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Toughened glass

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  • Tempered glass is a safety glass that is used very commonly to serve many purposes. Tempered glass has specific properties that make it ideal for many applications that could be dangerous if tempered glass was not used.
  • Tempered glass is designed to be highly stronger and less likely to break than other glasses. In the event tempered glass does break, it shatters into hundreds of small, blunt fragments to prevent serious damage from harmful sharp and jagged edges.
  • Tempered glass is a heat resistant, making it 4 to 5 times stronger than any other glasses and harder to break. It is often referred to as "safety glass." Tempered glass is used for car windows (side and rear), oven windows, house windows, shower doors, and coffee makers.
  • Tempered glass is made strong by an extreme heat and then by rapid cooling process. The manufacturing process is what sets tempered glass apart from other types of glass. This same process is also what allows the tempered glass to be heat resistant.
  • Tempered glass is about four times stronger than "ordinary," or annealed, glass. Unlike annealed glass, which can shatter into jagged shards when broken, tempered glass fractures into very small, relatively harmless pieces.
  • Tempered glass is used in those environments where human safety is a big issue. Applications include entrance doors, shower and tub enclosures, racquetball courts, patio furniture and skylights.
  • In the toughening process, the surfaces of the glass are heated in a furnace. The recommended temperatures may vary but the glass reaches temperatures of over 600C. The hot glass is then immediately cooled by a blast of air over a period of between 3 and 10 seconds. As a result, the surfaces shrink and (at first) tensile stresses develop on the surfaces. Once the bulk of the glass begins to cool, it contracts.
  • Tempered glass is being imported into the United States in increased quantities. Aftermarket demand is weighted towards laminated rather than toughened glass.
  • The tempering process induces a superficial compressive residual stress state, closing the surface flaws and hence increasing the strength.
  • With increased transportation facilities, the demand of the product is heavily increasing and  especially in the automobile industry, railways, ships,  building both for production and replacement.
  • The fixed capital needed  comes around Rs.47,00,000 for Land and building. The total investment needed is about Rs.2,05,95,000. The turnover expected is around Rs.3,24,00,000.
  • The global market for the  Toughened Display Cover Glass is projected to reach US$4.3 billion by the year 2018, driven by the increasing demand for mobile devices, flat panel LCD televisions, and computers.

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