Polypropylene Reusable Container Structure for Easy Recycling
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Solution Overview
Problem
Existing reusable containers made from multiple materials are difficult to recycle due to the need for separate dismantling and material recognition, as each component is formed from a different material.
Innovation Solution
A container predominantly formed from a single material, polypropylene, with varying forms used for different components to provide desired performance characteristics, allowing easy recycling without significant dismantling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a container is made from multiple materials for different components, then the performance characteristics of each component are optimized, but the container becomes difficult to recycle due to the need for separate dismantling and material recognition
Solution Approach 1:
The container is predominantly formed from a single material (polypropylene) across all components including sides, connectors, and fixings. This homogeneity enables easy recycling without significant dismantling, as the entire container can be processed together as one material type while still achieving the required performance characteristics for each component through design variations of the polypropylene structure.
2Ease of manufacture
If a container is made from a single material, then recycling becomes easier, but the ability to provide optimized performance characteristics for different components is reduced
Solution Approach 1:
Different components of the container are formed from polypropylene with varying forms, densities, or structural configurations to provide the desired performance characteristics for each specific component. For example, some parts may use solid polypropylene for strength, while others use hollow or foam structures for lightweighting, all while remaining the same base material for recycling purposes.
3Strength
If a container uses plural components permanently secured together, then the container becomes more robust and durable, but the container becomes difficult to dismantle for recycling
Solution Approach 1:
All components including sides, connectors, and fixings are formed from the same material (polypropylene), which allows the container to be robust through permanent securing while enabling easy recycling. The homogeneity means that even though components are permanently secured for durability, the entire assembly can be processed together at the end of its working life without needing to separate different material types.
Data Source
AI summary
A container having three pairs of parallel sides; wherein one pair of sides is formed from side panels that comprise a sheet of honeycomb polypropylene with a sheet formed from polypropylene joined to one side of the honeycomb; and at least one pair of sides is formed from elongate sections formed from expanded polypropylene.