Practical function of OPP aluminized film. Aluminized film is a composite flexible packaging material formed by plating a layer of metal aluminum on the surface of a plastic film. The commonly used processing method is vacuum aluminum plating, which is in a high vacuum state. The metal aluminum is melted and evaporated at a high temperature, so that the aluminum vapor is deposited and accumulated on the surface of the plastic film, so that the surface of the plastic film has a metallic luster. Because it has both the characteristics of plastic film and metal, it is a cheap and beautiful packaging material with excellent performance and strong practicability.
The function of aluminum plating on the surface of the film is to shading, which not only extends the shelf life of the contents, but also improves the brightness of the film. It replaces the aluminum foil to a certain extent. It also has low price, beautiful appearance and better barrier properties. Therefore, the aluminum film is in The application of composite packaging is very wide, currently mainly used in the packaging of dry and puffed food such as biscuits, and the outer packaging of some medicines and cosmetics.