PTA up 54% year-on-year while cotton yarn manages only 5%—within a single week, two key textile raw material indicators traced completely different curves. Industry price monitoring for week 38 of 2026 (September 21–25) shows mixed movements across the textile sector, with an average weekly change of -0.11%. But that narrow headline figure masks intensifying structural divergence within the supply chain.
Signals at Both Ends
Gainers clustered in polyester upstream and regenerated fiber segments. PTA rose from 7,049.30 yuan/tonne at the start of the week to 7,147.50 yuan/tonne, leading with a 1.39% gain. Viscose staple fiber edged up 0.41% to 14,580 yuan/tonne, while polyester POY added 0.40% to 9,380 yuan/tonne. Viscose yarn and polyester DTY posted modest increases of 0.27% and 0.20% respectively.
Decliners concentrated in polyester filament and cotton spinning. Polyester FDY fell 1.57% from 9,786.67 to 9,633.33 yuan/tonne. Cotton yarn 21S and 32S dropped 1.27% and 1.20%, settling at 23,366.67 and 24,800 yuan/tonne. Cotton lint and polyester staple fiber also slipped marginally.
Notably, raw silk, spandex, all nylon specifications, acrylonitrile, and polyester yarn held flat week-on-week. This broad stalemate suggests buyers and sellers are locked in a standoff at current levels, with no directional driver in sight.
The Real Contradiction Behind Year-on-Year Data
Weekly fluctuations were limited, but the year-on-year picture is far starker. PTA surged 54.21% annually. Nylon POY rose 38.88%, acrylonitrile 36.10%, polyester FDY 35.80%, polyester POY 34.96%, polyester staple fiber 33.75%, and polyester DTY 31.46%. The polyester and chemical fiber chain recorded annual gains above 30% almost across the board.
Cotton spinning stands in sharp contrast. Cotton yarn 21S rose just 5.89% year-on-year, cotton yarn 32S 5.31%, and viscose yarn 6.97%. Even cotton lint's 15.18% annual gain pales beside the chemical fiber camp. More tellingly, raw silk fell 6.17% year-on-year—the only negative annual reading for the week.
What does this divergence mean? For downstream weavers and garment makers, cost pressure from chemical fibers far exceeds that from cotton. Take polyester FDY: if its 35%-plus annual increase cannot be passed through to fabric prices, filament weaving margins will remain under sustained compression. Cotton spinners face a different bind: the scissors gap between raw material costs (cotton lint up 15% annually) and yarn selling prices (cotton yarn up 5%) is narrowing, squeezing processing margins equally.
Transmission Logic Across Industrial Clusters
The impact varies sharply by region. Clusters centered on chemical filament weaving, such as Keqiao and Shengze, face elevated raw material costs from polyester FDY and POY's annual surges. Although POY edged up while FDY fell this week, annual gains above 30% mean these weavers have been absorbing high-priced inputs all year.
Cotton spinning and home textile hubs like Nantong and Foshan confront a dual squeeze: weak end demand and rigid raw material costs. Cotton yarn's weekly decline of 1.2–1.3% signals that spinners are already conceding price to move inventory, yet cotton lint remains 15% above year-ago levels, significantly eroding spot processing margins.
More broadly, polyester's steep annual gains reflect the past year's rise in crude oil and aromatic costs, while cotton spinning's limited annual increase mirrors insufficient recovery in end-user textile consumption. Together, they form the classic pattern now defining textiles: upstream holds firm, downstream lacks momentum.
Practical Implications for Procurement and Capacity
In the short term, the weekly average change of just -0.11% indicates a weak equilibrium. Polyester upstream is supported by costs and biased toward gains, but resistance to downstream transmission is mounting. Cotton yarn's decline may prompt downstream weavers and garment makers to delay purchases and wait for lower yarn prices.
Medium term, the shifting price ratio between chemical fibers and cotton is reshaping cost models for fabric development. When polyester staple fiber rises 33.75% annually while cotton yarn gains only 5%, formulations for blended products may need reassessment—not merely a pricing issue, but one involving order quotation cycles and raw material locking strategies.