万润股份：公司布局的高性能聚合物产品聚醚酰亚胺（PEI）材料下游面向挤出、注塑、改性等类型企业

Core Viewpoint - Wanrun Co., Ltd. (002643) is focusing on high-performance polymer products, specifically polyether imide (PEI) materials, targeting downstream applications in extrusion, injection molding, and modification [1] Group 1: Company Focus - The company is engaging with downstream clients in the aerospace composite materials sector [1] - Specific applications of the PEI materials include injection-molded components used in aircraft fluid separation electromagnetic valves [1] - The quality of these products must meet stringent customer quality standards [1]