7,630 yuan per ton—that was the benchmark spot price for polyester staple fiber (PSF) in Jiangsu Province on July 23, 2026, up 50 yuan from the previous day. In what might seem like a quiet summer afternoon in the chemical fiber market, this jump sends a clear signal: elevated crude oil costs are transmitting downstream faster than expected, squeezing the profit margins of PSF producers to a critical point.
Cost-Driven Logic Reconfirmed
The direct driver of this price hike is the sustained high level of crude oil prices. Public data shows that international oil prices remained strong in late July, directly raising procurement costs for upstream feedstocks like PX and PTA. PSF, as an intermediate product in the polyester chain, is highly sensitive to cost changes—raw materials typically account for over 80% of its production cost. For every $1/barrel increase in crude oil, the theoretical cost floor for PSF rises by approximately 30-35 yuan per ton. The current spot price of 7,630 yuan represents a cumulative increase of over 1.7% from the 7,500 yuan range at the beginning of July, with the upward slope steepening.
More notably, the negotiation range in Jiangsu is between 7,600 and 7,700 yuan per ton, with the low end near 7,480 yuan. This price stratification indicates that cheaper lots are mostly from inventory or trader concessions, while mainstream mills have firmly anchored their offers above the 7,600 yuan line. This structure suggests that mills' bullish expectations are strengthening, and they are not eager to cut prices for volume.
Transmission Rhythm and Pressure
For downstream weaving mills, the direct impact of rising PSF prices is higher grey fabric costs. Taking 32s pure polyester yarn as an example, a 50 yuan increase in PSF adds about 60-70 yuan per ton to yarn costs. If crude oil remains elevated, PSF prices could break through 7,800 yuan in early August. This means mills still executing earlier low-price orders will face increasing margin erosion.
From a regional perspective, Jiangsu, as a major PSF production base, sets a benchmark for the entire market. The Nantong home textile cluster and the Shengze weaving cluster will be directly affected. Nantong, in particular, is entering its autumn-winter stocking season; price volatility may force buyers to lock in orders early or switch to alternative fibers.
Short-Term Outlook and Action Windows
Based on current crude oil fundamentals and polyester chain inventory levels, the Texcircle editorial team assesses that PSF prices will remain firm and likely rise further from late July through early August. The key variable remains crude oil: if Brent holds above $80/barrel, PSF could test the 7,800-7,900 yuan range; conversely, a pullback in oil would likely trigger a PSF decline, but with less magnitude than crude, as mills are inclined to support prices.
For downstream buyers, the current 7,600-7,700 yuan negotiation window may be a relatively manageable procurement period over the next two weeks. Once prices break 7,800 yuan, downstream resistance will intensify, potentially leading to a stalemate where prices are quoted but no deals are done.