When the car lights we are driving in daily life are finished products, they must be plated with a layer of reflective membrane, such as: car lamp reflective membrane, reflector, front car lights, rear car lights, turning lights, license plate lighting, etc., all need Plating a layer of membrane, reflective coating and hydrophobic coating (lotus effect) process typical application of car headlight taillights and interior lighting.

pvd coating machine car lamp lamp -plated film thickness is 0.4-1.2 μm, the surface is flat, and it has a high gloss. Its aluminum plating method is divided into two types: bottomless plating and bottom plating. The choice of aluminum plating method is related to the nature of the substrate. Polyester (such as PET, PBT, PC) is a polar polymer, and its surface freed Do not have a bottom plating. That is, the aluminum plating on the substrate (such as PC polarity) is plated and then plated. Aluminum -plated protective membrane has the mechanical strength of aluminum film, blocking harmful gases (such as O2 in the atmosphere) or the erosion of the aluminum film [6], so that the plating layer has bright metal luster, excellent gas and light barrier resistance , Good moisture -proof, heat -resistant, puncture resistance, items are not polluted and corrosive during transportation, storage and use, and keeping clean and shiny.
Because the PC main chain contains ester base, the water absorption rate of substrate materials in a certain humidity environment (0.15% -0.19%) is high (0.15% -0.19%). There will be fog -shaped after aluminum plating caused by substrate absorption. PE, PP and other polyolefin materials and ABS are non -polar polymers. The surface is free and small, with low surface wet tension (generally 30DYN/CM), rough, and the binding force between the aluminum -plated layer is very poor. After pre -painting, it can obtain smooth and flat coats. It has a mirror effect and can cover the substrate to prevent the volatile impurities in the plastic substrate in the vacuum coating. It affects the quality of the coating. Therefore, this kind of material is generally used to improve the binding force between the coating and the substrate after pre -painting. At present, there are more acrylate primer in China, and the base paint formula is adjusted according to the type of substrate type. It is mainly thermal curing primer and ultraviolet light (UV) curing primer. The applicability is very good.
Most of the pvd coating machine plating lamp plastic parts are mostly placed after pre -coating primer, and then the cover of the protective film is the essence of the protective film is silica. The SiO2 thin film is very protective, which can make the aluminum film intact in 10%alkaline solution. In order to reduce the process of pre -coating primer and reduce production costs, some people have developed PBT -free painting materials and made new progress. No matter which method is adopted, the aluminum plated parts should be used for adhesion tests for the qualifications.