Lightweight composite disc and method for manufacturing a lightweight composite disc

A lightweight composite window pane with a mineral glass or glass-ceramic layer and an organic layer achieves thermal safety and high transparency by optimizing thickness ratios and limiting organic layer thickness, addressing the limitations of existing panes in aviation.

DE112014003412B4Active Publication Date: 2026-08-27SCHOTT AG
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Patent Information

Application Number
DE112014003412
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2013-07-24
Filing Date
2014-07-11
Publication Date
2026-08-27
Estimated Expiration
2034-07-11

AI Technical Summary

Technical Problem

Existing composite window panes fail to meet the stringent thermal safety requirements, particularly in aviation applications, while maintaining low weight, high optical transparency, and good scratch resistance.

Method used

A lightweight composite window pane comprising a mineral glass or glass-ceramic layer and an organic layer with a specific thickness ratio and limited organic layer thickness, achieving a basis weight of 0.5 to 5.5 kg/m² and a heat release rate below 65 kW/m² within 2 minutes, along with high transparency and scratch resistance.

Benefits of technology

The composite pane meets aviation thermal safety standards, with a heat release rate of less than 65 kW/m², afterburn time of less than 15 seconds, and transparency greater than 80%, while maintaining a low basis weight and excellent scratch resistance.

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Abstract

The present invention relates to a lightweight composite panel comprising a mineral glass or glass-ceramic panel and an organic layer. The basis weight of the lightweight composite panel is in the range of 0.5 kg / m². 2 up to 5.5 kg / m² 2 The ratio of the thickness of the mineral glass pane to the thickness of the organic layer is 1:0.01 to 1:1, and the thickness of the organic layer is less than or equal to 500 µm. The lightweight laminated pane meets the thermal safety requirements of aviation authorities and exhibits a total heat release, measured in accordance with JAR / FAR / CS 25, App. F, Part IV & AITM 2.0006, of less than 65 kW x min / m². 2and an afterburn time of less than 15 seconds after flame removal in the "Vertical Bunsen Burner Test", measured in accordance with FAR / JAR / CS 25, App. F, Part I & AITM 2.0002A. The invention further relates to a lightweight window pane, in particular an inner pane of an aircraft window, and a smoke barrier element.
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