金三江：公司的主营业务为沉淀法二氧化硅的研发、生产和销售

Core Viewpoint - The company, Jin Sanjiang, focuses on the research, production, and sales of precipitated silica, primarily used in the toothpaste sector, while also expanding into food, pharmaceuticals, high-end industrial applications, and high-performance tires [2] Group 1: Business Overview - The main business of the company is the development, production, and sales of precipitated silica [2] - The company's products are currently mainly applied in the toothpaste industry, categorized under fine chemical new materials [2] Group 2: Market Expansion - In recent years, the company has been expanding its silica applications into food and pharmaceuticals, high-end industrial sectors (such as PE battery separators and silicone rubber), and high-performance tires [2] - The company produces silica that can be used for battery separators, specifically for PE battery separators [2] Group 3: Strategic Partnerships - The company has established a partnership with Tianjin Daramic LLC, a subsidiary of Daramic LLC, which is a leading global manufacturer and supplier of battery separators [2] - The silica produced for battery separators has passed through Daramic's global certification system [2]