Nylon Chain Jumps 4.37% in a Day: New Signals in Chemical Fiber Market Amid Cost and Inventory Game

The price monitoring data on September 8 sends a noteworthy signal: the three nylon chain products—POY, FDY, and DTY—surged 4.37%, 3.18%, and 3.06% respectively in a single day, an uncommon move in the chemical fiber market over the past two years. Meanwhile, upstream raw material acrylonitrile fell 2.31%, creating a sharp directional divergence within the same chain, suggesting that this nylon rally is not purely cost-push but involves supply-side and inventory dynamics.

Background

According to the data, nylon POY jumped from 14,875 yuan/ton to 15,525 yuan/ton, with a year-on-year gain of 28.84%; nylon DTY rose 22.35% and FDY 19.63% year-on-year. Notably, PTA climbed 2.52% on the day, with a year-on-year surge of 39.97%, the highest among monitored products. Polyester staple fiber rose only 0.50% but was still 27.98% higher year-on-year. This indicates the entire chemical fiber sector is at elevated levels, and the nylon chain's surge is not an isolated event.

The drop in acrylonitrile is particularly striking. As a key raw material for nylon, it fell 2.31% to 10,583 yuan/ton, though still up 30.39% year-on-year. The combination of falling raw material and rising finished goods typically points to two scenarios: first, nylon mills are still digesting lower-cost feedstocks purchased earlier, expanding margins; second, downstream weaving and end-users have suddenly increased purchasing intentions, allowing mills to raise prices. Given the synchronized rise in nylon POY, FDY, and DTY, the latter seems more plausible, indicating low channel inventories and restocking demand.

Industry Impact

For buyers, the nylon chain surge means a significant short-term cost increase. Nylon POY rose 650 yuan per ton in a single day; for a 100-ton order, the daily cost difference exceeds 60,000 yuan. More critically, the nearly 30% year-on-year gain has altered the price ratio between nylon and polyester—polyester POY remained flat at 9,080 yuan/ton, up 28.68% year-on-year, but its absolute price remains far lower than nylon, potentially accelerating substitution in non-critical applications.

For upstream acrylonitrile producers, the current price dip may be temporary. A year-on-year gain of over 30% suggests the supply-demand fundamentals have not reversed, and the strength in the nylon chain could support acrylonitrile prices stabilizing within one to two weeks. For PTA and polyester staple fiber, year-on-year gains of 39.97% and 27.98% have severely squeezed downstream weaving mills' profits; if raw material prices remain high, some small and medium factories may reduce output or delay orders. The slight declines in viscose staple fiber (-0.14%) and cotton (-0.04%) reflect weak follow-through in natural and regenerated fibers, with funds clearly concentrating on leading chemical fiber varieties.

Practical Recommendations

For Buyers - If nylon raw material inventory is below two weeks of usage, consider locking in partial orders within 3-5 days in batches to avoid chasing highs; monitor acrylonitrile prices—if they continue to fall, wait for a pullback window after cost transmission. - For non-critical applications, re-evaluate substitution with polyester filament or staple fiber; polyester FDY's year-on-year gain is slightly lower than nylon FDY, and the absolute price gap is clear.

For Mills - Nylon mills should capitalize on the current margin expansion (falling raw materials, rising finished goods) to accelerate digestion of high-cost inventory and appropriately raise ex-factory prices to pass through costs. - Polyester and viscose mills need to be wary of order loss due to high raw material costs; suggest implementing price linkage clauses with downstream clients to mitigate unilateral risk.

For Exporters - Prioritize production of existing nylon orders to avoid margin erosion from rising raw material costs; add short-term price adjustment clauses in quotations. - Monitor exchange rate and logistics changes; with high year-on-year gains in chemical fiber categories, overseas clients are price-sensitive—offer blended or downgraded specifications as options.