Polyester Staple Up 0.64% Weekly: Textile Raw Material Divergence Widens Year-on-Year

Polyester staple fiber is up 35.44% year-on-year, a figure that deserves more attention from mill procurement teams than the modest 0.64% weekly gain. In week 39 of 2026 (September 28 to October 2), textile commodities moved just 0.07% on average, but beneath that calm surface, synthetic and natural fiber chains are tracing two different curves.

Structural Signals in the Weekly Data

According to China Customs and industry public data, polyester staple started the week at 8,635.08 yuan per ton and ended at 8,690.58 yuan, while PTA rose from 7,293.50 to 7,327.25 yuan per ton. Those gains of 0.64% and 0.46% look mild, yet year-on-year they reach 35.44% and 59.46% respectively. The cost center of the polyester chain has been lifted substantially over the past year, while downstream yarn segments have not kept pace.

Cotton yarn 32S and 21S edged up only 0.20% and 0.14%. Polyester yarn, viscose staple, spandex, rayon yarn, and polyester POY, DTY and FDY were all flat. Nylon DTY, FDY and POY also posted zero weekly change. Stagnant prices do not signal strong demand; they reflect a standoff between upstream and downstream.

Only two items declined: acrylonitrile fell 0.46% and cotton slipped 0.07%. Acrylonitrile remains up 35.07% year-on-year, suggesting the pullback is high-level oscillation rather than a trend reversal. Cotton is up 16.92% year-on-year, but weekly weakness hints at supply pressure from the new crop season.

Raw silk is the most intriguing item. It closed at 445,500 yuan per ton, up 0.20% weekly but down 4.65% year-on-year, making it one of the few textile categories in negative territory. The price ratio between natural and synthetic fibers is shifting, with direct implications for blended product formulas and procurement strategies.

Transmission and Divergence Across Industrial Clusters

From an industrial cluster perspective, polyester plants in Jiangsu and Zhejiang have not fully passed cost pressure downstream. A near-60% year-on-year rise in PTA should theoretically push polyester filament and staple quotes much higher, yet weekly gains were compressed below 1%. This shows weak bargaining power among midstream yarn and weaving players, with margins squeezed between polyester and end markets.

For fabric clusters such as Keqiao and Shengze, high-level raw material prices mean grey fabric quotes are hard to cut significantly, while apparel brands show limited acceptance. Order negotiations may lengthen. The Nantong home textile sector is highly sensitive to polyester staple and cotton yarn; if raw materials stay elevated, autumn and winter order margins will narrow further.

Export impacts are more complex. Sharp year-on-year gains in PTA and polyester staple raise the quotation base for Chinese synthetic fabric exports, while Southeast Asian competitors have different cost structures. Some low-to-mid-end orders may accelerate their migration. Meanwhile, weaker raw silk offers a cost advantage for silk exporters, though soft international demand limits the upside.

The high-level pullback in acrylonitrile bears watching. As a key raw material for acrylic fiber and ABS, sustained softening would ease cost pressure on related yarns and fabrics. But a 35.07% year-on-year gain indicates prices remain historically elevated, and buyers should not bet on a downtrend too early.

Practical Recommendations

For Buyers - With polyester staple and PTA at year-on-year highs, keep price-locking ratios moderate and avoid building long positions near peak levels. - Raw silk is negative year-on-year; silk product lines can moderately increase natural fiber blends to optimize cost structure. - Cotton dipped weekly but remains high year-on-year; during the new crop season, consider phased procurement rather than concentrated restocking.

For Mills - Yarn segments show weak pass-through; prioritize high-value-added orders and reduce capacity allocated to low-margin conventional varieties. - The acrylonitrile pullback is not yet a trend; keep acrylic fiber raw material inventories neutral and avoid high-level stockpiling. - Nylon prices are flat; use this stable window to negotiate longer payment terms or volume discounts with suppliers.

For Exporters - With synthetic fabric quotation bases rising year-on-year, discuss price adjustment mechanisms with European and American clients early to reduce dual risks from currency and raw materials. - Weaker raw silk costs can translate into quotation flexibility for silk exports, but beware of price pressure from insufficient international demand. - As Southeast Asian competition intensifies, accelerate the shift from low-end orders toward differentiated and functional fabrics to reduce pure price competition.