When PTA futures once again broke through the 6,000 yuan per ton mark, bullish sentiment in the chemical fiber market was almost instantly ignited. Yet the response in the polyester filament spot market was telling: prices were raised on paper, but transactions lagged, and the tug-of-war between upstream and downstream intensified. How far can this cost-driven rally go? The answer may not lie in upstream plant maintenance schedules, but in the order books of weaving mills.
Supply Contraction Lifts PTA, Inventory Structure Becomes Key Variable
The direct driver of this PTA surge is a significant supply contraction. Since the second quarter, multiple large domestic PTA units entered annual maintenance, compounded by a temporary shortage of PX feedstock, pushing industry operating rates down to below 60%, the lowest in nearly a decade. Low operating rates directly changed the inventory structure: social inventories declined for months, spot supply tightened, basis strengthened, and spot premiums rose. More crucially, no new PTA capacity has been added this year, easing long-term supply expansion pressure and providing medium-term support for prices.
Meanwhile, international oil prices rose amid geopolitical disruptions to energy transport, pushing up PX costs and transmitting pressure down the chain. Polyester producers saw production costs rise passively, strengthening their resolve to hold prices. However, this supply contraction is a temporary bullish factor; once maintenance ends and supply recovers, the upward momentum will ease.
Polyester Filament Lags, Profit Distribution Conflicts Emerge
Theoretically, PTA accounts for over 60% of polyester filament production costs, so raw material price hikes should drive filament prices up in tandem. But spot market performance fell short: filament plants raised quotes, and some specifications saw improved sales, yet weaving mills showed weak willingness to chase highs, preferring hand-to-mouth purchasing and small batch restocking. High-priced goods struggled to move in volume, leading to a frequent pattern of "quotes rising but actual transaction prices stagnant," intensifying upstream-downstream friction.
The essence of this transmission failure is imbalanced profit distribution across the chain. Upstream raw material suppliers hold pricing power through supply cuts, while downstream weaving mills cannot pass on cost pressures due to weak end-demand. Profit margins at weaving mills are squeezed further, accumulating negative feedback risks. If filament prices rise too quickly, downstream may force polyester plants to concede and cut prices, leading to a sharp reversal.
End-Demand Is the Ceiling, Seasonal Peak Becomes Key
The core weakness limiting sustained filament gains remains real end-demand. The textile market is at a seasonal transition point: domestic autumn/winter fabric stocking has just begun and is slow; foreign trade orders are recovering less than expected, with overseas destocking pressure persisting. Weaving mill operating rates remain at low levels for the season, and greige fabric inventories are not fully digested.
This means the upstream supply gap is short-term, while downstream consumption recovery takes longer. In the near term, low PTA inventories will persist, providing bottom support for filament prices, preventing deep corrections and maintaining a firm-to-fluctuating pattern. But medium-term price levels do not depend on raw materials; they depend on order realization. If weaving orders continue to recover and greige inventories clear smoothly, filament prices may extend gains; otherwise, upside will be severely capped, and prices are likely to fluctuate in a high range awaiting direction.
Rational Response to Cost-Push Cycle
Overall, this rally is cost-push in nature. Filament prices have some resilience but are unlikely to sustain a one-way surge. Companies across the chain should avoid blindly chasing highs: upstream plants need to manage price increases rationally to avoid overstretching downstream tolerance; downstream weaving mills should control raw material inventories based on actual order demand, closely tracking PTA plant restarts, oil price fluctuations, and the fall/winter peak season orders in September-October.