[China Glass Network] Professor Long Wenzhi, a member of the Standardization Technical Committee for Building Products and Components, believes that 90% of domestic architectural glass needs to be filmed. Of the newly built buildings in China, only 10% to 15% can meet the mandatory energy-saving standards set by the state, and more than 80% are high-energy buildings. The film on the automobile glass plays the role of heat insulation and heat preservation. The film on the door and window of the building also acts as a heat insulation function, which can reduce energy consumption and save energy. People begin to accept the concept of film insulation on the building, but because of the previous market It is full of fakes, mixed with fish and dragons, causing users to spend money, so the phenomenon that users want to buy and fear of buying fake goods, hinder the promotion of energy-saving glass film.
Ordinary users are difficult to distinguish the performance of energy-saving glass film, it is not clear which indicators of energy-saving glass film are the key, these key indicators can only be resolved through professional instruments, ordinary users in the purchase of energy-saving glass film as long as from three It is not easy to be able to measure and agree on the parameters of the indicators.
1. Visible light transmittance, the main function of doors and windows is lighting and ventilation. Therefore, the higher the transmittance of the film to the visible light, the better. If it is too low, it will affect the indoor lighting and cause the light to be lost. Effect, generally the visible light transmittance is not lower than 60%;
2, infrared blocking rate, this band accounts for 54% of the total solar thermal energy, the higher the barrier value, the better, the general barrier rate can reach more than 70%; even some merchants use the knowledge of the general consumer does not understand the film, the infrared The barrier rate is misleading as the total solar energy barrier rate, boasting its own film visible light transmittance of 70%, the total solar energy barrier rate can reach 90%, which is obviously misleading, can be seen from the solar energy distribution map is impossible;
3, UV blocking rate, which is an indicator to measure the entry of ultraviolet light into the room, this technology is very mature, can be adjusted according to requirements, according to the physiological needs of the human body, this indicator is generally set at 95% or more; consumers only need to buy energy-saving glass film The above three indicators are stipulated in the contract terms, and after the goods arrive, the products can be purchased, and basically they can purchase the products they are satisfied with, and then select the regular and qualified manufacturers to avoid risks.
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