Adhesive Member with Microp Protrusions for Residue-Free Detachment
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Solution Overview
Problem
Existing adhesive members face challenges in achieving strong and directional adhesion, making it difficult to peel off the adhesive without leaving residue on the adherend, and requiring improved productivity and adhesion performance.
Innovation Solution
An adhesive member with a base material having an uneven shape featuring protrusions and recesses, covered by a surface layer with specific thickness and material properties, allowing for excellent adhesion and directional dependence of adhesive strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a chemical adhesive is used to adhere a base material and an adherend, then strong adhesion is achieved, but it becomes difficult to peel off the adhesive and the adhesive remains on the adherend
Solution Approach 1:
The adhesive member is segmented into a base material and a surface layer with microp protrusions, where the surface layer can be detached while the base material remains, enabling easy removal without adhesive residue
Solution Approach 2:
The surface layer acts as an intermediary between the base material and the adherend, providing strong adhesion when attached but allowing clean detachment, thus mediating between strong bonding and easy removal
2Adaptability or versatility
If adhesive members with microp protrusions mimicking gecko footpad are used, then directional adhesion is achieved, but productivity is reduced due to complex manufacturing
Solution Approach 1:
The surface layer is formed as a thin film with microp protrusions that can be easily applied to the base material, combining complex microstructure with simple manufacturing process
Solution Approach 2:
The adhesive member uses a composite structure of base material and surface layer, where each layer can be manufactured separately using different processes, improving overall productivity while maintaining directional adhesion
3Strength
If the surface layer completely covers the protrusions, then adhesion strength is improved, but the space between bottom surface and surface layer is reduced
Solution Approach 1:
The surface layer covers at least a portion of the protrusions but not necessarily all of them, allowing optimization between adhesion strength and internal space based on specific application requirements
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 member exhibits superior adhesion with an adherend while allowing for easy detachment without residue, enhancing productivity and reusability, and maintaining semipermanent adhesion or releasing adhesion upon specific directional force application.
Implementation Method 1
it has been studied to adhere a base material and an adherend by utilizing a physical action, such as a van der Waals force or an atmospheric pressure
Implementation Method 2
the surface layer and the base material have a storage elastic modulus at 25°C of from 5 MPa to 1 GPa
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Provided is an adhesive member including: a base material having an uneven shape on at least one surface; and a surface layer covering at least a portion of the surface having the uneven shape on the base material.