Conductive Acrylic Adhesive Tape With Moisture Barrier Release Layer
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Solution Overview
Problem
Existing electrically conductive acrylic pressure sensitive adhesive tapes experience adhesion degradation due to moisture, particularly in high-humidity environments, and existing solutions either compromise adhesion or require additional sealing processes.
Innovation Solution
Incorporating a moisture barrier layer in the release layer of the adhesive tape to prevent moisture penetration and maintain adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metallic substrate layer is used to provide electrical conductivity, then electrical conductive performance is improved, but metal ions migrate to the adhesive layer and react with carboxylic acid components causing adhesion degradation
Solution Approach 1:
A moisture barrier layer is introduced as an intermediary component between the metallic substrate layer and the acrylic adhesive layer. This barrier layer prevents moisture from penetrating to the metal surface, thereby stopping the formation of metallocarboxylate and preventing adhesion degradation while maintaining electrical conductivity of the metal substrate.
Solution Approach 2:
The adhesive tape is segmented into distinct functional layers: a metallic substrate layer for electrical conductivity, a moisture barrier layer to prevent ion migration and moisture penetration, and an acrylic adhesive layer for bonding. This segmentation allows each layer to perform its specific function without interfering with others.
2Strength
If the adhesive tape is sealed to prevent moisture penetration, then adhesion is maintained, but physical damage may occur and additional sealing processes are required
Solution Approach 1:
The moisture barrier function is extracted from the overall sealing requirement and implemented as a specific functional layer within the adhesive tape structure. This eliminates the need for external sealing processes while maintaining adhesion by preventing moisture penetration through the inherent barrier layer.
3Stability of the object's composition
If N-vinylpyrrolidone monopolymer is used to substitute acid functional groups, then moisture-induced adhesion loss is prevented, but adhesion performance deteriorates due to lack of acid functional groups
Solution Approach 1:
Instead of modifying the acrylic adhesive to be moisture-resistant (which would remove necessary acid functional groups), a moisture barrier layer is introduced as an intermediary that protects the adhesive from moisture while allowing the adhesive to retain its full bonding capability through carboxylic acid components.
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 tape maintains adhesion in high-humidity conditions by effectively preventing moisture-induced adhesion loss, enhancing overall adhesion performance.
Implementation Method 1
a release layer stacked on one surface of the adhesive layer, wherein the release layer includes a moisture barrier layer
Data Source
AI summary
A pressure sensitive adhesive tape includes a substrate layer including metal, an adhesive layer stacked on one surface of the substrate layer and including an acrylic adhesive polymer resin and a conductive filler including metal, and a release layer stacked on one surface of the adhesive layer. The release layer includes a moisture barrier layer that includes a substrate film having one surface release-treated and a barrier coating layer.