Polyester Chain Offsets Acrylonitrile Plunge: Divergence Intensifies in Textile Raw Material Market

The strength of the polyester chain and the plunge in acrylonitrile defined the 27th week of 2026 in the textile raw material market. Data from a major commodity monitoring platform shows PTA rose 2.25% week-on-week to 5,910.50 yuan per ton, while polyester staple fiber gained 0.95% to 7,332.23 yuan per ton. However, acrylonitrile plummeted 4.20% to 9,133.33 yuan per ton, and polyester filament yarns FDY and DTY fell 1.68% and 1.28%, respectively. The overall textile sector posted a weekly average decline of 0.38%, continuing a pattern of more decliners than gainers.

Cost Pass-Through vs. Demand Weakness PTA's rise is not isolated. With a year-on-year increase of 21.80%, it reflects strong cost support from the upstream PX-naphtha chain. Yet the concurrent decline in polyester FDY (-1.68%) and DTY (-1.28%) signals that downstream weaving mills are struggling to absorb higher raw material costs. If fabric mill operating rates fail to pick up, polyester filament inventory pressure will force producers to cut prices, creating a "raw material up, finished product down" margin squeeze. Polyester staple fiber's more moderate gain (+0.95%) follows a different logic: its primary use in nonwovens and certain spinning segments benefits from seasonal restocking and steady export demand for protective materials, allowing better cost pass-through.

Acrylonitrile's Isolated Drop and Fiber Divergence Acrylonitrile's 4.20% weekly drop was the largest among all tracked items. Its year-on-year gain of 15.61% suggests this is a correction from high levels rather than a trend reversal. Still, such volatility directly impacts downstream acrylic fiber and ABS resin sectors. For textiles, whether acrylonitrile's decline translates into cost advantages for acrylic yarn depends on the recovery of orders for sweaters and carpets. Meanwhile, cotton yarn 32S and 21S inched up 0.61% and 0.28%, while raw cotton fell 0.92%. This divergence hints at squeezed margins for spinners—yarn price increases reflect mills' price support efforts rather than genuine demand expansion.

Nylon Chain Weakens: A Warning Signal Nylon FDY, DTY, and POY all declined, by 0.31%, 0.38%, and 0.92%, respectively. Nylon products are heavily used in outdoor apparel, sportswear, and high-end lingerie. The collective weakness may indicate that brands have become cautious in their nylon fabric procurement after the spring/summer replenishment cycle. With ongoing capacity expansion of caprolactam—the key nylon raw material—the profit distribution along the nylon chain may face further compression.

Practical Recommendations ### For Procurement Managers - Delay bulk orders for polyester filament until FDY/DTY prices stabilize, avoiding high-cost inventory during a period of weak cost pass-through. - For acrylonitrile, adopt a small-lot, high-frequency procurement strategy to lock in some Q2 needs at lower levels amid volatility. - Monitor the cotton-to-cotton-yarn spread; if spinning margins continue to shrink, consider basis contracts with mills to hedge price risk. ### For Exporters - Include 15-30 day price adjustment clauses in export quotes for PTA-linked products (polyester fabrics, yarns) to protect margins from raw material swings. - For nylon fabric export orders, add a price renegotiation trigger tied to raw material index movements, as falling nylon feedstock may lead customers to demand lower prices. - Explore export opportunities for acrylic yarn downstream of acrylonitrile; lower feedstock costs could boost Chinese acrylic products' competitiveness, especially in Southeast Asian markets.