Affected by various factors, imports have decreased significantly, and exports have increased. China's three major synthetic materials have narrowed their foreign trade deficits.

In the first half of 2005, China's petrochemical sector experienced a complex landscape shaped by domestic macro-control measures, rising international oil prices, and evolving trade dynamics. Domestic users struggled to absorb high-priced imported products, while trade tensions limited some demand. However, increased domestic production capacity in synthetic resins, synthetic fibers, and synthetic rubber led to a significant rise in imports of these materials, although export growth helped narrow the import-export deficit. The import volume of synthetic resins declined notably during the period, primarily due to high international oil prices that kept polyolefin prices elevated. At the same time, new and expanded domestic facilities for polyolefins, especially polypropylene and PVC, began operating, reducing reliance on imports. Total synthetic resin imports fell by 14.4% year-on-year to 8.973 million tons, but import value rose by 11.7%. The five general-purpose resins saw a drop in imports from a 10.3% increase in 2004 to a 3.8% decline, with most types falling sharply—particularly polystyrene and low-density polyethylene, which dropped by over 15%. Prices for most general-purpose resins remained high, driven by oil price fluctuations, except for PVC, which was less affected due to its calcium carbide-based production method. As a result, import unit prices for polyethylene and polypropylene rose by more than 20% compared to the same period in 2004. Meanwhile, exports of certain resin products increased, particularly as domestic production of household appliances and IT goods surged, boosting demand for polypropylene and ABS. Synthetic fiber imports also declined significantly, despite a 5.3% increase in domestic output and slight growth in apparent consumption. A total of 712,000 tons were imported, down 19% from the previous year. Filament and staple fiber imports fell by 22.3% and 16.8%, respectively. Polyester remained the dominant import, though its share dropped slightly to 46.1%. Imports of polyester fell by 28.8%, mainly due to higher domestic supply and rising import costs. However, demand for nylon and acrylic staple fibers outpaced domestic production, leading to increased imports. On the export side, synthetic fiber exports rose sharply, reaching 276,000 tons in the first half of 2005—an increase of 111,000 tons. Polyester and nylon exports grew rapidly, with polyester staple fiber seeing a notable rise. This marked a shift in China’s role in the global synthetic fiber market. Synthetic rubber imports hit a record low for the period, with a 6.5% year-on-year decline to 520,000 tons. Slower growth in the automotive industry and trade friction in the tire sector impacted downstream demand. Despite a 7.7% growth in domestic synthetic rubber production, it lagged behind the previous year's pace. Import prices soared, with an average increase of 32.7%, and total import value rose by 24.1%. Styrene-butadiene rubber imports fell by 15.1%, but their value and price still increased significantly. Other rubber types, such as butyl and neoprene, continued to rely heavily on imports, though growth slowed compared to 2004. Overall, the first half of 2005 reflected a mix of challenges and opportunities for China’s petrochemical industry, shaped by global economic conditions, domestic policy, and evolving trade relationships.

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