Skin Adhesive Composition for Stable Biosensor Wear
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Solution Overview
Problem
Existing living body tacky agents exhibit insufficient tackiness on the deformable surface of a living body due to the mismatch between the smooth, rigid test plates used for evaluation and the undulating, deformable body surfaces, leading to unreliable adhesion during prolonged use.
Innovation Solution
A living body tacky agent with a peel tackiness of 5.0 N/cm or greater at a 60° peeling angle, formulated with specific properties such as glass transition temperature, polymer molecular weight, and moisture content, to ensure reliable adhesion on human skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a living body tacky agent is evaluated using a smooth, rigid test plate, then the measurement is simple and standardized, but the evaluation results do not reflect the actual adhesion performance on deformable living body surfaces
Solution Approach 1:
The patent creates an artificial skin model that copies the essential characteristics of living body surfaces (deformability, elasticity, surface undulations) to replace rigid test plates. This model allows adhesion evaluation to reflect actual performance on living bodies while maintaining measurement standardization.
Solution Approach 2:
The patent changes the physical parameters of the test substrate from rigid to deformable by using artificial skin models with specific elasticity and surface properties. This parameter change enables the test plate to simulate living body surface deformation during adhesion testing.
2Strength
If a living body tacky agent exhibits excellent tackiness on a rigid test plate, then the material shows high adhesion strength, but it may not exhibit sufficient tackiness on the deformable surface of a living body
Solution Approach 1:
The artificial skin model copies the deformable surface characteristics of living bodies, allowing the tacky agent's adhesion performance to be evaluated under conditions that accurately reflect real-world application. This ensures that high adhesion strength measured in testing translates to reliable adhesion on actual living body surfaces.
3Ease of manufacture
If the test plate surface is smooth and rigid, then the testing procedure is simple and reproducible, but it does not account for surface undulations and deformations that occur on living bodies
Solution Approach 1:
The artificial skin model copies the complex surface topology and mechanical properties of living bodies, enabling the test procedure to adapt to realistic surface conditions while maintaining procedural simplicity and reproducibility through standardized model usage.
Solution Approach 2:
The patent changes the surface parameters of the test substrate to include undulations and deformability characteristics, allowing the testing system to adapt to living body surface variations without complicating the overall testing procedure.
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 tacky agent maintains excellent adhesion reliability on the skin surface, reducing deviations and ensuring stable signal acquisition over extended periods.
Implementation Method 1
a living body tacky agent having tackiness and provided on a surface of a substrate to be faced with a living body
Data Source
AI summary
A living body tacky agent according to the present invention is a living body tacky agent pasted on a living body. A peel tackiness of the living body tacky agent when the living body tacky agent, which is pasted on an adherend having an Asker C hardness of 0, is peeled from the adherend at an angle of 60° between a surface of the living body tacky agent facing the adherend and a pasting surface of the adherend is 5.0 N/cm or greater.