[China Glass Network] First, the important parameters of the solar film
When consumers choose the solar film, they are often confused by the parameters declared by the merchants, "visible light transmission rate of 80%", "UV blocking rate of 99%" and so on. So what are the meanings of these parameters? Can you prove the performance of the solar film? This requires us to understand. These parameters are important performance indicators of the solar film, including: visible light transmittance (VLT), visible light reflectance (VLR), ultraviolet transmittance (UVTransmission), solar blocking rate (TSER), as described below.
1. Visible light transmittance (VLT)
The ratio of the visible light transmitted through the film glass to the incident visible light flux. Simply put, it is the ratio of the visible light band passing through the glass film. The higher the value, the clearer the value. The lower the value, the darker the color of the film. The high light transmission front gear makes the field of view clearer and safer to drive. The side gears use a low light transmittance film to protect your privacy. The high-quality automobile front bump film has a high visible light transmittance. According to the relevant regulations, the visible light transmittance of the front windshield must be greater than 70%, so as not to affect the driving safety.
2. Visible light reflectance (VLR)
This value is the ratio of the light that is reflected to the outside by the film-coated glass. High-quality car foil should be low internal reflection, the reflection of the interior should be as small as possible, and it can not affect the line of sight. The visible light reflectance of the transparent glass is 8%.
3. UV transmission rate (UVTransmission)
The ratio of the ultraviolet light transmitted by the film glass to the incident ultraviolet flux (280-380 nm). Simply put, the greater the transmission rate, the more UV rays penetrate into the car, and the more serious the skin damage and aging of the interior. It should be noted that excessive UV exposure can lead to an increased risk of skin cancer.
4, solar barrier rate (TSER)
In layman's terms, what percentage of solar energy can be blocked is the solar barrier of this foil. This is an important parameter of the solar film, because the main source of heat is the infrared light in solar energy. The size of the solar barrier directly affects the thermal insulation properties of the solar film.
Second, the structure of the solar film
Most consumers don't know much about the structure of the film. This thin film has a huge price difference, ranging from a few hundred yuan to tens of thousands of yuan. There are some users who can't help but ask for a price of several thousand. What is the technical content? Really worth so much money? To figure out these problems, let's first understand the structure of the solar film.
The figure above is a structural diagram of a dyed metal film. From this figure we can see that the thin solar film consists of 8 different layers, from the outside to the inside: scratch-resistant layer, deep-dyed polyester film, Metal layer, synthetic rubber, deep dyed polyester film + UV absorber layer, mounting glue + UV absorber layer, release layer and protective film. Each layer of the solar film is responsible for different functions, as described in more detail below.
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