Incised Wound Pad Structure for Edge Adhesion and Flexibility
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Solution Overview
Problem
Adhesive wound care products often lose adhesion at the edges due to friction, leading to discomfort and reduced effectiveness, while there is a need for a balance between reliable adhesion and user-friendly, mild adhesives.
Innovation Solution
A wound pad with discrete groups of incisions, where each group has overlapping incisions starting on opposite sides of an imaginary line, enhancing flexibility and allowing the pad to conform to the body, thereby enabling the use of milder adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive wound care products use strong adhesives to ensure reliable adhesion, then adhesion reliability is improved, but skin friendliness deteriorates
Solution Approach 1:
The wound pad is divided into multiple discrete groups of incisions distributed across its surface. Each group contains multiple incisions that segment the pad structure, allowing different regions to have different flexibility characteristics while maintaining overall adhesion reliability with milder adhesives.
Solution Approach 2:
The incisions are strategically positioned in discrete groups rather than uniformly distributed, creating local variations in flexibility. Areas with higher incision density provide greater flexibility to accommodate body contours, while other areas maintain sufficient structural integrity for adhesion.
2Stability of the object's composition
If the wound pad is made rigid to maintain structural integrity, then structural stability is improved, but flexibility deteriorates
Solution Approach 1:
The pad structure is segmented through discrete groups of incisions that create localized flexibility zones. This segmentation allows the pad to bend and conform to body surfaces while the unincised portions maintain structural integrity and support the adhesive function.
Solution Approach 2:
The incisions create a flexible structure within the pad that allows it to conform to body contours. The thin film-like regions between incision groups provide flexibility, while the overall pad structure maintains sufficient rigidity to support the adhesive wound care product.
3Adaptability or versatility
If the wound pad is made flexible to conform to the body, then adaptability is improved, but stress concentration increases
Solution Approach 1:
The discrete groups of incisions segment the stress distribution across the pad. When the pad conforms to body contours, stress is distributed across multiple incision groups rather than concentrated in single regions, reducing peak stress values and preventing adhesive failure.
Solution Approach 2:
The pad structure is designed to dynamically adapt to body movements and contours through the flexible incised regions. This dynamic flexibility allows the pad to move with the body without creating excessive stress concentration that would compromise adhesion.
Data Source
AI summary
Described is a wound pad having a liquid retaining layer, and a distributing layer, wherein the liquid retaining layer, or the distributing layer, or both the liquid retaining layer and the distributing layer includes fibers and being provided with at least a first and a second discrete group of incisions, wherein the first and second discrete groups of incisions each includes a first incision extending from a starting point to a respective end point, and wherein the first incision extends though the liquid retaining layer, or the distributing layer, or both the liquid retaining layer and the distributing layer.