The Logic Behind Polyester Staple Fiber Production Cuts: From Cost Games to Capacity Discipline

In July, spot prices of polyester staple fiber in East China peaked at 7,675 yuan per ton, but geopolitical premiums faded in August, weakening cost-side support. However, low inventories of PTA and MEG have formed a new floor for PSF—PTA social inventories are expected to hit a 44-month low, while MEG port inventories in East China have fallen to a 15-year low. This "divergent strength" in feedstock is reshaping the pricing logic of PSF.

Cost-Side Divergence and Support For PTA, delayed restarts of two key units and rainfall disruptions at East China ports pushed spot basis to nearly 300 yuan per ton, with August social inventories potentially dropping to a 44-month low. MEG, affected by Middle East tensions and strait navigation issues, saw reduced import arrivals, coupled with concentrated domestic maintenance, dragging port inventories to a 15-year low, with spot premiums reaching up to 540 yuan per ton in early August. Low inventories imply short-term cost resilience, but the impact of concentrated unit restarts in September should be monitored.

Supply-Demand Mismatch and Industry Losses Rising costs have not transmitted downstream due to supply-demand mismatch. In July, PSF operating rates reached 70.36%, with ample spot supply, while terminal textile orders saw limited growth, yarn mills held high finished inventories, and procurement remained just-in-time. The Keqiao Textile City, a key fabric trading hub, saw shrinking grey fabric transactions in August, low weaving utilization, and merchants buying on demand, with PSF-based fabrics trading in small lots. Price increases failed to pass downstream, squeezing processing margins and expanding industry losses.

Coordinated Production Cuts: Short-Term Support vs. Long-Term Game On August 15, major producers introduced a self-rescue plan, strictly controlling supply increments, postponing new capacity and restarts, and intensifying output reductions. Leading enterprises in Jiangsu, Zhejiang, and Fujian all participated, covering mainstream direct-spinning capacity. If cuts are effectively implemented, operating rates could fall to around 67%, reducing monthly supply by about 30,000 tons, tightening spot circulation and preventing deep price drops. However, execution flexibility remains—if prices rebound and margins recover, some enterprises may resume loads; new capacity is deferred, not canceled, and supply pressure will return once the industry turns profitable.

Verification Window for the September Peak Season Whether the traditional September peak season materializes depends on substantive improvements in downstream orders and restocking intentions. The Keqiao Textile City's transaction activity is a key indicator: if autumn/winter fabric orders release intensively, weaving-side restocking could boost PSF purchases; if new and repeat orders remain limited, supply-side contraction alone cannot sustain price strength. From late August to early September, production cuts may stabilize the market and repair margins; in mid-to-late September, the market will likely oscillate amid cost weakening and demand recovery expectations.

Practical Recommendations ### For Buyers - Consider moderate restocking in late August to early September, but control inventory levels to avoid risks from potential loosening of production cuts. - Monitor Keqiao grey fabric transactions and weaving utilization as leading indicators of demand. ### For Exporters - Lock in mid-to-long-term order costs during the margin repair window, but price in volatility from potential supply rebounds. - Track implementation of production cuts and PTA/MEG restart progress to adjust procurement strategies dynamically.