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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 .
Toughened glass is processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. [6] Tempering, by design, creates balanced internal stresses which causes the glass sheet, when broken, to crumble into small granular chunks of similar size and shape instead of splintering into random, jagged shards.
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 ...
Safety and security films are used where there is a potential for injury from broken glass (such as glass doors or overhead glazing). These films can be applied to toughened, annealed, or laminated glass. They are available in various thicknesses, from 100 micrometers (or 4 mils minimum 2 ply) through to 525 micrometers + (21 mils).
Also unlike toughened glass, chemically strengthened glass may be cut after strengthening, but loses its added strength within approximately 20 mm of the cut. Similarly, when the surface of chemically strengthened glass is deeply scratched, this area loses its additional strength. Another negative of chemically strengthened glass is the added cost.
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.
Automobile glass (e.g. windshields, windows, mirrors) [23] Mirrors [24] Furniture (e.g. in tables and shelves) [25] Insulated glass; Windows [26] and doors; Most forms of specialized glass such as toughened glass, [27] frosted glass, [28] laminated safety glass [29] and soundproof glass [30] consist of standard float glass that has been further ...
A typical installation of insulated glass windows with uPVC frames. Possibly the earliest use of double glazing was in Siberia, where it was observed by Henry Seebohm in 1877 as an established necessity in the Yeniseysk area where the bitterly cold winter temperatures regularly fall below -50° C, indicating how the concept may have started: [2]
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