Removable Device Cover With Differential Adhesive System
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Solution Overview
Problem
Existing device covers are difficult to place and remove by a single gloved professional, often leave adhesive residues on devices, and require the use of harmful solvents for residue removal, which is problematic in clinical settings where cleanliness and safety are crucial.
Innovation Solution
The development of a differential adhesive system comprising a removable acrylic adhesive layer and a permanent rubber adhesive layer, with the acrylic layer covered by a liner for easy removal without residue, allowing secure attachment and prolonged use without tearing the cover or leaving adhesive on the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single adhesive layer is used to secure the cover, then the cover can be attached to the device, but the adhesive leaves residues on the device after removal
Solution Approach 1:
The adhesive system is divided into two distinct layers: a permanent rubber adhesive layer attached to the cover that provides strong bonding, and a removable acrylic adhesive layer that contacts the device surface and allows clean removal. This segmentation resolves the contradiction by separating the functions of secure attachment and clean removal into different layers.
Solution Approach 2:
Different adhesive properties are applied at different locations within the adhesive system. The rubber adhesive layer (permanent) is positioned between the cover and the acrylic layer, while the acrylic adhesive layer (removable) is positioned at the interface with the device surface. This local differentiation of adhesive characteristics enables both secure attachment and residue-free removal.
2Duration of action of moving object
If the cover is removed after prolonged use, then the protective function is fulfilled, but adhesive residues are left on the device requiring harmful solvents
Solution Approach 1:
The segmented adhesive system allows the cover to remain attached for prolonged periods through the permanent rubber layer while enabling clean removal via the removable acrylic layer. This eliminates the need for harmful solvents regardless of how long the cover dwells on the device.
Solution Approach 2:
The adhesive system changes its functional parameters based on the removable acrylic layer's properties, which maintain adhesion strength over prolonged periods but allow clean removal without residue. This parameter optimization resolves the contradiction between prolonged use and clean removal.
3Strength
If the adhesive is too strong to ensure secure attachment, then the cover remains firmly attached, but it tears the plastic barrier upon removal
Solution Approach 1:
The two-layer adhesive system separates the strong bonding function (rubber layer) from the removal function (acrylic layer). The rubber layer provides the necessary adhesive strength to secure the cover firmly, while the acrylic layer enables clean removal that preserves the plastic barrier integrity.
Solution Approach 2:
Different adhesive strengths are applied at different locations in the adhesive system. The rubber adhesive layer provides strong bonding to the cover, while the acrylic adhesive layer provides controlled adhesion to the device surface that allows clean removal without damaging the plastic barrier.
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 clean removal of device covers after prolonged use without leaving residue, reducing the need for harmful solvents and maintaining cleanliness in clinical settings, while ensuring secure attachment to devices with low surface energy materials like polyethylene film.
Implementation Method 1
The first adhesive layer comprises an acrylic adhesive
Implementation Method 2
the second adhesive layer comprises a rubber adhesive secured to the device cover
Data Source
AI summary
The present disclosure provides example device covers implementing differential adhesive systems allowing for clean removal of the cover after a prolonged dwell period. An example device cover comprises a bore section, a first drape section extending from a first end of the bore section, and a second drape section extending from a second end of the bore section. A first edge of the first drape section may extend from the first end of the bore section at approximately a 50° angle, a second edge of the first drape section may extend from the first end of the bore section at approximately a 130° angle. The first drape section and second drape section may be symmetrical with respect to each other. The device cover may further comprise one or more adhesive tabs, each comprising an intermediary body with a first acrylic adhesive layer and an opposite second rubber adhesive layer.