There are many types of protective films, which can be divided into the following types according to their materials. General protective film manufacturers have them. 1. The protective film made of PP material is the first to appear on the market. The chemical name is polypropylene. It does not have any adsorption capacity. It is usually glued with glue. After tearing it off, it will leave a glue mark on the screen, which will corrode the screen for a long time. . Has been basically eliminated. 2. The characteristic of the PVC material protection sticker is that it has a soft texture and is easy to stick, but this material is relatively thick and has poor light transmittance, making the screen look dim. It will also leave glue marks on the screen after tearing off. This material is also easier to turn yellow and oil out with temperature changes, and the service life is relatively short. 3. The improved PVC protective film solves the previous problems of heavy weight and poor light transmission. 4. The PET protective film is the most common type of protective sticker on the market. This three-layer PET protective film is used for mobile phones and tablets. 5. AR material protector is the best known screen protector on the market. 6. The main raw material of PE material is LLDPE, which is relatively soft and has certain stretchability. 7. The protective film made of OPP is relatively close to the PET protective film in appearance. It has higher hardness and certain flame retardancy, but its paste effect is poor, and it is rarely used in the general market. 8. The protective film made of OCA is no different from other materials in appearance, but the protective film made of OCA is produced in Japan. It is now used most on Apple mobile phones, and its brightness and hardness are better than other materials. Good, so OCA is the most popular material for mobile phone protective film.