Low-E glass, also known as low radiation glass, is a film product composed of multiple layers of metal or other compounds on the glass surface. The coating layer has the characteristics of high transmission to visible light and high reflection to mid and far infrared rays, which makes it have excellent heat insulation effect and good light transmission compared with ordinary glass and traditional coated glass for buildings.
Low emissivity coated glass is also called Low-E glass. Low-E glass is to coat low emissivity silver and metal oxide layers on glass surface. The coatings on glass will show different colors. Its major properties is to lower the U-value and selectively lower the SC which on the whole improves the glass energy efficiency. It features high infrared reflection. It can directly reflect far infrared. Because of its low surface emissivity(E), it absorbs and re-radiates very little energy. It has a wide range of shading coefficient(SC) which can meet different solar control requirements according to different climates. I t can be divided into high transmission low-E glass and solar control low-E glass.
Low-E insulating glass has a transmittance of more than 60% for solar radiation of 0.3-2.5um. During the day, most of the radiation energy from the outdoor can be transmitted. However, at night and in rainy days, more than 50% of the thermal radiation from indoor objects is reflected back to the room. Only less than 15% of the thermal radiation is absorbed by it and dissipated through re radiation and convection exchange. Therefore, it can effectively prevent the indoor heat from leaking to the outside. This characteristic of Low-E glass enables it to control the unidirectional flow of heat energy to the outside.
1、 Float insulating glass 2、 Tempered insulating glass 3、 Coated insulating glass 4、 Low-E insulating glass Common hollow glass: 5 + 9A + 5 double-layer hollow. Shenghai door and window explained that 5 refers to the glass thickness of 5mm, 9 refers to the hollow part of 9mm, and the letter A is the abbreviation of air. There are also models in the market, such as 5 + 15A + 5, 5 + 22a + 5, 5 + 27a + 5, 5 + 32A + 5, etc. it is not difficult to understand the meaning of the above.
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