Why is Tempered Glass Fragile in Winter

With the arrival of winter, the damage rate of tempered glass (especially outdoor) is 0.2% higher than in previous seasons. Tempered glass is a type of prestressed glass. It has compressive stress on its surface and tensile stress inside. Normally, glass is in a state of force equilibrium. But there are a small amount of impurities in the glass raw materials. With the extension of time and the large temperature difference between day and night in winter, phase transition will occur and the volume will increase. Especially when the indoor temperature is high and the outdoor temperature is low, the temperature inside and outside the glass on the window is different, which can disrupt the balance of compressive and tensile stresses in tempered glass and cause it to break on its own. It is called self explosion in the industry.

Response methods

1. Increase sealing performance

When installing tempered glass, it is important to choose good sealing materials and appropriate installation methods to ensure that the sealing performance of the glass meets the standard requirements and avoid excessive temperature differences between indoor and outdoor environments.

2. Use special tempered glass

At present, there are some special tempered glass on the market, such as bulletproof glass and slow rupture glass, which can effectively improve the impact resistance and rupture characteristics of tempered glass, and are suitable for use in places that require high safety requirements.

3. Regular inspection and maintenance

During the use of tempered glass, regular inspection and maintenance are required. If cracks or damages are found, they should be replaced or repaired immediately.

4. Control indoor temperature

When using tempered glass in winter, it is necessary to control the indoor temperature to avoid sudden temperature changes. Suitable heating equipment can be used to maintain stable indoor temperature and reduce the risk of glass cracking.

In the Northeast region, in order to avoid the breakage of tempered glass or glass, two layers of doors and windows are used to separate them.

Tempered glass is actually a type of prestressed glass. To improve the strength of glass, chemical or physical methods are usually used to create compressive stress on the surface of the glass. When the glass is subjected to external forces, the surface stress is first counteracted, thereby increasing the load-bearing capacity and improving the tensile strength of the glass The main advantages of tempered glass are twofold. Firstly, its strength is several times higher than that of ordinary glass. Its bending strength is 3-5 times that of ordinary glass, and its impact strength is 5-10 times that of ordinary glass. While improving its strength, it also enhances its safety. Safe use is the second main advantage of tempered glass, as its increased load-bearing capacity improves its fragility. Even if the tempered glass is damaged, it remains in small pieces without sharp angles, greatly reducing the harm to the human body. The resistance to rapid cooling and heating of tempered glass is 2-3 times higher than that of ordinary glass, and it can generally withstand temperature differences of more than 150LC, which has a significant effect on preventing thermal cracking.

In short, the cracking of tempered glass in winter is a common problem that requires attention to installation and maintenance. At the same time, suitable tempered glass should be selected to improve safety performance and avoid potential safety hazards.