Chemical Fiber and Cotton Price Divergence: Structural Differentiation Signals in Textile Raw Material Market

The textile commodity price data on July 8, 2026, reveals a noteworthy signal: the raw material market is not monolithic, with clear structural differentiation emerging within chemical fibers and between cotton and synthetics. The modest rise in polyester staple fiber and PTA stands in stark contrast to the sharp plunge in acrylonitrile and the decline in polyester FDY. This divergence is not accidental but a direct reflection of structural shifts in downstream demand.

Diverging Trends: A Tale of Two Extremes in the Chemical Fiber Chain

On the gainers' list, polyester staple fiber led with a 1.08% daily increase, reaching 7,346 yuan/ton, up 9.57% year-on-year. PTA followed with a 1.07% rise to 5,873 yuan/ton, showing a 19.11% YoY gain. Cotton inched up 0.07% to 17,917 yuan/ton, up 17.86% YoY. These varieties share the commonality of being mid-to-upstream in the industrial chain, with strong cost-side support.

However, the losers' list tells a different story. Acrylonitrile plunged 4.20% in a single day, falling sharply from 9,533 yuan/ton to 9,133 yuan/ton, despite a 15.61% YoY increase. Such a drastic daily drop is rare among textile raw materials. Polyester FDY fell 1.29% to 8,295 yuan/ton, narrowing its YoY gain to 14.98%. Raw silk edged down 0.07% to 425,700 yuan/ton, but has already fallen 10.07% YoY.

Acrylonitrile Plunge: Short-Term Stress Test for the Acrylic Chain

The 4.2% daily drop in acrylonitrile was the largest among all varieties. This is not an isolated event. Acrylonitrile is a key raw material for acrylic fiber and ABS resin, and such violent price movements often signal short-term imbalances in downstream demand or supply-demand dynamics. Despite the high YoY increase, the sharp daily decline suggests market sentiment or inventory pressure is rapidly releasing. For acrylic fiber producers, a sudden drop in raw material costs may improve margins in the short term but could also trigger customer wait-and-see behavior, delaying orders.

Polyester Staple Fiber vs. FDY: End-Order Structure Is Reshaping

Polyester staple fiber rose 1.08% while polyester FDY fell 1.29%, both belonging to the polyester family but serving different end uses. Staple fiber is mainly used for spinning and nonwovens, closely tied to cotton blending demand; FDY is used for weaving apparel and home textile fabrics. This divergence suggests that spinning demand (especially for blended yarns) remains relatively stable, while weaving demand (especially for apparel fabrics) may be weakening. Combined with flat prices for cotton yarn 21S and 32S, and no movement in viscose staple fiber and rayon yarn, the yarn market appears to be in a high-level stalemate, with downstream buyers cautious about high-priced raw materials.

Cotton vs. Chemical Fiber Price Ratio: Is the High Cotton Price Sustainable?

Cotton has risen 17.86% YoY, while polyester staple fiber is up 9.57% YoY, making cotton significantly more expensive. The widening cotton-polyester price gap theoretically encourages textile mills to increase polyester staple fiber usage and reduce cotton consumption. However, on the day, polyester staple fiber's gain (1.08%) far exceeded cotton's (0.07%), perhaps indicating the market is actively correcting this spread. If cotton prices remain high without downstream orders absorbing the cost, cotton mills may face a double squeeze of high costs and weak demand, eventually forcing a correction in cotton prices.

Raw Silk Down 10% YoY: A Weak External Demand Signal for the Silk Industry

Raw silk prices fell 10.07% YoY, the only variety with a negative YoY change, and the absolute price has dropped below 430,000 yuan/ton. As a high-end textile raw material, raw silk prices are highly dependent on export markets, especially the US, Europe, and Japan. A YoY decline of over 10% suggests sustained weakness in silk end-demand over the past year, possibly due to luxury consumption downgrades overseas or substitution by alternative fibers. For processing enterprises in silk-producing regions (e.g., Zhejiang, Jiangsu, Sichuan), while raw material costs have fallen, the recovery of end-orders remains uncertain.

Practical Recommendations

For Buyers - Polyester staple fiber and PTA are strong in the short term, but caution is advised for acrylonitrile-based products (acrylic fiber, ABS). Consider delaying purchases of acrylic raw materials to capture the cost-down window. - The cotton-polyester price gap is high. Prioritize evaluating the substitution ratio of polyester staple fiber in blended solutions to lock in cost advantages. - Raw silk prices are persistently low. Enterprises with high-end product lines can build strategic inventory at current levels, but control positions to avoid further downside.

For Foreign Trade Companies - The decline in polyester FDY may signal weakening external demand for apparel fabrics. Exporters should monitor order rhythms in Southeast Asia and South Asia to avoid inventory buildup. - After the acrylonitrile plunge, acrylic yarn export quotes may be adjusted downward. Use this opportunity to renegotiate long-term contract prices with overseas buyers. - Raw silk exporters should leverage low prices to explore emerging markets (e.g., Middle East, South America) to hedge against demand declines in traditional markets.