How to choose protective film for Tablet PC ?

The screen of electronic products will inevitably damage the screen in daily life. However, some people also said that there is no need for film on mobile phones and tablets. Because of good quality products, the screen has been processed and the pressure resistance is high. If it is not a good product, it is even less necessary for the film to be replaced. So, does the screen need to be filmed?


First of all, to understand the touch screen's scratch resistance, on the touch screen, its material is a piece of glass, but the glass of different materials, the hardness will be different, there is a certain difference between scratch resistance. German mineralogist Frederich Mohs divides the hardness of minerals into ten grades, ranging from 1 to 10 to graphite, gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum, and diamond. Among them, the lowest hardness is graphite, and the highest hardness is diamond. The main component of pure glass is silicon dioxide, which is quartz, and the hardness is 7. However, the touch screen must take into consideration various requirements such as volume, weight, tactile sensation, and light transmission, so its hardness is about 6-7.

  In daily life, the finger that is most often in contact with the screen, its nail hardness is less than 3, will not have any effect on the screen. The hardness of many metals is 5.5, so the glass that is most likely to rub against the screen in the bag has little effect on the screen.


  Looking at the types of touchscreen glasses at a glance, when we choose tablets and mobile phones, the screen usually becomes an important selection factor. In addition to the screen resolution, density, and color, the screen protection glass is also very important. The types of screen glass that we can reach are also varied. Taking the most popular capacitive touch screen as an example, its structure is glass, conductor layer, glass, and the glass layer has a protective effect on the conductor layer and the sensor.

1, Flexible glass


Plexiglass, commonly known as acrylic, is cheaper and has a much lower wear resistance than traditional glass. The hardness of plexiglass is generally 3-4, and even after surface hardening, the hardness is 5-6. When in contact with metal, it is naturally in a weak position, so the screen is more likely to be left with scratches. The advantage is that the toughness is better than the glass material and it is not easy to crack.

2, aluminosilicate glass

The ordinary touch screen glass has a hardness of 6, and in order to improve the scratch resistance of the screen, aluminosilicate glass is used in touch screen technology. This touch glass material is more difficult to process and more expensive, with a hardness of 6.5-7.5, which is higher than that of organic glass and ordinary touch screen glass. Aluminosilicate glass is generally not scratched, but the disadvantage is that it is more brittle and heavier than organic glass.

3, sapphire glass

Sapphire glass, which is second only to diamond in hardness, is more wear-resistant and scratch-resistant. This material is usually used on the glass of the camera and will be used in smart phones in the future. The cost of sapphire glass will be 6 to 7 times that of traditional glass, but the hardness is 9, the hardness is very high, and the anti-scratch effect is better. It is reported that this glass touch also has a sensitive touch, as well as a good display.

How to choose a protective film

There are a wide variety of touch screen protective films on the market, including high-penetration films, frosted films, diamond films, tempered films, and the like, and prices range from a few blocks to a hundred dollars. Deep into the protective film material, but also PVC, PET, AR, PE and other different types. With such a big difference, of course, the protective film scratch resistance ability will also be different.

1,PET material protective film

This is the most common type of protection sticker on the market. The PET material has a high hardness and a high scratch resistance. The protective film of PET relies on electrostatic adsorption, and it is easier to foam and fall off, but even if it is peeled off and washed in clean water, it can be reused.

2, tempered glass protective film

Tempered glass film is a new type of screen protection material. According to reports, this protective film has a high degree of protection and its thickness is only 0.4 mm. The light transmission rate is as high as 98%, and its main functions are explosion-proof, anti-blue light, and anti-myopia. To prevent the screen from being damaged by external forces, it also increases the impact absorption, which is 5 times higher than the standard of PET film.

About the selection of protective film, in addition to the material, often from the perspective of light transmittance and wear resistance. However, most low-quality films on the market generally have a transmittance of less than 80%, which seriously affects the display effect of the screen. When it comes to the wear resistance H, the higher the intensity of the hardening treatment, the more likely rainbow patterns appear on the screen. influential. There is a phenomenon that everyone feels the same. When we tear the protective film, we often feel that the screen is clearer and brighter.