Vibration-Resistant Dry Skin Adhesive Patch With Microchannels
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Solution Overview
Problem
Existing skin adhesive technologies face challenges in maintaining adhesion on wet and rough skin surfaces, especially under vibrating conditions, due to limitations in breathability and vibration resistance, and often cause skin irritation with chemical adhesives or fail to adhere effectively in moist environments.
Innovation Solution
A dry adhesive patch with a microchannel structure for moisture regulation and an interlocking structure for vibration resistance, mimicking the microchannel structure of frogs and the interlocking structure of snails, which enhances adhesion and transmissibility on both dry and wet surfaces by dispersing vibrations through elastomeric layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If chemical adhesives are used to achieve strong adhesion, then adhesive strength is improved, but skin irritation and inflammation occur due to pollutants remaining on the biological surface
Solution Approach 1:
The patent replaces chemical adhesion mechanisms with physical adhesion mechanisms. The dry adhesive patch uses van der Waals forces and capillary forces through microchannel structures to achieve adhesion without chemical bonds, eliminating skin irritation from chemical pollutants while maintaining strong adhesive strength
Solution Approach 2:
The patent employs porous microchannel structures on the adhesive surface that enable capillary action for moisture regulation. These porous features allow the adhesive to function through physical interactions rather than chemical bonds, resolving the contradiction between strong adhesion and skin safety
2Reliability
If dry adhesive structures are designed for vibration resistance, then vibration resistance is improved, but adhesion on wet surfaces decreases due to sweat
Solution Approach 1:
The patent applies different functional qualities to different parts of the adhesive structure. The microchannel structures provide moisture regulation and vibration resistance in specific zones, while other areas maintain optimal contact for adhesion. This localized functional differentiation allows the adhesive to perform well on wet surfaces while resisting vibrations
Solution Approach 2:
The patent creates a composite adhesive structure combining multiple materials with different properties. The adhesive layer integrates moisture-regulating components and vibration-resistant features, enabling simultaneous performance on wet surfaces and resistance to vibrations through material composition rather than单一功能
3Strength
If chemical adhesives are used to achieve strong adhesion, then adhesive strength is improved, but adhesion cannot be maintained under repetitive vibrations due to chemical bond disruption
Solution Approach 1:
The patent substitutes chemical bonds with physical bonds for adhesion. The dry adhesive mechanism relies on van der Waals forces and capillary forces that are not disrupted by vibrations in the same way chemical bonds are, maintaining reliable adhesion under repetitive vibrations while achieving strong initial adhesion
4Reliability
If moisture regulation is improved through microchannel structures, then breathability is improved, but adhesion on rough skin surfaces becomes challenging
Solution Approach 1:
The patent introduces microchannel structures that add a vertical dimension to moisture management. These channels create pathways through the adhesive layer for moisture transport, enabling breathability without compromising the horizontal adhesion interface. The multi-dimensional structure allows simultaneous moisture regulation and rough surface adhesion
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 patch achieves high adhesion and vibration transmissibility on moist and rough skin surfaces, minimizing skin irritation and maintaining adhesive strength even under repetitive vibrations, with a vibration transmissibility of equal to or greater than 99% and improved breathability.
Implementation Method 1
the skin surface adhesive portion regulates the moisture on the adhesive surface by allowing the passage of moisture, such as sweat, generated on the skin structure for discharge
Implementation Method 2
The microstructure connection portion, when composed of interconnected elastic structures consisting of two or more layers, induces high adhesive strength and provides resistance to vibrations by dispersing surface stress
Implementation Method 3
Dry adhesives, utilizing physical interactions to induce adhesion between two surfaces
Data Source
AI summary
The present invention relates to a dry adhesive patch including a first layer flexible and having a structure with embossed or engraved structures on one surface, a second layer flexible and comprising an interlocking coupling surface formed to engage with the embossed or engraved structures of the first layer, and a microchannel structure layer stacked on the opposite surface of the interlocking coupling surface, wherein the microchannel structure layer comprises an adhesive surface comprising a plurality of embossed portions having a flat surface and microchannel grooves between the embossed portions and is exposed.