Dragon Film, formerly known as the American Sono Cote Company, is the inventor of the world's first heat insulation film. In 2011, after acquiring Shaohua Technology of the United States with magnetron sputtering technology, it has become the only architectural glass film production supplier in the world with all production processes and production equipment, and can produce the most complete glass film products, with the world's largest production line scale and output. Solutia was acquired in 2012 by chemical giant Eastman, the world's largest supplier of polyester plastics for packaging and a leader in the global chemical industry.
Divided by manufacturing process, the development of automotive window film has gone through four stages: coating and composite process, deep dyeing, vacuum evaporation, and magnetron sputtering. At present, the complete production process technology of Dragon Film includes all processes except coating and lamination, in addition to patented anti-scratch coating and the most advanced sandwich synthesis process.
Deep dyeing and vacuum evaporation are the core technologies of Dragon Film. Deep dyeing is to pass PET through the dye pool, penetrate the dye into the deep part of the PET substrate through a specific process, and add an endothermic agent to absorb the infrared rays in the sunlight to achieve the heat insulation effect. However, due to the absorption of visible light at the same time, the visible light transmittance is not enough and the clarity is poor. In addition, when the heat absorbed by the heat absorber reaches saturation, the absorbed heat will be radiated back into the car in a far-infrared way, making people feel more hot. These two processes are currently widely used in the low-end car film market, and Dragon Film occupies a considerable leadership in the low-end market, and even manufacturers such as 3M and Shurejia will find it to buy dyed PET substrate semi-finished products for the production of low-end automotive window films.
Most of the common dyed car films on the market are deep dyeing processes, although the performance is average, but its price is relatively cheap. Due to the limitations of deep dyeing technology, it is often combined with vacuum evaporation, magnetron sputtering and other processes. In the product line of Dragon Film, only a small number of window films in 4S stores and franchised stores use this deep dyeing process, such as Zhixuan, Changyi, and Siyi three series of side and rear windshield window film models. When users buy in 4S stores, they should be careful not to be misled and deceived by sales.
Vacuum evaporation refers to the process of vaporizing the coating material by heating and evaporation under vacuum conditions, and the particles fly to the surface of the substrate to condense into a film. Most of the metal reflective films labeled by Dragon Film are of this type, such as the Zunyi X15 and X30 side tailgates of the 4S store channel, and the side tailwinders of Siyi R15 and R35 and so on. Although the metal film is good and long-lasting, it can have an impact on the signal in the car, and the internal reflection of the metal film is also high. Generally speaking, an internal reflectance above 11% will make people feel uncomfortable.
Magnetron sputtering film is the most high-grade automotive window film on the market, which evenly distributes the metal material on the PET substrate through magnetron sputtering technology to form a nano metal layer. It has the advantages of high visible light transmittance and low internal reflection. Excellent magnetron sputtering solar film is made of up to 5 to 11 layers of precious metal sputtering, the more metal layers, the more expensive the price, due to the mutual extinction of the metal film layers, the reflectivity of the automotive film drops significantly, and the general high-end magnetron sputtering film can reduce the internal reflection to less than 9%. Compared with vacuum evaporation, magnetron sputtering metal film has a more uniform thickness and better product consistency.
The highest-end magnetron sputtering film of Dragon Film is the Houyi series, and its unique "gold ratio" technology intelligently proportions rare metals such as gold, silver, and indium through high technology to achieve the improvement of comprehensive performance including heat insulation. Once launched, it caused a lot of sensation in the industry and is considered to be the benchmark for high-end window films in the industry. The visible light transmittance of the front gear of the Houyi series is 72%, and the total solar blocking rate is as high as 54%. The price in China is about 16,000 yuan.
It is worth mentioning that magnetron sputtering film has always been the strength of quantum film/Shurejia before, and the performance of its top products has achieved the first in the world. Dragon Film only obtained magnetron sputtering technology from Shaohua Technology in 2011, and since then, relevant R&D personnel have conducted in-depth research on key technologies such as magnetron sputtering, so that there are products like Houyi. Dragon Film provides a lifetime warranty for the Houyi series, which is unparalleled in the industry, which is enough to see Dragon Film's confidence in its products.
