On September 1, 2026, polyester filament prices in the Wangjiangjing market rose broadly, with most specifications increasing by 50 to 100 CNY per ton, and POY 150D/48F jumping 200 CNY in a single day. This price hike is not an isolated event—strong upstream polyester raw material prices are pushing costs down the chain to weaving and apparel. For buyers, this means the cost floor may have risen, and bargaining space will narrow in the short term.
Scope of Price Increases
Public quotes show that the adjustment covers four major categories: FDY, POY, DTY, and DTY network yarn, involving more than ten major chemical fiber companies including Rongsheng, Tongkun, Xinfengming, Hengyi, and Shenghong. Among them, FDY semi-dull 50D/24F rose by 50 to 100 CNY per ton, with Xinferngming, Shenghong, and Jiabao all increasing by 100 CNY; 75D/36F and 100D/48F also followed with 100 CNY increases. POY series, except for fine denier specs like 50D/48F and 75D/96F which remained flat, generally rose by 100 to 200 CNY, with 150D/48F jumping from 8,900 to 9,100 CNY. DTY and network yarn showed divergence: regular DTY mostly held steady, but 75D/36F and 100D/36F rose by 40 to 50 CNY, while network yarn 75D/72F and 100D/36F increased by around 100 CNY.
In absolute terms, FDY semi-dull 50D/24F has crossed the 10,000 CNY per ton threshold, POY 300D/96F is quoted at 8,850 CNY, and DTY 150D/48F remains at 9,950 CNY. Compared with August 30, the overall price level has moved up, reflecting market confirmation of cost support. Notably, the spread between POY and FDY has narrowed to within 1,000 CNY, which means downstream texturizing mills' profit margins are further squeezed, and DTY price increases may gain momentum later.
Cost Pass-Through and Demand Game
The direct driver of this price hike is the upstream polyester raw material sector. PTA and MEG have recently strengthened sharply, leading to a rigid increase in production costs for polyester plants. Under cash flow pressure, polyester filament producers have chosen to raise ex-factory prices to partially pass on cost pressures. However, the sustainability of the price increase depends on whether downstream demand can absorb it. Market feedback shows that FDY 75D/144F is selling well, and DTY 150D/188F is seeing rising buying interest, indicating that weaving mills are restocking, but mostly for immediate needs, with little speculative hoarding.
For weaving factories, higher raw material prices mean increased production costs, and grey fabric quotes face upward pressure. However, if terminal apparel orders do not recover in tandem, grey fabric price increases may encounter resistance, squeezing the weaving segment's profits. This upstream-downstream tug-of-war is particularly evident before the peak season—the current period is the preparation phase for the 'golden September and silver October' season, providing some demand support, but sustainability remains to be seen.
From a regional industrial cluster perspective, Wangjiangjing, as a distribution center for polyester filament in Jiangsu and Zhejiang, its price movements have a bellwether effect on downstream weaving clusters such as Shengze and Keqiao. This broad increase may trigger follow-on rises in surrounding markets, affecting the cost structure of fabrics across East China. Foreign trade enterprises need to be wary of the lagging impact of raw material price fluctuations on export quotations, especially those with many pending orders, which should lock in forward raw material costs as soon as possible.
Outlook and Operational Strategies
In summary, polyester filament prices are likely to maintain a firm tone in the short term. If upstream raw materials continue to strengthen, further price adjustments are possible. However, medium-term risks include: first, weaker-than-expected terminal demand recovery, hindering price pass-through; second, if raw material prices spike and then fall, polyester filament may face downward pressure. Therefore, market participants should closely monitor crude oil and PTA futures trends, as well as downstream operating rates.