Rising raw materials and falling finished goods rarely move in opposite directions within the polyester chain, but the price data for September 24, 2026 made that divergence explicit. According to China Customs and publicly available industry data, PTA stood at 7,147.50 yuan per tonne, up 2.85% in a single day and 56.30% year on year. Polyester staple fiber reached 8,596.75 yuan per tonne, gaining 1.53% daily and 33.80% annually. Yet polyester FDY, POY and DTY fell 1.37%, 1.19% and 0.27% respectively. Upstream prices surging while downstream prices retreat is a scissors gap that every sourcing manager and mill operator should examine closely.
The Real Picture of Price Divergence
Start with the full landscape. Only two textile commodities rose on the day, while four declined, with an average daily change of just 0.08%. This was not a one-way market but a structural adjustment. PTA and polyester staple fiber were the only gainers. Most other items — raw silk, acrylonitrile, cotton yarn 21S, cotton yarn 32S, polyester yarn, viscose staple fiber, spandex, rayon yarn, nylon DTY, nylon FDY and nylon POY — closed flat. Cotton lint edged down 0.23%.
The year-on-year dimension deserves attention. PTA rose 56.30%, polyester staple fiber 33.80%, polyester FDY 35.80%, polyester POY 34.84% and polyester DTY 31.36%. Although filament yarns pulled back on the day, over a one-year horizon the entire polyester chain has seen a significant upward shift in its price center. The daily decline looks more like a technical correction at a high level than a trend reversal.
The nylon segment is equally noteworthy. Nylon POY rose 38.88% year on year, nylon FDY 26.55% and nylon DTY 29.83%, outpacing even polyester filament. Spandex gained 19.59% annually, and viscose staple fiber 11.13%. By contrast, raw silk fell 6.17% year on year, making it one of the few textile commodities to weaken over the annual period.
Why Profits Are Being Redistributed Along the Chain
PTA's nearly 3% single-day jump directly raised the raw material cost for polyester chips and staple fiber. Staple fiber followed with a 1.53% gain, suggesting relatively smooth cost pass-through and acceptable downstream acceptance. But filament yarns — FDY, POY and DTY — fell instead of rising, indicating that filament mills are facing a different set of dynamics: elevated operating rates, accumulating inventory pressure and cautious purchasing from weaving and texturing segments.
In other words, PTA's rise was cost-driven, while filament's decline was supply-demand-driven. Combined, profits along the polyester chain are shifting from the filament segment toward upstream raw materials. For filament mills, rising input costs and falling product prices mean processing spreads are being squeezed, and cash flow pressure will likely surface in the coming weeks.
From an industrial belt perspective, polyester filament and weaving clusters in Keqiao (Shaoxing), Shengze (Suzhou) and Changle (Fujian) are most sensitive to FDY, POY and DTY price swings. Texturing and water-jet weaving firms in Shengze typically purchase on order-locked pricing, so falling filament prices benefit their raw material costs in the short term. But if finished fabric quotes move down in tandem, that benefit is quickly offset. Fabric traders in Keqiao are more focused on whether PTA and staple fiber gains will pass through to polyester yarn and blended fabric quotes. Polyester yarn closed flat, suggesting the transmission has not yet fully unfolded.
The cotton spinning chain remains relatively calm. Cotton yarn 21S and 32S both closed flat, up 5.89% and 5.31% year on year respectively. Cotton lint dipped 0.23% but remained 15.30% higher annually. The domestic-international cotton price spread and Xinjiang cotton processing progress remain the core variables for cotton yarn costs, but the daily data showed no significant anomalies.
Practical Implications for Sourcing and Export
The key takeaway from this divergence is simple: do not judge the overall trend from a single commodity's movement. Rising PTA and staple fiber mean cost pressure for products using staple fiber as input, such as sewing thread, nonwovens and filling cotton. Falling filament prices, meanwhile, create short-term bargaining room for apparel and home textile fabrics made from FDY, POY and DTY.
For exporters, year-on-year data matters more than daily data. PTA up 56.30% and nylon POY up 38.88% indicate that the raw material cost center has risen substantially over the past year. If export orders are still executed at old prices, margins will be eroded. Quotations should incorporate annual raw material inflation into the cost model rather than relying solely on daily quotes.