The polyester chain saw broad declines this week as cost-side support weakened. PTA futures fell over 2% to close at 5,560 yuan per ton, while ethylene glycol held relatively firm. The downturn was driven not by a sudden shift in industrial fundamentals but by a technical pullback in international oil prices as geopolitical speculation cooled.
Cost and Geopolitical Risks
Crude oil prices weakened recently amid expectations of eased U.S.-Iran tensions, with concerns over Strait of Hormuz passage disruptions easing. Earlier, news of Iran tightening strait controls and the breakdown of the U.S.-Iran ceasefire had pushed oil prices higher, boosting sentiment in the polyester chain. But as speculative fervor faded, cost-side support weakened significantly.
China Customs data shows that PX accounts for over 90% of PTA production costs, making its price fluctuations directly impact PTA pricing. The PX sector is currently in its annual maintenance window, with multiple million-ton plants—including Shenghong Refining, Hainan Refining, and Zhejiang Petrochemical—shut down, affecting over 9 million tons of capacity and reducing monthly output by 800,000-900,000 tons. PX operating rates have fallen to 59.4%, while Asia's overall rate has dropped to 56.6%, a year-to-date low. This means even if oil prices stabilize short-term, tight PX supply will support the floor for PTA costs.
Supply-Side Maintenance and Inventory Changes
The PTA side is even more extreme. Since April, the domestic PTA industry has launched an unprecedented wave of concentrated maintenance, with shutdowns and rate cuts affecting over 22 million tons of capacity—more than 20% of total domestic capacity. PTA daily capacity utilization once fell to around 60%, the lowest since October 2021. Large-scale maintenance is still scheduled for June-July, and utilization is expected to stay low.
As of early July, domestic PTA social inventory had fallen to 3.05 million tons, a cumulative destocking of 1.4 million tons from the April peak over three consecutive months. This absolute inventory level is below that of the same period in the past two years. However, two factors bear watching: whether actual maintenance compliance declines once processing margins recover to high levels, and the restart pace of already-shut units. If margins continue to rise, some plants may delay maintenance or restart early, altering supply dynamics.
Demand-Side Recovery and Seasonal Restocking
Demand has not yet entered the traditional peak season, but recovery expectations are materializing. The polyester industry's comprehensive operating rate stands at 80%, low for the period. Downstream yarn and fabric mills hold raw material inventories near three-year lows, meaning restocking elasticity is high once orders start.
Starting in August, with the arrival of autumn-winter order season, mills will be forced to restock, likely lifting polyester operating rates. Although overseas textile and apparel demand remains weak overall, domestic seasonal restocking can absorb marginal supply increases, preventing a rapid shift to a loose supply-demand balance.
For buyers, current PTA spot prices oscillate in the 5,770-5,860 yuan/ton range, fluctuating with costs in the short term. However, given tight supply on both the PX and PTA sides, coupled with downstream restocking expectations, the Q3 price center is likely higher than current levels.