[China Glass Net] There is a saying that summer is the peak season of explosion-proof membranes, so many people in autumn and winter also have less enthusiasm for filming, and many people think that the glass of their original factory is already With the function of blocking ultraviolet rays, it is possible to use no film in winter. Is that really the case? Suzhou Makeit Technology Co., Ltd , https://www.psffiber.com
Have green glass, do you need a film in autumn and winter?
It is understood that the winter and spring seasons are the seasons with less global ozone layer in the four seasons. Without the protection of the ozone layer, the ultraviolet rays will take advantage of it, and the winter sun will take a long time. In the long-wave ultraviolet (UVA), medium wave In the three wavelengths of ultraviolet (UVB) and short-wave ultraviolet (UVC), long-wave ultraviolet (UVA) in winter sunlight is more likely to damage the skin, and it is easy to cause fading of instruments, interiors, etc., and the "power" of such ultraviolet rays is even It is more destructive than the mid-wave in summer. So, if you have green glass, can you block these harmful ultraviolet rays without film?
At present, the parameters of the explosion-proof membrane on the market are: infrared blocking rate: 95%, visible light transmittance: 72%, ultraviolet blocking rate: 99.9%, total blocking rate: 68%. In the three kinds of light, such as ultraviolet light, visible light and infrared light, the ultraviolet light has a strong penetrating ability and a short wavelength; the visible light wavelength is moderate; and the infrared wavelength is long. Among them, visible light and infrared light are more heat, although ultraviolet light has high energy, but it is attenuated by absorption of the ozone layer and the upper atmosphere, and the wavelength of ultraviolet light does not easily resonate with air and objects, and conducts heat, but it is easy to put people. Get black.
Previously, some green glass parameters were tested, which already had the basic UV resistance, but it was still quite a lot worse than the explosion-proof film. In order to achieve a large insulation effect, the film is still necessary.