Vacuum Metalized Polyethylene Film (VMPE) stands as a quintessential example of performance breakthroughs in the packaging industry through interdisciplinary technological integration. This material utilizes polyethylene (PE) film as a flexible substrate and employs vacuum metallization—a precision processing technique originating from semiconductor coating technology—to construct composite structures at the molecular scale. Specifically, its manufacturing process involves the following key steps: First, aluminum wires with a purity of 99.9% are placed in a vacuum chamber (with a pressure as low as 10⁻³–10⁻⁴ pascals). Through resistance heating or electron beam bombardment, the aluminum is sublimated into aluminum vapor. These gaseous aluminum atoms migrate directionally at speeds of hundreds of meters per second and are uniformly deposited on the surface of a PE film maintained at 50–80°C, forming an amorphous metallic coating only 50–100 nanometers thick (approximately 200–400 times the diameter of a DNA double helix). During this process, aluminum atoms physically bond with PE molecular chains via van der Waals forces, while some aluminum atoms penetrate to a depth of 10–20 nanometers into the substrate surface, creating a gradient interface layer that ensures the coating adhesion reaches 5–8 Newtons per centimeter (ASTM D3359 standard).