What Is The Difference Between Semi-tempered Glass And Tempered Glass?

Nov. 21, 2018

Building Tempered Glass is actually a type of prestressed glass. In order to increase 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 is subjected to external force, the surface stress is first offset, thereby improving the bearing capacity and improving the glass resistance. Pull strength. The main advantages of tempered glass are two. The first is that the strength is several times higher than that of ordinary glass, the bending strength is 3 to 5 times that of ordinary glass, and the impact strength is 5 to 10 times that of ordinary glass, which improves the strength. Security. Safety of use is the second major advantage of physical tempered glass. Its increased load carrying capacity improves the fragile nature. Even if the tempered glass breaks down, it will show small fragments without sharp corners, and the damage to the human body is greatly reduced. The quenching and heat resistance of tempered glass is 2 to 3 times higher than that of ordinary glass. Generally, it can withstand temperature changes of more than 150C, which has obvious effects on preventing thermal cracking.

Semi-tempered glass is also called Heat Strengthened Glass. It is a kind of between ordinary flat glass and tempered glass. It has the characteristics of high strength of tempered glass. At the same time, it avoids the flatness of tempered glass and is easy to self-explosion. Disadvantages such as overall crushing. When the semi-tempered glass breaks, it is radially radial cracked along the crack source, and generally there is no tangential crack propagation, so the whole can not remain collapsed after the damage. Semi-tempered glass is suitable for curtain wall and exterior window in buildings. It can be made into semi-tempered coated glass with image distortion better than tempered glass. However, it should be noted that semi-tempered glass is not included in the safety glass range. As it is broken, there are still sharp fragments that may injure people and cannot be used in skylights and occasions where human impact may occur. The surface compressive stress of semi-tempered glass is between 24MPa and 69Mpa, and the surface pressure of tempered glass should be greater than 69MPa. The production process of semi-tempered glass is the same as that of tempered glass. The wind pressure is only different in the quenching station, and the resistance to quenching and heat is less than that of tempered glass.

Heat Strengthened Glass