Multi-layer Glass Plate Edge Paint Coating for Air Bubble Prevention
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Solution Overview
Problem
The formation of air bubbles on the peripheral portion of multi-layer glass vehicle window panes due to prolonged exposure to air and atmospheric agents, particularly in frameless door windows, results in an aesthetically unpleasant effect.
Innovation Solution
Applying a protective polyurethane or acrylic paint coating along the peripheral edge of the glass pane, which insulates the contact area between the synthetic film and glass layers, preventing air bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the peripheral edge of the glass pane is exposed to air and atmospheric agents, then the glass pane structure is simplified and manufacturing is easier, but air bubbles form on the peripheral portion of the synthetic film causing aesthetic deterioration
Solution Approach 1:
The patent applies a protective paint coating that is relatively simple and inexpensive to apply, serving as a temporary or long-term protective layer that prevents air bubble formation without requiring complex structural modifications to the glass pane itself
Solution Approach 2:
The protective paint coating acts as a thin film layer on the peripheral edge of the glass pane, creating a barrier between the synthetic film and the external environment, thereby preventing air bubble formation while maintaining the simplified glass structure
2Object-affected harmful factors
If a protective coating is applied to the peripheral surface, then air bubble formation is prevented, but the manufacturing process becomes more complex and costly
Solution Approach 1:
The patent uses a relatively simple and inexpensive paint coating application method that does not require complex machinery or multi-step processes, thereby minimizing the increase in manufacturing complexity while still providing effective protection against air bubble formation
Solution Approach 2:
The protective coating modifies the surface properties of the peripheral edge by changing the material parameter from exposed synthetic film to painted surface, thereby altering the interaction with atmospheric agents and preventing air bubble formation without fundamentally changing the glass pane structure
Data Source
Figure 1~2
Figure 3~4
AI summary
In a motor-vehicle, the windshield and/or the rear window and/or one or more side windows or a roof window each comprise a multi-layer glass plate (3), including two glass layers (3A, 3B) with a film (5) of synthetic material interposed therebetween. At least along one part of the perimeter of the multi-layer glass plate (3), the peripheral surface (32) of the plate has a portion which is permanently exposed to air and atmospheric agents. In order to prevent the formation of air bubbles in the contact aria between the film of synthetic material and the plate layers, said peripheral surface (32) of the plate is covered by a paint protective coating (4).