With a global production volume reaching 52.1 million metric tons, High-Density Polyethylene (HDPE) remains one of the most widely used polymers in the packaging industry. However, meeting the stringent EU regulations—which mandate a 50% recycling rate by the end of 2025 and introduce rigid safety standards for food-contact materials by 2030—presents a massive technical hurdle. Traditional mechanical recycling often fails to remove deeply embedded volatile organic contaminant