Hurricane-acoustic Glazing Barriers Using New Interlayer Technology
Presented on August 5, 2020 at Facade Tectonics 2024 World Congress
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Overview
Abstract
In the last twenty years we have seen the development of polymer interlayers for laminated glass where the resin compositions have been optimized for a specific end-use application. It is well know that optimum hurricane-resistant laminated glass performance can be attained using stiff, ionomer-based interlayers and that optimum acoustic barrier performance can be attained using compliant, high-damping PVB interlayers. The material property requirements for these two applications are diametrically opposite. In this contribution we present a new class of interlayers that provides high acoustic barrier performance in combination with high hurricane-resistance performance. The interlayer is a multilayer polymer structure using a combination of an ionomer with a thermoplastic elastomer. Performance may be balanced and tuned by varying polymer composition and the film structure. Here we present one solution using this new technology for high acoustic barrier performance, hurricane-impact and cycling performance and improved laminate strength and deflection over acoustic PVB interlayers.
Authors
Stephen J Bennison, B.Sc., M.S., Ph.D.
Research Fellow
Kuraray
stephen.bennison@kuraray.com
Alejandro G Gonzalez
Sales and Marketing
Kuraray
Alejandro.Gonzalez@kuraray.com
Charles Anthony Smith
Research Scientist
Kuraray
anthony.smith@kuraray.com
Rebecca L Smith
Research Scientist
Kuraray
Rebecca.Smith@kuraray.com
Takuya Kobayashi
Research Scientist
Kuraray
Takuya.Kobayashi@kuraray.com
Toshiyuki Iguchi
Engineering Manager
Kuraray
Toshiyuki.Iguchi@kuraray.com
Keywords
Introduction
Laminated glass is now used for functionality that far exceeds its historical basic safety performance. In most applications the polymer interlayer imparts improved barrier or structural properties over monolithic glass
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Approach
The approach has been to combine an ionomer polymer with a thermoplastic elastomer (TPE) in a coextruded trilayer polymer sheet. The ionomer outer layers are based on the same ionomer
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Laminated Glass Samples
All laminates evaluated in this study comprised of two plies of 6 mm heat strengthened (HS) glass in combination with an interlayer with a total thickness of approximately 2.3 mm
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Testing
Hurricane Impact and Wind Cycling
For architectural uses in coastal areas, a glass/interlayer/glass laminate must pass a simulated hurricane impact and pressure cycling test which measures resistance of the laminate to
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Results
Hurricane Impact and Pressure Cycling
Figures 2 shows a picture of two laminate constructions that have been subjected to large missile impact and pressure cycle hurricane resistance testing following ASTM E1996-2017
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Conclusions
The research presented here shows that combined high hurricane resistance and sound barrier performance properties may be achieved with new combinations of interlayers. Specifically combining an ionomer/thermoplastic elastomer (TPE) trilayer