Composite Adhesive Structure for Strong Bonding and Clean Peeling
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Solution Overview
Problem
Pressure-sensitive adhesive sheets used in electronic equipment production face challenges in achieving both high adhesion and followability to complex surfaces without leaving residue, as increased adhesion strength often leads to sheet breakage or adhesive layer separation during peeling.
Innovation Solution
A composite structure featuring a flexible shaft member with a film-like pressure-sensitive adhesive part, surrounded by fibers, allows for excellent adhesion and followability by enabling the adhesive part to move freely and conform to surface shapes, while the flexible shaft member provides repulsive force for better adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the adhesive strength is increased to achieve firm fixation, then the adhesion improves, but the pressure-sensitive adhesive sheet becomes difficult to peel and may break during peeling operation
Solution Approach 1:
The invention divides the adhesive sheet into multiple independent adhesive elements (adhesive protrusions) rather than using a continuous adhesive layer. This segmentation allows individual elements to deform and follow surface contours while maintaining overall adhesion, and enables cleaner peeling as elements can detach independently without causing sheet breakage
Solution Approach 2:
The adhesive protrusions are formed with a flexible structure that allows them to deform and conform to complex surface shapes. The protrusions can elastically deform to follow surface contours during application, then return to their original shape during peeling, facilitating easier removal while maintaining strong adhesion during use
2Adaptability or versatility
If the adhesive layer is made soft with good elongation to follow complex surface shapes, then the followability improves, but adhesive residue is caused when peeling
Solution Approach 1:
By segmenting the adhesive layer into discrete protrusions, each element can independently deform to follow surface contours without requiring the entire adhesive layer to be soft and elastic. This segmentation allows the use of adhesives with lower elongation properties while still achieving good followability, and reduces adhesive residue during peeling as elements can detach more cleanly
Solution Approach 2:
The adhesive protrusions provide dynamic adaptability through their three-dimensional structure, allowing them to deform and conform to surface shapes during application, then maintain their structural integrity during peeling. This dynamic behavior enables followability without requiring the adhesive material itself to have high elasticity, thereby reducing residue formation
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 composite achieves both excellent adhesion and followability to complex surfaces, reducing the risk of residue and sheet breakage, and can be used for temporary fixing in production processes, such as recycling and unmanned aircraft applications.
Implementation Method 1
a pressure-sensitive adhesive part arranged at a distal end of the shaft member
Data Source
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AI summary
The invention provides a composite capable of achieving both excellent followability to an adherend and excellent adhesion. The composite has a support and a plurality of structures fixed to at least one surface of the support, and the structure has a shaft member consisting of a flexible material extending from a proximal end fixed to the support, and an adhesive part arranged at a distal end of the shaft member.