China becomes net olefins exporter as Iran war reshapes trade

The conflict in Iran has upended Asia's petrochemicals supply chains, turning China from the world's largest importer of plastics and olefins into a regional supplier as Southeast Asian buyers scramble for alternatives to disrupted Persian Gulf feedstocks.

China Flips to Net Exporter

China became a net exporter of olefins for the first time in April and May, a shift equivalent to about 10% of global demand, according to ICIS data cited by The Edge Markets. The transformation has been swift: polyethylene net imports collapsed as Chinese producers, sitting on years of accumulated overcapacity, redirected output to buyers across Vietnam, Indonesia, and the broader Southeast Asian market.bloomberg+1

The Middle East accounted for more than 40% of global polyethylene exports in 2025, with total regional shipments reaching 18.7 million tons. When the U.S.-Israeli war with Iran erupted in late February 2026 and effectively shut the Strait of Hormuz to commercial traffic, Asian steam crackers that sourced over 60% of their naphtha feed from the region declared force majeure. Thai firm Rayong Olefins, a unit of Siam Cement Group, was among the first to halt operations.itpweb+2

Overcapacity Becomes an Advantage

China's petrochemical buildout — long seen as a source of margin pressure — proved to be a strategic asset. New polyethylene capacity of over 3 million tonnes came online in China in 2025 and early 2026, and planned polypropylene additions for 2026 alone total 4.55 million tonnes. With domestic demand weak, producers pivoted to exports. China's chemicals and plastics exports hit a record 6.2 million tonnes in May, up 43% year-on-year for the March-to-May period, according to ICIS.icis+1

ICIS projects China could achieve net polypropylene exports of 4 million tonnes for the full year if current trends hold. Bloomberg reported on July 1 that Chinese producers have emerged as "unexpected beneficiaries" of the conflict, with ample inventories and alternative feedstocks enabling them to fill the vacuum left by Gulf suppliers.icis+1

Lasting Structural Shift?

The critical question is whether these new trade channels will outlast the conflict. A draft U.S.-Iran peace deal reported by Bloomberg in mid-June includes provisions allowing Iran to resume oil sales and the lifting of the Strait of Hormuz blockade. ICIS estimated that from June onward, Chinese exports of styrene, methanol, ethylene, and propylene could decline sharply as Middle Eastern supply resumes.youtube+1

Yet analysts caution that full normalization will take months. ICIS projects at least three months for plastic prices to begin returning to pre-war levels once material flows readjust, with complete recovery stretching into 2027. If Chinese producers retain even a fraction of the regional market share gained during the crisis, they will have secured a lasting outlet for capacity that previously weighed on domestic margins.packagingdive+2