The polyester chain has recently experienced a price recovery driven by supply-side factors, but the divergence between upstream and downstream is intensifying. Upstream PX, PTA, and MEG lead the gains, while downstream weaving remains mired in the traditional off-season, setting the stage for a tug-of-war rather than a sustained rally in July.
Supply Contraction: Cost Push from Plant Maintenance
PX is the engine of this rally. Industry data shows that Shenghong's 4-million-ton-per-year PX unit has been fully shut down for about 45 days, while Hainan Refining & Chemical has cut production on a 660,000-ton line for three months. These concentrated outages are expected to push the domestic PX operating rate below 60%, an all-time low, providing strong support for PX prices and transmitting costs downstream.
The PTA sector is also undergoing a major maintenance wave. Since April, total capacity involved in shutdowns has exceeded 22 million tons, or over 20% of national capacity, with the daily operating rate briefly falling to around 60%, the lowest since October 2021. Maintenance plans remain dense through June and July, making a near-term recovery unlikely. However, if PTA processing margins continue to rise, some plants may delay maintenance, a variable that will directly affect supply release.
MEG's supply picture is more nuanced. Domestic coal-chemical and refining units are in concentrated maintenance, reducing local output and supporting prices. But import pressure is building: May imports were around 200,000 tons, similar levels in June and July, and are projected to double to 400,000 tons in August. This means MEG's supply tightness will ease in H2, capping upside.
Demand Side: Off-Season Pressure on Industrial Clusters
In stark contrast to upstream supply cuts, downstream demand is weak. July is the traditional off-season for polyester downstream, with no major catalysts. Weaving data is telling: average operating rates for Jiangsu-Zhejiang mills in June were 52.4%, up only 1 percentage point month-on-month but down 8 points year-on-year. Key clusters like Shengze and Keqiao report some improvement in autumn/winter fleece fabric orders, but bulk orders remain scarce, and mills are reluctant to raise operating rates or build inventories.
This supply-demand divergence is impeding price transmission. Upstream raw material prices are rising, but polyester finished products are not keeping pace, squeezing margins for polyester plants. Operating rates are likely to remain low as mills face higher costs and weak orders. Market attention remains on upstream plant maintenance and restart dynamics rather than spontaneous demand recovery.
Outlook: Near-Term Strength vs. Mid-Term Uncertainty
In summary, the core theme for July is the tug-of-war between supply-driven upstream strength and demand-driven downstream weakness. PX and PTA are likely to remain firm in the near term on maintenance support, while MEG gains are capped by rising imports.
Whether the rally becomes sustainable hinges on the pace of downstream order recovery. If new orders pick up in August, higher downstream operating rates will absorb upstream supply, creating positive feedback. If demand stays weak, the supply contraction logic will be gradually priced in, limiting further upside. Crude oil volatility, maintenance execution, and restart schedules remain key variables.