The protective film is the most common type of protective sticker on the market. The three-layer PET protective film is used for mobile phones and tablets. The chemical name is polyester film. The characteristic is that the texture is harder and more scratch-resistant, and it will not turn yellow as oily materials for a long time. However, the protective film of PET is generally electrostatically adsorbed, and it is easy to foam and fall off, but it can be reused even if it is washed off in clean water. The price of PET protective film is much more expensive than PVC. It is made of PET material protection and workmanship and packaging. It has a protective sticker specially designed for hot mobile phone models. It can be used directly without cutting.