Low-emissivity coated glass capable of enabling film surface to be tempered downwards

Abstract

The invention discloses a low-emissivity coated glass capable of enabling a film surface to be tempered downwards, and belongs to the field of environmentally-friendly and energy-saving building materials. The film structure of the low-emissivity coated glass is sequentially as follows: a glass substrate, a first-layer priming coating silicon nitride layer, a second-layer protective layer nickel chromium layer, a third-layer dielectric layer zinc tin oxide layer, a fourth-layer seed layer zinc oxide layer, a fifth-layer functional layer silver layer, a sixth-layer protective layer nickel chromium layer, a seventh-layer dielectric layer silicon nitride layer, and an eighth-layer graphite protective layer. After the glass provided by the invention is tempered, the outdoor reflectance is lessthan 6%, and the single-sheet transmittance reaches 80% or more. After a hollow product is synthesized, the shading coefficient of the product is higher than 0.65, the visible light to solar gain coefficient (LSG) is greater than 1.4, and the emissivity is lower than 0.10, and the produce belongs to high-transmission low-emissivity products and very suitable for use in northern cold regions. At the same time, because the reflection is lower than that of ordinary white glass, the transmittance is higher, and the product has thermal isolation effects, so that the product can be widely used in places such as museums and showcases.

Description

technical field [0001] The invention relates to the field of environment-friendly and energy-saving building materials, in particular to a low-radiation energy-saving glass that can be toughened with the film facing downward. Background technique [0002] Low-emissivity coated glass ("Low-E" glass) is a kind of coated glass with a high reflectance to infrared rays with a wavelength of 4.5-25 μm. This kind of coated glass has high light transmittance to visible light, which ensures indoor lighting, and has high reflectivity to far-infrared light, so as to prevent the glass from absorbing outdoor heat and then generating thermal radiation, which transmits heat into the room and indoor objects. The heat generated is reflected back to achieve the purpose of reducing the heat radiation passing through the glass. This reduces energy consumption for heating and cooling the building. The performance of Low-E glass is mainly measured by visible light transmittance, shading coeffici...

AI Technical Summary

Problems solved by technology

The efficiency of this production method is low, mainly during the production, the film arrangement of the coating line will be carried out according to the specific product size, and the maximum loading rate of the coating cannot be reached.

At the same time, if this production mode produces defective products, the patches are not timely enough, which will have a certain impact on the delivery time of the products.

[0005] (2) The existing temperable high-transparency single-silver low-emission energy-saving glass has insufficient mechanical properties and strength, and it is necessary to protect the film surface during transportation

This method greatly increases the cost of the product, resulting in higher product prices, which is not conducive to the promotion and use of energy-saving and environmentally friendly building materials.

In addition, due to the insufficient mechanical properties of existing products, it is easy to cause damage to the film surface during cutting, edging and other processing processes, resulting in low processing efficiency and low yield of such products

[0006] (3) The film surface strength of the existing high-transparency temperable single-silver products is not enough, so the film surface is used for tempering when tempering

The heating time of this tempered product is longer, and the edge is easy to overheat

Tempered products are prone to poor image quality, and after the product is installed on the wall, the reflected image is prone to distortion

And because the heating time is relatively long, the production energy consumption per unit product is relatively high during production, and the production cost is relatively large

[0007] Chinese patent application CN102336529A discloses a high-permeability toughened low-emissivity glass and its manufacturing method. The film layer structure in the technical solution is glass / SiNx / ZnSnO / ZnO / Ag / NiCr / ZnSnO / SiNx, although the tempered single The visible light transmittance of the coated glass can reach 85%, but its reflectivity is also more than 8%, and it cannot be tempered with the film side down, and the light-to-heat ratio performance of this product is also poor

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