Stick on the film to avoid being cheated. Please be careful not to have a fundamental understanding of membrane products. At present, the best film is vacuum magnetron sputtering film, and Huagai is at the same level as Gu Wei Top Film and Longshen Top Film. Johnson & Johnson (not from Johnson & Johnson Group in China, but with the same name) and Ray-Ban are both junk films such as dyed films or heat-absorbing films. If it is your own car, it is a good choice. The key is another problem. Some people use fake films as brands of good films to operate.
Common features of junk movies are:
1. Uncover the protective layer of garbage film, and you can smell pungent smell. Some garbage films have severe pungent temperature.
2. It is effective at first, but after a long time, it can't be well insulated and protected from ultraviolet rays. (The garbage film only adds a small amount of heat insulation chemicals and anti-ultraviolet chemicals to the adhesive. If it is used for a long time or the heat is too high, it will soon emit or react chemically and lose its original function. )
3. The garbage film is easy to fade, crack and bubble during use.
The actual harm of junk movies;
1. Adhesive is added to the garbage film, which contains high-risk substances such as formaldehyde and benzene, which are easily volatilized after being decomposed by sunlight, damaging the health of the owner or the owner.
2. The definition of garbage pieces is not enough, and there are fog blocks. The garbage truck film is easy to make the driver's eyes tired, or blind spots appear, causing accidents and personal and property losses. The garbage building film causes the owner's glass window to look blurred, which affects comfort and mood.
3. When the garbage automobile film is hit by external force, the glass cannot be firmly stuck, and the broken glass hurts passengers. At present, according to the investigation, the result of such glass damage accounts for more than 80% in the accident. When the owner breaks the glass from the inside to escape, the garbage film can become a "roadblock" to block the escape route of the people in the car, while the garbage building film cannot firmly grasp the glass in the accident, which is very dangerous.
How to identify whether it is a piece of garbage;
1, touch by hand. High-quality film feels thick and smooth, while inferior film is soft and thin, lacking sufficient toughness and easy to wrinkle.
2, nose smell. Pressure-sensitive adhesive is usually used for inferior films, containing a large number of benzaldehyde molecules, which will volatilize in the sun to produce odor, while the special heat-insulating film installation adhesive has almost no taste.
3. Look. High-quality explosion-proof film has high definition, good color depth perspective performance, and uneven color of inferior film.
4. Quality assurance card. Only the warranty card issued by the manufacturer is the real mark of the original film. Please remember that at present, only eight manufacturers such as Bekaert (USA), the manufacturer of Shaanxi Master Film Industry, have passed the certification of the International Window Film Association. Therefore, the real film has a corresponding warranty period. When consumers choose, they must not choose not to guarantee because they are greedy for cheap, otherwise it will be difficult to defend their rights once problems arise.
5. Wipe with chemical reagents such as alcohol, gasoline and asphalt cleaner. Because the garbage film is only dyed by the adhesive layer, or only coated with a layer of ultraviolet shielding agent, the fading phenomenon can be seen by wiping the adhesive layer after removing the protective layer of the film, or it can be found that the ultraviolet rays are greatly reduced by instrument testing.
6. Technical parameters. Visible light transmittance, heat insulation rate and ultraviolet blocking rate are professional terms commonly used by manufacturers to reflect the performance of films. The relationship between them is usually: the more transparent the film, the lower the heat insulation; The stronger the reflectivity of the film, the higher the heat insulation. Consumers can measure with storefront instruments to see if they are close to the nominal technical parameters.
7. Scratch prevention. High-quality car film will not appear scratches and moire on the surface when the window rises and falls normally, while garbage car film has obvious defects in this respect.
8. Does the packaging and information of the products sold have the detailed product model, address, telephone number, website and barcode of the original manufacturer? In addition, it depends on whether the original unified publicity logo is used. Only authorized dealers can use all the publicity logos of the original factory, otherwise they will be investigated for tort liability. It also depends on whether there is a valid authorization to issue certificates.
The fourth generation vacuum magnetron sputtering technology, which appeared in the late 1990s, has been perfected after many technological innovations. Magnetron sputtering technology uses the most advanced multi-cavity high-speed rotating equipment, advanced aerospace alloy materials such as nickel, silver, titanium, gold and ceramic materials, and uses the principle of electric field and magnetic field to sputter metal particles evenly on high-tension PET substrate at high speed and high intensity. The products of magnetron sputtering process not only have good metal texture and stable heat insulation performance, but also have transparency, low reflectivity and lasting color that other processes can not achieve. Metal magnetron sputtering has the characteristics of high definition, high heat insulation, low reflection and no dyeing, and is the highest technology of glass film at present.
Only some top-level films are the products of this process, including single layer, 4 layers, 5 layers, 7 layers, 1 1 layer, etc. The more layers, the higher the price, the more stable the performance, the better the effect and the longer the service life. Market situation: The brands include: Master Series Membrane, Opus, Tianmu, Dragon Film Top Film, Gu Wei Top Film, Quantum Top Film, etc.
The third generation vacuum thermal evaporation process This film was produced in the early 1990s. Vacuum thermal evaporation process is to evaporate aluminum layer on the substrate to achieve heat insulation effect. This kind of film has entered the field of what we usually call metal film. It has lasting heat insulation, but its weakness lies in its low definition, which affects the comfort of the field of vision. Another outstanding weakness is its high reflection.
This kind of film has obvious reflective effect, and the aluminized film is an obvious representative. They and dyed films occupy the largest share of the market. Market situation: The brands are 3M, Ray-Ban, Johnson & Johnson, Yuma Film, etc.
The second generation dyeing process, also known as heat absorbing film, came into being in the 1960s. At present, most of the films on the market are deep dyeing process. Heat absorber is added to the film to absorb the infrared rays of the sun and achieve the purpose of heat insulation. Because it also absorbs visible light, the visible light transmittance is not enough, and the dyeing process itself is limited, so the definition is poor. In addition to poor definition, another weakness of this film is that its heat insulation function decays quickly and it is easy to fade. After a period of time (maybe half a year or a year), the film will fade, no longer be insulated, and will bubble, which will seriously affect visual perception. This kind of membrane is especially suitable for instantaneous heat insulation test (4S stores often use this feature to fool customers)
The naked eye can see different colors, such as red, blue, green and yellow. They and aluminized films occupy the largest market share. Market situation: The brands are 3A, Ray-Ban, Johnson & Johnson, etc.
The first generation of coating and laminating technology is the early sun paper, commonly known as tea paper. This kind of film was made in 1930s, and its main function was to block the strong sunlight. This film basically has no heat insulation function and is only used for shading. Like sunglasses, it only changes the visual light perception, and the surface of sunglasses is also very hot. Therefore, this kind of products have poor heat insulation and poor clarity.
Market situation: the product has been eliminated!
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