Segmented Adhesive Wafer for Ostomy Stress Distribution
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Solution Overview
Problem
Conventional adhesive wafers for ostomy appliances and wound dressings lack lateral flexibility, leading to discomfort, trauma, and increased risk of leakage due to stress concentration and limited mobility, especially under lateral movements.
Innovation Solution
An adhesive wafer design featuring a backing layer with independent first and second adhesive zones separated by a void volume, which acts as a buffer and leakage barrier, allowing for lateral flexibility and movement, and can incorporate different adhesives for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the adhesive wafer is made with a continuous adhesive layer and backing layer, then the wafer provides secure skin attachment, but the wafer lacks lateral flexibility and transmits stress causing discomfort and trauma
Solution Approach 1:
The adhesive wafer is divided into multiple independent adhesive zones (first adhesive zone, second adhesive zone, third adhesive zone) separated by void volumes. This segmentation allows each zone to move independently, providing lateral flexibility while maintaining secure skin attachment through the distributed adhesive zones. The void volumes act as buffers that absorb stress and prevent stress transmission across the entire wafer.
2Reliability
If the adhesive wafer is made with a continuous adhesive layer, then the wafer provides complete skin coverage, but the wafer builds up tension leading to loosening of tack and increased risk of leakage
Solution Approach 1:
The continuous adhesive layer is segmented into multiple independent adhesive zones separated by void volumes. This segmentation reduces tension buildup within the adhesive layer while maintaining reliable leakage prevention. The void volumes act as stress-relief zones that prevent tension propagation, thereby maintaining adhesive tack stability over time.
Solution Approach 2:
Different adhesive zones can incorporate different adhesives with varying properties optimized for their specific locations. This local quality approach allows each zone to perform its function optimally while the overall structure maintains reliability through the distributed zone configuration.
3Ease of manufacture
If the adhesive wafer is made with uniform thickness and structure, then the wafer is simple to manufacture, but the wafer cannot accommodate lateral movements or curved surfaces effectively
Solution Approach 1:
The wafer structure is segmented into adhesive zones and void volumes, creating a modular design that is relatively simple to manufacture while providing adaptability. The void volumes can be created using standard manufacturing techniques such as punching or molding, and the adhesive zones can be applied using conventional adhesive lamination processes.
Solution Approach 2:
The wafer has varying local properties with adhesive zones providing attachment and void volumes providing flexibility. This local quality differentiation allows the wafer to accommodate lateral movements and curved surfaces effectively while maintaining manufacturing feasibility through standardized production methods.
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 design provides increased comfort and reduced risk of leakage by distributing stress and allowing independent movement of adhesive zones, enhancing flexibility and attachment to the skin while maintaining a secure seal.
Implementation Method 1
The void volume acts as a buffer and leakage barrier, allowing for lateral flexibility and movement
Implementation Method 2
An adhesive wafer design featuring a backing layer with independent first and second adhesive zones separated by a void volume
Data Source
AI summary
An adhesive wafer for an ostomy faceplate or wound dressing comprising a backing layer, said backing layer having one surface facing the skin, said surface comprising a first and a second adhesive zone being separated from each others by a void volume, said void volume being defined by the backing layer, the first and the second adhesive zones and the skin surface and wherein the first and the second adhesive zones are capable of moving independently of each others with respect to the lateral plane of the backing layer.