Laminated Glazing Thick Adhesive Interlayer Web Conformity
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Solution Overview
Problem
The manufacturing of laminated channel-section glazings is complicated by thickness variations across the web, leading to issues with interfacial adhesion and bubble formation, which existing methods struggle to address effectively.
Innovation Solution
A laminated glazing design featuring a channel-section glazing element with a web and flanges, where a thick adhesive interlayer conforms to the web's uneven surface, and a thin flat glass sheet is used, allowing the interlayer to flex and adapt to the surface irregularities, with the interlayer thickness varying to accommodate ±20% changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional lamination method is used with a channel-section glazing element having web thickness variations, then the manufacturing process becomes complex and difficult, but using a thick adhesive interlayer and thin flat glass sheet simplifies manufacturing by improving adhesion and reducing bubble formation
Solution Approach 1:
The patent changes the thickness parameters of the adhesive interlayer and glass sheet to resolve the contradiction. Specifically, it uses a thick adhesive interlayer (1.52mm) combined with a thin flat glass sheet (3mm), which allows the thick interlayer to conform to the web's uneven surface while the thin glass sheet remains manageable and provides sufficient structural integrity, thereby simplifying the lamination process despite web thickness variations
Solution Approach 2:
The thick adhesive interlayer acts as an intermediary that compensates for the web's surface irregularities. It conforms to the uneven web surface and provides a flat bonding surface for the glass sheet, mediating between the irregular web and the requirement for a flat lamination surface, thus improving adhesion and reducing bubble formation
2Reliability
If a thick adhesive interlayer is used to compensate for web thickness variations, then adhesion improves and bubble formation reduces, but the interlayer must accommodate significant thickness variations (±20%)
Solution Approach 1:
The patent specifies precise thickness parameters for the adhesive interlayer (1.52mm) and glass sheet (3mm) to achieve reliable adhesion while accommodating web variations. The thick interlayer provides sufficient compliance to handle ±20% thickness variations in the web, ensuring consistent bonding across the entire lamination surface
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
This design simplifies manufacturing by improving adhesion and reducing bubble formation, enabling the production of high-quality laminated glazings with enhanced surface conformity and flexibility.
Implementation Method 1
the interlayer in the laminated glazing has a thickness between 0.8mm and 2.3mm. The thick adhesive interlayer is able to conform to the inner surface of the web and the thin flat glass sheet is able to flex slightly to compensate for the uneven lamination surface of the web
Data Source
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AI summary
A laminated glazing comprising a channel-section glazing element and a sheet of glazing material laminated thereto is described. The channel-section glazing element has a web and at least one flange. The sheet of glazing material is laminated to the web via an adhesive interlayer characterised in that the sheet of glazing material has a thickness of 3.5mm or less. The adhesive interlayer prior to being incorporated in the laminated glazing has a thickness of greater than 0.76mm.