On June 28, 2018, the US International Trade Commission (USITC) made an affirmative final ruling on the anti-dumping industry damage to Fine Deni er Polyester Staple Fiber imported from China, India, South Korea and Taiwan. The products involved in China, India, South Korea and Taiwan pose a substantial damage or damage to the US domestic industry. In the ruling, all four members voted in favor. According to the affirmative ruling of the US International Trade Commission, the US Department of Commerce will issue anti-dumping taxation orders for products imported from China, India, South Korea and Taiwan. This case involves the United States to coordinate the tariff number 5503. 20.0025 under the product.

On May 31, 2017, US companies DAK Americas LLC, Nan Ya Plastics Corporation, America and Auriga Po1ymers Inc. represented the US domestic industry to the US International Trade Commission and the US Department of Commerce, requesting imports from mainland China, India, South Korea, Taiwan and Vietnam's fine-denier polyester staple fiber initiated anti-dumping and countervailing investigations. On June 21, 2017, the US Department of Commerce launched an anti-dumping investigation on fine-denier polyester staple fibers imported from China, India, South Korea, Taiwan, and Vietnam, and initiated counter-subsidy on imported products from China and India. survey. On July 13, 2017, the US Department of Commerce and the US International Trade Commission terminated anti-dumping investigations on Vietnamese products in question as US companies revoked anti-dumping applications against Vietnamese products. On July 14, 2017, the US International Trade Commission made an affirmative preliminary ruling on anti-dumping industrial damage imported from China, India, South Korea and Taiwan, and also imported products from China and India. Affirmative preliminary ruling on countervailing industry damage. On October 31, 2017, the US Department of Commerce issued a notice stating the preliminary anti-subsidy for fine-denier polyester staple fibers imported from China and India. On December 19, 2017, the US Department of Commerce announced an anti-dumping preliminary ruling on fine-denier polyester staple fibers imported from China, India, South Korea and Taiwan. On January 17, 2018, the US Department of Commerce announced a counter-subsidy final ruling on fine-denier polyester staple fibers imported from China and India. On May 24, 2018, the US Department of Commerce issued a notice stating the final anti-dumping of fine-denier polyester staple fibers imported from China, India, South Korea and Taiwan.