Vacuum coating means that a metal or metal compound is vaporized to the surface of the material (usually a non-metallic material) in a vacuum environment and is a physical vapor deposition process. Because the coating is often a metal film, it is also known as vacuum metallization. The generalized vacuum coating also includes vacuum deposition of non-metallic functional films such as polymers on the surface of metal or non-metallic materials. In all the plating materials, the most common plastic, followed by the paper coating. Compared with metal, ceramics, wood and other materials, plastic has a sufficient source, easy to control the performance, easy processing and other advantages, so a wide range of plastic or other polymer materials as decorative materials, a large number of applications in the automotive, home appliances, Packaging, process decoration and other industrial fields. But most of the plastic material surface hardness is not high, the appearance is not gorgeous, low wear resistance defects, such as the surface of the plastic deposited in a thin layer of thin metal film, you can give plastic Cheng Liang metal appearance, the appropriate metal source also Can greatly increase the wear resistance of the surface of the material, greatly broadening the decorative and application of plastic range.