Tempered glass is made by processes which create balanced internal stresses which give the glass strength.
In the tempering process, the glass is heated at above softening point (~550℃). Then, the surfaces of the hot glass at 600~700℃ are cooled rapidly by a blast of air. As a result, the surfaces shrink, and at first tensile stresses develop on the surfaces. As the bulk of the glass begins to cool, the interior portion contracts. The already solidified surfaces of the glass are then forced to contract, and consequently, they develop residual compressive surface stresses, while the interior develops tensile stresses. The strength can be increased by 3 ~ 5 folds.
The safety provided by tempered glass:
| 1. |
have a substantial increase in strength and stiffness by 3 to 5 times, not easy to bend and break. |
| 2. |
have high hardness and scratch resistance. |
| 3. |
Endure thermal shock up to about 200 ℃ without breaking. |
| 4. |
Resist the mechanical impact by the drop of Cr-steel ball from 100 cm height. |
| 5. |
Shatter into small pieces instead of large and sharp pieces when broken, making it less likely to cause severe injury. |
Therefore, we highly recommend the tempered glass for the places requiring strength, abrasion, impact, or thermal shock.
Specification of tempered glass:
| Thickness |
The largest size |
The smallest size |
Applications |
| 2mm(hardened)~4mm |
1200mm X 2100mm |
50mm φ |
widely used as panels, windows, or doors for lightings, buildings, machines, TV monitors, LCD touch panels, etc. |
| 5mm~19mm |
2400mm X 5100mm |
50mm φ |
|
