The US Department of Commerce (USDC) has announced affirmative final determinations in the antidumping duty (AD) investigations of imports of low melt polyester staple fibre (PSF) from two countries. USDC determined that exporters from South Korea and Taiwan sold low melt PSF at dumping margins ranging from 0–16.27 per cent and 49.93 per cent, respectively. As a result of this decision, USDC will instruct US Customs and Border Protection (USCBP) to collect cash deposits from importers of low melt PSF from South Korea and Taiwan based on the final rates, as appropriate. In 2017, US imports of low melt PSF from South Korea and Taiwan were valued at an estimated $75.5 mn and $26.9 mn, respectively. The petitions were filed by Nan Ya Plastics Corporation, America (SC). Meanwhile, the US International Trade Commission (ITC) is conducting investigations to determine whether or not the domestic industry is materially injured, or threatened with material injury, by imports of low melt PSF from Korea and Taiwan. The ITC is currently scheduled to make its final injury determinations on or before August 1, 2018. If the ITC makes affirmative final injury determinations, USDC will issue AD orders. If the ITC makes negative final determinations of injury, the investigations will be terminated, and no orders will be issued.