In early July 2026, a key price adjustment signal emerged in the polyester industry chain. Rongsheng Petrochemical (including Shengyuan) announced partial price cuts for its polyester filament FDY series, ranging from 100 to 200 CNY per ton across multiple mainstream specifications from 30D/24F to 300D/96F. Specifically, semi-dull FDY 75D/36F was quoted at 8,500 CNY/ton, 150D/96F at 8,300 CNY/ton, while the finer denier 30D/24F was priced at 10,950 CNY/ton. This move is not an isolated event but a concentrated reflection of the accumulating contradictions between supply and demand in the polyester sector.
Supply-Demand Dynamics Behind the Price Cut
Rongsheng's price adjustment directly reflects two core contradictions in the current polyester filament market: continuous capacity expansion upstream and weak purchasing willingness downstream. According to industry public data, domestic polyester filament capacity increased by over 2 million tons in the first half of 2026, mainly concentrated among leading enterprises, intensifying market supply pressure. Meanwhile, the growth rate of terminal textile and apparel exports has slowed, and the domestic market has shown no significant improvement. Weaving enterprises generally adopt a just-in-time purchasing strategy, avoiding large-scale stockpiling. Against this backdrop, leading companies cutting prices first is both a bid for market share and a reluctant move to destock.
From a product structure perspective, the price cuts cover multiple specifications from fine to coarse denier, but the decline and quote levels vary significantly across varieties. Fine denier FDY 30D/24F remains above 10,900 CNY/ton, while coarse denier varieties like 150D/96F have fallen below 8,400 CNY/ton, reflecting stronger price support for fine denier products due to higher technical barriers. However, overall, although the price cut is not drastic, it is enough to shift market expectations—the spot bargaining center has shifted downward, and buyer wait-and-see sentiment has intensified.
Chain Reaction and Transmission Effects
As an intermediate link in the polyester chain, price fluctuations in polyester filament quickly transmit to upstream PTA, MEG, and downstream products like polyester staple fiber and grey fabric. Following the price cut announcement, market sentiment in the polyester sector weakened noticeably, with polyester staple fiber prices also indirectly pressured, and related futures contracts under downward pressure. According to industry scoring models, the long-short rating for polyester FDY is -1, and for polyester staple fiber is -0.5, indicating a generally cautious to bearish market outlook in the short term.
From a regional industrial belt perspective, weaving enterprises in major polyester filament consumption areas like Xiaoshan, Shaoxing in Zhejiang, and Shengze in Jiangsu have seen a slight decline in operating rates. Some small and medium-sized weaving factories report that while lower raw material costs reduce expenses, they also imply further compression of order prices, leaving profit margins unchanged. For traders, the current downward price channel increases inventory risks, with most opting for quick turnover and maintaining low inventory levels.
Turning Point Judgment for Price Expectations
In the short term, polyester filament prices are likely to remain under pressure. On one hand, Rongsheng's price adjustment as an industry leader often has a demonstration effect, and other polyester plants may follow suit, triggering a price decline cycle. On the other hand, July and August are traditionally off-seasons for textiles, with weak demand support and slower inventory digestion. However, historically, when prices fall below the cost lines of some small and medium enterprises, production cuts and maintenance activities increase, which will curb supply to some extent and provide a bottom for prices.
In the medium to long term, this price cut may accelerate industry consolidation. Leading companies with cost advantages and scale effects can withstand longer profit compression, while smaller enterprises lacking differentiated products will face greater survival pressure. For downstream buyers, the current period offers a relatively favorable bargaining window, but they should be cautious about further price declines.