Core Viewpoint - Cangzhou Dahua has successfully developed and produced a hundred-ton high-viscosity polycarbonate (PC) material, achieving international advanced technical standards, which fills the product gap in the high-viscosity PC sector within the China National Chemical Corporation system [1] Group 1: Market Demand and Supply - The domestic PC production capacity currently exhibits structural contradictions, with an oversupply of mid-to-low-end general-purpose PC and a significant demand for high-viscosity PC [2] - High-viscosity PC offers superior mechanical properties, fatigue resistance, and lower flow performance, making it particularly suitable for demanding applications in sectors such as aviation, construction decoration, and the automotive industry [2] Group 2: Technological Advancements - In November 2024, Cangzhou Dahua successfully conducted a trial run for a 20% silicon content copolymer PC, solidifying its position as the only domestic enterprise using tubular continuous process technology to produce silicon copolymer PC granules, thus filling a domestic gap [3] Group 3: Material Characteristics - High-viscosity PC plastic has excellent low-temperature impact resistance and synergistic flame-retardant properties, with broad application prospects in fields such as new energy, 5G base stations, electronic components, and medical devices [4] - The distinction between high-viscosity PC and low-viscosity PC lies primarily in their flow characteristics, with high-viscosity PC being easier to flow under certain temperatures and pressures, making it suitable for injection molding of complex shapes [4][5] - High-viscosity PC typically exhibits better toughness and impact resistance, while low-viscosity PC may perform better in heat resistance and mechanical strength, necessitating a choice based on specific application requirements [5]