Metal film thermal evaporation coating equipment for plastic

Metal Film Thermal Evaporation Coating Equipment For Plastic is an important equipment in the field of plastic surface treatment. It uses thermal evaporation technology to form a uniform and dense metal film on the plastic surface, thereby significantly improving the surface properties of the plastic. Here's how Metal Film Thermal Evaporation Coating Equipment For Plastic works.
1. Thermal evaporation principle:
The principle of thermal evaporation is the core of Metal Film Thermal Evaporation Coating Equipment For Plastic. This principle is based on the heat conduction and phase change processes in physics, which is the transformation of metal source materials from solid to gaseous state through heating. In the device, the metal source material is placed near the heating source. When the heating source is turned on, the metal source material begins to heat up and gradually reaches its evaporation temperature. At this time, the metal atoms or molecules gain enough energy to escape from the surface of the metal source material, forming metal vapor.
2. Vacuum environment:
In order to ensure that metal vapor can be deposited smoothly on the plastic surface, a certain degree of vacuum needs to be maintained inside the equipment. In a vacuum environment, the density of gas molecules is low, which reduces the collision and scattering between metal vapor and gas molecules, thereby ensuring that metal vapor can spread in a straight line and evenly cover the plastic surface.
3. Deposition process:
Metal vapor propagates in a straight line in a vacuum environment. When it encounters a lower-temperature plastic surface, metal atoms or molecules will lose energy and condense and nucleate on the plastic surface. With the continuous supply of metal vapor, these nuclei gradually grow and connect with each other, eventually forming a uniform and dense metal film on the plastic surface.