The same thing between semi-tempered glass and tempered glass is that both are tempered glass, the strength of the former is increased by about 2 times, and the strength of the latter is 3 to 5 times.
The difference:
1. Tempered glass is safety glass, which is granular after being broken and will not cause serious injury to people.
The relevant state departments have stipulated that certain parts of buildings must use this type of product; the latter is non-safety glass, which still has Large pieces of glass and sharp broken edges can seriously injure people, but there is no risk of self-explosion, and are often used in glass curtain
2. Tempered glass needs to pass the national compulsory (3C) certification, with strict physical and chemical performance testing requirements, and a national designated agency to supervise product performance and production process.
Semi-tempered glass also has performance requirements, but it is not mandatory.
3. Both of them need to be heat treated in a tempering furnace, but the processing requirements for semi-tempered tempering are lower than those for tempering.
Characteristics of semi-tempered glass: The production process of semi-tempered glass is similar to that of tempered glass, except that the wind pressure in the quenching process is lower than the process requirements of tempered glass.
The surface stress in semi-tempered glass is between 24~69Mpa, which is lower than that of tempered glass. Therefore, the strength and thermal shock resistance of semi-tempered glass are slightly lower than that of tempered glass, but it is 1~2 times higher than that of ordinary glass.
Compared with tempered glass, the biggest advantage of semi-tempered glass is the flatness of the glass. , less optical distortion, and, due to the low stress, will not produce self-explosion phenomenon.
After the semi-tempered glass is broken, the fragments are similar to ordinary glass, showing through cracks, and will not form small fragments in a closed state in the center of the glass, and will not fall from the building.
This, for architectural glass, is very important. very important. It can avoid the danger of broken glass falling from the air to the ground and hurting people. Semi-tempered glass can withstand heat up to 650°C, and has good thermal shock resistance.