A novel method for high-volume manufacturing of self-protective plastic surfaces to ensure durable anti-counterfeiting functionality

This study presents a novel approach to the high-volume manufacturing of durable self-protective polypropylene surfaces that integrate micro-scale protective grids with sub-micrometer Laser-Induced Periodic Surface Structures (LIPSS). Grids with variable pitches (40–250 μm) were designed to optimize surface durability and nanostructure functionality. Wear tests indicated that smaller grid pitches offered superior protection, significantly enhancing the functional lifespan of the structural color compared to unprotected surfaces. These findings underscore the success of optimized grid designs in delaying wear progression, providing a scalable and practical solution for durable nanostructured thermoplastic surfaces in industrial applications.