On July 23, 2026, Rongsheng Petrochemical, a major polyester producer in China, raised its ex-factory prices for polyester filament yarn (PFY) across multiple specifications. Semi-dull FDY 30D/24F was quoted at 11,250 yuan/ton, 75D/36F at 9,050 yuan/ton, 150D/96F at 8,750 yuan/ton, 200D/48F at 8,850 yuan/ton, 200D/96F at 8,800 yuan/ton, and 300D/96F at 8,800 yuan/ton. Black yarn 150D/48F was priced at 9,200 yuan/ton, and 300D/96F at 9,400 yuan/ton. This price adjustment is not an isolated event but a reflection of the recent strength in the polyester supply chain.
Cost and Sentiment Resonance Upstream, prices of PTA and MEG have been trending higher, providing cost support for PFY. Rongsheng's move effectively passes upstream cost pressure downstream while leveraging its market position to guide spot market expectations. For buyers, especially weaving mills heavily reliant on FDY, this means an immediate increase in raw material costs.
The polyester staple fiber (PSF) market also felt the ripple effect. On July 22, 2026, the main PSF futures contract (2609) closed at 7,478 yuan/ton, up 102 yuan/ton from the previous day, with both volume and open interest rising. The bullish performance in futures reinforces the overall positive sentiment in the polyester sector, suggesting the market expects prices to stay elevated rather than merely fluctuate.
Transmission Effects Downstream PFY is a core raw material for weaving, so price changes directly impact greige fabric costs and fabric quotations. This adjustment covers a wide range from fine to coarse denier and from regular semi-dull to black yarn, affecting a broad user base. For water-jet weaving clusters in Wujiang, Jiangsu, and Changxing, Zhejiang, raw material costs face immediate upward pressure.
Historically, price moves by leading companies often trigger follow-up actions by other polyester mills, leading to a collective price hike. This means downstream weavers face not just a single supplier's price change but an overall upward shift in raw material costs. For fabric traders and apparel brands with orders already booked but raw material costs not locked, profit margins will be squeezed.
Procurement and Inventory Challenges In the current price upcycle, downstream companies must adjust their procurement strategies. While increasing inventory might lock in lower costs if prices continue to rise, it also carries the risk of high inventory if end-user demand fails to pick up.
The sustainability of this PFY price rally hinges on supply-demand fundamentals. While upstream producers are pushing prices due to cost pressures, whether downstream weaving mills can maintain high operating rates is key. If apparel orders do not grow significantly, weavers may cut production to cope with higher costs, which would dampen raw material demand and eventually lead to price corrections.