How to distinguish the quality of energy-saving glass film performance?

1. Visible light transmittance. The main functions of doors and windows are lighting and ventilation. Therefore, for glass, the higher the visible light transmittance of the film, the better. If it is too low, it will affect indoor lighting and cause lighting to turn on. To lose the energy-saving effect, the general visible light transmittance should not be less than 60%;

2. Infrared blocking rate. This band accounts for 54% of the total heat energy of the sun. The higher the blocking rate value, the better. Generally, the blocking rate can reach more than 70%. There are even some businesses that take advantage of the general consumer’s lack of knowledge about films to use infrared. The barrier rate is misleading as the total solar energy barrier rate. It boasts that the visible light transmittance of its film is 70%, and the total solar energy barrier rate can reach 90%. This is obviously misleading, and it can be seen from the solar energy distribution map that it is impossible;

3. Ultraviolet blocking rate, which is an indicator for measuring the amount of ultraviolet rays entering the room. This technology is very mature and can be adjusted according to requirements. According to the physiological needs of the human body, this indicator is generally set at above 95%.