Laminated Glass Retaining Element for Edge Adhesion
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Solution Overview
Problem
Conventional laminated panes face challenges in assembly safety, particularly in the roof region, where monolithic panes are preferred due to thickness, weight, and cost concerns, and the anti-scratch coating on protective sheets can cause adhesion issues with mounting adhesives.
Innovation Solution
A retaining element is integrated under the edge of the protective sheet, forming an edge connection and capture plane to securely retain glass shards, while being thin enough not to obstruct vision, and made of materials that allow intimate mechanical assembly with the adhesive layer and fixing elements, such as a woven strip that can be embedded in the adhesive layer or coated for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protective sheet with anti-scratch coating is applied to the glass surface, then the optical quality and scratch resistance are improved, but adhesion problems occur with mounting adhesives
Solution Approach 1:
The patent extracts the anti-scratch protective coating from the entire glass surface and limits it only to the central viewing area. The edge regions are left without coating to ensure proper adhesion of mounting adhesives and retaining elements, thus resolving the contradiction between scratch resistance and adhesion reliability
Solution Approach 2:
The protective coating is applied selectively only where needed (central viewing area) rather than uniformly across the entire glass surface. This local application maintains optical quality and scratch resistance in the viewing zone while ensuring adhesion compatibility in the edge regions for mounting purposes
2Reliability
If a retaining element is integrated under the protective sheet edge, then assembly safety and glass shard retention are improved, but the element may obstruct vision if too thick
Solution Approach 1:
The retaining element is designed as a thin, flexible strip that provides structural function for glass shard retention while minimizing visual obstruction. The thin film approach allows the element to perform its safety function without significantly impacting vision clarity through the protective sheet
Solution Approach 2:
The retaining element is positioned in the thickness dimension of the laminated structure rather than protruding into the visual field. By utilizing the z-dimension (thickness direction) for the retaining function, the element effectively provides assembly safety without obstructing the x-y plane vision clarity
3Weight of stationary object
If monolithic panes are used in the roof region, then thickness and weight are reduced, but adhesion problems occur with mounting surfaces
Solution Approach 1:
The patent removes the protective coating from the edge regions of monolithic panes, creating coating-free zones that ensure proper adhesion of mounting adhesives to the glass surface, thus resolving the adhesion problems while maintaining the weight advantages of monolithic construction
Solution Approach 2:
The protective coating is selectively applied only to the central area of the monolithic pane, leaving the mounting edge regions without coating. This local differentiation ensures both the weight reduction benefit of monolithic panes and reliable adhesion to the mounting 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 solution enhances assembly safety by securely retaining glass shards and providing a solid base for fixing elements without obstructing vision or causing optical defects, while avoiding adhesion issues with mounting adhesives, thus offering an alternative to traditional laminated panes with two rigid panes and an adhesive layer.
Implementation Method 1
a rigid pane (2), on which an adhesive layer (3) adheres at the surface
Implementation Method 2
a retaining element (5), which is arranged in an intimate connection in continuity of form and material under the edge of the protective sheet (4)
Data Source
Figure 1~3
Figure 4~7
AI summary
The invention concerns a laminated glass pane (1) with at least one rigid glass pane (2) and an adhesive layer (3) assembled thereto by surface bonding, whereby a protective and/or functional sheet (4) is applied on the rigid glass pane (2), wherein the protective sheet (4) is recessed relative to an outer edge of the rigid glass pane at least in some parts (E), as well as with at least one retaining element (5) arranged on the edge of the rigid glass pane (2) in the region of the recess(es) of the protective sheet (4), in which the retaining element (5) has, in accordance with the invention, a thickness corresponding more less, but corresponding preferably mostly to the thickness of the adhesive layer (3) at the edge of the protective sheet and is partly covered by the protective sheet (4) at least in the parts defined.