Hurricane-acoustic Glazing Barriers Using New Interlayer Technology

Overview

Authors

Photo of Stephen J Bennison, B.Sc., M.S., Ph.D.

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


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.

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

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