The July 21 Changshu polyester filament market quotations released a signal worth attention: FDY series prices rose across the board, with gains concentrated at 100-200 yuan/ton, accelerating from earlier increases, while several DTY grades saw no change and a few only inched up 50 yuan/ton. This divergence indicates that the upward momentum driven by raw material costs is transmitting unevenly to different product segments, and downstream weaving mills' willingness to accept higher prices is showing structural differences.
Dual Pressure from Costs and Inventories
From the raw material side, polyester feedstock prices have been volatile recently, with PX and PTA fluctuations failing to form a clear trend, injecting uncertainty into polyester filament factories' pricing decisions. The Changshu market saw FDY 150D/36F jump 200 yuan/ton in two days, the largest increase among all grades, directly reflecting factories' determination to support prices under high raw material costs. However, it is noteworthy that mainstream fine-denier varieties like FDY 68D/24F and 75D/36F only rose 100 yuan/ton, indicating that factories remain restrained under shipment pressure.
DTY grades performed more cautiously. 75D/36F prices remained completely unchanged, and 100D/36F only edged up 50 yuan/ton, contrasting sharply with FDY. Behind this lies the fact that DTY processing margins are already thin, and draw-texturing mill operating rates have not improved significantly, limiting their acceptance of high-priced feedstock. Industry public data shows that comprehensive weaving mill operating rates in the Jiangsu-Zhejiang region have declined by about 5 percentage points from the June peak, casting doubt on the sustainability of end-user orders.
Transmission Logic of Regional Industrial Clusters
As an important polyester filament distribution center and weaving cluster in China, Changshu's price movements often serve as a bellwether. The price gap between FDY and DTY this time actually reflects two different downstream demand structures: FDY mainly flows to water-jet looms producing conventional fabrics such as linings and pongee, which have seen a small amount of rigid demand restocking recently; DTY is mostly used in warp knitting and circular knitting sectors for fleece and elastic fabrics, which are more affected by fluctuations in foreign trade orders.
From the perspective of origin distribution, the pricing adjustments of leading companies such as Rongsheng Petrochemical, Tongkun Group, and Xinfengming are generally aligned, indicating that pricing power is strengthening as industry concentration rises. However, Tiansheng Petrochemical's single-day 200 yuan jump for FDY 150D/36F, deviating from the 100 yuan increase of other companies, may be an individual inventory strategy adjustment rather than an industry-wide trend.
Outlook: Adjustment Window Opening
Overall, the current polyester filament market is in a game stage of "cost-push" versus "demand resistance." If polyester feedstock remains high and volatile, polyester filament prices will still have short-term support, but the upside room has narrowed significantly. The more critical risk is that once feedstock prices correct, the downside elasticity of polyester filament prices may be greater than the upside elasticity, because weaving mills have already accumulated some raw material inventories, and their willingness to further restock is weakening.
For buyers, chasing FDY highs at this point carries increasing risk, especially for coarse-denier varieties above 150D, whose gains have already priced in some cost expectations. For DTY, some grades' price stagnation may offer a relatively safe procurement window, but close attention must be paid to changes in draw-texturing mill operations.