Switchable Adhesive Layer for Ostomy Devices
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Solution Overview
Problem
Conventional ostomy devices face challenges in achieving quick and strong adhesion to the skin without causing skin damage and in preventing leakage, while also ensuring easy and painless removal without delamination of the adhesive layers.
Innovation Solution
The ostomy device incorporates a switchable adhesive composition that transitions from a high-tack to a low-tack state, combined with an absorbent adhesive layer, allowing for rapid and strong adhesion to the skin, effective moisture management, and easy removal by switching the adhesive state, thereby preventing delamination and skin damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a strong adhesive is used to achieve quick and strong adhesion to the skin, then adhesion strength is improved, but skin damage and difficulty in removal worsen
Solution Approach 1:
The adhesive layer incorporates a switchable component that can dynamically change its adhesive properties from high-tack to low-tack state. This dynamic transformation allows the adhesive to provide strong bonding during use, then easily release from the skin upon activation of the switchable component, resolving the contradiction between strong adhesion and easy removal without skin damage
Solution Approach 2:
The adhesive system changes its key parameter (adhesive strength/tack level) from a fixed state to a variable state. By controlling the switchable component's state, the adhesive strength can be adjusted between high (for secure attachment) and low (for painless removal), effectively resolving the contradiction between strong adhesion and skin safety
2Strength
If a thick adhesive layer is used to prevent leakage and ensure strong adhesion, then adhesion strength is improved, but device complexity and risk of delamination worsen
Solution Approach 1:
The adhesive layer is designed as a composite material system combining a base adhesive with a switchable component. This composite structure provides both the necessary adhesive strength and the leakage-preventing properties while maintaining a relatively simple overall architecture that minimizes delamination risks
Solution Approach 2:
The adhesive layer serves multiple functions simultaneously: providing strong adhesion to the skin, preventing leakage around the stoma, and enabling easy removal through the switchable component. This multi-functionality is achieved within a unified adhesive layer structure rather than through multiple separate components, reducing overall device complexity
3Reliability
If a thick adhesive layer is used to prevent leakage, then leakage prevention is improved, but ease of removal and risk of delamination worsen
Solution Approach 1:
The switchable component enables the adhesive layer to dynamically transition from a high-tack state (providing strong leakage prevention) to a low-tack state (enabling easy removal). This dynamic property allows the same adhesive layer to excel at both leakage prevention and ease of removal, resolving the contradiction between these two requirements
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 provides a strong and enduring adhesion to the skin, prevents leakage, and ensures easy and painless removal of the ostomy device, reducing the risk of skin damage and delamination, while maintaining effective moisture management around the stoma.
Implementation Method 1
a switchable adhesive composition that transitions from a high-tack to a low-tack state
Implementation Method 2
an absorbent adhesive layer, allowing for rapid and strong adhesion to the skin, effective moisture management
Data Source
AI summary
An ostomy device has a switchable adhesive layer located between a backing layer and an absorbent adhesive layer. The switchable adhesive layer has a photoinitiator reactive to visible light and the absorbent adhesive layer is a skin-facing layer having absorbent particles.