China Polypropylene Prices Surge 47% as Plant Maintenance and Hormuz Crisis Tighten Supply

Domestic polypropylene (PP) prices in China have nearly doubled in just three months, reflecting one of the sharpest commodity price swings the country has experienced in 2026. Draw-grade PP (L5E89) in Shandong province, the national pricing benchmark, climbed from 6,690 yuan per ton on 25 February to 9,856.67 yuan per ton on 26 May 2026, representing a cumulative gain of 47.33%.

The upward trajectory unfolded in three distinct phases. In late February and early March, prices broke through 7,800 yuan per ton, posting an initial gain of more than 16%. By mid-March, the benchmark surged past 8,900 yuan per ton, bringing the cumulative rise to 33.68% in roughly three weeks. After a temporary pause in April and the first half of May, the market reignited in late May with another sharp leg upward, driving prices to a new high for the period.

Behind this dramatic move lies a structural supply squeeze. The domestic PP industry operating rate remains near historic lows due to a wave of concentrated unit maintenance and load reductions clustered in May 2026. Propane dehydrogenation (PDH) plants and Sinopec facilities across East and South China are running below 60% of nameplate capacity, primarily because of feedstock constraints. In North China, several large units including Sinopec-Sabic Tianjin Petrochemical and Sinopec Ineos have been shut down simultaneously, removing significant tonnage from the market and widening the regional supply gap.

The feedstock shortage stems largely from the closure of the Strait of Hormuz, which has halted naphtha, LPG and propane flows from Middle Eastern exporters since the Iran-US conflict escalated in late February 2026. Approximately 30% of China's polypropylene output is produced via PDH technology, which relies heavily on imported propane. With Middle Eastern flows interrupted and US propane already restricted by ongoing tariff disputes, PDH operators have been forced to slash run rates or idle units entirely.

Market analysts expect the tight supply pattern to persist through June 2026. While a handful of short-cycle maintenance turnarounds are scheduled to complete around the end of May, most large units undergoing scheduled overhauls require longer downtime windows. Domestic PP supply is therefore unlikely to recover meaningfully before the second half of June, keeping the market structurally short.

The Shandong draw-grade PP benchmark is expected to maintain elevated levels in the short term, with traders watching three variables closely: the pace of unit restarts, the evolution of feedstock supplies from alternative origins such as Russia and Africa, and the strength of downstream demand once the seasonal lull ends. Any further disruption to Middle Eastern feedstock corridors would extend the bull cycle, while a faster than expected restart of idled capacity could trigger a corrective phase.

For a global plastics industry already grappling with rerouted shipping, higher freight costs and depleted inventories, the Chinese PP price spike adds another layer of pressure on packaging, automotive components, household goods and industrial textile supply chains worldwide. China accounts for roughly half of global PP capacity, and sustained tightness in the domestic market is already redirecting export flows and lifting reference prices across Northeast Asia, Southeast Asia and India.