More than four years have passed since South Korea first imposed anti-dumping duties on Chinese polyester fully drawn yarn (FDY), and the measure has now reached a critical crossroads. On September 3, 2026, South Korea's Ministry of Economy and Finance (MOEF) issued Notice No. 2026-242, initiating a sunset review of the anti-dumping duties on FDY originating from China. The review will determine whether the duties of 3.95%-10.91%, in effect since January 6, 2022, should continue beyond their January 2027 expiry. For Chinese exporters still shipping chemical filament yarn to South Korea, this is not merely a legal procedure but a strategic game affecting order structures for the next five years.
Background The initiation of this review was not unexpected. As early as June 29, 2026, the Korea Chemical Fibers Association filed a petition with MOEF requesting a sunset review of the duties on Chinese FDY. According to the notice, the dumping investigation period covers January 1 to December 31, 2025, while the injury investigation period extends from January 1, 2021, to December 31, 2025, encompassing five years of comprehensive data. This timeline indicates that South Korean authorities will assess whether Chinese products are likely to re-enter the market at dumped prices and cause material injury to the domestic industry if the duties are removed.
Historically, the trade remedy measure traces back to 2021 when South Korea initiated an anti-dumping investigation on Chinese FDY. On January 6, 2022, MOEF imposed definitive duties of 3.95%-10.91% under Order No. 888, effective for five years. The product falls under Korean HS code 5402.47.9000, covering high-tenacity or regular polyester filament yarn. Notably, the final ruling in this sunset review is expected within six months, but the notice allows for up to four months of extension. This means a decision is anticipated between March and July 2027, with existing duties remaining in force during the review, providing a clear policy buffer for exporters.
Industry Impact For China's chemical fiber industry, the South Korean market, though limited in volume, carries symbolic significance. FDY is a key category of polyester filament, widely used in apparel fabrics, home textiles, and industrial textiles. The review reflects sustained pressure on South Korea's fiber sector from China's low-cost capacity. Since 2021, China's polyester capacity has expanded significantly, enhancing export price competitiveness and triggering defensive petitions from Korean producers. If the review upholds the duties, Chinese exports to South Korea will continue under a high-cost regime, potentially diverting orders to third-country production in Vietnam or Indonesia, or accelerating Chinese companies' overseas expansion in Southeast Asia. Conversely, if duties are removed, short-term export volumes may rebound, but price competition will intensify.
For buyers and traders, policy uncertainty during the review period itself poses risks. Korean importers may adopt a wait-and-see approach, reducing long-term contracts in favor of spot purchases. This requires Chinese exporters to incorporate flexibility into pricing to account for potential tariff and exchange rate fluctuations. Moreover, the injury investigation data covers 2021-2025, a period marked by global supply chain disruptions and volatile shipping costs. The actual operating conditions of Korean producers may have shifted, offering room for Chinese parties to present counterarguments.
Practical Recommendations ### For Buyers - Monitor review progress: Include tariff adjustment clauses in contracts with Korean suppliers before the final ruling to avoid sudden cost spikes. - Diversify sourcing: Evaluate the feasibility of sourcing FDY from other Southeast Asian countries to hedge against potential continued duties. - Leverage the buffer period: Consider increasing inventory before the current measure expires in early 2027 to lock in costs under existing tariffs.
For Exporters - Actively participate: Engage industry associations and specialized legal counsel to respond to the review, aiming for individual or lower duty rates. - Rebalance market structure: Expand into Belt and Road countries and Latin American markets to reduce dependence on a single destination. - Deploy overseas capacity: If the outcome is unfavorable, consider establishing slitting or twisting operations in Southeast Asia to alter the product's origin status.
The clock for the review has started, and the next six months will be critical in determining the fate of Chinese FDY in the Korean market. Regardless of the outcome, this case reminds the industry that trade remedy investigations are a recurring risk for chemical fiber exports. Only by integrating compliance and adaptability into long-term strategy can enterprises navigate international trade disputes with resilience.