Acrylonitrile Leads Chemical Fiber Chain: Supply-Demand Rebalancing Behind August Raw Material Shifts

On August 3, 2026, the textile commodity price list sent a telling signal: acrylonitrile jumped 2.69% in a single day, with a year-on-year surge of 44.42%, while polyester staple fiber slipped 0.06%. This divergence between raw materials and finished goods suggests that cost pass-through is meeting downstream resistance, and buyers should be wary of squeezed margins.

Background

According to public industry data, among 16 monitored textile commodities on August 3, only three rose, one fell, and the rest were flat. Acrylonitrile led the gainers at 11,433.33 yuan/ton, followed by PTA at 6,027 yuan/ton (up 1.37%), and raw silk inching up 0.07% to 425,100 yuan/ton. Notably, acrylonitrile and PTA posted year-on-year gains of 44.42% and 25.01%, respectively, far exceeding other items, indicating sustained upward pressure on upstream raw materials.

Meanwhile, polyester staple fiber was the only decliner, down 0.06% to 7,560.58 yuan/ton. Polyester filament series (POY, DTY, FDY) remained flat, with year-on-year increases ranging from 17% to 24%. Cotton yarn, viscose staple fiber, and spandex held steady, but year-on-year changes varied widely: spandex rose 22.34%, while raw silk fell 9.39%, reflecting divergent supply-demand dynamics across fiber categories.

Industry Impact

The strong rise in acrylonitrile is primarily driven by cost support from upstream feedstocks (propylene, ammonia) and tight supply due to plant maintenance. However, downstream demand for acrylic fiber and ABS resin has not expanded correspondingly, indicating a cost-push rather than demand-pull rally. For textile mills, high acrylonitrile prices will directly raise production costs for acrylic yarn; without commensurate order volumes, profit margins will be squeezed.

PTA's gain is linked to crude oil fluctuations and tight PX supply. As a key raw material for polyester filament, PTA price hikes would normally pass through to polyester products, but on August 3, POY, DTY, and FDY prices were flat, and staple fiber even dipped slightly. This suggests weak buying interest from weavers and apparel makers, hindering price transmission. Such a pattern typically compresses processing margins for polyester plants, potentially leading to production cuts to balance supply and demand.

For the cotton textile chain, cotton and cotton yarn prices were stable, with moderate year-on-year gains (cotton +14.20%, yarn +5% or so), indicating a relatively calm cotton market. Raw silk, down 9.39% year-on-year, is the most notable decliner, possibly due to increased cocoon supply or weak demand for silk fabrics. Overall, the price gap between chemical fibers and natural fibers is widening, which may shift some orders from synthetic to natural materials like cotton or silk. Buyers should monitor substitution effects.

Practical Recommendations

For Buyers - Closely track acrylonitrile and PTA futures/spot prices; if they continue to climb, consider locking in orders for acrylic and polyester raw materials to hedge against rising costs. - Compare price gaps between chemical and natural fibers; where order specifications allow, evaluate switching to cotton yarn or viscose staple fiber to balance cost and performance. - Watch for production cuts among polyester filament mills; if processing margins remain thin, reduced supply may lift prices later, so consider building moderate safety stock.

For Exporters - Include raw material price adjustment clauses in contracts to protect against currency fluctuations and input cost inflation, especially for acrylic and polyester products. - Use forward FX and commodity hedging tools to mitigate price volatility of acrylonitrile and PTA, stabilizing export quotations. - For items like raw silk with year-on-year declines, negotiate harder for favorable supplier terms to enhance export competitiveness.