Wrapped Drainage Units for Sunlight and Heat Protection
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Solution Overview
Problem
Drainage units made from recycled polystyrene with non-white material exhibit inconsistent appearance and are prone to deterioration due to sunlight exposure, leading to potential quality and functionality concerns, and the use of UV-inhibiting additives in clear films does not effectively protect against infra-red radiation.
Innovation Solution
Forming expanded-foam bead aggregate from recycled polystyrene with 4 weight percent titanium dioxide and 0.25 weight percent carbon to achieve a uniform gray color, and wrapping them in film that inhibits both UV and infra-red radiation transmission, while applying tension to compress and reshape the units for efficient packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If recycled polystyrene with non-white material is used to make aggregate, then cost is reduced and environmental sustainability is improved, but product appearance becomes inconsistent
Solution Approach 1:
The patent applies colorant to the recycled polystyrene aggregate to standardize its appearance. By adding a uniform color overlay, the variability in color from mixed recycled materials is masked, producing a consistent visual appearance across all drainage units while maintaining the cost and environmental benefits of using recycled content
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 the use of mixed recycled plastic, prevents deterioration from sunlight exposure, maintains consistent product appearance, and allows for more efficient shipping and storage by reducing unit dimensions, thereby avoiding overheating and degradation of the aggregate.
Implementation Method 1
wrapping a set of three drainage units in film which has the property of inhibiting the transmission of both UV portion and the infra-red portion of the radiation
Implementation Method 2
wrapping a set of three drainage units in film which has the property of inhibiting the transmission of both UV portion and the infra-red portion of the radiation
Implementation Method 3
applying tension to compress and reshape the units for efficient packaging
Data Source
AI summary
A set of three tubular drainage units, each comprised of expanded recycled polystyrene aggregate which is gray in color, is wrapped in film which optionally compresses the drainage units radially and which impedes transmission of infra-red radiation to the aggregate when the drainage units are exposed to sunlight during shipping or storage.