Multi-Layer Medical Adhesives for Strong Hold Without Skin Trauma

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Solution Overview

Problem

Existing medical adhesives cause skin injury (MARSI) due to high adhesion strength exceeding skin cell attachment, leading to cohesive failure and skin damage, while silicone gels provide low adhesion and holding power, necessitating a solution that balances adhesion without skin trauma.

Innovation Solution

Multi-layer adhesive constructions using a thin siloxane-based pressure sensitive adhesive layer on a thicker (meth)acrylate-based adhesive layer, with optional discontinuous layers, to modify surface properties and enhance adhesion without increasing skin damage, utilizing chemical and physical properties to achieve compatibility and crosslinking at the interface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If high adhesion strength adhesive is used, then adhesion to substrate is improved, but skin trauma increases due to cohesive failure

Engineering Contradiction:

Improveadhesion strengthVSAvoidskin trauma

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The adhesive is divided into multiple layers with different functions: a first adhesive layer provides strong substrate bonding, while a second adhesive layer provides moderated skin adhesion. This segmentation allows each layer to optimize its specific function without compromising the other, resolving the contradiction between strong adhesion and skin trauma prevention.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the adhesive construction have different adhesive properties tailored to their specific functions. The first layer near the substrate has high adhesion strength for secure bonding, while the second layer at the skin interface has moderated adhesion to prevent skin damage. This local differentiation of adhesive quality resolves the contradiction between strong holding power and skin safety.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If silicone gel adhesive is used, then skin trauma is reduced, but adhesion holding power decreases

Engineering Contradiction:

Improveskin traumaVSAvoidadhesion holding power

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The adhesive construction is segmented into two layers: the first layer uses silicone gel or other appropriate adhesive for moderated skin adhesion, while the second layer provides enhanced adhesion holding power for secure substrate bonding. This segmentation allows each layer to contribute its strengths without compromising overall performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adhesive construction uses a composite of different adhesive materials with complementary properties. By combining materials with different adhesive characteristics in a multi-layer structure, the construction achieves both moderated skin trauma and sufficient holding power, resolving the contradiction between skin safety and adhesion strength.

Inventive Principle:

Principle #40Composite materials

3Strength

If multi-layer adhesive construction is used, then adhesion performance is improved, but device complexity increases

Engineering Contradiction:

Improveadhesion performanceVSAvoidadhesive construction complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The adhesive is segmented into functional layers that can be applied sequentially using standard coating techniques. Each layer serves a specific function and can be optimized independently, improving overall adhesion performance while maintaining a manageable construction that follows systematic manufacturing processes.

Inventive Principle:

Principle #1Segmentation

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 multi-layer adhesive constructions reduce skin trauma by moderating adhesion, preventing debris accumulation, and maintaining high adhesion to substrates, addressing the 'black ring' issue and improving overall adhesion without weak boundary layers.

Implementation Method 1

utilizing chemical and physical properties to achieve compatibility and crosslinking at the interface

Methodology Applied

Scientific EffectCrosslinking: Chemical Bonding

Implementation Method 2

The multi-layer adhesive constructions reduce skin trauma by moderating adhesion, preventing debris accumulation, and maintaining high adhesion to substrates

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS12516225B2Multi-layer adhesives and articles

Publication Date: 2026.01.06 SOLVENTUM INTELLECTUAL PROPERTIES CO

AI summary

Adhesive articles with multi-layer adhesive constructions include a substrate and a multi-layered adhesive. The multi-layered adhesive includes a layer of a first adhesive in contact with the surface of the substrate, and a layer of siloxane-based pressure sensitive adhesive in contact with the first adhesive. The siloxane-based pressure sensitive adhesive includes a siloxane-(meth)acrylate co-polymer. The thickness of the siloxane-based pressure sensitive adhesive layer is less than the thickness of the first adhesive layer.