The density of tempered glass is basically the same as that of ordinary glass. The density of glass is 2500 kg / m3, about 1 / 3 of that of steel.
Tempered glass is obtained by cutting ordinary annealed glass into required size, then heating to about 700 degrees of softening point, and then rapidly and evenly cooling (generally 5-6mm glass is heated for 240 seconds at 700 ℃ and cooled for 150 seconds. 8-10 mm glass is heated at 700 ℃ for about 500 seconds and cooled for about 300 seconds, After tempering, the surface of glass forms uniform compressive stress, while the inner part forms tensile stress, which improves the bending and impact strength of glass, which is more than four times of that of ordinary annealed glass
Advantages of toughened glass:
1. Its strength is several times higher than that of ordinary glass for sliding glass door wheels.
2. It is safe to use, its bearing capacity is increased, and its fragile property is improved. Even if the toughened glass is damaged, it is small fragments without acute angle, which greatly reduces the harm to human body. sliding glass door rollers The quench and heat resistance of toughened glass is 3-5 times higher than that of ordinary glass, and can withstand the temperature difference above 250 degrees, It is a kind of safety glass. It can provide qualified material safety for high-rise buildings.
The disadvantage of toughened glass: it is easy to explode.