Safety glass is used as a regular alternative to glass in situations where broken glass could cause injury or death, especially in cars. It has been used since the early 20th century, but demand has increased dramatically as the benefits are implemented and standardized.
Origins
Safety glass was first conceived when he dropped a composite bottle containing cellulose in 1903 by the French scientist édouard Blessed. The glass shatters but retains its shape. Tempered glass was developed in the early 20th century, and was first patented by Austrian chemist Rudolf Seidan.
Development
In 1905 John Crew patented the use of a two-layer tree resin type of safety glass. The patented "ternary" polyvinyl butyral made in 1909 was two layers of glass. Safety glass found its first major use in gas masks in World War I
Types
There are two different types of safety glass laminated, and tempered. Laminated glass consists of two pieces of glass that are joined together by a plastic film. Tempered glass is a single piece of ordinary glass that has been heated and strengthened by cooling at a specific rate.
Advantages
Safety glass is used anywhere where heat would cause regular problems in the glass or where it would be dangerous if the glass broke. This is used in car windows, sliding glass doors in public buildings, windows, glass pots, oven doors and safety glasses.
Regulations
Regulations on the use and safety of glass strength began in developed countries in the 1960s, driving the safety development of the glass industry.