Anti-Yellowing Agents for Polyurethane Shoe Materials: Enhancing the Longevity and Aesthetics of Synthetic Leather and Fabrics 📝 Introduction In the ever-evolving world of fashion and footwear, aesthetics are just as important as durability. One of the most persistent challenges faced by manufacturers of polyurethane (PU)-based synthetic leather and fabrics is yellowing—a phenomenon that not only...