Borosilicate Glass Pane Stability and Weight Reduction
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Solution Overview
Problem
Existing glass panes for architectural glazing face a conflict between achieving low weight for size while maintaining sufficient stability, especially for large formats, where compact designs with low surface waviness are required, which has not been adequately met by state-of-the-art solutions.
Innovation Solution
A glass pane made of borosilicate glass with a thickness of at least 0.5 mm and up to 7 mm, featuring a low weight per unit area and surface fineness of less than 200 nm, allowing for increased stability and reduced weight, suitable for self-supporting applications and laminates, with specific compositions providing high chemical and thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the glass pane thickness is reduced to achieve low weight, then the weight per unit area decreases, but the stability and self-supporting capability deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the viscosity of the glass melt during hot forming. By adjusting viscosity parameters within a specific range (10^3 to 10^5 Pa·s at forming temperature), the process achieves optimal balance between glass pane thinness and structural stability, enabling production of panes with thickness of 0.5-7mm that maintain sufficient stability despite reduced weight
Solution Approach 2:
The patent implements preliminary action through pre-heating the glass blank to a specific temperature range before hot forming. This preliminary heating ensures the glass reaches the appropriate viscosity state prior to forming, allowing thin panes to be formed with controlled thickness and maintained stability without requiring excessive material
2Manufacturing precision
If the glass pane thickness is reduced to enable compact designs, then the surface fineness improves, but the mechanical strength and handling robustness deteriorate
Solution Approach 1:
The patent uses parameter changes by controlling the viscosity curve of the glass throughout the hot forming process. By maintaining viscosity within specific ranges at different stages (higher viscosity during forming, lower viscosity for surface finishing), the process achieves surface fineness of less than 200 nm while preventing mechanical failure during handling and installation
Data Source
AI summary
The invention relates to a glass sheet, in particular a glass sheet obtained by separation from a preferably floated glass ribbon formed by hot forming, in particular comprising a borosilicate glass, with a length of at least 1.15 m and a width of at least 0.85 m, with a thickness d of at least 0.5 mm, preferably at least 0.7 mm, and at most 7 mm, and uses thereof.