Problems needing attention in the production and use of hot bending insulating glass

Insulating glass has good heat insulation and sound insulation effect, which can reduce the energy consumption of buildings, save energy, reduce noise and improve the environment. In addition, the use of insulating glass can also simplify the structure, reduce weight, increase lighting, reduce cost, therefore, insulating glass is widely used in building curtain walls and doors and windows. Developed countries (such as Northern Europe) have laws that require the use of insulating glass in buildings, and the use of insulating glass in China is becoming more and more extensive. Hot bending (bending tempered) insulating glass, in the production and use, must pay attention to the following problems:

First, the hot bending of glass

Hot bending is required to have good appearance quality, for this reason, to select high-quality float glass original sheets, and the use of suitable hot bending mold and scientific and reasonable hot bending process, hot bending glass products require smooth surface, no obvious spots, pockmarks, in line with product size tolerance requirements, in addition, considering the consistency of the lamination, the two pieces of glass that synthesize insulating glass must be bent in pairs to ensure a good fit.

Second, the shortcomings of hot bending (bending tempering) insulating glass

High-grade hot bending (bending tempered) insulating glass requirements in addition to the characteristics of ordinary insulating glass, but also require low light distortion, in order to better observe the objects in the field of view through the glass, and this characteristic indicator whether it is GB11944-89 insulating glass national standard, or JB/ZXXXX-XX hot bending glass line standard, are not stipulated, on the one hand, because this new product has not been around for a long time, people in architecture have relatively low expectations for this, on the other hand, it is also more common with this problem, Indicators are more difficult to determine.

As we all know, automotive curved laminated glass has high requirements for light distortion, because the visual duo image is easy to fatigue, which leads to traffic hazards. Compared with hot bending laminated glass, hot bending insulating glass will lead to greater optical distortion and distortion rate than a pair of glass with the same hot bending mass, so hot bending insulating glass is not used on traffic vehicles, and the optical distortion index of the same automotive safety glass is also suitable for hot bending insulating glass.

Third, the use of hot bending (bending tempered) insulating glass in high-end buildings should pay attention to light distortion

According to the above, hot bending (bending tempered) insulating glass inevitably has a large optical distortion, easy to produce a double image in use, and there is no requirement for this indicator in the industry standard, therefore, it is not suitable for use in traffic vehicles and precision observation stations, used in high-end buildings, the requirements for light distortion also need to be specifically discussed, and strict places are required not to use this product solution.

The use of large hot bending (bending tempered) insulating glass curtain wall although beautiful, generous, but must pay attention to its light distortion performance, with the development of China's glass curtain wall industrial technology, this problem will be well solved, the corresponding standards will be introduced as soon as possible.