What is the principle of anti-fog goggles
The temperature of the water environment around the goggles is relatively low, and the local body temperature of the people in the country is relatively high, and the air in the goggles is easy to Condensation on the inner wall of the goggles forms a patch of tiny water (fog) droplets. These small mist droplets refract light, thereby blurring one’s vision. Therefore, the anti-fog of swimming goggles
is to make this piece of fog droplets unable to exist stably. Now the general practice is to modify the surface of the swimming goggles to be super hydrophilic, so that once the small mist droplets condense on the surface of the swimming goggles, they will spread quickly to form a water film. Once the water film is formed, the mist will condense on the water film and not become beads. (ball) shape, to achieve the effect of anti-fog.
How to choose anti-fog swimming goggles
First of all, in terms of comfort, the softness and fit of the silicone ring are the most important. It is necessary to choose a comfortable silicone ring, so that the eyes will not be strangled when swimming. At the same time, it should be close enough to the face so that no water leaks in.
Secondly, it is the lenses. The materials of the lenses of swimming goggles are also very particular. It is best to choose materials with anti-impact properties, so that the lenses will not be hairy after wearing for a long time, and the underwater vision is still clear. At the same time, it is best to be light, and the effect of water resistance is better.
As for the choice of the rear mirror strap, of course, it can also be adjusted, it is suitable for different people’s head shapes, and the softness is also very important.
The size of the frame directly determines the size of the field of view. The large frame has a large field of vision, but the swimming goggles with the small frame look more handsome, so everyone can choose this.
Classification of organic anti-fog lenses
1. Coated anti-fog lenses
By coating Layers of micropores prevent fog in the form of layers. It can be sealed on mirror and glass, and the anti-fog coating is generally rich in conductive materials A TO and silicon oxide. A super-hydrophilic antistatic antibacterial agent is formed, which has inferior antifouling, antifogging and antistatic effects.
2. Electric heating anti-fog lens
The humidity of the mirror surface is increased by electric heating. Thus, the fog layer cannot be formed. In addition to that, the mist evaporates quickly. There are other types of anti-fog mirrors on the market.
3. Nano-composite anti-fogging lens
The nano-glass anti-fogging lens film is firmly combined with the glass using physical and chemical phases. Since water cannot form water beads on the surface of the substrate, the surface of the treated glass has a hydrophilic function. Instead, a uniform water film is formed to achieve an anti-fog effect.
Classification of inorganic anti-fog mirrors
1. PVC-resistance wire anti-fog film
The material is: PVC + resistance wire. The characteristics of this film: lead salt stabilizer will be added during production, which is toxic, softens when it is heated, becomes hard when power off, becomes brittle, and is easy to age. If it breaks at one point, the entire anti-fog film will be scrapped. Advantages: good ductility and electrical insulation performance, easy to obtain materials, and cheap. The overall service life of this membrane is 4-5 years.
2. PET-resistance wire anti-fog film
The material is: polyester + resistance wire. The characteristics of this film are: PET film surface is smooth, non-toxic and environmentally friendly, heat-resistant and wear-resistant, corrosion-resistant, and anti-aging. The overall service life of this membrane is 8-10 years.
3. PET-carbon fiber anti-fog film
The material is: polyester + carbon fiber. The characteristics of this film are: the production process is cumbersome, the construction period is long, and the cost is high. High toughness, tensile strength, long service life (more than 20 years), surface heating element, high temperature resistance, and oxidation resistance. Multiple lines are connected in parallel, even if a certain point breaks, it will not affect the anti-fog performance of the entire film, the temperature can be adjusted appropriately within a certain range, it is not easy to deform and break, and it can be reused. Because of the stable performance and long service life of this film, this anti-fog film is generally selected for the decoration of high-end hotels. But this carbon fiber anti-fog film, because of the complex material selection and processing, so the price of carbon fiber anti-fog film is relatively high.
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