The necessity of applying protective film on aluminum profiles

The protective film is one kind of film material with a surface protection function, and it is also one of the most important products in pressure-sensitive adhesives (PSA).The protective film is usually made of polyolefin plastic film as the base material and acrylic polymer as the base resin of the pressure- sensitive adhesive, which is processed by a coating machine.

The real meaning of the protective film is a temporary protective measure taken to prevent surface scratches during the storage, transportation and circulation of goods,or between the processing steps of the substrate.The protective film is widely used in the surface protection of aluminum panels,aluminum-plastic composite panels, mirror effect steel plates, color panels, plexiglass panels, decorative panels, aluminum profiles, plastic steel profiles, stainless steel coils,marble materials and display screens.

The protective film for aluminum profile is based on a polyethylene (PE) film with a specific formula, polyacrylic acid (ester) resin is used as the main material of the pressure-sensitive adhesive, and several specific adhesives are coated, slit, and processed in packaging and other processes.The protective film is soft in nature, good in adhesion, easy to stick, and easy to peel

off. The pressure-sensitive adhesive has good stability and will not have any adverse effects on the surface of aluminum profile to be filmed.

The protective film is a layer of plastic film attached to the aluminum. The purpose is to protect the surface of aluminum profiles from damage during a series of processes such as handling, storage, transportation, processing, and installation. After the aluminum profile is installed, the engineering team will tear it off, so that the surface of the aluminum profile is as smooth as new and has the due decorative effect. There are many kinds of aluminum profiles on the market, and the surface treatment technology of aluminum materials is also constantly improving. Various aluminum surface treatment technologies include: mechanical polishing, chemical polishing, anodizing, electrophoretic painting, chemical coloring, fluorocarbon spraying, electrostatic powder spraying, wood grain effect sublimation treatment, etc. Different aluminum profile surfaces need to choose different adhesive protective films. Protective film products generally have 4 series of low viscosity, medium viscosity, high viscosity and ultra-high viscosity; the colors are transparent, milky white, blue, black and white, etc.; protective film. Depending on the surface of the aluminum profile and the pressure of the film, the speed of viscosity rise is also different. In general, before peeling off the protective film, the protective film should be left for enough time to determine whether the viscosity is appropriate. It is important to choose the right adhesive and tacky protective film for a given surface. Further processing steps are key to determining viscosity. Subsequent processing generally includes cutting, bending, drilling, punching, etc. Generally low viscosity protective films are used for smooth surfaces such as mechanically polished and chemically polished aluminum profiles. Medium viscosity protective film for medium rough surfaces such as anodizing, electrophoretic coating, chemical coloring, fluorocarbon spraying, powder coated aluminum profiles, etc. Use a high-viscosity protective film for very rough surfaces, such as electrostatic powder-coated aluminum profiles. If laser cutting is required, an ultra-high viscosity protective film should be used due to thermal shrinkage of the protective film. In addition to viscosity, users also need to test the tensile strength and elongation of the protective film to ensure the flexibility and strength of the protective film can meet the requirements of the application.