Home-Compostable Beverage Pod With Oxygen-Barrier Delivery Wall
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Solution Overview
Problem
Existing beverage containers for beverage preparation machines face challenges in being both home-compostable and providing a reliable oxygen barrier while maintaining functionality, as materials that meet these requirements are often not biodegradable or compostable, and home-composting poses stricter conditions than industrial composting.
Innovation Solution
A pod design with a multi-layered delivery wall structure, comprising a cellulose-based primary layer and a secondary layer with an oxygen barrier function, such as compostable plastic films, ensures home-compostability and effective oxygen barrier properties, allowing the pod to be used in conventional beverage production machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-biodegradable plastic and metal materials are used for beverage containers, then barrier performance and resistance to heat and pressure are improved, but compostability deteriorates
Solution Approach 1:
The patent applies composite materials by combining a cellulose-based material with a biodegradable barrier coating layer. The cellulose base provides structural integrity and compostability, while the biodegradable coating layer (such as polyhydroxyalkanoates, polyvinyl alcohol, or starch-based coatings) provides the necessary oxygen and moisture barrier performance. This composite structure resolves the contradiction by achieving both reliable barrier properties and compostability through the synergistic combination of two different material systems.
2Object-generated harmful factors
If biodegradable materials are used for beverage containers, then compostability is improved, but barrier performance and resistance to heat and pressure deteriorate
Solution Approach 1:
The patent uses composite materials where a biodegradable barrier coating is applied over a cellulose-based substrate. The coating layer (made from materials like polyhydroxyalkanoates, polyvinyl alcohol, or starch derivatives) provides enhanced oxygen and moisture barriers, while the cellulose base maintains structural strength and compostability. This composite approach allows the container to meet both compostability requirements and barrier performance standards.
Solution Approach 2:
The patent applies parameter changes by modifying the physical and chemical properties of the biodegradable coating materials through controlled degradation processes. The coating layers are designed to maintain their barrier properties during storage and use, then undergo parameter changes (structural breakdown) under composting conditions (moisture, heat, microbial activity) to become fully biodegradable. This allows the material to provide reliable barriers when needed and decompose when disposed of.
3Ease of operation
If extraction face material is optimized for opening performance, then beverage preparation quality is improved, but adhesion to opening elements and delamination before use increases
Solution Approach 1:
The patent applies local quality by creating distinct zones within the sealing flange structure. The extraction face portion is designed with specific properties (smoother surface, optimized thickness) for clean opening and reduced adhesion, while the sealing flange portion maintains stronger bonding characteristics for stable attachment to the pod body. This localized differentiation of material properties allows the extraction face to open easily without delaminating during storage, resolving the contradiction between opening performance and stability.
4Object-generated harmful factors
If home-compostable materials are used, then environmental friendliness is improved, but composting conditions become less controlled and more demanding
Solution Approach 1:
The patent uses composite materials designed to provide robust barrier protection during storage and use, then reliably decompose under home composting conditions. The biodegradable coating layers are formulated to maintain their protective functions throughout the product shelf life, then undergo controlled degradation when exposed to the moisture, heat, and microbial activity of home composting environments. This ensures both environmental friendliness and composting reliability.
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 pod achieves home-compostability and maintains beverage quality by using a multi-layered structure that meets the requirements for oxygen barrier and pressure resistance, ensuring compatibility with existing machines and easy disposal.
Implementation Method 1
a secondary layer (320) with an oxygen barrier function
Implementation Method 2
the pod having a wall portion that opens upon interaction with opening elements of the beverage production machine under the effect of rising pressure of a fluid being injected into the pod
Data Source
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AI summary
The invention relates to a home-compostable pod (100, 1000) for preparing a beverage in a beverage production machine. The pod (100, 1000) comprises a pod body (110) being composed of two connected half-shells (101, 102) that delimit a chamber (103) for containing a substance (105) for the beverage. The pod (100, 1000) comprises an injection wall (120), through which a fluid for preparing the beverage is injected into the chamber (103). The pod (100, 1000) comprises a delivery wall (130) for dispensing the prepared beverage from the pod (100, 1000) in the beverage preparation. The delivery wall (130) is connected to the pod body (110) and adapted to be opened upon interaction with opening elements of the beverage production machine under the effect of rising pressure of the injected fluid. The delivery wall (130) has a multi-layered structure (300), which comprises at least one primary layer (310) made of a cellulose-based material (311) or a regenerated cellulose material (312), and a secondary layer (320) with an oxygen barrier function. Alternatively, the delivery wall (130) can be provided as a multi-layered structure (300) that comprises a primary layer (3100) having the oxygen barrier function. For this, the primary layer (3100) is made of parchment paper or a compostable biopolymer. The invention also relates to a use of anyone of these pods (100, 1000) for preparing a beverage in a beverage production machine that has a pod holder with opening elements.