Adhesive Sheet with Aligned Carbon Nanotube Base
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Solution Overview
Problem
Conventional adhesive sheets with thin bases are prone to rupture when subjected to mechanical stress, and thickening the adhesive layer to prevent rupture results in an undesirable thickness for certain applications.
Innovation Solution
A carbon nanotube sheet with aligned carbon nanotubes is used as a base, combined with an adhesive agent layer, where the carbon nanotube sheet has a rupture elongation of 10% or more, and the total thickness of the adhesive sheet is maintained at 10 µm or less, with optional adhesion inhibiting layers to prevent unintended adhesion and exudation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the base is thinned to reduce overall thickness, then the adhesive sheet can be made thinner for small-sized applications, but the base becomes weaker and more prone to rupture under mechanical stress
Solution Approach 1:
The invention uses a composite structure combining a thin base with a carbon nanotube sheet layer. The carbon nanotube sheet, with its exceptional tensile strength and elasticity, reinforces the thin base to prevent rupture while maintaining overall thinness. This composite approach allows the base to be thinner than conventional designs without sacrificing strength.
Solution Approach 2:
The carbon nanotube sheet is selectively applied to specific regions where strength is needed, such as areas subject to pulling, piercing, or hitting forces. This localized reinforcement allows the base to remain thin in non-critical areas while providing enhanced strength where required.
2Strength
If the adhesive agent layer is thickened to prevent base rupture, then the base can be used as a core for double-sided adhesive sheets, but the overall adhesive sheet thickness increases beyond acceptable limits
Solution Approach 1:
The carbon nanotube sheet serves as a reinforcing layer within the adhesive sheet structure, allowing the adhesive agent layer to be thinner while maintaining overall strength. The carbon nanotubes' high tensile strength compensates for the reduced adhesive layer thickness, enabling the base to function as a core for double-sided adhesive sheets without requiring excessive adhesive material.
Solution Approach 2:
The invention changes the mechanical properties of the adhesive sheet by incorporating carbon nanotubes, which have exceptional strength-to-weight ratio. This allows the adhesive layer thickness to be reduced while maintaining or improving overall sheet strength, thereby controlling the total thickness within acceptable limits for small-sized applications.
Data Source
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AI summary
An adhesive sheet includes: a carbon nanotube sheet including a plurality of carbon nanotubes aligned preferentially in one direction within a plane of the sheet; and an adhesive agent layer including an adhesive agent, in which a rupture elongation of the adhesive sheet is 10% or more.