In the 34th week of 2026 (August 24-28), textile commodity prices showed a rare "ice and fire" divergence: the three major polyester filament varieties all rose over 1.7%, while acrylonitrile fell 4.46% and PTA dropped 3.67%. Within the same week, upstream raw materials and downstream chemical fibers moved in opposite directions, indicating that cost transmission mechanisms are failing and profit distribution across the industrial chain is entering a rebalancing phase.
Event Background
Monitoring data from Shengyi Society showed that among the textile sector commodities, 10 products rose week-on-week, with polyester POY, DTY, and FDY leading gains at 2.00%, 1.76%, and 1.70% respectively. Only three products declined: acrylonitrile (-4.46%), PTA (-3.67%), and polyester staple fiber (-0.96%). The overall average weekly change was merely 0.03%, but internal divergence was sharp.
Notably, polyester filament and polyester staple fiber—both in the same polyester chain—moved in opposite directions: filament rose while staple fell. This reflects differences in end-use demand: filament is mainly used for apparel fabrics, while staple is used for home textiles and nonwovens. The divergence indicates uneven recovery in terminal consumption, with apparel orders stronger than home textiles and industrial textiles.
Meanwhile, PTA, the main raw material for polyester, fell 3.67% instead of rising. From a cost perspective, lower PTA should ease cost pressure for polyester producers, yet filament prices rose against the trend, suggesting the increase was demand-driven rather than cost-pushed. Profit is shifting from upstream PTA to downstream filament.
Industry Impact
Polyester filament prices are up over 21% year-on-year, with POY up 24.25%, far exceeding cotton yarn (about 5.6%) and viscose staple fiber (about 10.4%). For weaving mills relying heavily on polyester, raw material cost pressure has intensified, especially for small and medium-sized mills whose profit margins are being squeezed.
Acrylonitrile fell 4.46% in a week but still up 44.12% year-on-year, indicating a high-level correction after an overheated rally. Acrylonitrile is a feedstock for acrylic fiber and ABS resin; its price directly affects the cost of acrylic yarn and carbon fiber precursor. For acrylic producers, falling raw material costs help repair margins, but downstream demand remains a question.
PTA's 3.67% drop still leaves it 26.54% higher year-on-year, showing a significantly elevated price base. For polyester plants, lower PTA reduces procurement costs, while higher filament prices increase selling prices—the combination widens processing margins. This margin recovery may prompt restart of previously idled capacity, affecting future supply-demand balance.
From an industrial cluster perspective, filament price gains directly benefit leading enterprises in chemical fiber clusters like Shengze and Changxing, which have strong pricing power to pass costs downstream. In Keqiao, a major fabric trading hub, intermediaries may face "buy high, sell low" dilemmas, increasing inventory management difficulty.