On July 6, 2026, Rongsheng Petrochemical (including Shengyuan) reduced prices for certain polyester filament yarn grades by 100-200 yuan per ton. Semi-dull POY 75/36 was quoted at 8,100 yuan per ton, and 150/48 at 7,800 yuan per ton. Although the cut was moderate, it immediately widened spot market negotiation margins, prompting downstream weaving mills to adopt a wait-and-see approach, potentially extending procurement cycles.
Industrial logic behind the price cut
As one of the top three polyester filament producers in China, Rongsheng's pricing moves are closely watched. The fact that the cut was "partial" rather than across the board suggests the company is not facing a sudden inventory surge but is proactively stimulating orders. The narrowing spread between coarse and fine denier POY indicates a shift in end-use demand: coarse denier used in home textiles is weakening, while fine denier for apparel fabrics remains relatively supported.
The polyester staple fiber market is also under pressure. On July 3, 2026, the main contract for polyester staple fiber on the Zhengzhou Commodity Exchange closed at 6,810 yuan per ton, with open interest increasing by 12,741 lots. Rising open interest alongside a falling price signals growing bearish sentiment. Since filament and staple fiber belong to the same polyester category, a filament price cut often foreshadows lower downstream operating rates, further dampening staple fiber demand expectations.
Supply chain transmission and procurement strategy reassessment
- For weaving mills: lower POY prices directly reduce costs for textured yarn and grey fabrics. However, at the onset of a price cut, mills tend to wait for further declines rather than "buy the dip", exacerbating upstream inventory buildup and triggering a cycle of cuts, wait-and-see, and more cuts.
- For traders: wider spot negotiation margins encourage quick turnover and reduced stockpiling, which may boost short-term transaction volumes but lower the price floor.
- For polyester staple fiber: the sentiment spillover from filament cuts has already appeared in futures. If filament inventories continue to rise, staple fiber futures could break below the 6,700 yuan per ton support level.
Regional industrial cluster reactions
In concentrated chemical fiber clusters like Xiaoshan and Shaoxing in Zhejiang, smaller polyester producers may be forced to follow suit. However, Rongsheng's cost control is superior to the industry average, giving it more room to cut, while smaller mills may need to reduce prices more deeply. Grey fabric prices in weaving hubs like Shengze and Changxing will reflect this cost change within a week.