Insulating glass is a modern glass technology that enhances the performance of doors and windows through innovative processes. Its main feature is to evenly separate two or three pieces of glass with aluminum spacers to form a sealed dry gas layer (usually air or inert gas). The following are its core advantages:
High Energy Efficiency
The dry gas layer in the middle (with a thickness of 6-20mm) blocks heat conduction. When combined with a Low-E coating, it can reduce heat loss in winter and block ultraviolet rays in summer. Compared with ordinary single-pane glass, it can save about 40% of energy.
The aluminum spacers are filled with desiccants, which continuously absorb residual moisture to ensure that the cavity remains dry and free of condensation.
Sound Insulation and Noise Reduction
The structure of multiple layers of glass plus the gas layer forms a "damping effect", which can block noise ranging from 27 to 40 decibels. This is equivalent to reducing the noise of traffic in a busy city to the level of normal conversation.
Combining glasses of different thicknesses (such as 5mm + 12A + 5mm) can optimize the sound insulation frequency band for specific needs.
Lightweight and Safety
The total weight of three pieces of insulating glass is only 60% of that of solid glass of the same area, reducing the load-bearing of the building.
Laminated glass or tempered glass can be selected, which increases the impact resistance by 3 to 5 times. When broken, the fragments will not splash.
Application Scenarios
Residential Doors and Windows: Reduces air conditioning energy consumption and minimizes external noise interference.
Commercial Buildings: The curtain wall design takes into account both lighting and energy efficiency, meeting the standards of green buildings.
Special Requirements: Places with high sound insulation requirements such as airports and hospitals, or adaptation to extreme climates in cold or tropical regions.
Comparison with Traditional Single-Pane Glass
The heat transfer coefficient of single-pane glass is approximately 5.8W/(m²・K), while that of insulating glass can be reduced to 1.8-2.8W/(m²・K).
The service life of ordinary insulating glass is about 15-20 years, and high-quality products can last for more than 30 years.
Currently, the mainstream process adopts a double-seal method: the inner layer of butyl rubber is used for moisture prevention, and the outer layer of polysulfide rubber or silicone rubber enhances the structural strength. The market price is approximately 200-500 yuan per square meter, which specifically depends on the type of glass, gas filling, and processing technology.
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