Polyester Chain Turbulence: The Dual Game of Ethylene Glycol's Tight Supply-Demand and Geopolitical Risks

On July 29, geopolitical tensions reignited as Iran launched missile attacks on U.S. military bases in the Middle East, sending international oil prices surging in electronic trading and lifting the entire polyester chain. Ethylene glycol led gains with an increase of over 2%, closing at 4,936 yuan per ton. This renewed conflict once again places pricing power for polyester raw materials back in the hands of geopolitical sentiment.

Supply Side: The Double Squeeze of Low Operating Rates and Import Disruptions

The core support behind ethylene glycol's resilient rally lies in persistently tight supply. Domestic plant operating rates have languished around 53%, within the low range for the year. This stems from long-term losses for oil-based ethylene glycol producers, forcing refineries to cut runs through maintenance and load reduction. Coal-based producers, while enjoying relatively stable margins, produce only to meet orders and are unwilling to ramp up output.

On the import side, bottlenecks persist. China relies heavily on Middle Eastern sources for ethylene glycol. Transit efficiency through the Strait of Hormuz has declined due to heightened tensions, slowing loading and shipping schedules. Even if passage conditions improve, the 20–25 day shipping cycle means that August arrivals will see no meaningful recovery. This two-way tightening keeps spot supply scarce.

Demand Side: Off-Season Weakness and Cautious Procurement

In contrast to tight supply, downstream textile demand is in its traditional off-season. Widespread high temperatures and rain across China have kept weaving operating rates in Jiangsu and Zhejiang at multi-year lows. With weak end-user orders, mills maintain a hand-to-mouth procurement strategy, lacking the appetite for large-scale restocking. This demand-side softness prevents polyester chain products from fully absorbing raw material price increases.

Geopolitics: Short-Term Core Variable and Long-Term Uncertainty

In the near term, geopolitics remains the most critical variable for the polyester chain. Any escalation in the Middle East quickly pushes oil prices higher, lifting sentiment across energy and chemical futures. However, the sustainability of such geopolitical-driven rallies depends on conflict evolution. A rapid de-escalation could see oil prices retreat, testing ethylene glycol's independent strength.

Practical Recommendations

For Buyers - Beware of inflated prices driven by geopolitical premiums; avoid concentrated restocking during emotional peaks. Use phased procurement to smooth costs. - Monitor coal-based ethylene glycol plant run rates; improved margins could trigger higher output and ease supply tightness. - Plan ahead for September import arrivals and use futures tools to lock in forward prices.

For Foreign Trade Companies - Allow longer lead times for Middle East route cargoes and assess shipping insurance and delay risks. - Track the sustainability of Houthi maritime blockades against Saudi Arabia, which could further tighten global ethylene glycol supply. - Maintain close communication with downstream clients and incorporate geopolitical risk clauses into new contracts to avoid defaults from price volatility.