From November 2022 through January 2023, the US shipped more polyethylene (all grades combined) to China than did Iran.

China’s import statistics for both January and February 2023 will not be published until March 20th. Export statistics for the US and Iran, however, are available for January 2023. These show rising exports from the US to China starting around July 2022, and slowing exports from Iran to China from October to December. US volumes to China exceeded Iranian volumes to China as of November.

From International Trader Publications’ World Trade Analyses on all grades of ethylene polymers.