Why does tempered glass of windows and doors self explode? How to choose the glass of windows and doors?

Part 1: Why does tempered glass of windows and doors self explode?

Glass self explosion refers to the sudden rupture or bursting of glass without external force. There are mainly two reasons as follows: :

※Thermal stress caused by extreme weather

The thermal stress caused by temperature changes, is known as thermal burst. When air conditioners are turned on indoors and sunlight is exposed outdoors in summer, the temperature on the glass surface suddenly increases or decreases. The thermal stress gap between inside and outside can cause cracks and breakage. Meanwhile, extreme weather such as typhoons and rain may also cause glass to burst.

※Instability of glass raw materials

The original glass sheet itself contains impurities - nickel sulfide. During glass manufacturing, if bubbles and impurities are not completely eliminated, they may rapidly expand and cause rupture under changes in temperature or pressure. Therefore, the self explosion of glass cannot be completely avoided, which is also an inherent characteristic of glass.

To address this issue, We Hihaus use raw materials from two top brands in the glass industry and heat the glass to a high temperature of 290 ° C for homogeneous hot dip treatment, achieving quality improvement. After treatment, the number of broken particles of 10CM² is controlled between 80-100 particles, and it will become granular after crushing to reduce secondary damage. Meanwhile, the self explosion rate has decreased from 3 ‰ of ordinary tempered glass to 1 ‰.

Part 2: How to choose the glass of windows and doors?

When selecting glass, it is recommended to use 3C certified tempered glass with good bending strength and impact resistance. On this basis, you can further choose the glazing configuration according to the living environment, urban area, floor level and other factors.

※Urban area

If the area is in the south and the population is relatively dense, it will be necessary for you to pay attention to the sound insulation and watertight performance of windows and doors.

If it is in the north, you will pay more attention to airtight and insulation performance.

※ Environmental noise

If you live on the side of the road or other noisy areas, it will be recommended that the windows and doors can be configured with hollow + laminated glass, which can greatly improve the sound insulation effect.

※ Floor height

When selecting glass for high floors, it is necessary to focus on wind pressure resistance. The higher the floor, the greater the wind pressure and the thicker the glass needed.

Because the requirements of the low floor against wind pressure are lower, the glass can be selected to be thinner. People who live on high floors have relatively high requirements for watertight performance and sound insulation. These can allow the staff to carry out targeted calculations when selecting windows and doors.

Part 3: How to deal with self explosion of windows and doors?

※Use laminated glass

Laminated glass is composed of two or more pieces of glass, sandwiched between a layer or more layers of organic polymer intermediate film. After special high temperature prepressing treatment, the glass and the intermediate film are bonded as one composite glass product.

Even if the glass breaks, the debris will be stuck to the film and the broken glass surface will remain intact, which effectively prevents the occurrence of splinter injuries and falling events.

※ Apply high-performance polyester film to glass

If the laminated glass is not used in the early stage, we can paste high-performance polyester film on the glass of windows and door. When the tempered glass breaks for various reasons, the safety explosion-proof film can stick to the glass fragments to prevent splashing and protect the personnel inside and outside the building from being hurt by the splashing glass fragments.

※Select ultra cleared tempered glass

There are two main advantages of ultra cleared tempered glass: the strength higher than that of ordinary glass and the low self explosion rate.

The thermal stability of ultra cleared tempered glass is more than good, and its external damage carrying capacity is higher. In the glass production process, the ultra-white process requires a lower impurity content than conventional glass, so the self explosion rate approaches zero.

Doors and Windows are the first line of home security protection. In order to prevent glass self-explosion, when we choose and evaluate the safety index of a door and window, we should be from the selection of materials, the performance of windows and door, technical process support and details of the comprehensive assessment.