How to choose safety glass for high-rise building glass curtain wall

Safe is the most important thing for high-rise building glass. And for this point, vacuum glass is the most safety glass for buildings and curtain walls in virtue of its high performance of wind resistance, sun block, thermal insualtion, fire resistance and anti-noise function.

[China Glass Net] For the safety glass of high-rise building glass curtain wall, the main concern of its safety is that the glass breaks and falls and hurts people. This should include a three-part analysis: first, the glass has sufficient strength to ensure that it does not break when it is in working condition - strong and not broken, and secondly, the glass has anti-crushing and scattering properties, so that it is not guaranteed when it is in a broken state. It will fall and scatter - not scattered; the third is that the glass has a shape that is not easy to hurt, avoiding large pieces of sharp, but obtuse angle, smooth and small particles - but if it is scattered from high altitude, it will fall regardless of shape. The above three elements should be the key points to grasp and control the safety glass of the high-rise building glass curtain wall.

Tempered glass has two safety factors: high strength and its damage form is obtuse angle small particles, but it does not have the anti-breaking and scattering property. This is a key safety factor for high-rise building glass curtain wall, and thus the unsafe consequences Yes, the large group of tempered glass broken into obtuse-angled pieces, scattered from high altitude, also hurts people. The culprit is the gravity and speed of free fall. As we all know, the warhead is a small, smooth particle, but once it is shot from the barrel, it has a considerable speed and becomes a deadly killing weapon. And a sharp sword axe, when it is still, is impossible to cause damage. Therefore, it is more important for the glass of the high-rise building glass curtain wall to be safe and not to be destroyed and the debris not to be scattered. No matter what form of glass fragments, such as scattered on high-rise buildings, it is dangerous or even fatal.

In addition, one characteristic of tempered glass is that since the preheating stress cannot be completely eliminated, there is a self-explosion rate of 5 to 8 thousand, and the damage is without warning. In this way, glass self-explosion and high-altitude scattering will become the basic technical basis for the use of (all) tempered glass for high-rise building glass curtain walls. Therefore, the use of (full) tempered glass at a certain height is considered safe, and it should be considered unsafe to use it above a certain height. Security is a relative concept that is conditional; no, unconditional. The traditional concept of safety glass, out of the conditions of use, is only defined by its fragment form and may not be comprehensive. Therefore, the use of (full) tempered glass on the glass wall of high-rise buildings in Japan must also be added with a layer of anti-scattering film to ensure safety. In addition, if the semi-tempered glass is broken, although its fragmentation is large, it is usually limited to 4-6 pieces, and it is still possible to remain in the frame. However, if it is not scattered, the possibility of injury will be smaller. According to this, the width of the bonded glass structural adhesive is ensured, so that the glass is cracked without being scattered.

The technical measures to ensure the safety of semi-tempered glass is higher than that of tempered glass. Otherwise, such a large and sharp magnetic form, once falling from high altitude, is extremely dangerous.

In recent years, a new type of safety glass, which is a combination of "titanium full foil film" and ordinary float glass, has its technical characteristics worthy of attention. Because it is a new material and application advantage for the aforementioned shortcomings of tempered glass. First of all, "titanium foil film composite safety glass" has the characteristics of high strength, and its reinforcing effect can reach the same level of tempered glass. Secondly, high impact resistance, explosion-proof, and excellent non-scattering properties are excellent. and. The two characteristics of "strong but not self-violent, broken and not scattered" are insufficient for tempered glass, which is the important advantage of using safety glass for high-rise building glass curtain wall. In addition, it also has good visible light transmission, while its infrared reflectivity can reach 22%, UV blocking rate can reach 99%, achieving energy-saving effect similar to low-emissivity glass (L0w-E) and special UV protection function. . In this way, in addition to safety, the curtain wall has the dual benefits of energy saving and environmental protection.