Geopolitical tensions in the Middle East escalated sharply over the weekend, with the Strait of Hormuz reporting zero traffic, driving oil price expectations higher. This cost-side momentum quickly transmitted to the polyester chain, pushing PX, PTA, ethylene glycol, and bottle-grade chip futures up over 3% at Monday's close, with staple fiber rising more than 2%. However, this rebound is not a signal of demand recovery; it is more accurately a passive rally driven by supply contraction and external shocks.
Supply Side: Maintenance Wave and Geopolitical Shock Push PX and PTA Utilization to Lows
PX accounts for over 90% of PTA production costs and is currently in its annual maintenance window. Multiple mega-ton units from Shenghong Refining, Hainan Refining, and Zhejiang Petrochemical have been shut down, involving over 9 million tons of capacity, with monthly output losses of 800,000 to 900,000 tons. PX industry operating rates have fallen to 59.4%, and Asia's overall rate has dropped to 56.6%, both at yearly lows. This means PX supply has entered a tight phase, providing rigid cost support for downstream PTA.
The maintenance scale in the PTA sector is even more striking. Since April, a concentrated maintenance wave has idled or reduced output at over 22 million tons of capacity, more than 20% of China's total. Daily capacity utilization once fell to around 60%, the lowest since October 2021. Even into June and July, the scale of pending maintenance remains large, keeping utilization low. As of early July, domestic PTA social inventory stood at 3.05 million tons, down 1.4 million tons from April's peak, extending a three-month destocking cycle to levels below the past two years.
Demand Side: Off-Season Lingers, Downstream Buyers Stick to Hand-to-Mouth
In stark contrast to the supply-side tightness, the downstream polyester sector is in its traditional off-season. Average weekly capacity utilization for the polyester industry is around 80%, a neutral level, but with clear divergence among filament, staple fiber, and bottle-grade chip. The slight uptick last week came from higher loads at some filament and staple fiber units, offset by a shutdown at Sanfangxiang's staple fiber plant, leaving net gains limited.
More concerning is the weaving sector. Loom operating rates in Jiangsu and Zhejiang remain low, with insufficient orders dampening restocking appetite. Polyester plant processing margins are being squeezed, and downstream buyers maintain a hand-to-mouth strategy, showing no panic buying despite upstream price increases. This means the polyester chain rally lacks fundamental demand support, and once cost-side drivers fade, the risk of rapid price corrections will emerge.
Geopolitical Risk and Maintenance Pace: Two Themes for Q3
The US-Iran conflict currently lacks a buffer for reconciliation, and the Strait of Hormuz disruption will exacerbate global crude supply concerns, limiting refinery restarts. For the polyester chain, external geopolitical risks and internal maintenance schedules form the two core themes for Q3.
From a fundamental perspective, PX and PTA supply-demand balances remain tight in the near term, with destocking likely to continue. However, two variables require close monitoring: first, whether high processing margins will reduce the actual fulfillment rate of PTA maintenance plans; second, the restart progress of idled units. If processing margins widen further, some producers may delay or cancel maintenance, potentially ending the destocking cycle early.