1. Clarity
This is the most important performance related to driving safety in the car film. The high-end car film has good see-through performance regardless of the color depth. It can also maintain a good line of sight at night and rainy days to ensure driving safety. The sun paper (commonly known as brown paper) that was widely used in the past is mostly dark in color and low in light transmittance, generally below 20% or even lower. A hole in the membrane to see the rearview mirror. When the sun is strong, the windows on both sides can still see the outside scenery slightly. On a dark rainy day or at night, the windows on both sides become blind spots, and nothing can be seen, which is quite dangerous for driving safety. of.
2. Insulation performance
The main function of car film is heat insulation, and heat insulation performance is not only the main criterion for evaluating the quality of a heat insulation film, but also the key to determining the price. However, heat insulation and light transmittance are contradictory, and the relative height of both is the most important criterion for evaluating the quality of the film. This criterion is mainly reflected in the comparison of the front film. To understand the thermal insulation effect of the film, you can use an intuitive method to judge, that is, block the sun with the glass with the film or irradiate it under the iodine tungsten lamp, and feel the thermal insulation effect with your face or hands. Note that there are currently some machines on the market that test thermal insulation data. Since almost all of them test the infrared fixed-point band, the data is inaccurate. Some data are very high, but they have no thermal insulation effect. Consumers better believe in the feeling of their own skin. .
3. Explosion-proof performance
This is also another important performance involving security. The material of ordinary or inferior car film is different from that of good car film. The film is very thin, feels soft, lacks sufficient toughness, is not resistant to ultraviolet radiation, and is easy to age and become brittle. The sheet breaks easily and cannot hold the glass together. The good car film is made of special polyester film as the base material. The film itself has strong toughness, which enhances the instant impact strength of the glass, and is combined with a special pressure-sensitive adhesive. When the glass encounters an accidental collision, the glass is broken and covered with a film. Stick firmly and will not easily splash and hurt people.
4. UV blocking performance
The current car film UV blocking rate is generally more than 99%. UV blocking can effectively prevent the fading and aging of the items in the car, and prevent the skin from being burned and tanned.
5. Hand feel and wear resistance
The car film feels thick and smooth, and the surface of the good car film is hardened, and it is not easy to scratch the surface after long-term use. The low-grade film feels thin and brittle, and is easily scratched, making the film surface unclear.
6. The difference between the film for the front windshield and the side windshield glass
The special heat-shielding film for front windshield glass and ordinary side windshield glass film cannot be mixed, and the front windshield film has high definition. The front barrier film with high thermal insulation rate can be used as a side barrier film, but the side barrier film cannot be used as a front barrier film. In order to ensure the quality of the film, it is best to have a professional operation workshop to avoid the impact of dust and other debris on the quality of the film.
7. Color
The car film usually adopts the method of body infiltration and sputtering metal coloring to make the film color, the body infiltrating to make the film color is called natural color film, and the sputtering metal to make the film have a metallic color is called metal film. Films colored by this method are not easy to fade, especially metal films. However, many low-grade and inferior films on the market are mostly colored by the method of viscose coloring, that is, adding pigments to the viscose, and then coating it on the colorless transparent film to make the film colored, which is called dyed film. This kind of film relies on the depth of color to insulate heat, and the heat insulation effect is poor. To distinguish the films of these different coloring methods, just spray some carburetor cleaner on the sticking surface of the film to make it fade. Now there is a kind of interlayer dyed film on the market. It cannot be discolored immediately by spraying with carburetor cleaning agent, but it will fade after a year or a half of sun exposure. There are many such films on the market now, and it is difficult to identify them immediately. Consumers should pay attention.