[China Glass Network] Today, this article will introduce you to the production method of Low-E glass. Let's take a look at the interested partners!
The current two Low-E glass production methods.
Online high temperature pyrolysis deposition method:
Online high temperature pyrolysis deposition "Low-E" glass has products from several companies in the United States. Such as PPG's Surgate200, Ford's Sunglas H. R"P". These products are completed during the float glass cooling process. The liquid metal or metal powder is sprayed directly onto the surface of the hot glass, and as the glass cools, the metal film becomes part of the glass. Therefore, the film layer is hard and durable. The "Low-E" glass produced by this method has many advantages: it can be bent and tempered, does not have to be used in a hollow state, and can be stored for a long period of time. Its disadvantage is that the thermal performance is relatively poor. Unless the film is very thick, its "u" value is only half that of the "Low-E" coated glass by sputtering. If you want to improve the thermal properties by increasing the film thickness, the transparency is very poor.
Offline vacuum sputtering method:
The offline production of Low-E glass is currently widely used in the world by vacuum magnetron sputtering coating technology. Unlike the high temperature pyrolysis deposition method, the sputtering method is off-line. And according to the difference of the glass transmission position, there are horizontal and vertical points.
The "Low-E" glass is produced by a sputtering process, and a layer of pure silver film is required as a functional film. The pure silver film is between the two metal oxide films. The metal oxide film provides protection to the pure silver film and increases the color purity and light transmittance as an intermediate layer between the film layers.
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