In the flexible packaging industry, vacuum aluminized films serve as a cost-effective, high-performance alternative to traditional aluminum foil composites. However, the thickness of the aluminized layer is a critical variable that determines the material s ultimate barrier efficiency. This study evaluates the effect of coating thickness on the moisture resistance of Vacuum Metallized Biaxially Oriented Polypropylene (VMBOPP) by measuring the Water Vapor Transmission Rate (WVTR). Utilizing the advanced Labthink C303H Water Vapor Transmission Rate Test System, researchers analyzed two VMBOPPsamples with different coating densities to provide a technical reference for quality control and material optimization. Continue reading