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The History of Bulletproof Glass

Created by Douglas Swanitz and Cody Essary

Doug Swanitz

on 9 September 2013

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Transcript of The History of Bulletproof Glass

Douglas Swanitz and Cody Essary
Invented in 1625 by an unknown scientist and in 1903 by french chemist and painter named Edouard Benedictus
1625- Glass objects were made by putting molten glass into water to rapidly cool it. They later figured out that the glass could withstand a blow from a hammer and was called Prince Rupert's Drops; this is considered a precursor to the invention of bulletproof glass
1903- Invented by accident when Benedictus dropped a beaker coated with a plastic cellulose nitrate and the beaker cracked but did shatter.
Patents of Bulletproof Glass
There are hundreds of patents existing that involves bulletproof glass
Ex: Patent #DE102011107438 A1 is a transparent bulletproof glass used in many military vehicles and for many other uses
What is it Made of?
There have been many improvements including:
Using more layers of tempered glass
Heating the glass to 620 Celsius to harden the molecules so that when broken it shatters into round pieces
Added polycarbonate plastic that is flexible and resilient
Using a two types of glass together to make one-sided bulletproof glass
Who Uses The Product?
Armored Vehicles
One-way Bullet-proof Glass
Transparent Armor Gun Shield
Windows of police cars
Security Companies:
To keep high profile people safe (the President, the Pope, etc.)
To keep private and commercial assets safe

It was first made with a plastic cellulose nitrate that covered a glass beaker.
Today it is typically made from a series of glass layers that are laminated with plastic polycarbonate sheets, then glued together with ethylene-vinyl acetate. All of this comes out to be about three inches thick.
What improvements have been made?
Timeline of Bulletproof Glass
Who & When?
Discovered by an unknown scientist that used water to rapidly cool molten glass
Considered to be a precursor of bulletproof glass

Discovered by accident by Edouard Benedictus when he dropped a beaker covered with a plastic cellulose nitrate
It was used in World War I for gas mask lenses
It was used in World War II as armor for vehicles and soldiers
What is the impact on society and the environment?
Society: It provides security for people who can afford it and has created innovation in the production of plastics and glass.
Environment: According to tssbulletproof.com a LEED v4 ( Leadership in Energy and Environmental Design) standard advised avoiding polycarbonate, including polycarbonate-based bullet resistant glass, due to human exposure to chemicals
How would we change/ innovate it?
For military use a sensor of some kind could be placed in the glass so that when it was struck with enough force (impact of a bullet) it would send data to the soldier(s) telling them the general location/direction that the object (bullet or explosive) came from.
Going "Green" With Bullet Proof Glass. (2012, November 22). Retrieved from www.tssbulletproof.com

Harper, C. (n.d.). The uSe of Bullet Proof Glass. Retrieved from www.ehow.com

History of Bullet Proof Glass. (n.d.). Retrieved from www.angelfire.com

"Bulletproof Glass." Wikipedia. Wikimedia Foundation, 09 June 2013. Web. 08 Sept. 2013.
History of Bulletproof Glass

Engineering Disciplines
The main engineering discipline for bulletproof glass is chemical engineering.
It was first discovered because through the use of a chemical called plastic cellulose nitrate which was applied to glass.
And today they still innovate bulletproof glass through the use of different chemicals and chemical processes.
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