Metallized films are flexible packaging materials created by depositing an ultra-thin layer of metal, typically aluminum, onto a plastic film substrate in a high-vacuum chamber. This process, known as vacuum metallization, vaporizes the metal source, allowing the metal atoms to condense evenly onto the film's surface, forming a metallic coating only 0.02 to 0.1 microns thick—far thinner than a human hair. The substrate is usually a polyester (PET), polypropylene (PP), or nylon film, chosen for its mechanical and barrier properties. The resulting composite structure combines the inherent strengths of both materials: the film provides durability, flexibility, and a base for sealing, while the microscopically thin metal layer creates a brilliant, reflective finish and, most importantly, dramatically enhances the material's barrier properties against moisture, gases (like oxygen), and light.

These enhanced properties make metallized films a highly efficient and cost-effective solution for extending the shelf life and preserving the quality of…

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