Coated glass is also called reflective glass. Coated glass is coated with one or more layers of metal, alloy or metal compound films on the glass surface to change the optical properties of the glass and meet certain specific requirements. Coated glass can be divided into the following categories according to different characteristics of products: heat reflective glass, Low-E glass, conductive film glass, etc.
classification
Heat reflective glass is generally coated with one or more layers of thin films composed of metals or their compounds such as chromium, titanium or stainless steel on the glass surface, so that the products are rich in color, with appropriate transmittance for visible light, high reflectivity for infrared and high absorption rate for ultraviolet. Therefore, it is also called sunlight control glass, which is mainly used in buildings and glass curtain walls; Low radiation glass is a thin film system composed of multi-layer metals such as silver, copper or tin or their compounds coated on the glass surface. The products have high transmittance to visible light, high reflectivity to infrared and good heat insulation performance. It is mainly used in buildings, automobiles, ships and other communication tools. Due to the poor strength of the film, it is generally made into hollow glass; Conductive film glass is coated with conductive films such as indium tin oxide on the surface of glass. It can be used for glass heating, defrosting, defogging and liquid crystal display.
There are many ways of producing glass coated glass, such as vacuum magnetron sputtering, vacuum evaporation, chemical vapor deposition and sol gel method. Magnetron sputtering coated glass can design and manufacture multi-layer complex film system by using magnetron sputtering technology. It can be plated with a variety of colors on white glass substrate. The film has good corrosion resistance and wear resistance. It is one of the products produced and used most. There is a certain gap in the variety and quality of vacuum evaporation coated glass compared with magnetron sputtering coated glass, which has been gradually replaced by vacuum sputtering. Chemical vapor deposition is to inject reaction gas into the float glass production line, decompose on the hot glass surface, and deposit evenly on the glass surface to form coated glass. This method is characterized by less equipment investment, easy regulation, low product cost, good chemical stability and hot processing. It is one of the most promising production methods. The sol gel process is simple and stable, and the disadvantage is that the optical transmittance of the product is too high and the decoration is poor.
Energy saving sunlight control glass
On line sunlight control coated glass is a kind of coated glass with good control effect on sunlight. The product has stable physical and chemical properties and can be widely used in all kinds of buildings, daylighting windows, etc.
High permeability Lowe glass
High transmittance Lowe glass has high visible light transmittance, high solar transmittance and far-infrared emissivity, so it has excellent daylighting, more solar heat radiation through the glass and excellent heat insulation performance. It is suitable for high permeability buildings in cold areas and some areas in the north, highlighting the natural daylighting effect.
Sunshade type Lowe glass
The sunshade type Lowe glass has a certain shade effect on the indoor line of sight, which can prevent the solar heat radiation from entering the room and limit the secondary heat radiation from outside in summer. It is applicable to both the South and the north. It is suitable for all kinds of buildings because of its rich decorative effect and outdoor line of sight shading.
Double silver Lowe glass
Double silver Lowe glass highlights the shading effect of glass on solar thermal radiation. It skillfully combines the high transmittance of glass with the low transmittance of solar thermal radiation. It has high visible light transmittance, which can effectively limit the outdoor background thermal radiation from entering the room in summer.
application
The most are heat reflective glass and low radiation glass. Basically, vacuum magnetron sputtering and chemical vapor deposition are used. Internationally famous manufacturers of vacuum magnetron sputtering equipment include BOC company of the United States and LeiBao company of Germany, and famous manufacturers of chemical vapor deposition include Pilkington company of the United Kingdom. Since the late 1980s, hundreds of coated glass manufacturers have appeared in China. The vacuum magnetron sputtering manufacturers with great influence in the industry include China Southern Glass Group Corporation and Shanghai Sunshine coated glass company, and the chemical vapor deposition manufacturers include Shandong Bluestar glass company and Changjiang float glass company.
Positive factors
The upgrading of residents’ consumption structure, encouraging independent innovation of enterprises, new rural construction and urbanization process will ensure that the medium and long-term demand growth trend of glass products in the domestic market will remain unchanged. With the development of construction, automobile, decoration, furniture, information technology and other industries and the improvement of people’s requirements for living space environment, functional processing products such as safety glass and energy-saving insulating glass have been widely used. The supply and demand pattern and consumption structure of flat glass are changing.
The development of the glass industry is related to many industries of the national economy. The glass industry plays a positive role in promoting the development of the whole national economy. Therefore, the eleventh five year plan also puts forward specific requirements for the development of glass industry. Various laws and regulations have also been promulgated to regulate the healthy development of the glass industry. Under the new situation, the glass industry must change the growth mode and effectively adjust the industrial structure according to the requirements of the scientific outlook on development, so as to promote the healthy development of the industry.
Hanzhong Borisun Optics manufacturer
Specializing in the processing and production of optical components, The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.
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