In recent years, China's polystyrene market has experienced significant growth in both production and imports, solidifying its position as one of the world's largest consumers of this material. Since the 1980s, the industry has benefited from the introduction of advanced foreign technology and equipment, leading to continuous development and expansion. Over time, production methods have evolved from the traditional suspension method to more efficient continuous processes, improving efficiency and boosting self-sufficiency rates. By 2004, China had over 30 polystyrene production plants with a combined capacity of 2.35 million tons. Among these, Zhenjiang Chi Mei stood out as the largest producer, with an annual output of 360,000 tons. Other major players included Yangtze BASF (160,000 tons), Shantou Ocean First Polyphenylene Resin Company (135,000 tons), Chevron Phillips Chemicals (110,000 tons), Styron Asia (100,000 tons), Quanzhou Ocean Polyphenyl Resin Company (96,000 tons), Total Petrochemical Sanshui Chemical (85,000 tons), Zhanjiang New Zhongmei Chemical (70,000 tons), Yanshan Petrochemical (52,000 tons), and Guangzhou Petrochemical Plant (46,000 tons). According to official data, China produced 2.298 million tons of polystyrene in 2004, while importing approximately 1.38 million tons. Over the previous five years, imports remained between 1.33 million and 1.6 million tons annually. However, after 2004, import volumes began to decline, and the self-sufficiency rate increased steadily—from 34.8% in 2000 to 60.7% in 2004. Looking ahead, it is projected that China’s polystyrene demand will grow at an average annual rate of around 8%. By 2005, consumption is expected to rise to 4.1 million tons, reaching about 5.9 million tons by 2010. Meanwhile, production capacity is anticipated to increase from 2.85 million tons in 2005 to 3.5 million tons by 2010. Despite this growth, China is still expected to remain the world’s largest importer of polystyrene in the coming years. While production capacity in developed countries has grown slowly, most new global capacity has come from mainland China. For instance, Shanghai Secco launched a 500,000-ton/year styrene and 300,000-ton/year polystyrene plant, supported by a 900,000-ton/year ethylene facility. Similar projects, such as Huizhou Nanhai and Tianjin Petrochemical/Dow Chemical, are also advancing, with plans for additional polystyrene facilities. By 2010, China's polystyrene capacity is expected to reach 3.5 million tons annually, with an output of around 3.15 million tons at 90% utilization. However, the supply of raw materials like styrene remains a challenge. China's styrene production has developed relatively slowly, making the country heavily reliant on imports. Although several large-scale styrene plants are expected to come online by 2006, increasing capacity beyond 3 million tons per year, a supply gap is likely to persist. Additionally, high oil prices continue to pressure production costs, affecting industry profitability. In terms of consumption, electronics and electrical appliances account for nearly 55% of polystyrene use in China. Daily necessities, expandable polystyrene products (such as food containers and packaging), and construction materials also represent a significant share. Given that much of China’s polystyrene demand involves processing imported materials, the consumption structure is expected to remain largely unchanged in the near future. While electronics will continue to dominate, the use of polystyrene in packaging and daily goods is projected to grow rapidly. Despite progress, China’s polystyrene industry still lags behind global leaders in product quality, performance, and production scale. Domestic products are mainly low-end, limiting their use in high-demand sectors like electronics, where imported materials hold a clear advantage. High-end and specialty resins remain underdeveloped, with many specialized applications still relying on imports. To strengthen the industry, China must focus on developing advanced, high-value polystyrene products to meet growing domestic and international demands.

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