Film selection: focus on "three rates"
People in the industry have systematic and professional knowledge in identifying car films, but for most amateur car owners, it is most practical to master some simple identification methods when choosing car films. In this regard, Huang Guiyong summarized the identification method as "looking at the smell and asking".
To distinguish the quality of car film, we should first pay attention to the "three rates", that is, light transmittance, ultraviolet resistance and heat insulation. The light transmittance shows that no matter the color depth of the car film, it is very clear from the outside of the car, and it can maintain a good perspective effect at night and rainy days. For the simple judgment of heat insulation rate, the owner can use the sun lamp to illuminate in the car beauty shop and feel the temperature change after sticking the film.
Take the previous barrier film as an example, the slightly better car film has a light transmittance of over 70%, an ultraviolet resistance of 98%-99% and a heat insulation rate of over 48%. For side windows and rear gears, the light transmittance of the selected car film only needs to be above 60%. Gao Jie introduced that the car film with good quality is selected for the whole car, and the market price in Fuzhou is around 1.800 yuan. Of course, the actual selling prices of different brands are still different. For example, the best car film on the market, the price of the whole car film can reach 10,000 yuan, and the warranty can reach 8- 10 years.
Secondly, judging the quality of the car film can also be judged by the feel. High-quality films are thick and smooth to the touch and have enough toughness. The inferior film is easy to wrinkle, thin and soft. In this regard, Huang Guiyong introduced a small trick. If you can't feel the quality of the film by hand, the owner can take a small piece of film and scratch it on the glass. If the film is easy to leave marks or rupture, it means that this film is inferior, so don't choose it.
In addition, the owner can peel off the car film and smell it. Inferior films often leave a lot of benzene in the adhesive layer, which has a pungent smell. If you choose inferior products, it will seriously affect the health of the owner.
Extended data:
On the Classification of Automobile Film
There are three kinds of automobile thermal insulation films: dyed film, metal film and magnetron sputtering film. . In order to make it easier to understand, we can divide the types of car film into six categories.
First, dye the film. Refers to the lowest automotive film, which is thin, non-insulating and easy to fade. Generally, there are many small shops, which are very cheap. It only costs one or two hundred yuan to paste the whole car. "Tooth waist is pale" is its most remarkable feature. This kind of membrane is generally produced in Taiwan Province Province, China.
Step 2, coating the printed film. This is a unique craft in Korea. Generally thicker. This kind of film has good heat insulation, but its perspective is slightly poor.
Third, ordinary metal film. It is made by spraying metal on the colorless original film layer. Commonly used metals are aluminum, iron, etc. This kind of membrane is generally produced in China, Indian, Japanese and American. This metal film is the most common one on the market. The composition of the film (generally, metal is evaporated by heating on the film-based material), but this film has general perspective and thermal insulation, but the price is not low. General beauty shops often use this kind of film to pretend to be the top film. Many well-known brands are actually this kind of ordinary metal film. Because it entered the market earlier, consumers mistakenly thought that this film was a high-grade film.
Fourthly, nano-ceramic membrane. Based on nano titanium nitride, it is made by combining magnetron sputtering technology and metal nitriding technology, which is durable, not easy to corrode and does not interfere with electromagnetic signals. The production area is not limited, and the United States, Japan and China all have this capacity. Amber optical nano-ceramic thermal insulation film is the latest ceramic film (in February, 2006, the global patent for multilayer nano-ceramic thermal insulation film was successfully applied for +0: 6,188,512).
5. Precious metal film. As the name implies, this kind of film also sputters metal on the colorless original film layer, but the difference is that all the precious metals such as chromium, titanium and platinum are sputtered. In addition, the sputtering method of this film is "magnetron sputtering". This is a complicated process. This film is characterized by natural color, good light transmittance and good heat insulation.
Six, magnetron sputtering coating. Multilayer polyester film technology. This is another technical trend of high-end movies. By multi-layer extrusion technology, 240 layers of polyester films are stacked together to make a thermal insulation film with a thickness of only 0.05mm, which has the characteristics of high visible light transmittance, good thermal insulation, long service life and no electromagnetic signal interference.
References:
Baidu Baike car window film