windows and curtain walls
The importance of building energy efficiency

Energy is an important material basis for human survival and production. In recent years, China's economic construction has achieved world-famous achievements. At the same time, huge energy consumption has become the focus of attention of the world. The shortage of energy supply and the ecological and environmental problems brought about by energy consumption will seriously hinder the development of the economy and affect our living environment.


The National Bureau of Statistics recently released data that China’s total energy consumption in 2011 rose to 3.48 billion tons of standard coal. Among them, building energy consumption accounts for more than 28% of the country's total energy consumption. The energy consumption of buildings has risen sharply along with the continuous increase of the total amount of buildings and the improvement of living comfort. According to the current development forecast of building energy level, by 2020, China's building energy consumption will account for about 35% of the total energy consumption of the whole society, surpassing industrial energy use and becoming the first field of energy use.

Promoting building energy conservation is mainly to improve the insulation performance of building envelopes. Among the several main components of the building envelope, the thermal insulation of the curtain wall and the doors and windows is poor, which is the main factor affecting the indoor thermal environment and building energy conservation. Therefore, increasing the thermal insulation performance of the door and window curtain wall and reducing energy consumption are important links to improve the indoor thermal environment quality and improve the building energy efficiency level.

The infrared spectrum of ordinary doors and windows shows that a large amount of heat is radiated to the outside through the glass. The infrared spectrum of the energy-saving windows and doors shows that the heat radiated through the door and window glass is much less. The colors in the figure are green and blue respectively, which achieves the effect of heat preservation. The energy-saving effect of energy-saving doors and windows is achieved through the integrity of the entire door and window system, and the sealant material is an indispensable part of the whole system.

Application of Silicone Sealant in Building Energy-saving Door and Window Curtain Wall

The application of silicone sealant in building door and window curtain wall mainly includes three aspects: insulating glass two-way sealing, curtain wall structure, weatherproof sealing and waterproof and weatherproof sealing of doors and windows. The quality of silicone sealant not only affects the safety of the entire building door and window curtain wall structure, but also relates to whether the building meets the requirements of energy saving and environmental protection.

The insulating glass hollow glass unit has outstanding thermal insulation performance and is an important material for improving the energy-saving level of doors and windows. It has been widely used in construction in recent years. The dry gas inside the insulating glass makes the insulating glass have the functions of sound insulation, heat insulation, anti-condensation, reducing cold radiation and enhancing glass safety.

In the two seals of the hollow glass structure, the first seal is to ensure low water vapor penetration, and hot melt butyl rubber is generally used. The role of the second sealant is to ensure the integrity of the glass unit structure, generally selected silicone sealant. If it is an insulating glass for structural assembly, a silicone structural sealant must be used.

The service life of an IG unit is critically dependent on the functional retention of the seal structure, while an excellent edge seal must have the following characteristics:

1. Lasting resistance to environmental factors, especially heat, water or moisture and ultraviolet light;

2. Sufficient structural strength to withstand displacement, so that the first channel sealant water vapor channel changes minimally;

3. Low moisture and gas permeability under the conditions of use.

If the silicone sealant does not meet the above requirements, then the sealed insulating glass is likely to fail during the use period, resulting in failure and loss of energy saving effect.