1.Vacuum evaporation coating: The vacuum coating machine using thermal evaporator produces coated glass. Because the overall production is intermittent, some of the cleaned glass often needs to wait in the workshop for a period of time before coating the coating chamber. At this time, The glass will be subject to secondary pollution, causing the film layer coated on the contaminated part to fall off easily, the uniformity of the film layer is poor, the rainbow color difference and the reflectance are easy to be high, and the glass is only coated with a film, which is easily discolored in the air and Can not produce large size glass. Therefore, the Ministry of Construction has made clear that such coated glass is not easy to be used as curtain wall glass. In China, it can be seen that the curtain wall glass of many buildings appears white around each piece of glass, black in the middle, and stripping of the stripe is caused by the wrong selection of the coated glass. Of course, the price of such glass is generally low at 80 yuan to 100 yuan / m2. Individual decoration companies have chosen such glass pits to swindle users.
2.Vacuum magnetron cathode sputtering method: flat glass in a vacuum chamber with high vacuum, working gas positive ions between the two poles of negative voltage fly to the cathode under the action of orthogonal electromagnetic field, in a short cathode position A large amount of energy is obtained in the drop zone to rapidly bombard the target, so that the cathode (target) atoms fly toward the glass substrate-glass deposition film, and the sputtered secondary electrons (this process is called γ process) act in the electromagnetic field. Under the rotation of the spinning wheel to participate in the impact ionization, the crabs carry the carriers, so that the energy source continuously bombards the cathode, providing a sufficient amount of positive ions, forming a plasma zone for continuous glow discharge, which can complete the multi-layer coating at one time. Excellent film uniformity, excellent edge coverage and good adhesion. What is particularly mentioned here is the coating machine produced by the German "LH" company. The advantage is that it is superior to and different from other vacuum magnetron sputtering coating machines: the magnetic field on the planar magnetron target is generated by the ring magnet. The semi-circular ring magnet can be regarded as a combination of infinite T micro-fan columnar magnets. Therefore, the corresponding magnetic label potential is relatively stable, in order to produce a uniform and firm coating layer.
3.solution gel method: also known as double-sided coating impregnation method, the coating method is to immerse the glass in a chemical solution, forming a film on the surface of the glass, the chemical film layer adheres to the surface of the glass, the film thickness can pass 50% of the incoming rays, the rest reflected off, and absorbed little light.
4.powder thermal spraying: the process is in the float glass production line in the glass dewatering chamber, the metal chemical powder reagent is evenly sprayed directly on the hot glass, after the reagent is overheated and decomposed, a metal oxide is formed on the surface of the glass. The film, which exhibits different transmission and reflection colors due to the difference in metal. Such coated glass, also known as in-line coated glass, is extremely inexpensive. Because there is only one film, the transmission rate is high and the color is light and dim. Generally, only the green and blue are coated on the colored glass, and the color of each batch also changes due to the different batches of colored glass. The advantage is that this type of coated glass can be directly added to work hot bending and tempering.
In addition to the above four coating methods, there are plasma enhanced chemical vapor deposition and arc ion plating. Both of these produce less coated glass and are not suitable for use in curtain wall construction.
