A price increase of RMB 50 to 200 per tonne may look modest, but it is enough to force the entire polyester filament chain to recalculate its profit sheet. In mid-September 2026, quotations from the Wangjiangjing market covered nearly all mainstream specifications across FDY, POY and DTY. The sharpest move came from 150D/96F FDY, which jumped RMB 200 per tonne, while most conventional items rose RMB 100. More noteworthy is that prices climbed while sales volume fell — this divergence between price and volume is the key angle for judging the market outlook.
Price Structure: Who Leads, Who Follows
Among the sub-categories, semi-dull FDY was the most uniformly rising segment. The two fine-denier specifications, 50D/24F and 68D/24F, saw quotes from major origins generally rise by RMB 100, with some mills reaching RMB 150. The 150D/96F specification posted the largest gain, with Rongsheng, Tiansheng, Hengyi and Jiabao all raising prices by RMB 200, pushing tax-inclusive quotes into the RMB 9,700-9,750 range.
POY adjustments were relatively restrained, with mainstream specifications mostly up by RMB 100. Tax-inclusive quotes for 50D/48F, 75D/96F and 100D/96F mostly fell between RMB 9,750 and 9,950, reflecting limited willingness among texturing mills to absorb higher feedstock costs. In DTY, conventional items rose mainly by RMB 100, but 100D/36F from the Xiaoshan Yemao origin saw a RMB 200 increase, indicating greater pricing power for differentiated specifications.
Why is the divergence between fine-denier and coarse-denier FDY so pronounced? The answer lies in the downstream weaving demand structure. Fine-denier yarns such as 50D/24F serve lightweight fabrics and high-end silk-like products, where orders are relatively rigid. 150D/96F is used more in conventional home textiles and decorative fabrics, where volumes are large and broad, so any movement in raw materials is transmitted to prices fastest.
Industrial Impact: Cost Transmission and Volume-Price Divergence
Firm upstream polyester raw material prices are the direct driver behind this round of quotation increases. High feedstock costs mean polyester filament mills are squeezed from both ends: raw material procurement costs remain elevated on one side, while falling sales volume creates inventory pressure on the other.
As a major chemical fiber weaving cluster in the Yangtze River Delta, Wangjiangjing's quotations serve as a bellwether for downstream fabric markets such as Shengze and Keqiao. When FDY and DTY rise in tandem, weaving mills will see raw material costs reflected in grey fabric quotes within one to two weeks. But the current decline in sales volume shows downstream buyers are unwilling to accept price hikes unconditionally — weaving mills are digesting earlier inventory, while traders wait to see whether raw material strength can persist.
This volume-price divergence has a two-way impact. For mills, higher quotes can restore processing margins, but if sales remain sluggish, inventory accumulation will force some producers to concede discounts in actual transactions. For buyers, a higher nominal quote does not mean the transaction price rises in step; in fact, the bargaining window for bulk purchases may open.
From a regional perspective, quote adjustments by leading enterprises such as Zhejiang Tongkun, Xinfengming, Rongsheng and Hengyi have a demonstration effect, with small and medium-sized mills in Changshu, Taicang and Wujiang in Jiangsu often following suit. This means the rally is not a localized phenomenon but a coordinated move covering major chemical fiber capacity across Jiangsu and Zhejiang.
Practical Recommendations
For Buyers - Focus on actual transaction prices rather than list prices; bulk purchases can seek extra discounts when sales are slow - Fine-denier FDY such as 50D/24F and 68D/24F has rigid demand; consider locking in medium- to long-term contracts - Conventional 150D/96F saw the largest increase; consider waiting or sourcing from alternative origins - Closely track polyester raw material trends; once feedstock softens, filament prices will correct quickly
For Mills - Prioritize controlling raw material inventory during a sales downturn to avoid high-priced feedstock combined with finished goods backlog - Differentiated specifications such as DTY mesh 75D/72F still command a premium; adjust product mix accordingly - Maintain price communication with downstream weavers to avoid losing orders through overly rapid adjustments - Watch quotation moves by leading Jiangsu and Zhejiang enterprises as a reference for your own pricing rhythm
Overall, this round of polyester filament increases is cost-driven, with no synchronized strengthening on the demand side. Short-term quotes may still have upward momentum, but sustainability depends on whether raw material prices stay high and whether downstream orders follow through. For all parties in the chain, what is needed now is not chasing the rally but refined management of inventory and procurement rhythm.