1、 The PE protective film falls off in the process of use. The most likely reason for this problem is that the sensitive glue viscosity of the protective film is not enough; Or the pressure of the die press used by the user when pasting the film is not enough; It is also possible that the profile surface is not clean, etc. Because there are many causes, we must find a way to solve the problem after determining the cause, whether it is to replace the sensitive adhesive, increase the film pressure, or effectively clean the product surface. 2、 Although the protective film has not fallen off after being used for a period of time, its two ends have been tilted up. It is likely that it is stretched to a large extent during the pasting process, and there will be unnecessary retraction in the high-temperature environment after pasting. This also reminds us that we should pay attention to the impact of environmental temperature difference on the use of PE protective film in the production process. 3、 There is also the problem that it is difficult to peel off the protective film. There are two possibilities. One is that the sensitive adhesive used in the protective film product is not the special sensitive adhesive for the protective film, and the other is that the material used in the protective film master belt is too soft to bear the tensile force during peeling, resulting in fracture during peeling. At present, there is no particularly good solution.