Coating method for non-continuous high-metal-texture film layer

Abstract

The invention discloses a coating method for a non-continuous high-metal-texture film layer. The coating method comprises the following steps of: spraying UV (Ultraviolet) priming paint; coating a high-metal-texture nonconductive film layer; and spraying UV finishing paint, wherein the step for coating the high-metal-texture nonconductive film layer is a step for coating a product to be coated by taking an aluminum-silicon alloy of which the length*width*thickness is 1,009 millimeters*124.7 millimeters*8 millimeters as a target material with a magnetron sputtering coating technology. In the invention, a continuous magnetron sputtering coating technology is applied to plastic materials such as mobile phone shells, outer frames of panel computers and the like, the aluminum-silicon alloy is taken as the target material, and a magnetron sputtering target material is precipitated on a substrate in the form of atoms, so that the film layer is dense and firm, and is stable even exposed in the air for a long time after coating. A product obtained with the coating method has ultrahigh metal texture and high weather resistance. The coating method is easy to operate and control, is nontoxic and environmentally-friendly, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of vacuum coating, in particular to a vacuum coating process for plastics such as mobile phone casings and tablet computer frames, and in particular to a coating method for discontinuous high-metallic film layers. Background technique [0002] At present, the electroplating industry is facing two major social problems: occupational health and environmental pollution. With the EU ROHS (Restriction of Hazardous Substances, directives on restricting the use of certain hazardous components in electrical and electronic equipment), WEEE (Waste Electrical and Electronic Equipment, waste electrical and electronic equipment), EUP (Energy-using Products, energy consumption Products) directive implementation and countries to solve environmental problems. Enterprises and workers are highly concerned about corporate social responsibility and occupational health. The traditional high-pollution and high-hazard industrial ...

AI Technical Summary

Problems solved by technology

[0004] At present, the non-conductive film coating process is generally mature, and the evaporation coating process after preheating is generally used, most of which use the same process parameters and materials, and use indium tin alloy (30:70) evaporation coating; however, indium tin alloy In the process, the color is not uniform, the gloss is not enough, and the metal texture is poor. In the natural light environment, because the indium tin alloy is easy to oxidize, the product cannot be exposed to the air for too long

[0005] At present, most domestic non-conductive film coating processes use evaporation monomer coating machines to prepare discontinuous conductive films, which have problems such as low output, poor uniformity, and high manufacturing costs. In addition, indium and tin are rare metals, and the production cost is high. no less

[0006] Magnetron sputtering coating technology can make the coating layer have uniform color, high definition, durable heat insulation and no fading, etc., but the sputtering efficiency in this technology is easily affected by many factors, especially the target material. Effect of selection and its size