Adhesive Sheet Heteroatom Polymer Substrate Anchoring
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Solution Overview
Problem
Adhesive sheets often experience separation between the substrate and the adhesive layer during unwinding or peeling, leading to incomplete adhesion and stickiness issues in applications like skin contact.
Innovation Solution
An adhesive sheet with a substrate containing a heteroatom-containing polymer component, such as an N,N-substituted amino group or heterocyclic group, is used in conjunction with a crosslinked silicone adhesive layer to enhance anchoring performance and prevent substrate-adhesive separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional substrate and silicone adhesive layer are used, then the adhesive sheet can be manufactured and applied, but separation between the substrate and adhesive layer occurs during unwinding or peeling, leading to poor anchoring performance
Solution Approach 1:
The invention uses a composite substrate structure consisting of a base fabric and a heteroatom-containing polymer layer (such as polyurethane with amino groups or heterocyclic groups). This composite structure creates strong chemical interaction with the silicone adhesive layer, preventing separation during unwinding or peeling operations while maintaining reliable anchoring performance in actual applications.
Solution Approach 2:
The invention modifies the substrate surface by introducing heteroatom-containing polymer components (nitrogen, oxygen, or sulfur atoms in specific functional groups) that change the chemical parameters of the substrate surface. This parameter change enables strong bonding with silicone adhesive through specific chemical interactions, resolving the substrate-adhesive separation issue.
2Ease of operation
If the adhesive layer is detached from the substrate for application, then the adhesive can be applied to the adherend, but the adhesive layer remains on the tape back surface causing stickiness issues
Solution Approach 1:
The invention applies different properties to different parts of the adhesive system: the front surface (adherend contact side) has high adhesion through the heteroatom-containing polymer layer, while the back surface (tape side) maintains release properties. This local quality differentiation allows easy application without stickiness issues on the tape back surface.
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 adhesive sheet exhibits excellent adherence and prevents substrate-adhesive separation, improving handling and storage stability while maintaining non-stickiness, even when used on skin or other adherends.
Implementation Method 1
The adhesive sheet exhibits excellent adherence, or in other words, high anchoring performance (anchor effect) between the silicone adhesive and the substrate
Implementation Method 2
Crosslinked adhesives can be used, and as one crosslinking method, in some cases, radiation crosslinking such as electron beam crosslinking may be used
Data Source
AI summary
The disclosed adhesive sheet that exhibits high anchoring performance and where separation between the substrate and the adhesive layer substantially does not occur when unwinding or re-peeling in actual applications. The adhesive sheet comprises a substrate including a heteroatom-containing polymer component at least at a portion of a surface a silicone adhesive layer that is in contact with the heteroatom-containing polymer component, wherein the heteroatom-containing polymer having, at a side chain, an N,N-substituted amino group or a heterocyclic group.