Vacuum silver anti-reflection protective film

Vacuum silver anti-reflection protective film

The anti-reflection protective film is used on the color LCD screen of the mobile phone, which can reduce the impact of the human eye on the external glare stimulation, improve the viewing comfort, and protect the eyes. Commonly used mobile phone substrates are PC or acrylic substrates. Both of these two substrates have the disadvantage of high reflectivity as the protective screen of the color liquid crystal display. Because the uncoated protective screen interface has a reflectivity of at least 4.2%, under strong light (such as sunlight), the intensity of the reflected light will seriously reduce the contrast of the display image. Therefore, if the surface of the protective screen is coated with an anti-reflection film with a reflectivity of less than 0.5%, the clarity of the display screen will be improved.

Reasons why vacuum silver-plated plastics need to be coated before vacuum coating:

1. After the plastic is formed, the surface must have a certain roughness, such as a roughness of 0.5um.

The vacuum coating layer is very thin, and it is difficult to cover the unevenness of the surface of the substrate. If the primer technology is used, the thickness of the light-cured coating is about 10~20um, and the roughness of the coating itself is below 0.1um, so the brightness of the coating can be greatly improved. .

2. Plastics contain moisture, residual solvents, monomers, oligomers, plasticizers, etc.

Plastics contain moisture, residual solvents, monomers, oligomers, plasticizers, etc., and volatile small molecules will escape from the surface in a vacuum or elevated temperature environment, which will seriously affect the adhesion of the vacuum coating to the substrate. The technology can hinder the escape of these small molecules and improve the adhesion of the vacuum coating to the substrate.

3. The thermal expansion coefficient of the plastic substrate and the vacuum coating is usually metal) is very different

The thermal expansion coefficient of the plastic substrate and the vacuum coating is usually metal), and the thermal expansion coefficient of the two is very different. During the heating and cooling process of the vacuum coating, the film is easy to break. The transition layer can reduce the accumulation of internal stress and the occurrence of cracks.

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