Introduction When global manufacturers search for a functional additives supplier in China, the requirement is rarely limited to one individual product. Modern polymer, coating, film, photovoltaic, battery, semiconductor and fiber applications often require multiple properties to be improved simultaneously—from hydrolysis resistance and weatherability to crosslinking, antimicrobial performance, dispersion and long-term material stability. Founded in 2010, Shanghai Langyi Functional Materials Co., Ltd. focuses on specialty functional additive solutions and provides functional differentiation services across multiple industrial value chains. The company integrates R&D, manufacturing and sales, supported by operations in Shanghai and Shandong. While international customers may already know LANGYI for technologies