Polyester Filament Price Eases: Rongsheng Petrochemical's Quotation Cut and the Polyester Chain Ripple

The fragile equilibrium of the polyester industrial chain is being disrupted. In early July 2026, Rongsheng Petrochemical (including Shengyuan Petrochemical) announced a reduction in its polyester FDY quotations for certain specifications, ranging from 100 to 200 yuan per ton. This move is not an isolated price fluctuation but an inevitable result of the combined pressure from upstream cost pass-through and downstream demand contraction.

Background

The price adjustment covers several mainstream polyester FDY specifications, including 30D/24F, 75D/36F, and 150D/96F, with adjusted quotations ranging from 8,300 to 10,950 yuan per ton. Among them, 150D/96F is quoted at 8,300 yuan/ton, 200D/48F at 8,450 yuan/ton, and 300D/96F at 8,400 yuan/ton. As a leading domestic producer of polyester filament, Rongsheng's quotation changes often serve as a market bellwether.

According to publicly available industry data, polyester FDY spot prices had been under pressure for several consecutive weeks. This partial reduction indicates a further downward shift in the negotiation center. In the polyester sector's multi-bearish scoring system, polyester FDY is marked at -1, indicating a general bearish sentiment, while polyester staple fiber is rated -0.5 due to sentiment spillover, showing that the bearish effect is spreading across categories.

Industry Impact

For weaving enterprises, the easing of raw material prices may seem beneficial for cost control in the short term, but it conceals deeper market signals. A price cut in polyester filament often implies insufficient downstream orders, with inventory pressure pushing back upstream. If operating rates in chemical fiber weaving clusters such as Shengze and Changxing also weaken, it will further confirm the sluggish demand.

From a futures market perspective, the reduction in polyester FDY spot quotations simultaneously pressures related futures contracts. The polyester chain futures are highly correlated; a decline in filament prices can drag down futures expectations for upstream raw materials like PTA and MEG, forming a negative feedback loop. This poses a direct risk for companies holding long futures positions.

The impact on polyester staple fiber is more indirect but still significant. Although staple fiber and filament differ in downstream applications, both belong to the polyester fiber category, and market sentiment can quickly spread. Buyers in the staple fiber segment should also be alert to the risk of price declines, especially in the current weak polyester sector environment.

Practical Recommendations

For Buyers - Slow down the pace of filament purchases to avoid accumulating high-priced inventory during a downward price channel; consider batch procurement to lock in some lower prices. - Closely monitor Rongsheng's subsequent quotation adjustments and peer follow-ups; if consecutive reductions occur, consider restocking after prices stabilize.

For Foreign Trade Enterprises - Build a price fluctuation buffer into export quotations to avoid losses on foreign sales contracts due to rapid domestic raw material price declines. - Monitor the combined risks of exchange rate and raw material price volatility; include price adjustment clauses in medium- to long-term orders to hedge against raw material cost uncertainty.