On the same day, the upstream and downstream of the polyester chain moved in opposite directions: PTA surged 2.85% in a single session, polyester staple fiber followed with a 1.53% gain, while POY, FDY and DTY fell 1.19%, 1.37% and 0.27% respectively. This combination of rising raw materials and falling finished goods is unusual and signals not a broad rally but a redistribution of profits along the supply chain.
The Logic Behind the Divergence
According to China Customs and industry public data, PTA rose from 6,949.50 yuan/tonne to 7,147.50 yuan/tonne, up 56.30% year-on-year. Polyester staple fiber climbed from 8,467.46 yuan/tonne to 8,596.75 yuan/tonne, a 33.80% annual gain. The strength in upstream varieties stems mainly from rigid cost support and expectations of supply tightening due to maintenance at some plants.
Filament, however, did not follow. POY fell to 9,380.00 yuan/tonne, FDY to 9,633.33 yuan/tonne and DTY edged down to 10,623.57 yuan/tonne. Their year-on-year gains remain in the 31% to 36% range, suggesting the decline is a high-level correction rather than a trend reversal.
Notably, cotton yarn 21S and 32S, viscose staple fiber, spandex, the entire nylon series and spun rayon yarn were all flat on the day, as were raw silk and acrylonitrile. The average daily change for the whole textile sector was just 0.08%, indicating no consensus direction and highlighting divergence as the dominant theme.
Why Upstream-Downstream Transmission Is Blocked
The core contradiction in the polyester chain is that price increases in PTA and staple fiber must pass through chip and spinning stages before reaching filament, and the social inventory level of filament determines whether factories have the confidence to raise prices. When order follow-through at the weaving end is insufficient, filament plants can only destock by offering discounts, creating the divergence of rising raw materials and falling filament.
Year-on-year figures show filament gains are not low: FDY is up 35.80%, POY 34.84% and DTY 31.36%. This means filament prices are already at relatively high levels, and downstream weavers have limited willingness to chase further increases, visibly delaying procurement.
Cotton edged down 0.23% to 17,399.17 yuan/tonne but remains up 15.30% year-on-year, while cotton yarn prices held steady. This suggests weak transmission in the cotton spinning segment as well, with mills choosing to hold prices and wait rather than adjust actively.
For fabric clusters such as Keqiao and Shengze, a single-day jump in raw materials quickly raises inquiry costs, but whether it translates into actual transactions depends on replenishment willingness in apparel and home textiles. So far, replenishment signals remain unclear.
Impact on Industrial Clusters and Exporters
If upstream price support cannot reach filament and fabrics, pressure will ultimately fall on processing margins at polyester plants. If the spread between staple fiber and PTA continues to narrow, cash flow at staple fiber plants will be squeezed, and some units may cut operating rates to balance supply and demand.
For weavers, softer filament prices should be an opportunity to lower costs, but if upstream PTA continues to strengthen, filament plants could tighten discounts at any time, leaving a narrow procurement window. Such oscillating markets test factories' raw material inventory management.
Exporters face another layer of pressure. With polyester filament gains generally exceeding 30% year-on-year, dollar-denominated export quotes are rising, making overseas buyers more price-sensitive. Some orders may shift to other suppliers or be postponed.
Nylon, spandex and viscose were flat on the day, but their year-on-year gains range from 26% to 39%, indicating a clear upward shift in the cost centre of the entire chemical fibre sector. Exporters who ignore the year-on-year dimension when quoting risk underestimating the combined volatility of exchange rates and raw materials.