In the final week of August 2026, the textile raw material market showed a rare "ice and fire" pattern. Polyester filament prices strengthened collectively, with POY rising 2.00% week-on-week, DTY and FDY up 1.76% and 1.70% respectively. Meanwhile, acrylonitrile plunged 4.46% and PTA fell 3.67%. This divergence between upstream declines and midstream gains is reshaping cost and profit distribution across the textile chain, offering direct reference for buyers and mills in short-term decision-making.
Market Divergence: Polyester Chain vs. Upstream Raw Materials
Weekly data showed that the three major polyester filament varieties rose between 1.70% and 2.00%, with year-on-year gains exceeding 21%, indicating a significantly higher price center. Meanwhile, PTA, the main raw material for polyester, fell 3.67% week-on-week but still up 26.54% year-on-year; acrylonitrile dropped 4.46% weekly, yet up 44.12% annually. This "upstream down, downstream up" divergence implies that polyester producers' processing margins expanded notably during the week, possibly stimulating higher operating rates and increasing demand for PTA.
Notably, nylon filament products also posted modest gains: DTY +0.97%, POY +0.86%, and FDY +0.29%, with year-on-year increases between 14% and 21%. Viscose and rayon yarns rose 0.42% to 0.69%. In contrast, cotton yarn prices were flat, and spandex unchanged, signaling a wait-and-see mood in cotton and spandex chains.
Cost Transmission and Supply-Demand Game: The Logic Behind Divergence
The opposite movements of polyester filament and PTA reflect time lags in cost transmission and supply-demand dynamics. PTA's decline may stem from recent crude oil pullbacks and ample PX supply, while polyester filament gains likely driven by downstream weaving restocking. This "lower cost, higher product" combination short-term benefits polyester mills' profit repair, but sustainability depends on end-order support.
Acrylonitrile's sharp drop may relate to loose supply-demand, despite high year-on-year gains. For acrylic fiber producers, lower feedstock costs help ease profit pressure but may trigger expectations of product price cuts.
Year-on-year, all monitored items remain above last year, with acrylonitrile up 44.12%, PTA 26.54%, and polyester POY 24.25%. This suggests that despite weekly fluctuations, overall price levels are still at multi-year highs, and cost pressure has not truly eased but is being redistributed among different segments.
Industrial Belt Reactions and Procurement Pace Adjustments
In major polyester filament production areas such as Shengze and Changxing, factory quote increases have transmitted to grey fabric markets, with some weavers locking in raw material inventories ahead of time. Meanwhile, the PTA price drop has led some polyester plants to adopt a "hand-to-mouth" procurement strategy to avoid inventory depreciation. Such divergent behaviors may further amplify short-term price volatility.
For home textile and apparel brands, the divergence means cost trends for different fabric categories will differ. Polyester fabrics still have strong cost support, while cotton products remain relatively stable, potentially affecting next quarter's pricing and procurement plans.
Practical Recommendations
For Buyers - Monitor the spread between PTA and polyester filament; if the spread widens, consider placing more polyester fabric orders to lock in current costs. - For acrylonitrile-based products (e.g., acrylic yarn), postpone bulk purchases until prices stabilize, but stay alert to rebound risks from upstream production cuts. - Cotton yarn prices are stable; purchase on demand to avoid inventory buildup from raw material fluctuations.
For Foreign Trade Companies - Incorporate raw material price volatility into quotations; adopt short-term floating quotes or monthly adjustment mechanisms to hedge cost changes. - Monitor RMB exchange rates and imported raw material costs; for import-dependent items like PTA, exchange rate swings may offset price advantages. - When signing long-term contracts with upstream suppliers, set price adjustment clauses based on weekly price indices to reduce unilateral fluctuation risks.
In summary, this week's divergence in raw material prices reflects both cost transmission mechanisms and supply-demand rebalancing signals. For industry participants, rather than chasing daily ups and downs, focusing on spreads and inventory cycles is key to seizing the initiative amid volatility.