Expandable Cut-Pattern Cushioning Layer for Medical Compression
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Solution Overview
Problem
Conventional cushioning articles for medical applications are often bulky, inflexible, and difficult to wrap around joints or injuries, and they lack the ability to provide increased cushioning and compression on demand.
Innovation Solution
The development of sheet-like and multi-layer cushioning articles that can expand upon stress application, featuring a pattern of cuts that form gaps without material removal, allowing for increased breathability and energy absorption, and a second layer that forms apertures under stress to enhance cushioning and compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional cushioning articles are made with sufficient thickness to provide adequate cushioning, then cushioning performance is improved, but the articles become bulky and inflexible
Solution Approach 1:
The cushioning article is segmented into a two-layer construction: a thin conformable layer and a thicker cushioning layer. The conformable layer is divided into cell structures by cuts, allowing it to expand and conform to body contours without requiring bulk material throughout the entire article thickness.
Solution Approach 2:
The invention transitions from a single thick layer to a multi-layer structure where the conformable layer expands in the z-direction (thickness direction) when stressed, creating a three-dimensional cell structure that provides cushioning without requiring the entire article to be thick and bulky.
2Use of energy by moving object
If conventional cushioning articles are made with sufficient thickness to provide adequate cushioning, then energy absorption is improved, but the articles become difficult to wrap around joints or injuries
Solution Approach 1:
The cushioning layer is segmented into expandable cells that can be compressed and expanded. When wrapped around joints, these cells compress to allow wrapping, then expand to provide energy absorption and cushioning at the injury site.
Solution Approach 2:
The conformable layer is designed to be dynamic, transitioning from a compressed state during wrapping to an expanded state during use. This dynamic behavior allows the article to be easily wrapped around various body parts while providing adequate energy absorption when deployed.
3Stress or pressure
If conventional cushioning articles are made to provide adequate compression, then compression performance is improved, but the articles lack the ability to provide increased cushioning and compression on demand
Solution Approach 1:
The article employs a dynamic two-layer structure where the conformable layer can expand and contract. This allows the cushioning and compression levels to be adjusted on demand based on the patient's needs and the specific injury requirements, rather than providing fixed compression throughout.
Solution Approach 2:
The physical parameters of the cushioning article (thickness, density, compression level) can be changed on demand through the expansion and contraction of the conformable layer. When stressed, the layer expands to increase cushioning and compression; when relaxed, it returns to a thinner state, allowing flexible adjustment to different medical needs.
4Ease of operation
If conventional cushioning articles are made to be thin and flexible for ease of use, then ease of operation is improved, but cushioning performance and breathability are reduced
Solution Approach 1:
The article is segmented into two functional layers: a thin conformable layer for flexibility and ease of use, and a thicker cushioning layer for performance. The cuts in the conformable layer create cell structures that expand to provide adequate cushioning without requiring the entire article to be thick.
Solution Approach 2:
The invention uses a composite two-layer construction combining a thin conformable material with a thicker cushioning material. This composite structure allows the article to maintain flexibility and ease of use from the thin outer layer while providing adequate cushioning performance from the thicker inner layer.
5Use of energy by moving object
If conventional cushioning articles are made to provide adequate cushioning, then energy absorption is improved, but MVTR and breathability are reduced
Solution Approach 1:
The conformable layer incorporates a cellular structure with interconnected pores and channels created by the cuts. This porous structure allows moisture vapor to transmit through the layer (maintaining breathability and MVTR) while the expanded cells provide energy absorption and cushioning performance.
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
These articles provide improved cushioning and breathability as measured by MVTR, and increased compression when applied to the human body, making them more flexible and easier to use in medical settings.
Implementation Method 1
the layer expands in the z direction such that the article, when disposed on a human body, is able to provide increased cushioning to the human body by the absorption of energy
Implementation Method 2
the article, when disposed on a human body, is able to provide increased cushioning to the human body by the absorption of energy
Data Source
AI summary
Cushioning articles include a layer with a plurality of cuts arrayed in a pattern. The cuts are gaps and the gaps do not form apertures allowing one to see through the layer when the layer is in an unstressed state, but in a stressed state, at least some of the cuts become gaps that are perforations through the layer. In the stressed state the layer expands to form the cushioning article. The cushioning article may be a multi-layer article with another layer that is contacted to the stressed layer in the stressed state to hold the layer in a stressed state.