Single-Material Polymer Capsule Design for Simplified Recycling
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Solution Overview
Problem
Single-serve capsules and containers are poorly suited for recycling due to their mixed material composition, which complicates proper recycling streams, as they often contain a combination of materials that are not easily separable or too small to be collected effectively.
Innovation Solution
Designing beverage and food capsules made entirely of a substantially pure polymer material, with a filter and cover formed from the same material, allowing for easy recycling by remaining connected after use, thus avoiding separation into different recycling streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If capsules are made from multilayered materials with different materials for body, filter, and cover, then functional performance is improved, but recyclability deteriorates
Solution Approach 1:
The patent applies homogeneity by making the body, filter, and cover of the capsule from the same or compatible polymer materials. This allows the entire capsule to be processed through a single recycling stream, eliminating the need to separate different materials. The filter is specifically designed to be made from the same polymer material as the body, ensuring uniform composition throughout the capsule structure.
2Ease of manufacture
If capsules are made from substantially pure polymer material, then recyclability is improved, but material versatility deteriorates
Solution Approach 1:
The patent utilizes parameter changes by selecting different substantially pure polymer materials based on the specific application requirements. The body, filter, and cover can be made from the same polymer material or from different but compatible polymer materials, allowing optimization of properties such as barrier performance, mechanical strength, and thermal resistance while maintaining recyclability through single-stream processing.
3Reliability
If filter is made from small separate components, then filtering function is improved, but collection efficiency in recycling deteriorates
Solution Approach 1:
The patent applies merging by integrating the filter as an integral part of the capsule body, made from the same polymer material. This eliminates separate small components that would be difficult to collect and sort during recycling. The filter structure is designed to remain connected to the main capsule body, ensuring it is collected as a single unit in the recycling stream.
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 enables capsules to be recycled more efficiently by ensuring all components are made of the same material, simplifying the recycling process and preventing small parts from being misplaced in recycling streams, thereby enhancing recyclability.
Implementation Method 1
a filter formed entirely of the same substantially pure polymer material as said body, said filter being disposed in said interior space to define an ingredients chamber for containing and filtering ingredients for preparing a desired beverage product
Data Source
AI summary
A system is provided for making a beverage capsule for use in a beverage preparing machine. The system includes a filter station for sealing a filter to an interior space of a body for the beverage capsule to define an ingredients chamber; an ingredients station for depositing a desired volume of desired ingredients into the ingredients chamber; and a cover sealing station for sealing a cover to the body. The cover being sealed to the body to define a hinge zone and a peel zone, wherein the hinge zone has a stronger seal than the peel zone.