On July 27, Rongsheng Petrochemical (including Shengyuan) cut the ex-factory price of polyester filament yarn FDY by CNY 100/ton. The semi-dull FDY 150/96 was quoted at CNY 8,800/ton, and the 300/96 specification also dropped to the same level. This move is not an isolated incident but a direct reflection of the current supply-demand imbalance in the polyester chain.
The Demand Reality Behind the Price Adjustment
The price reduction covers multiple mainstream specifications from 30D to 300D, all with a uniform cut of CNY 100/ton. Such a comprehensive, equal-rate adjustment indicates a holistic sales strategy rather than a targeted inventory clearance for specific items. Industry data shows that FDY 150/96 has accumulated a decline of over CNY 300/ton from its previous peak, and this latest cut further confirms the weak trend.
Notably, within the same pricing system, fine-denier specifications (e.g., 30D/24F) remain at a high of CNY 11,250/ton, widening the price gap with coarse-denier varieties to nearly CNY 2,500/ton. This suggests a clear structural divergence in downstream demand: light-weight fabric orders still support fine-denier yarn prices, while demand for coarse-denier yarns in conventional weaving and home textiles has contracted more significantly.
Sentiment Transmission Within the Polyester Sector
As a key mid-stream product in the polyester chain, FDY price movements often generate sentiment spillover to other products in the sector. This cut exerts direct negative pressure on polyester staple fiber (PSF). Earlier, on July 22, the main PSF futures contract (2609) on the Zhengzhou Commodity Exchange closed at CNY 7,478/ton, up CNY 102/ton from the previous session, showing a short-term bullish trend. However, after the FDY price cut news, the spot PSF market saw significantly increased wait-and-see sentiment, with some traders halting their chasing purchases.
The logic behind this transmission is that FDY and PSF share the same upstream raw materials—PTA and MEG—making their cost bases highly overlapping. When FDY actively cuts prices due to weak demand, the market expects overall polyester operating rates to decline, leading to reduced raw material procurement and ultimately weakening cost support for PSF. However, the end-use applications differ significantly—FDY is mainly used in woven apparel fabrics, while PSF is more for nonwovens and fillings—meaning the transmission is more about market sentiment than a fundamental supply-demand reversal.
Intensifying Game Between Upstream and Downstream
The core contradiction in the current polyester segment is: upstream PTA capacity continues to expand, keeping prices low, while downstream weaving mills' order recovery falls short of expectations. According to China Customs data, the growth rate of textile and apparel exports in the first half of 2026 slowed by about 3 percentage points year-on-year, with weak end-consumer demand transmitting to the mid-stream polyester sector.
Rongsheng's price cut is essentially a proactive concession under inventory pressure. On one hand, polyester plants maintain high operating rates with limited supply-side flexibility; on the other hand, downstream weaving mills tend to adopt a 'buy on rising, not falling' mentality during price downturns, slowing procurement and pushing polyester plant inventory days higher. Industry estimates show that as of late July, FDY inventory at major polyester plants had risen to 15-18 days, above the industry safety stock level.
Practical Implications for Buyers and Exporters
For Buyers - Current FDY prices are still in a downward channel. Adopt a 'batch purchasing, on-demand procurement' strategy to avoid large one-time stockpiles that could lead to inventory depreciation. - Monitor the price spread between fine-denier and coarse-denier specifications. If the spread continues to widen, consider increasing the proportion of coarse-denier purchases to leverage structural price differences for cost reduction. - Negotiate short-term price protection agreements with suppliers, requiring compensation for price drops within 7 days of order placement to hedge against decline risks.
For Exporters - Include polyester raw material prices as floating clauses in overseas order quotes. Agree that when FDY spot prices fluctuate by more than 5%, order prices can be adjusted accordingly. - Monitor capacity developments in Southeast Asia. Recently, polyester capacity in Vietnam and Indonesia has come online, potentially further depressing international market prices. Leave room for profit margins in export quotes. - Utilize futures tools (such as the ZCE polyester staple fiber futures) for hedging to lock in raw material costs and avoid spot price fluctuation risks.
Overall, Rongsheng's price cut is not an isolated event but a signal that the polyester chain is shifting from 'cost-driven' to 'demand-driven' dynamics. Until end-consumer demand genuinely recovers, FDY prices will continue to face downward pressure, and all links in the chain need to reassess inventory management and pricing strategies.