Core Insights - The article highlights the transformation of Shuanghui's chemical packaging industry, showcasing its journey from technology monopoly to independent innovation and global expansion through the development of PVDC sausage casing film [1][2][8] Group 1: Technological Breakthroughs - PVDC sausage casing film is crucial for the production of ham sausages, affecting taste, preservation, and safety, with strict quality standards required for food-grade packaging materials [2][3] - In the 1990s, the technology for high-performance casing film was monopolized by foreign companies, leading to high costs and reliance on imports, which posed challenges for Shuanghui's ham sausage business [2][3] - Shuanghui introduced its first casing film production line in 1996 and established a packaging technology research center, marking the beginning of its journey towards self-sufficiency in this technology [2][3] Group 2: Industry Development - Over 20 years, Shuanghui's chemical packaging industry has established nine production bases across China, becoming the largest PVDC film processing and research base globally, transitioning from technology importation to independent innovation [3][4] - The company has significantly upgraded its production lines through automation and smart technology, resulting in over 50% increase in production capacity and efficiency across various factories [4][6] Group 3: Industry Standards and Sustainability - Shuanghui has developed a comprehensive product research and testing system, holding 143 effective patents and leading the industry in technology standards [6][7] - The company has actively participated in the formulation and revision of national and industry standards, including leading the development of national standards for casing film, promoting industry advancement [6][7] Group 4: Full Industry Chain Development - Shuanghui has built a complete industry chain from PVDC resin synthesis to end-use applications, ensuring raw material supply and seamless integration of production processes [7][8] - The company has expanded into high-value markets such as medical and beverage packaging, achieving a transformation from traditional channels to diverse applications [7][8] - Shuanghui's products, including PVDC casing film and aluminum wire, are exported to over ten countries, with an annual export volume of 5,000 tons, enhancing its international competitiveness [7][8]