The Three Major Differences Between Online and Offline Low-e Glass

1.Low-e glass production process

Online Low-E glass means that in the production process of float glass, a chemical solution containing tin salt as a main component is sprayed on the surface of the hot glass to form a single film of a tin oxide (SnO2 ) compound having a certain low radiation function.Off-line Low-E glass is made by uniformly depositing metallic silver (Ag) and other metals and metal compounds with extremely low on the glass surface in a special production line by vacuum magnetron sputtering. It consists of at least four layers of film.

2.Low-e glass variety and appearance

The online Low-E glass has a single variety and is limited by the scale production of float glass. Currently, it is only 6mm thick and is a colorless and transparent variety.Off-line Low-E glass is available in a variety of high, medium and low transmittance products according to different climatic characteristics, and the color is silver gray, light gray, light blue and colorless transparent, etc. And many other colors. The thickness can be made from 3 to 12 mm.

3.Low-e glass performance parameters

The spectrum of the online Low-E glas exhibits the characteristics of a tin oxide conductive film, while the spectrum of the offline Low-E glass exhibits the characteristics of a composite film of silver and tin oxide, both of which have good transmission to visible light.For the near-infrared light, the online Low-E glass has much higher reflection than the offline Low-E glass, and the far-infrared radiation has less absorption and higher reflection than the offline Low-E glass.Therefore, off-line Low-E glass has a low shading coefficient and a low heat transfer coefficient compared to the online Low-E glass.