Tempered glass is a kind of prestressed glass. In order to improve the strength of the glass, chemical or physical methods are usually used to form compressive stress on the surface of the glass. When the glass receives external force, it first offsets the surface stress. Pressure, cold and heat, shock and so on.
The main advantages of tempered glass
The first is that the strength is improved several times compared to ordinary glass, the bending strength is 3 ~ 5 times that of ordinary glass, and the impact strength is 5 ~ 10 times that of ordinary glass , Increasing strength and safety
The second is the safety of use. The load-bearing capacity can be increased to improve the fragile properties. Even if the tempered glass is damaged, it has small fragments without acute angles, which greatly reduces the damage to the human body. There are 2 ~ 3 times more progress, and it is generally acceptable to change the temperature difference above 150 LC, which has a significant effect on avoiding thermal cracking.
Disadvantages of tempered glass
The first is that the tempered glass can no longer be cut and processed. It can only be processed to the required shape before tempering, and then tempered.
The second is that although the strength of tempered glass is stronger than that of ordinary glass, tempered glass has the possibility of self-detonation (self-cracking) when the temperature difference changes greatly, while general glass does not have the possibility of self-detonation.
The third is that the appearance of tempered glass will be uneven, and the thickness will be thinner. Therefore, tempered glass cannot be mirrored.
Tempered glass characteristics
Tempered glass is the heating of high-quality float glass near the softening point, rapid cooling on the surface of the glass, so that the compressive stress is spread on the surface of the glass, and the tensile stress is on the central layer. The induced tensile stress is offset by the strong compressive stress of the glass, and then the safety of the glass is added.
1. Strength improvement: The mechanical strength, impact resistance and bending strength of tempered glass can reach 4 — 5 times that of ordinary glass.
2. Improvement of thermal stability: Tempered glass can withstand huge temperature difference without damage, and resistance to variable temperature difference is only 3 times that of common float glass with the same thickness.
3. Safety progress: After the toughened glass is damaged by strong force, tiny obtuse angle particles appear quickly, and then the maximum safety is guaranteed.
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