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PE, whose full name is Polyethylene, is the simplest polymer organic compound and the most widely used polymer material in today's world. PE protection film uses special polyethylene (PE) plastic film as the base material and is divided into high-density polyethylene protection film, medium-density polyethylene, and low-density polyethylene according to different densities.
The biggest advantage of PE protection film is that the protected product is not contaminated, corroded, scratched, or damaged during production, processing, transportation, storage, and use, maintaining the original glossy and bright surface, thereby improving the product's quality and market competitiveness.
PE protection film is widely used, so how to choose a PE protection film becomes a crucial issue. This article will teach you four tips for choosing a PE protection film.
This is difficult to identify with the naked eye, so it is best to use optical instruments for measurement. A simpler method is to cut small pieces of PE protection film and stick them one by one in the middle of the computer desktop. Then, open a new blank WORD document on the computer and observe the brightness (professionally called luminance) of areas with and without the film or different film areas of the blank WORD document. The film that appears the brightest is the one with the best transmittance and is the best protection film.
How to check the haze of the PE protection film? First, turn off the monitor. Follow the same method as above, sticking each protection film one by one. The display screen's color clarity indicates lower haze; the lower the haze, the better the material quality. If you use a black test board, the difference will be more noticeable.
In a slightly dim room, turn on a fluorescent lamp. After removing the upper and lower release films of the PE protection film, hold it between your eyes and the light. Look carefully to see if there is a layer of fog-like substance evenly distributed within the PE protection film. This fog-like substance contributes to haze; the more pronounced it is, the higher the haze and the lower the material quality. Conversely, the less pronounced it is, the better the material quality.
Since LCD monitors are sensitive devices that fear static electricity, the less static electricity, the better when applying the protection film. The testing method involves preparing the PE protection film (either 3-layer or 2-layer), spreading some cigarette ash or tiny paper scraps on a table. Then peel off the top layer of the protection film (this step applies to 3-layer material) and the silicone layer. After peeling off this PE protection film, immediately bring the used layer (silicone side) near the cigarette ash or paper scraps. Observe whether the protection film attracts these substances to its silicone layer. The stronger the attraction, the higher the static electricity generated by the material, indicating poorer quality. Conversely, the lower the static electricity, the better the quality.
Whether the PE protection film is scratch-resistant is currently a major concern. The scratch-resistant materials on the market are generally similar (2-3H) and perform well, with only a distinction between scratch-resistant and non-scratch-resistant. The testing method involves using a 3H hardness pencil, pressing and sliding it at a 45-degree angle with 500G of force on the PE protection film 10 times. If there are no scratches, the film meets the 3H hardness requirement.
Another simple method is to use a slightly hard metal object or freshly clipped fingernails to scrape the PE protection film with the usual pressure of a stylus. If it easily scratches, it is not scratch-resistant. If there are no scratches, it can be confirmed as scratch-resistant.
Following these four tips can help you select the desired PE protection film when purchasing.
