Laminated Insulating Glazing With Controlled Adhesion for Impact Resistance
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Solution Overview
Problem
Existing insulating glazings, including laminated and monolithic types, fail to provide sufficient impact/puncture resistance, burglar- and vandal-proof protection, and safety against glass breakage and severe weather, while maintaining a standard thickness and weight for easy installation.
Innovation Solution
A laminated glazing assembly with a specific adhesive interlayer thickness and adhesion value, combined with a gas layer, achieving a thickness of 3 to 6 mm, which enhances impact resistance and retains glass shards, meeting EN 12600 level 1B1 and EN 356 P1A standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laminated glazing is used to improve impact resistance, then safety and impact absorption are improved, but thickness and weight increase
Solution Approach 1:
The patent changes the adhesion parameter between glass and adhesive interlayer to a specific range (4-14 kJ/m²) to optimize the balance between impact resistance and weight. By controlling the adhesion energy within this range, the glazing achieves sufficient impact absorption while maintaining a thickness of 3-6 mm and manageable weight for installation.
Solution Approach 2:
The patent uses a composite structure consisting of glass sheets bonded with an adhesive interlayer. This composite material approach allows the combination of glass's strength with the adhesive's energy-absorbing properties, achieving high impact resistance without requiring excessive thickness or weight.
2Reliability
If adhesive interlayer thickness is increased to improve energy absorption, then impact resistance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent optimizes the adhesive interlayer thickness parameter within a specific range (0.38-1.90 mm) to achieve the required energy absorption capacity (30-60 kJ/m²) without excessive thickness. This parameter optimization balances energy absorption performance with manufacturing simplicity and cost-effectiveness.
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 laminated glazing assembly effectively absorbs kinetic energy, prevents glass breakage, and retains shards, ensuring safety and compliance with stringent impact and puncture resistance standards, while maintaining a standard thickness for easy integration.
Implementation Method 1
the value of the adhesion of the glass to the adhesive interlayer measured by the TCT method at 33 mm·s−1 and 20° C. is between 4 kJ/m2+8 kJ/m3×e(mm) and 14 kJ/m2+8 kJ/m3×e(mm)
Implementation Method 2
the adhesive interlayer has an opening resistance and a tear propagation resistance of greater than 30 kJ/m2
Implementation Method 3
an assembly of several parallel glazings separated by a cavity containing a gas, often insulating gas
Data Source
AI summary
An insulating glazing includes a parallel glazing assembly, two consecutive glazings in the assembly being separated by a cavity enclosing a gas layer, the insulating glazing including at least one laminated glazing, the at least one laminated glazing including two glass sheets between which is laminated an adhesive interlayer of thickness e, wherein the laminated glazing has a thickness of between 3 and 6 mm, the value of the adhesion of the glass to the adhesive interlayer measured by the TCT method at 33 mm·s−1 and 20° C. is between 4 kJ/m2+8 kJ/m3×e(mm) and 14 kJ/m2+8 kJ/m3×e(mm), and the adhesive interlayer has an opening resistance and a tear propagation resistance of greater than 30 kJ/m2.