As a new type of energy-saving building material, building window film is made of special polyester film, coated with various high reflectivity metals or metal oxides, and pressed by special technology. It is a window film with light transmittance and high heat insulation function.
The window film has a light transmittance of 87%, which ensures sufficient indoor brightness. Unlike curtains and shutters, which only block light without heat insulation, the metal spraying layer of window film can reflect and absorb up to 80% infrared rays. Window film can effectively block more than 90% harmful ultraviolet rays, which is much higher than other glass products, greatly prolonging the service life of furniture. In addition, the window film removed from the automobile window film also has the functions of explosion-proof, earthquake resistance and privacy protection.
Of course, the biggest function of window film is heat insulation. According to the measurement, when the outdoor temperature is 38-39℃, the indoor temperature of window film is 3-5℃ lower than that of ordinary room, which can save more than 30% electricity for air conditioning. In winter, the function of thermal insulation can be exerted by reducing the heat loss caused by glass, which is especially suitable for houses with large glass area facing south, west and east.
Architectural movies are very hot this year.
Building film has an immeasurable market prospect, and consumers' awareness of home film is gradually enhanced, which is followed by industry competition. According to Wei Wei, the head of Wuhan Yimei Space Building Materials Co., Ltd., who is familiar with the industry situation, in 2008, China's building window film market quickly joined many new troops and nearly 30 building film companies.
Since the beginning of this year, through online publicity, community publicity and other market cultivation methods, Beijingers living in stoves have gradually begun to spend 2,000 to 3,000 yuan to put window films on their own glass, gradually warming up the whole market. Generally speaking, the roof membrane area of 100㎡ is about 20㎡.
There are tricks in choosing films.
Building window film requires high performance and technical parameters, which is difficult. At present, there are no domestic enterprises to produce, so most of them rely on imports. Because of this, some tricks will happen in the market from time to time.
In terms of price, 100-300 yuan /m2 or so. At present, the window film market of Wuhan buildings is basically domestic OEM sales of imported products, so there are also some situations where the sham as the genuine occurs.
For ordinary consumers, it is difficult to identify the quality of the film only from the appearance. Generally speaking, when choosing window film, we should carefully observe the relevant certification of products, as well as the authorization and import declaration procedures of foreign products in China market.
Of course, you can also use the money detector to test the ultraviolet blocking effect. After the light is separated by the explosion-proof film that blocks ultraviolet rays, the money detector cannot display the fluorescence on the RMB, and the fake film does not have this function.
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How much can film save?
Building window film can reduce the power consumption of air conditioning through efficient heat insulation and temperature control, and has been listed in the list of building energy-saving products by the government. So how to save energy? We can calculate an economic account:
According to the project report of Shanghai Real Estate Research Institute: "After laminating, the house of 16m2 can save 0.24 kwh of electricity for 24 hours. If the housing area of Shanghai Property Management is 1208 10000 m2, after deducting 50% of the housing acquisition rate, the living area is 60.4 million m2. Considering 50% window film, it is 0.665438+.
There are also some precautions when using film. Window film cleaning glass is the same as usual, but don't use strong acid and alkaline cleaning agent, and also avoid scratching the film with hard and sharp objects. After sticking the film, keep the original natural state of the glass doors and windows, so that the moisture can be quickly and naturally eliminated in the sun. It is best not to clean it within 10 days after pasting.