Tempered glass [g ā Ng hu à b ō Li]




Tempered glass/Reinforced glass is a glass with compressive stress on its surface. Also known as Tempered glass. The use of toughening to strengthen glass began in France in 1874.



Tempered glass/Reinforced glass belongs to safety glass. Tempered glass is actually a type of pre-stressed glass. To improve the strength of glass, chemical or physical methods are usually used to form compressive stress on the surface of the glass. When the glass is subjected to external forces, it first offsets the surface stress, thereby improving its load-bearing capacity, enhancing its own resistance to wind pressure, heat and cold, and impact. Pay attention to distinguishing it from fiberglass，  Glass product  .
characteristic

Security

When glass is damaged by external forces, the fragments will form small obtuse angle particles resembling honeycomb shapes, which are less likely to cause serious harm to the human body.

high strength

The impact strength of tempered glass with the same thickness is 3-5 times that of ordinary glass, and the Flexural strength is 3-5 times that of ordinary glass.

thermal stability

Tempered glass has good thermal stability, can withstand a temperature difference of three times that of ordinary glass, and can withstand a temperature change of 300 ℃.

advantage

The first is that the strength is several times higher than that of ordinary glass, and it is resistant to bending.

The second is safety in use, as its load-bearing capacity increases and improves its fragility. Even if tempered glass is damaged, it appears as small shards without sharp angles, greatly reducing the harm to the human body. The resistance to rapid cooling and heating of tempered glass is 3-5 times higher than that of ordinary glass, and it can generally withstand temperature changes of over 250 degrees Celsius, which has a significant effect on preventing thermal cracking. It is a type of safety glass. To ensure the safety of qualified materials for high-rise buildings.

shortcoming

Disadvantages of tempered glass:

1. Tempered glass cannot be cut or processed again. It can only be processed to the desired shape before tempering, and then tempered.

Although tempered glass has stronger strength than ordinary glass, it has the possibility of self explosion (self rupture), while ordinary glass does not have the possibility of self explosion.

3. The surface of tempered glass may have unevenness (wind spots) and slight thinning of thickness. The reason for thinning is because after the glass is softened by hot melting, it is rapidly cooled by strong wind, causing the crystal gap inside the glass to decrease and the pressure to increase. Therefore, the glass is thinner after tempering than before. In general, 4-6mm glass thins by 0.2-0.8mm after tempering, while 8-20mm glass thins by 0.9-1.8mm after tempering. The specific degree depends on the equipment, which is also the reason why tempered glass cannot be used as a mirror.

4. Flat glass used in construction after physical tempering in a tempering furnace generally undergoes deformation, and the degree of deformation is determined by the equipment and technical personnel's process. To some extent, it affects the decorative effect (except for special needs).