What are the characteristics of PET protective film?

Transmittance: This point is more difficult to identify with the naked eye, and it is better to use an optical instrument to measure; another stupid way is to cut a small piece of each protective film to be selected and place it in the middle of the computer desktop and paste it in sequence, and then open a blank Check the whiteness of the blank WORD file in the area with and without the film or the blank WORD file in the different film area (professional point of view is called brightness). By comparing separately, the brightest material can be selected and its permeability is a better protective film. Static electricity: because the liquid crystal display is a sensitive device that is afraid of static electricity, the smaller the static electricity when the protective film is attached, the better. The test method is to prepare the protective film to be tested (three-layer material or two-layer material), smoke a cigarette and knock the soot in Desktop, or get some small paper scraps on the desktop, then tear off the top layer of the protective film (this step is for the 3 layers), then tear off the protective film with the silicone layer, tear off this layer When the protective film is used, immediately put the used layer (silica gel surface) close to soot or paper scraps to see if the protective film will adsorb these things on the silica gel layer of the protective film, and whether the degree of adsorption is strong. The stronger it is, the higher the static electricity generated by the material, the worse the material, and vice versa. Haze: The haze is mainly to be seen when the monitor is turned off. After the different protective films to be selected are pasted in sequence, the more the screen background color, the smaller the haze. Of course, this material is better. This method It is easier to see the difference if you use a black test board. Another way is to turn on a fluorescent lamp in a slightly darkened room, tear off the protective film from the top and bottom of the release film, and hold it with your hand between your eyes and the light. Look carefully to see if there is a layer of mist for protection. The uniform distribution in the film is the culprit that affects the haze. The more serious the haze, the greater the haze and the worse the material. Otherwise, the better; note that the haze will affect the transmittance rate, but with Transmittance is two different concepts! www.hncypacking.com