The textile commodity price report for the 34th week of 2026 (August 24-28) reveals a striking divergence: polyester filament yarn prices rose against the trend, while upstream raw materials PTA and acrylonitrile fell sharply. This upstream-downstream divergence exposes the profit distribution and supply-demand contradictions in the textile industry chain. Polyester POY rose 2.00% to 8767.50 yuan/ton, DTY and FDY increased 1.76% and 1.70% respectively, while PTA fell 3.67% and acrylonitrile plunged 4.46%. The overall average change was only 0.03%, hiding a turbulent undercurrent beneath a calm surface.
The Logic Behind Price Divergence
The divergence between polyester filament yarn and feedstock PTA is not accidental. Year-on-year, POY is up 24.25%, DTY up 21.66%, FDY up 21.81%, while PTA has risen 26.54% and acrylonitrile an astonishing 44.12%. This suggests that raw materials have accumulated substantial gains over the past year, and this week's decline is more likely a technical correction after excessive earlier increases. The rise in polyester filament reflects increased restocking by downstream weaving mills, particularly with the start of autumn/winter fabric orders, directly boosting POY and DTY demand.
Notably, polyester staple fiber fell 0.96% this week, contrasting sharply with filament trends. Staple fiber is mainly used in nonwovens and filling materials, with weaker seasonal demand. Its decline indicates uneven recovery in end-use consumption. Meanwhile, viscose staple fiber and rayon yarn rose 0.42% and 0.69%, respectively, showing moderate growth in the regenerated cellulose fiber sector, consistent with the long-term logic of capacity constraints under stricter environmental policies.
Weak Signals from Upstream Raw Materials
Acrylonitrile fell 4.46% to 11433.33 yuan/ton, the biggest decliner this week. Used mainly in acrylic fiber and ABS resin, its sharp drop is closely tied to crude oil price fluctuations and low downstream operating rates. Despite a year-on-year gain of 44.12%, the short-term plunge may trigger cost revaluation by acrylic fiber producers, affecting pricing strategies in the nylon chain. Nylon DTY and POY rose modestly by 0.97% and 0.86%, indicating that nylon plants remain cautious about passing on lower raw material costs to end products.
PTA's 3.67% decline to 6213.25 yuan/ton is a double-edged sword for the polyester chain. On one hand, lower feedstock costs improve processing margins for polyester mills; on the other, sustained PTA weakness may dampen price expectations for polyester filament, especially given that filament gains have already outpaced raw material increases. Historical experience shows that when the PTA-polyester spread widens to over 2000 yuan/ton, polyester mills' price-support willingness weakens, increasing the risk of price pullbacks.
Transmission Effects on Procurement and Foreign Trade
This week's price movements have structural implications for buyers and exporters. Rising polyester filament means higher procurement costs for autumn/winter fabric orders, but given year-on-year gains exceeding 20%, downstream weaving mills may pass on costs by raising fabric quotes. In contrast, falling PTA and acrylonitrile offer a temporary profit window for chemical fiber plants, but exporters must be wary of quoting uncertainty caused by raw material volatility.
Cotton lint rose marginally by 0.06%, while cotton yarn prices were flat, indicating relative stability in the cotton textile chain. Spandex prices remained unchanged, with a year-on-year gain of 21.65%, showing sustained demand for stretch fabrics. For exporters, the price gap between polyester and cotton yarn is at historical highs, potentially shifting some orders toward cotton products—a substitution effect worth monitoring.