Vacuum Insulation Wrapping Film That Resists Bending Barrier Loss

The patent applies parameter changes by precisely controlling the thickness of the metal aluminum film (5-50 nm) and optimizing the vapor deposition conditions (temperature, pressure, deposition rate) to achieve the desired crystal orientation. By adjusting these parameters, the film achieves high (111) orientation which provides excellent resistance to bending-induced degradation while maintaining effective water vapor barrier properties.

The patent creates a composite structure by forming a metal aluminum film on a base material (such as polyethylene terephthalate or polypropylene). This composite combines the gas barrier properties of the metal aluminum film with the mechanical strength and flexibility of the polymer base material, resulting in a packaging material that maintains water vapor barrier properties even when bent.

The patent optimizes the film thickness parameter to a specific range (5-50 nm) that balances gas barrier performance with manufacturing feasibility and film flexibility. Additionally, by controlling the vapor deposition parameters (temperature, pressure, deposition rate), the patent achieves high crystal orientation that enhances barrier properties without requiring excessive thickness, thereby reducing cost and maintaining flexibility.

The patent applies local quality by creating a thin metal aluminum film with specific crystal orientation characteristics rather than using a thick uniformly random film. The high (111) orientation provides enhanced barrier properties in the direction perpendicular to the film surface, achieving effective gas barrier performance with minimal thickness and reduced brittleness.