[China Glass Net] Glass film is widely used in bathroom glass of modern living room. Glass window film, also known as explosion-proof film, anti-riot film, heat-insulating film, glass window film has heat preservation, heat insulation, energy saving, explosion-proof, anti-proof UV, beautify the appearance, and avoid privacy. Here is a brief introduction to the knowledge of balcony window glass film.
First, the structure of the glass window film
1, wear layer 2, insulating layer 3 a metal, composite adhesive 4, UV absorbing layer 5, a transparent PET base layer 6 security, <br> <br> two mounting adhesive, the glazing film works
There are three forms of heat conduction: radiation, conduction, and convection. The thermal insulation film is mainly used to insulate it in the form of radiation and convection.
Sunlight is composed of light waves (electromagnetic waves) in various bands. These energies reach the Earth's surface in different forms, and energy is converted into heat in the form of radiation.
Three bands of the solar spectrum:
Ultraviolet band: 280-400nm wavelength, excessive UV exposure can lead to skin cancer, which can lead to fading of carpet, curtains, fabrics and furniture paint.
Visible spectrum band: wavelength between 380-780nm, which is characterized by the only spectrum visible to the naked eye. The visible light band can be further divided into different colors (red orange, yellow, green, blue, purple, and seven colors), which has no direct harm to the human body.
Infrared band: between 700 and 2400 nm (nanometer), it is characterized by the fact that we can directly feel the "invisible" heat of the sun, which contains the most energy, so the heat is also high.
The near-infrared rays of each band constitute 53% of solar energy, ultraviolet rays account for 3%, and visible light accounts for 44%.
Third, the working principle of the glass window film
Metals such as aluminum, gold, copper, silver, etc. are formed into a multi-layered, dense, high-insulation metal film layer by vacuum spraying or magnetron sputtering. The electrons (free electrons) of the outer shell layer in the metal material are generally not bound by the nucleus. When illuminated by the light wave, the electric field of the light wave causes the free electrons to absorb the energy of the light, and generates an oscillation of the same frequency as the light, and the oscillation is released again. Light of the same frequency as light is called reflection of light. The higher the conductivity of the metal, the shallower the penetration depth and the higher the reflectivity. These metal layers selectively reflect various thermal energy sources in the sun, including infrared, ultraviolet, and visible heat, and then combine with the color of the film to absorb solar heat radiation, and then release it twice, with outdoor The air flow takes away some of the heat. Thereby effectively functioning as an insulation.
The glass window film is attached to the surface of the glass, and has the functions of heat preservation, heat insulation, energy saving, explosion-proof, ultraviolet protection, beautifying appearance, avoiding privacy, safety and safety protection, and has wide application range, and is suitable for many places, and hopes for the above contents. The introduction is helpful for your use of glazing.
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