September's textile raw material market did not deliver a uniform rise or fall, but a sharply split curve. The polyester chain turned broadly positive, with PTA leading at a 14.67% month-on-month gain, followed by nylon POY and polyester staple fiber. Cotton moved the other way, with lint falling 5.2% and acrylonitrile dropping further. Within a single month, cost-push and weak demand each carved out their own territory, and that matters far more to buyers than any single price move.
Gain Structure: Why the Polyester Chain Rose Together
This round of gains was heavily concentrated on the chemical fiber side. Industry public data shows 12 textile commodities rose month-on-month, with nine gaining more than 5%, over half of the monitored basket. PTA, nylon POY and polyester staple fiber led, while nylon FDY, polyester POY, nylon DTY, polyester FDY, polyester DTY and polyester yarn all rose between 5.79% and 7.94%, forming a complete transmission from feedstock to yarn.
This synchronized rise was not driven by a sudden surge in end-user orders. It more likely reflects upstream cost increases combined with periodic restocking. The polyester chain transmits price hikes quickly through POY, FDY and DTY, with gains decaying along the way. For downstream weaving and dyeing firms, this means raw material cost pressure will concentrate within weeks, while fabric quotes tend to lag, squeezing margins.
Year-on-year figures add another layer. PTA rose 59.46% year-on-year, polyester staple fiber, POY, FDY and DTY all gained 31% to 37%, and nylon POY rose 38.88%. Such high yearly numbers partly reflect a low base a year earlier. To judge whether prices are truly elevated, month-on-month and year-on-year must be read together, rather than letting the yearly figure alone set the narrative.
Cotton and Acrylonitrile: Demand Signals Behind the Decline
In contrast to the hot chemical fiber side, cotton-linked varieties came under pressure. Lint fell 5.2% month-on-month, cotton yarn 32S and 21S slipped 1.0% and 1.27%, while viscose staple fiber and spun rayon yarn edged up only about 1.2%, essentially flat. Cotton weakness usually points to insufficient textile end demand, especially when apparel export orders fail to follow through, prompting spinning mills to pull back on purchasing.
Acrylonitrile fell 5.69% month-on-month but still rose 35.07% year-on-year, indicating its absolute price has not returned to a low level but is retreating from earlier highs. Spandex fell 1.69% month-on-month yet rose 19.59% year-on-year, again a high-level correction rather than a trend reversal. Declines in these varieties mostly reflect short-term thinning transactions. For elastic fabric makers using spandex, this is a window to lower costs, but not a reason for long-term bearishness.
Raw silk rose 4.43% month-on-month but fell 4.65% year-on-year, the only gainer with a negative yearly reading. This combination suggests raw silk is still repairing earlier losses and has not returned to year-ago levels. For silk fabric and home textile firms, cost pressure is relatively manageable, but supply changes after the autumn cocoon season warrant attention.
Real Impact on the Supply Chain
Polyester gains are a profit-recovery window for upstream chemical fiber plants but a cost test for midstream weavers. If fabric quotes cannot be raised in tandem, weavers may cut operating rates or adjust product mix toward higher-value items. Firms in chemical fiber fabric clusters such as Keqiao and Shengze will feel rising working capital tied up in raw material purchases.
Cotton weakness cuts both ways for spinning mills. On one hand, lower raw material costs help ease losses; on the other, lint declines often drag yarn prices down, and cotton yarn 32S and 21S have already fallen month-on-month, showing that price cuts have not brought order volume. Cotton-based home textile and apparel fabric clusters in Nantong and Foshan need to guard against a wait-and-see purchasing mentality that leads to passive inventory buildup.
Transmission to exporters is more direct. If polyester fabric export quotes adjust to raw material gains, price competitiveness may weaken; cotton products, by contrast, gain some bargaining room from softer raw materials. Changes in export structure reflected in China Customs data typically lag raw material prices by one to two months, so exporters should communicate pricing windows with clients in advance to avoid one-sided cost swings during order execution.
Overall, the textile sector's average monthly change was 4.07%, with gainers clearly outnumbering decliners, but divergence was above average. This means a one-size-fits-all sourcing strategy no longer works. Setting strategy by variety and by position in the supply chain is the more prudent approach.