1. Definition of Anti-Fog Film
Anti-fog film is a thin film that can prevent fog from forming on the surface of objects. It is mainly made of a special polymer material, which has a certain degree of transparency and elasticity. The principle of anti-fog film utilizes physical principles, allowing it to change the distribution state of water molecules on the surface of objects.

(The principle of anti-fog film mainly relies on its special nano-material coating, which has two major characteristics: one is anti-fog, and the other is self-cleaning. When water vapor in the air comes into contact with the anti-fog film, the tiny structures on the coating can quickly disperse the water vapor, preventing it from condensing into fog on the surface of the object.)

The working principle of anti-fog film can also be explained by hydrophilic anti-fog film, which absorbs some water vapor and evenly distributes it on the surface of the object through the application and curing of the anti-fog coating on the surface, thereby reducing the impact on visibility. This coating ensures that even in extremely low-temperature environments, such as -22°C, fog will not form when the frozen display cabinet is opened, and the fog quickly dissipates after closing the door, improving the visibility of the product.

2. Working Principle of Anti-Fog Film
The working principle of anti-fog film is to prevent water vapor from accumulating on the surface and forming fog by changing the surface energy and roughness. At room temperature, the magnitude of surface energy is mainly determined by the surface chemical composition and the size of surface roughness. The higher the surface energy, the less likely it is for water fog to form.

The anti-fog film forms many tiny convex and concave structures on the surface, thereby increasing the surface roughness and changing the surface energy. When water vapor encounters these convex and concave structures, it forms a barrier that is difficult to cross, preventing the formation of water droplets and fog. Therefore, the anti-fog film allows water vapor to form a thin water film on the surface instead of accumulating into fog.

In addition, the surface of the anti-fog film also contains hydrophilic materials, which allow the water film to spread more quickly, thereby reducing surface tension. These characteristics give the anti-fog film a very good anti-fog effect.

3. Precautions for Anti-Fog Film
When using anti-fog film, please pay attention to the following points:

1. Do not use rough items to wipe the surface of the anti-fog film to avoid damaging its fine convex and concave structures and surface chemical components.

2. Do not use high-temperature water or acidic substances to clean the surface of the anti-fog film.

3. Long-term placement of the anti-fog film may lead to surface failure.