On June 28, 2026, the Wangjiangjing market polyester filament price data sent a warning signal: against a backdrop of generally low transaction volumes, the price system began to show structural divergence. FDY 150D/96F and 100D/72F specifications dropped by 100 yuan per ton within just three days, while DTY and POY series remained flat across the board. What does this pattern of 'partial loosening, overall weakness' mean?
Background
From the latest price list, FDY semi-dull series with deniers of 100D/48F and below held steady, indicating some support from weaving mills' just-in-time demand. However, 100D/72F (Zhejiang Jiuhua) fell to 9,000 yuan/ton, down 100 yuan from June 25; 150D/36F (Xinfengming) dropped to 8,600 yuan/ton, also down 100 yuan. The FDY bright series showed a similar pattern: 150D/84F (Yixing Huaya) reported flat at 8,600 yuan/ton, but overall trading sentiment was subdued.
In contrast, POY and DTY categories exhibited stronger 'resilience.' All POY specifications, from 50D/48F to 300D/96F, were unchanged from three days ago, with no price adjustments. The DTY series also remained entirely stable, with DTY network 75D/72F (Shenghong Chemical Fiber) at 11,100 yuan/ton, holding at a high level. This price divergence reflects the different roles these categories play in downstream demand.
Notably, support from upstream polyester raw materials is weakening. PTA and MEG markets have recently softened, directly undermining the cost support for polyester filament. Combined with slow inventory digestion and insufficient new orders at downstream weaving mills, buyers are adopting a 'hand-to-mouth' procurement strategy, reluctant to build stock.
Industry Impact
From an industrial belt perspective, Wangjiangjing, as an important chemical fiber trading hub in Jiangsu and Zhejiang, its price movements often serve as a bellwether. The price decline in some FDY specifications primarily impacts the conventional fabric production segment dominated by water-jet looms. These enterprises operate on thin margins; a drop of 100 yuan per ton in raw materials, while modest in magnitude, will exacerbate bearish market expectations, further compressing procurement pace.
For the stability of DTY and POY, one must understand supply and demand dynamics. DTY is mainly used for mid-to-high-end products like faux silk and stretch fabrics, with relatively stable downstream customers and manageable inventory levels, giving manufacturers no incentive to cut prices. POY, as an intermediate product, its price stability also reflects rational capacity utilization in the upstream spinning stage, avoiding distressed selling.
This structure of 'FDY falling, DTY/POY stable' sends a key signal: current demand weakness is not comprehensive but concentrated in conventional, commodity-grade varieties. Differentiated, fine-denier, and functional products still retain some pricing power. For buyers, this means more refined inventory management—conventional varieties can be watched for better prices, while special specifications should not be squeezed too aggressively.
Looking at the upstream-downstream transmission chain, downward pressure on polyester filament prices will ultimately pass to grey fabric and finished fabric segments. If FDY prices continue to decline, fabric mills' cost reduction could trigger a new round of fabric price cuts, especially against a backdrop of sluggish growth in foreign trade orders, intensifying competition in the domestic market.