How to buy a good composite packaging film

The previous article introduced several packaging films. The application scope of packaging films of different materials is different. Today I will introduce composite packaging films to you. It refers to a packaging film formed by a multilayer film through printing and lamination processes. How to buy a good composite packaging film? Here is an introduction: 　　 One, look at the flatness of the entire roll of composite packaging film, the flatter the film, the better the quality.　　 2. Check the number of joints and check the continuity of the film. Each roll of joints should be less than one. If there are too many joints, the quality of the composite packaging film is not high.　　 3. The friction coefficient of the inspection film should be within 0.3, and the overprint error should be within plus or minus 0.2 mm.　　 Fourth, smell, the packaging film should have no peculiar smell, no adhesive residue.　　 In addition, friends can also observe the packaging of the composite packaging film to see if there are pallets, corner protectors and the like. Good companies usually pack them in cartons, and they are clean and tidy. If you want to know more about packaging film, please pay attention to this website. Previous: Pof shrink film manufacturers analyze the method to judge the quality of shrink film