How Are Car Door Windows Made?
Car door windows are not the simple glass panes you might find in residential windows. Instead, every precaution is taken to ensure their safety to deal with the stresses involved in driving.
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Standard Safety Glass
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Car door windows break into harmless chunks rather than dangerous shards. Standard auto safety glass was invented in 1909 by a French scientist who failed to immediately see its greater potential. It consists of two sheets of pane glass with sheets of laminate plastic sandwiched between them. The result is a glass panel that, if broken, holds its shape and cracks in a webbed pattern rather than shattering into dangerous shards.
Heat Treated Safety Glass
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Heat treating is the second way to make auto glass. By tempering glass under very high temperatures, a harder, more crack-resistant material is made. This tempered glass, when coupled with laminate, creates auto safety glass that not only is very hard to break and resistant to shock but also fractures into harmless chunks when shattered.
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Other Uses
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Auto safety glass is used in car doors, of course, but it is also widely used in safety and construction equipment from work goggles, to welding shields, to oven windows and high-rise building exoskeletons.
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References
- Photo Credit raindrops on car window image by Alison Bowden from Fotolia.com broken car window glass image by Nino Pavisic from Fotolia.com
