby resolving the contradiction between viscosity and mechanical flexibility.
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 composition results in a coating that is safe, visually appealing, and maintains mechanical strength and elasticity, reducing liquid exudation and ensuring the coating remains intact during cooking and storage.
Implementation Method 1
contacting said coated food preparation with a gelling agent, so as to fix said envelope
Data Source
AI summary
Water based composition (I) comprises 2-5 wt.% of alginate, 1-2.5 wt.% of starch and 0.6-1.3 wt.% of carboxymethyl cellulose. Independent claims are included for: (1) manufacturing (I) comprising a step of filtering (I) through a filter with a mesh size of = 120 mu m; and (2) a method for coating a foodstuff with an edible vegetal casing comprising: obtaining (I); immersing a substantial part of the foodstuff in (I), or spray coating (I) around a substantial part of the foodstuff, or co-extrusion of (I) around a substantial part of the foodstuff, so as to coat the foodstuff; and contacting the coated foodstuff with a gelling agent, so as to fix the casing.