The protective film is an important protective material for the surface of PVC plastic profiles, and it is also an indispensable packaging material in the transportation, production and installation of modern energy-saving doors and windows. Its popularization and application can protect the surface of PVC plastic doors and windows from scratches and stains, and remain as smooth as ever.

The printing protective film also plays a role in the promotion of plastic profiles in the industry. In the past fifteen years, the manufacturing technology of PVC profile protective film has been continuously developed, and the formula has also been continuously improved, from the first generation of ordinary 0PP transparent printing film to the second generation of 0PP printing composite aluminized PET film. It is characterized by the use of aluminum-plated layer to increase light barrier performance, and the use of PET film layer to increase the anti-aging performance of the protective film.

Although this kind of 0PP composite aluminized PET protective film has been used for many years, there are always the following problems: 1. In the composite film, due to the different resilience of the two different films, it will cause the protective film to warp after sticking to the profile; 2. Because of PVC A large number of plastic door and window profiles are stacked outdoors. The protective film is strongly irradiated by the sun. The 0PP film will age after two months (in summer), which will make the printing blurred and lost, and the aluminum oxide layer will fall off. After the doors and windows are installed, the protective film is difficult to remove Down; 3. Due to the different melting points of the two films, the composite film cannot be recycled, which does not meet the requirements of environmental protection and sustainable development.