Polyester Staple Fiber Prices Diverge: Water Treatment Fiber Balls Stay High, Cotton-Type Spinning Grades Face Pressure

At the start of July, the polyester staple fiber market presented a stark contrast: water treatment fiber balls (30-50mm diameter) were quoted at 15,500 yuan/ton, while cotton-type melt-spun staple fiber (1.56dtex*38mm) ranged only from 6,960 to 7,250 yuan/ton, a spread exceeding 8,300 yuan/ton. This is not a statistical anomaly but a clear signal of structural divergence within the industry.

Background

According to industry public price data on July 1, 2026, the polyester staple fiber market showed a rare 'fire and ice' pattern. For water treatment fiber balls, Henan Kaijie Water Treatment Co., Ltd. reported a stable price of 15,500 yuan/ton for diameters of 30mm, 40mm, and 50mm, delivered in Zhengzhou, Henan Province. These products, mainly used in industrial wastewater filtration and circulating water treatment, have maintained high prices since the second half of 2025.

For cotton-type spinning grades, prices faced clear pressure. Zhejiang Tianchen Textile Supply Chain Co., Ltd. quoted 7,250 yuan/ton for Yida brand premium grade 1.56dtex*38mm melt-spun cotton-type staple fiber, delivered in Suqian, Jiangsu Province. Hebei Chujiao Supply Chain Management Co., Ltd. quoted 6,960 yuan/ton for Huahong brand same-specification product, delivered in Wuxi, Jiangsu Province. The 290 yuan/ton difference between the two origins reflects varying competitive pressures across regions and brands.

Industry Impact

This extreme price spread is not coincidental but a direct reflection of diverging prosperity across the supply chain. The high price of water treatment fiber balls is primarily driven by tightening environmental policies. Since 2025, stricter wastewater discharge standards in industrial parks across multiple provinces have spurred rigid demand for filtration media. Although the raw material is polyester staple fiber, the value-added processing (e.g., sintering, modification) significantly boosts its price.

In contrast, the 6,960-7,250 yuan/ton range for cotton-type spinning grades is approaching the cash cost line for some producers. While melt-spinning benefits from economies of scale, downstream yarn mills and fabric mills are cautious, maintaining only essential restocking amid weak final textile demand. Regionally, the 6,960 yuan/ton quote in Wuxi, 290 yuan lower than Suqian, suggests fiercer competition around Wuxi, with some traders possibly destocking at lower prices.

For upstream players, this divergence highlights the importance of production flexibility. Companies capable of allocating capacity to high-value-added segments like water treatment fiber balls enjoy significantly better margins than those focused solely on cotton-type spinning grades. For downstream buyers, the current low prices for cotton-type staple fiber may present an opportunity—if terminal orders recover in the traditional peak Q3 season, current prices could mark a cyclical bottom.

Practical Recommendations

For Buyers - Monitor the price gap between water treatment fiber balls and cotton-type staple fiber: if environmental policies persist, high prices for fiber balls may continue, but watch for substitution risk from PP fiber balls; cotton-type grades are at a year-to-date low, consider locking in Q3 volumes in tranches by end-July. - Exploit regional price spreads: Jiangsu offers lower cotton-type prices than Henan, but factor in freight and payment terms; if the spread between Suqian and Wuxi exceeds 300 yuan, prioritize the cheaper source.

For Exporters - Keep export quotes for cotton-type polyester staple fiber flexible: Southeast Asian demand remains sluggish; the domestic price of 6,960-7,250 yuan/ton (roughly 960-1,000 USD/ton) is already below some Southeast Asian suppliers, potentially opening an export window, but hedge against currency fluctuations. - Target Middle East and African markets for water treatment fiber balls: industrial water treatment infrastructure is accelerating in these regions, and the 15,500 yuan/ton domestic price remains competitive internationally; quote on FOB basis to avoid inland transport risks.