The Development Direction Of Insulating Glass

Insulating glass is two or more pieces of glass to effectively support evenly separated and surrounding bonding sealing so that the formation of dry gas between the glass layer. Insulating glass is a kind of good light transmission, heat insulation, heat insulation, sound insulation, band beautiful high-quality building materials, because of its excellent heat insulation, sound insulation, and frost prevention performance, it has become an indispensable part of building doors and windows curtain walls.

With the improvement of the saving index, insulating glass has almost become the standard product of door and window curtain wall glass because of its excellent energy-saving characteristics, and the insulating glass technology is gradually developing towards the direction of energy saving and sustainability.

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Insulating glass can be divided into flat and curved insulating glass according to shape; according to the hollow cavity gas classification, it can be divided into ordinary insulating glass and gas-filled insulating glass (filled with argon, krypton gas, and other gases). According to the type of insulating glass, spacer material can be divided into rigid and flexible spacer systems.

Material Science

The glass used for insulating glass can be flat glass, coated glass, laminated glass, fire-resistant glass, semi-tempered glass, embossed glass, etc. The glass of building doors, windows, and curtain walls should use safety glass according to relevant safety regulations.

present situation

Tempered glass is the most common type of safety glass, and tempered insulated glass is commonly used in building doors, windows, and curtain walls.

Low-E insulating glass is a thin film composed of multiple layers of metal or other compounds coated on the surface of the glass. Low-E insulated glass can reflect some infrared rays to the outside and some visible light to the inside, thus achieving good insulation function. At the same time, it can significantly reduce indoor heat radiation to the outside, playing a role in insulation.

Directions for development

1. High performance

Double-silver Low-E, triple-silver Low-E insulating glass does not change the original insulating glass structure based on increasing or changing the structure of the coated film layer, which can not only filter the sunlight into a cold light source in summer but also block the indoor heat radiation to the outside in winter. Double-silver Low-E and triple-silver Low-E insulating glass have better thermal insulation performance than ordinary insulating glass while taking into account the needs of lighting and shading, which can effectively reduce the energy consumption of the building while improving the comfort of the indoor space.

In addition, high thermal resistance edge seals and spacers significantly reduce heat transfer at the glass edges. Higher LSG (light-to-heat ratio coefficient), Low-E film systems with lower surface emissivity, and edge sealing and spacer materials with higher thermal resistance are some of the development directions for insulating glass.

2. Lightweight

With the significant increase in demand for large-sized panoramic glass and ultra-low energy glass, insulated glass has become very bulky while meeting existing safety regulations. The challenge of oversized and overweight glass doors, windows, curtain walls, profiles, and hardware is significant, especially for specialty products such as panoramic sliding doors and large opening fans. Therefore, using thinner glass and suspended membrane insulating glass within a reasonable range is one of the trends in the development of insulating glass.

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3. Full lifecycle design

With the improvement of green and energy-saving building standards, requirements have also been put forward for the carbon emissions throughout the entire life cycle of buildings, which requires insulated glass to have a longer expected service life and smaller performance degradation.

The expected service life of insulated glass is mainly determined by three parts: edge sealing materials (mainly sealant), spacer materials (mainly spacer strips), and desiccants. High-performance sealant and spacer strip form a barrier for water and gas, which keeps the gas inside the cavity dry under the action of desiccant. Therefore, sealants and spacers with better durability and sealing properties, as well as molecular sieves with stronger moisture absorption ability, are guaranteed.

Meanwhile, in terms of gas retention within the hollow cavity, flexible spacer strips have significant advantages in resisting deformation such as wind pressure, thermal expansion, and contraction. The silicone foam thermosetting flexible spacer strip and thermoplastic rubber strip integrated with efficient molecular sieves have good gas barrier properties, which can effectively maintain gases such as argon gas in the hollow cavity for a long time, thereby slowing down the thermal performance degradation of insulating glass.

4. Integration

More and more personalized demands require the development of integrated building doors, windows, curtain walls, and insulated glass. Laminated insulating glass can have higher safety; Vacuum composite hollow can significantly improve the insulation and sound insulation performance of insulating glass; The built-in hollow louver glass can effectively solve the needs of sun shading and privacy; Multi-layer laminated composite insulating glass can meet the needs of anti smashing and anti-theft; Curved shapes and various decorative glass composite insulating glass make building doors, windows, and curtain wall glass more flexible. Composite insulating glass such as dimming glass and electrochromic glass further enhances the level of building intelligence; Composite insulated glass can effectively reduce building carbon emissions and so on.

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The insulating glass market is constantly evolving and innovating, and in the face of multiple demands for energy conservation, environmental protection, safety enhancement, intelligence, application of environmentally friendly materials, and design aesthetics, the industry's direction of development is showing a diversified trend. With the progress of science and technology and changes in consumer demand, insulating glass will play a more important role in the future of the building and home, creating a more comfortable, safe, and beautiful living environment for us.