What is Coated Glass? How to distinguish coated glass from ordinary glass

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Coated GlassCoated glass is the coating of one or more layers of metal, alloy or metal compound film on the surface of the glass to change the optical properties of the glass to meet a specific requirement. According to the different characteristics of the product, coated glass can be divided into the following categories: heat reflection glass, low emissivity glass (low-E), conductive film glass, etc.

Heat-reflective glass is generally coated with one or more layers of metal or its compounds on the surface of the glass, so that the product is rich in color, has appropriate transmittance for visible light, has a high reflectivity for infrared rays, and has a high absorption rate for ultraviolet rays, therefore, it is also known as sunlight control glass, which is mainly used in buildings and glass curtain walls; Low-emissivity glass is a thin film system composed of multi-layer silver, copper or tin and other metals or their compounds on the surface of glass, the product has a high transmittance to visible light, a high reflectivity to infrared rays, and has good thermal insulation performance, mainly used in construction and automobiles, ships and other vehicles, due to the poor strength of the film, it is generally made of insulating glass; Conductive film glass is coated with conductive films such as indium tin oxide on the surface of glass, which can be used for heating, defrosting, defogging and liquid crystal display of glass. There are many production methods for coated glass, mainly including 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, which can be plated with a variety of colors on the white glass substrate, and the corrosion resistance and wear resistance of the film layer are good, and it is one of the most produced and used products at present. There is a certain gap between the variety and quality of vacuum evaporation coated glass and magnetron sputtering coated glass, which has been gradually replaced by vacuum sputtering method.

The chemical vapor deposition method is to introduce a reaction gas into the float glass production line to decompose on the hot glass surface, and evenly deposit it on the glass surface to form coated glass. This method is characterized by low equipment investment, easy control, low product cost, good chemical stability, and can be used for thermal processing, which is one of the most promising production methods at present. The sol-gel method is simple to produce coated glass, and the stability is good, but the disadvantage is that the light transmittance of the product is too high and the decoration is poor.

The most widely used coated glass is heat-reflective glass and low-emissivity glass. Basically, two production methods are used: vacuum magnetron sputtering method and chemical vapor deposition method. The world's most famous vacuum magnetron sputtering equipment manufacturers include the American BOC company and the German Leybold company, and the famous manufacturers of chemical vapor deposition method include the British Pilkington company.

Since the late eighties, there have been hundreds of coated glass manufacturers in China, including China CSG Corporation and Shanghai Sunshine Coated Glass Co., Ltd., and chemical vapor deposition manufacturers such as Shandong Bluestar Glass Company and Yangtze River Float Glass Company. ]

Summary. How to distinguish between coated glass and ordinary glassHow to distinguish between coated glass and ordinary glass.

How to distinguish between coated glass and ordinary glassHow to distinguish between coated glass and ordinary glass.

Coated glass is also called reflective glass. Coated glass is the coating of one or more layers of metal, alloy or metal compound film on the surface of glass to change the optical properties of the glass to meet a specific requirement. Some ordered coated glass, but did not know how to distinguish whether it was coated glass or not at the time of acceptance, so they directly accepted it.

Ignition method: You can hold a lighter in front of the glass to observe the reflection of the flame on the glass. Two flames are clearly visible, and the rear flame is slightly brighter, so the membrane surface is on the back; If the back flame is difficult to see, or the front flame is noticeably bright, the front (near the lighter) is the membrane.

If both sides are the same, it's uncoated glass. Touch method: Gently touch the glass surface with wet paper towels or fingers, the smoother side is the glass surface, and the side with astringent stagnation feeling is the coated surface Resistance method:

Test the glass surface with an ordinary multimeter, the side with an infinite resistance value is the glass surface, and the side with a smaller resistance value is the coated surface Image method: use a lighter flame close to the glass surface, and the image with different colors is ghosted for low-e glass, and the color is red Instrument method: Use a special film surface tester to display the light for the film surface, and vice versa for the glass surface.

Glass coating is a chemical polymer material, which is used in the field of automotive beauty due to its high-density chemical properties. At the same time, the glass coating has the characteristics of high gloss, anti-oxidation, acid and alkali resistance and UV resistance. After coating the paint surface, the paint surface has a good gloss, and the paint surface is isolated from the outside world, which plays a good role in protection.

The characteristics of the glass coating are as follows:

1.In order to prevent the oxidation and aging of the paint, the real glass coating does not contain petroleum components, and after application, a hard inorganic (glass crystal) film will be formed on the surface of the paint, which is tightly bound to the paint and will never fall off. The paint is completely isolated from the air body, which can effectively prevent the paint from oxidizing and discoloring due to external factors.

2.Corrosion resistance. The hard, non-organic (glass crystal) film itself does not oxidize, and at the same time, it can also prevent the corrosion of the car paint by external acid rain, flying insects, bird droppings, etc.

The dense glass crystal film has super corrosion resistance, and the coating can effectively prevent damage caused by corrosive substances such as acid rain to the car paint, and prevent the paint from fading.

3.High temperature resistance. The glass itself has the characteristics of high temperature resistance, which can effectively reflect sunlight and external heat radiation to prevent high temperature damage to car paint.

4.Scratch resistant. The hard non-organic (glass crystal) film can increase the surface hardness of the car body to 7h, which is much higher than the 2h-4h of car wax or car glaze, and can better protect the car paint from the erosion of sand and gravel.

5.Easy to clean. The ion coating is super self-cleaning and water repellent, and it is not easy to adhere to dust and dirt. When cleaning, only clean water can be used to achieve the cleaning effect, so that the vehicle can maintain a high level of cleanliness and gloss.