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Bulletproof Glass

Engineering
by

divkat ananman

on 13 September 2012

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Transcript of Bulletproof Glass

When Was it Invented, and Who Invented It? Bulletproof glass was invented on accident by French chemist Edward Benedictus in 1903. Benedictus had been working with plastic cellulose nitrate, which had dried in the glass flask that he was using. This created a coating on the inside of the glass, and when he accidentally knocked over the class, instead of it shattering, it kept intact, but the cracks were still visible. Patents Once Benedictus had perfected his discovery, he received a patent for laminated shatterproof glass in 1903 itself. How was this Product Originally Made? Improvements That Have Been Made Since Then Who Uses this and What Impact Does it Have on Society? Laminated shatterproof glass has been used in automobiles for windshields since 1927. This has reduced the chance of people flying out through the windshield of a car in case of an accident, which in turn has increased the chances of people surviving a car accident even if they weren't wearing a seat belt. Banks also used an innovation of laminated glass, and put together multiple layers of this glass to create bulletproof glass. This glass is also used on the windows of skyscrapers so it's safer in case of an earthquake or any other natural disaster. Tempered glass is an innovation of this laminated shatterproof glass. Since this glass is heated much more, it makes the glass about five to ten times stronger. When it breaks, it doesn't shatter into big sharp pieces, it only breaks into tiny pebble-like pieces, which are less likely to hurt people that come into contact with it. Tempered glass is used on the windows of automobiles so that when a car is stuck in a perilous situation, it would be easier to kick the glass windows out, and it would lessen the risk of injury. Tempered glass is also used for making drinking glasses, especially for small kids, because it is safer than untempered glass in case it is accidentally dropped. The product was originally made by Edward Benedictus, and the laminated quality was given by the plastic cellulose nitrate. The inside of the glass was coated with this chemical, and it prevented the glass from shattering when dropped. It has also been discovered that putting multiple layers together can create bulletproof glass, which is another innovation that has been used since then. Laminated glass also helps block 99% of all UV rays, which controls the amount of sunlight and heat that reaches the inside of the car. This also protects passengers from excessive radiation while traveling. Laminated glass is also used for shop windows and shower doors. It's also used for sound protection, and it's fairly easy to install. Changes that We Would Make Sources http://www.google.com/patents/US4925725
http://www.todayifoundout.com/index.php/2011/11/laminated-glass-was-invented-by-accident/
http://www.ehow.com/about_5395196_laminated-vs-tempered-glass.html
http://www.thehomeimprovementcentre.com/double-glazing/toughened-laminated-or-standard-plate-glass
http://products.construction.com/swts_content_files/56424/E821291.pdf
http://www.google.com/patents/US4925725
http://laminatedwindowsinfo.com/understanding-the-pros-and-cons-of-laminated-glass-and-its-application/
In 1975, Monsanto Company received a patent for the interlayer of laminated glass. In 1994, Monsanto Company once again received a patent for a rough-surfaced interlayer of laminated glass. In 2000, 2005, and 2006, Seisuki Chemical Co., Ltd. received patents for the interlayer of laminated glass. Currently, the price of laminated glass is very high. If we could make a change, we would make the production of glass cheaper and more affordable for everyone in order for them to maintain a safe lifestyle. Today, material and civil engineers are known to study laminated, tempered, untempered, and other forms of glass today to create products that consumers can use safely. Laminated Shatter-proof Glass By: Dhivyaa Anandan and Karissa Smola
Period 2 - IED
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