On August 4, 2026, the polyester staple fiber (PSF) market exhibited a rare price divergence: water treatment fiber balls (30-50mm diameter) remained stable at 15,500 CNY/ton in Zhengzhou, Henan, while cotton-type PSF (1.56dtex*38mm, melt direct spinning) was quoted at 7,370-7,450 CNY/ton in Wuxi, Jiangsu—a gap of more than double. This contrast reveals that PSF is no longer a single-price commodity but is segmented into distinct niches, each following its own supply-demand logic.
Background
Water treatment fiber balls are a value-added product derived from PSF, made into spherical filter media for sewage filtration and oil-water separation. Their prices have long stayed above 10,000 CNY/ton due to specialized processes (e.g., heat setting, surface treatment) and strict quality certifications, with a concentrated supplier base. Henan Kaijie, a major producer, serves as a benchmark; its price of 15,500 CNY/ton has remained unchanged for days, indicating balanced supply-demand and rigid downstream demand from water treatment projects, making the price insensitive to raw material fluctuations.
In contrast, cotton-type PSF is a basic textile raw material, mainly blended with cotton or viscose for apparel and home textile fabrics. Its quotes fluctuate between 7,370 and 7,450 CNY/ton, reflecting intense competition. Wuxi, a key distribution hub, shows price differences likely due to order volumes, payment terms, or logistics costs. The lower price may correspond to bulk purchases, while the higher one could be for small batches or urgent orders.
Industry Impact
The price divergence implies different negotiation strategies for downstream buyers. For water treatment firms, fiber ball prices are firm with limited negotiation room; they can reduce long-term costs by optimizing filter media replacement cycles. For textile enterprises, the low-price window for cotton-type PSF may be fleeting, as raw material PTA and MEG trends, plus the onset of autumn/winter fabric orders, could push prices up. Historically, August-September is the traditional peak stocking season, often lifting PSF prices.
Regional price gaps also merit attention. The Zhengzhou-Wuxi difference is not merely geographic but reflects product specifications and uses. Cross-regional buyers must factor in freight and lead times to avoid being misled by apparent low prices. Meanwhile, foreign trade firms should note that export quotes typically reference domestic mainstream prices; the current range of 7,370-7,450 CNY/ton leaves thin margins, and any RMB appreciation or freight hikes could erode profits.