Protein-Based Capsule Shell for Sustainable Beverage Packaging
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Solution Overview
Problem
Existing capsules for hot beverages face challenges in sustainability, oxygen barrier efficiency, and manufacturing economics, with prior solutions not adequately addressing these issues.
Innovation Solution
A capsule design featuring a core material of compressed beverage substances encased in a protein-based shell, which provides a strong, oxygen-impermeable, and compostable barrier, allowing for adjustable mechanical and visual properties, and can be manufactured using dipping or spraying processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastics or aluminum are used as shell materials, then the capsule provides good barrier properties and mechanical strength, but the sustainability is poor
Solution Approach 1:
The patent changes the material parameters by using proteins with specific functional properties (solubility, cross-linking capability, film-forming ability) to create a biodegradable shell that maintains barrier properties and mechanical strength while improving sustainability. The protein concentration, molecular weight, and cross-linking degree are optimized to achieve the desired performance.
Solution Approach 2:
The patent employs composite material structures by combining proteins with other biodegradable polymers or natural materials to enhance the shell's barrier properties and mechanical strength while maintaining sustainability. This composite approach allows the shell to achieve performance comparable to plastic or aluminum shells without compromising environmental compatibility.
2Object-affected harmful factors
If biodegradable polysaccharide coatings are used, then sustainability is improved, but the oxygen barrier efficiency and stability are deficient
Solution Approach 1:
The patent optimizes the protein material parameters including concentration, molecular weight distribution, and cross-linking density to achieve both biodegradability and effective oxygen barrier properties. By adjusting these parameters, the shell maintains structural stability during storage and brewing while remaining compostable.
Solution Approach 2:
The patent creates composite structures combining proteins with biodegradable polymers or natural waxes to enhance oxygen barrier efficiency while maintaining sustainability. This composite approach allows the shell to achieve superior barrier properties compared to single-component biodegradable materials.
3Stability of the object's composition
If the core material is compressed to prevent disintegration, then the capsule stability is improved, but the manufacturing complexity and compression requirements increase
Solution Approach 1:
The patent adjusts the compression pressure parameters and core material properties to achieve optimal capsule stability without excessive complexity. The compression force, duration, and pressure distribution are optimized to prevent disintegration during brewing while using simple, readily available equipment.
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 protein-based shell enhances the durability and stability of the capsule, maintaining its shape during beverage preparation and enabling easy composting, thus addressing sustainability and manufacturing concerns while ensuring effective oxygen barrier performance.
Implementation Method 1
the shell comprising a protein... exhibits a high natural barrier to oxygen
Implementation Method 2
a core material in the form of a compact or a bulk material... The core material therefore preferably has a certain strength. This can preferably be achieved by compressing the core material with a compression pressure in the range of 1-100 MPa
Data Source
AI summary
Capsule for preparing a beverage, in particular a hot beverage, comprisinga core material in the form of a compact or a bulk material, wherein the core material is a beverage substance, anda shell encasing the core material, the shell comprising a protein.