The Middle East War in 1973 led to the global oil shortage. In September 1975, the United States Congress passed the Energy Conservation Act, which pasted the stained film on the glass wall of the building to block the burning sun and reduce the use of air conditioning. After many days of popularization, the film on the windows of cars also began to be popular because of the window film area to play a role in heat insulation.

Dyeing film appeared at the end of the 1970s. Through the mixing of industrial dye and the material of thermal insulation film, the color of thermal insulation film can be changed from transparent to dark, producing different visual effects and thermal insulation effects. Its industrial materials contain a large number of toxic substances, which will cause great harm to human health during construction in the carriage. This kind of product is completely eliminated by the market in the later stage.

The metal film appeared in the early 1980s, mainly using aluminum, nickel and other common metals, and coating on the film through special process to form a metal layer. The light transmission of this film is inversely proportional to the heat insulation. The more transparent the film is, the less heat insulation it is, and the more heat insulation it is, the less light transmission it is. Moreover, due to the problem of preparation process, such products are easy to produce uneven coating, resulting in blurred vision and color difference.

The endothermic film appears at the end of the period, and its characteristic is to achieve the effect of temporary thermal insulation by absorbing heat. The disadvantage of this kind of film is that as an industrial chemical agent, the absorbent will release toxic substances after absorbing heat, which will affect human health; After heat saturation, there will be secondary heat transfer in the vehicle, which has the effect of false heat insulation.

This kind of products came out in the early 1990s. By preparing precious metal oxides into nanoscale particles, and by using the most advanced magnetron sputtering technology, they are evenly distributed on the film substrate. Through different arrangements, they achieve the advantages of spectral screening and thermal insulation of infrared rays of various bands. Their products are characterized by high definition, thermal insulation performance of more than 90%, and no blocking of signals. Real 5G window film.

 

Intelligent spectrum screening non-signal barrier window film is more functional than the previous three car window films, although it is expensive. It is a choice for motorists who pursue quality of life and care about health.