http://www2.dupont.com/SafetyGlass/en_US/index.html?scr=youtube_dupont_sentry_01 If it can be made out of glass, it can be made safer, stronger, more durable and storm resistant with SentryGlas®. Laminated glass, such as DuPont™ SentryGlas®, was developed as a safer and stronger alternative to glass. When used as a design or structural element, DuPont™ SentryGlas® can withstand threats from natural and man-made disasters. Stephen Bennison, s Senior Technical Associate, and Valerie Block, an Architectural Marketing Specialist, from DuPont discuss the history of laminated glass and the safety benefits of laminated glass solutions.
Stephen Bennison, Senior Technical Associate DuPont™ SentryGlas®: Well laminated glass is a certain class of safety glass. where glass is combined with a tough plastic. And what it essentially does is it takes all the good things about glass being, transparent, clear and durable. But, essentially deals with a problem with glass which is, its brittleness.
Valerie Block, Architectural Marketing Specialist DuPont™ SentryGlas®: And, the feature thats the most important feature about laminated glass, as opposed to the other glass products, is after breakage occurs, because the glass pieces stick to the interlayer material, as opposed to falling out of the opening onto the ground, or flying through the air and actually causing other injury.
Stephen Bennison: As you all know, if , glass gets broken, it can provide, cutting hazards. By combining the glass with the polymer what happens is essentially the polymer holds together the broken glass and reduces the risk of, of injury, to the people.
Stephen Bennison: Well, DuPont first got involved in, , the interlayer market for laminated glass, , really at the request of the U.S. government. That was back in the 1930s, when, , the automotive the early automotive industry real realized it had a tremendous problem, , with the, , safety of glass in car, , windshields.
Valerie Block: As I understand it, it was a joint research project that involved a number of glass manufacturers, and interlayer suppliers, through the Franklin Institute in Philadelphia. So it was actually a research project that was considered to be of utmost importance, because of the issue of occupant and driver safety. And then, in the 1970s, there was a safety glazing standard that was passed in Washington, D.C., which effectively led glazers to use laminated glass in hazardous locations. At that point, they looked to the standard PVB that had been used in automotive applications, for this new safety glazing architectural application. So essentially, it just hopped from automotive into the architectural setting.
Stephen Bennison: Now in the early 1990s, in Florida, especially, after Hurricane Andrew, there was a realization that they needed to do an awful lot more about improving the construction and, the sturdiness of, houses and buildings down there, to essentially deal with the risk of hurricane, hurricane damage.
Valerie Block: The Building Department in South Florida decided to institute a testing program, standards, and building code requirements for glazing. And, laminated glass became the natural choice, because the glass retention features of laminated glass made it an excellent choice to resist any kind of flying debris that would occur during a hurricane. the original interlayer, PVB, polyvinyl butyral, was successful in some applications, but in others, it was not the best choice for an interlayer, and that led us to go back to develop a stronger, stiffer interlayer, which was SentryGlas®
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4:57Safety Glass: Uses and Applications of Laminate...by DuPontCompany1,130 views
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