The PE protective film and the protected product are not firmly adhered, and appear to fall off during transportation and use. The reason for this problem is exactly the opposite of the previous problem. The biggest possibility is that the protective film product is in production. The viscosity of the pressure sensitive adhesive used is not enough. There is also a possibility that the pressure of the molding machine used by the user when the mold is being applied is not enough, or the surface of the profile is not clean, dust or paint, etc., which affects the sensitive adhesive. Paste effect! If this problem occurs, it is necessary to aim at the cause, the right medicine, replace the sensitive glue to increase the film pressure, or pay attention to the effective cleaning of the surface of the profile when the film is applied to avoid such problems.