Why do we still need to apply an explosion-proof film to tempered glass?
Tempered glass is actually a kind of prestressed glass. In order to improve the strength of glass, chemical or physical methods are usually used to form compressive stress on the glass surface. When the glass is subjected to external forces, it first cancels the surface layer stress, thereby improving the bearing capacity and enhancing the glass's own Wind pressure, cold and heat, impact. Even with excellent compression resistance, tempered glass still has a spontaneous explosion rate of about three-thousandths, which is still unchangeable by current technology. In addition, due to the different levels of domestic glass production, the quality of the tempered glass produced will also vary. Many factors such as the shape of the tempered glass, the supporting stress conditions, the use environment, and the presence or absence of external impacts may cause the glass to be damaged and may cause accidental injury.
The causes of tempering self-explosion caused by the tempered glass in daily life are as follows:
Stones, impurities, and bubbles in the glass: Impurities in the glass are the weak point of the tempered glass and the stress concentration. Especially if the stones are in the tensile stress zone of the tempered glass, it is an important factor that causes the cracking.
2. Scratches, blowouts, deep blasts and other defects on the glass surface due to improper processing or operation may easily cause stress concentration or cause the tempered glass to explode.
3. When the glass is heated or cooled, the temperature gradient along the glass thickness direction is uneven and asymmetric. Toughened products tend to self-explode, and some produce "wind bursts" when chilled. If the tensile stress area is shifted to one side of the product or to the surface, the tempered glass forms a self-explosion.
The self-explosion of tempered glass cannot be stopped, so you can use a good quality explosion-proof film to prevent injury to the human body when the glass self-explodes. The application of explosion-proof film can greatly reduce the situation of glass fragments splashing and reduce the possibility of injury.
From a technical point of view, tempered glass is a special glass made of ordinary glass through a variety of processes. It is difficult to be damaged without external forces. However, when subject to external temperature changes, physical expansion and contraction are prone to self-explosion. In the process of tempering glass, some manufacturers' technology and equipment are backward, and the produced tempered glass has hidden safety hazards and is prone to self-explosion. Therefore, a layer of safety explosion-proof film is put on the tempered glass, which can prevent the damage caused by the spontaneous explosion of the glass, and also bring a "visible sense of security" for yourself and your family.
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