The polyester industrial chain has recently experienced a strong cost-driven rally: PTA futures broke above 6,000 yuan per ton, spot prices followed suit, and polyester filament quotes rose accordingly. However, in contrast to the heat in raw materials, downstream weaving mills have not shown enthusiasm to purchase, resulting in a tug-of-war pattern of "upstream price hikes, downstream wait-and-see."
Supply contraction is the core driver of this round of price increases
The direct impetus for PTA price gains comes from significant supply contraction. Since Q2, multiple large PTA units have entered annual maintenance, coupled with a phased shortage of PX feedstock, pushing industry operating rates down to below 60%, the lowest in nearly a decade. Low operating rates directly led to months of destocking in social inventories, tightened spot supply, strengthened basis, and elevated spot premiums, laying a fundamental foundation for price increases.
Meanwhile, the capacity cycle inflection point has emerged: no new PTA capacity has been added domestically this year, easing long-term supply expansion pressure and reinforcing medium- to long-term bullish expectations. International crude oil prices have risen amid geopolitical disturbances to energy transport routes, pushing up PX costs and transmitting upward cost pressure down the chain, raising production costs for polyester enterprises and strengthening their willingness to raise prices.
Transmission obstacles: filament gains lag, profit distribution conflicts highlight
Theoretically, PTA accounts for over 60% of polyester filament production costs, so raw material increases should drive filament prices up in tandem. However, spot market performance shows that filament factories have raised quotes, and some specifications saw short-term sales improvement, but price transmission is not smooth. Weaving mills, facing rapidly rising raw material prices, show weak willingness to chase highs, generally purchasing on demand and replenishing in small batches. High-priced goods struggle to see volume, often resulting in "quotes rise, actual transaction prices lag," intensifying upstream-downstream bargaining.
The core shortcoming limiting sustained filament gains remains weak end-demand. The textile market is at a seasonal transition point; domestic autumn/winter fabric stocking has just begun, with a slow pace. Foreign trade orders have not recovered as expected, overseas destocking pressure persists, weaving factory operating rates are at recent lows for the season, and grey fabric inventories remain high. The upstream supply gap is a short-term positive, while downstream consumption recovery requires more time. If filament prices rise too quickly, they will squeeze weaving margins and trigger negative feedback, forcing polyester plants to concede on prices.
Outlook: support at the bottom, height depends on demand
In the short term, the low-inventory pattern for PTA will persist, providing bottom support for filament prices, which are unlikely to see deep corrections and will maintain a range-bound strong pattern. However, medium- to long-term price heights do not depend on upstream raw materials but on the realization of terminal orders. As maintenance units restart later, PTA supply will gradually recover, easing supply tightness and weakening the upward momentum from raw materials. If weaving orders continue to improve and grey fabric destocking completes, filament prices may sustain gains; otherwise, insufficient demand will compress upside, leading to high-level fluctuations with cost and demand pulling against each other.
Overall, this round is a cost-push rally. Filament has some resilience but is unlikely to experience sustained unilateral surges. Industry chain enterprises should avoid blindly chasing gains. Upstream plants need to rationally pace price increases, downstream weaving mills should manage raw material inventories based on demand, and all parties should closely track PTA unit restart progress, crude oil fluctuations, and autumn/winter peak season order placements in September-October, while guarding against price volatility risks from speculation.