Silane-Coupled Dielectric Adhesive Sheet for Low-Energy Glass Joining
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Solution Overview
Problem
Existing dielectric heating adhesive films, such as those described in Patent Literature 1, do not provide sufficient bonding strength to glass materials, and there is a need for a method to bond glass adherends with high strength using low energy consumption.
Innovation Solution
A high-frequency dielectric heating adhesive sheet containing a thermoplastic resin with reactive sites, a dielectric material, and a silane coupling agent, optimized in terms of volume content ratios, functional groups, molecular weight, and particle sizes, is used to bond glass adherends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional dielectric heating adhesive film is used, then the bonding process can be performed, but the bonding strength to glass is insufficient
Solution Approach 1:
The adhesive film uses a composite structure consisting of a polyolefin resin base layer and a silane coupling agent layer. This composite material design allows the silane coupling agent to specifically interact with glass surfaces through chemical bonding, while the polyolefin resin provides bulk adhesive properties, thereby achieving high bonding strength to glass substrates.
Solution Approach 2:
The silane coupling agent acts as an intermediary substance between the polyolefin resin and the glass surface. It contains both organic functional groups that interact with the resin and inorganic components that bond with glass, serving as a chemical bridge to enhance interfacial adhesion and overall bonding strength.
2Strength
If high bonding strength is achieved through conventional methods, then strong bonding is obtained, but energy consumption is high
Solution Approach 1:
The invention changes the bonding parameters by using dielectric heating at specific frequencies (2.45 GHz or 5.8 GHz) and controlling the thickness of the silane coupling agent layer (1-10 μm). These parameter optimizations enable efficient energy transfer and localized heating, achieving strong bonding with reduced overall energy consumption compared to conventional high-temperature methods.
Solution Approach 2:
The dielectric heating process uses periodic electromagnetic waves at high frequency to generate heat within the adhesive film through dipole rotation and molecular friction. This periodic energy input is more efficient than continuous conventional heating, as it directly energizes the adhesive molecules to facilitate bonding at lower overall energy consumption.
3Strength
If the silane coupling agent layer is made thicker to improve bonding, then adhesion may improve, but dielectric loss and energy inefficiency increase
Solution Approach 1:
The invention optimizes the thickness parameter of the silane coupling agent layer to a specific range of 1-10 μm. This precise parameter control ensures sufficient chemical bonding sites for strong adhesion while minimizing the volume of dielectric material that would cause energy loss, achieving the optimal balance between bonding strength and energy efficiency.
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 achieves high bonding strength to glass adherends with low energy consumption, providing a strong and efficient bonding method.
Implementation Method 1
a dielectric material that generates heat upon application of a high-frequency electric field
Data Source
AI summary
A high-frequency dielectric heating adhesive sheet includes an adhesive layer. The adhesive layer contains a thermoplastic resin having a reactive site, a dielectric filler that generates heat upon application of a high-frequency electric field, and a silane coupling agent.