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Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering puts the outer surfaces into compression and the interior into tension .
In automobiles, the laminated glass panel is around 6.5 mm (0.26 inches) thick, in comparison to airplane glass being three times as thick. [21] In airliners on the front and side cockpit windows, there is often three plies of 4 mm toughened glass with 2.6 mm thick PVB between them.
Common designs include toughened glass (also known as tempered glass), laminated glass, and wire mesh glass (also known as wired glass). Toughened glass was invented in 1874 by Francois Barthelemy Alfred Royer de la Bastie. [1] Wire mesh glass was invented in 1892 by Frank Shuman. [2] [3] Laminated glass was invented in 1903 by the French ...
Toughened (tempered) glass can produce showers of small glass pellets that can cause serious injury, especially in the event of a car crash, as most automotive side glass is tempered. The building codes of some countries specify requirements for personal safety in architectural glass and glazing.
Until the 16th century, window glass or other flat glass was generally cut from large discs (or rondels) of crown glass. Larger sheets of glass were made by blowing large cylinders which were cut open and flattened, then cut into panes. Most window glass in the early 19th century was made using the cylinder method. The 'cylinders' were 6 to 8 ...
Toughened (or tempered) glass is made from standard Float Glass to create an impact resistant, safety glass. Broken float glass yields sharp, hazardous shards. The toughening process introduces tensions between internal and external surfaces to increase its strength and ensure in the case of breakages the glass shatters into small, harmless ...
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