Shatterproof Glass

Shatterproof Glass

Totaled cars but intact glass.

History

Spider webs.

Manufacturing Process

Laminated Glass

Shatterproof lenses.

Invented in 1903 by the French chemist Edouard Benedictus after a laboratory accident. A flask was coated with Cellulose Nitrate. It fell and shattered but didn't break into large pieces. He used the Cellulose Nitrate to coat the windshield of cars. But the first widespread use of the glass was used in World War 1 gas masks.

1) The first method utilizes two or more pieces of glass bonded between one or more pieces of plasticized polyvinyl butyric resin using heat and pressure. 2) The second method uses two or more pieces of glass and polycarbonate, bonded together with aliphatic urethane interlayers under heat and pressure. 3) The third type of laminated glass is interlaid with a cured resin.

Laminated glass doesn't break into pieces when shattered. When broken, it stays together with an interlayer of Polyvinyl Butyral. It keeps it bonded together and produces the spider web cracking pattern.