In early July, a noteworthy signal emerged in the polyester chain: Rongsheng Petrochemical (including Shengyuan) reduced spot prices for polyester FDY by 100 to 200 CNY per ton across multiple specifications, from 30D/24F to 300D/96F, with adjusted quotes ranging from 8,300 to 10,950 CNY/ton. Although a localized price adjustment, this move triggered a chain reaction within the polyester sector, simultaneously pressuring polyester staple fiber market sentiment.
Immediate Drivers of Price Easing
The most direct driver behind the FDY price cut is upstream raw material costs. PTA and MEG prices have been weakening recently, significantly reducing cost support for polyester filament. As an industry leader, Rongsheng's pricing action is often seen as a proactive correction to market supply-demand balance. The narrowing spread between fine denier (e.g., 30D/24F) and coarse denier (e.g., 300D/96F) yarns suggests downstream weaving mills' acceptance of high-value-added product premiums is declining.
Another critical factor is inventory pressure. Industry data shows that social inventories of polyester filament climbed to a three-month high by late June, with production-sales ratios at some major plants falling below 70%. Against a backdrop of no significant recovery in downstream textile and garment orders, destocking through price cuts has become a rational choice. Rongsheng's adjustment is essentially a passive response to real market demand.
Chain Transmission: From Filament to Staple Fiber, Spot to Futures
The impact of the FDY price cut does not stop at filament itself. Since both products belong to the polyester fiber category, market sentiment for polyester staple fiber has correspondingly weakened. The logic is that lower filament prices drag down the overall valuation floor of the polyester sector, thereby suppressing the comparative pricing advantage of staple fiber. In the futures market, multi-short scores for relevant varieties have given clear signals: -1 for FDY and -0.5 for staple fiber, indicating capital's cautious stance on short-term trends.
More notably, such price cuts may establish a "price anchor." Once a leading factory actively lowers quotes, other polyester plants are likely to follow suit to maintain market share. This will accelerate the downward shift of the polyester chain's price center over the next two weeks, directly disrupting the procurement rhythm of downstream weaving and dyeing sectors. Buyers may shift to a "hand-to-mouth" purchasing strategy, further squeezing plant cash flow turnover.
Regional and Industrial Cluster Impact
From a regional perspective, Rongsheng's capacity is mainly concentrated in Xiaoshan, Ningbo (Zhejiang), and Dalian (Liaoning). Its price adjustment has benchmark significance for pricing systems in East China's polyester clusters (e.g., Shaoxing, Xiaoshan, Wujiang). These regions house approximately 60% of the nation's polyester filament capacity. Price fluctuations will rapidly transmit to fabric markets like Shengze and Keqiao. For water-jet weaving clusters heavily reliant on polyester FDY, every 100 CNY/ton drop in raw material costs reduces cost per 10,000 meters of grey fabric by about 300 CNY, offering some margin relief but potentially intensifying price competition for finished grey fabrics.