【Popular Science on Polymers and Materials】--024 Popular Science on the Materials Used in Car Sunscreens + zdl1966
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This post was last edited by ljtjbx on 2015-11-12 07:59. Car sun protection films are becoming increasingly common. But fish of poor quality are mixed in with good ones. It is made from a PET (polyethylene) substrate, and utilizes multi-layer metal sputtering technology, vacuum technology, ion technology, film physics, and fine chemical engineering techniques to achieve extremely high thermal insulation efficiency, high tensile strength, high elongation strength, and strong resistance to acids and alkalis; moreover, it features natural and rich colors. It is a high-tech, energy-saving and safe polymer material. The benefits are as follows: 1. It blocks ultraviolet rays, capable of blocking 99% of them, which can **reduce fading of indoor furniture and items caused by ultraviolet radiation**. 2. Safe and explosion-proof; it has explosion-proof features that prevent ordinary glass or tempered glass from breaking naturally, thereby avoiding injuries to people and ensuring their safety. 3. With an insulation efficiency of up to 79%, it can effectively block the thermal radiation and heat conduction from solar energy, thereby saving on air conditioning costs. 4. Reduce glare, making it less harsh to look outside from indoors and maintaining eye comfort. 5. It preserves privacy – the interior is not visible from the outside – and features high light transmittance.
These days, almost all cars come with film installed, and it’s hard to tell whether it’s of good quality or not.
Yeah, I’m not sure whether it’s a problem with the quality of the film, the skill of the person who applied it, or improper use； The film that was just applied started to bubble up after a short while, in patches; it’s quite annoying.
Bubbling is most likely due to improper installation; the film I used was purchased from an auto parts market, and it was relatively cheap, costing only a few hundred yuan. It’s been 4 years now, and there are no bubbles yet.
It’s possible that the film wasn’t applied properly; for example, when applying the film in poor weather with high humidity, bubbles are likely to form. There are also issues related to quality, such as the smoothness of the membrane and its adhesion.
Most cars have film applied to them; how can one determine whether it’s of good quality? . . . . . . . . . . . . .