Cost-side pressure has been building for two consecutive weeks, and nylon filament prices are now being driven by raw materials. During the week of August 24-30, nylon filament quotes in Shengze and Jiaxing generally moved up, with the 70D/24F nylon 6 FDY emerging as the bellwether, rising to 14800-14900 yuan/ton with notably higher trading volumes. This rally is not a sudden demand surge but a result of synchronized increases in caprolactam and nylon 6 chip prices—the former reaching 13100-13200 yuan/ton with a weekly gain of 500-600 yuan/ton, and the latter following to 13500-13600 yuan/ton.
Background Signals of raw material increases actually appeared a week earlier, and this week the impact finally transmitted to filament prices. Caprolactam, the key upstream material in the nylon chain, typically leads price moves for chips and spinning. A weekly jump of 500-600 yuan/ton is substantial compared with the past six months, directly lifting the cost support for nylon 6 chips. As chip prices rose, spinning mills faced higher cost pressure and had to pass it on by raising filament prices. However, not all specifications moved in tandem: the 70D/24F saw both volume and price gains due to strong downstream demand, while regular specs like 100D/36F, 140D/48F, and 210D/36F traded flat with limited price increases.
This divergence indicates that the current rally is cost-driven rather than a broad demand recovery. The 70D/24F is favored because it feeds water-jet looms producing nylon taffeta, nylon-polyester blends, and taslan for domestic apparel, which have seen a pickup in orders. In contrast, 210D/36F used in polyester-nylon oxford fabric has steady but not exciting demand, limiting its upside.
Industry Impact Downstream, export-oriented autumn/winter orders have started to trickle in, and domestic sportswear fabric demand is stirring, providing marginal improvement for nylon filament consumption. But raw material prices are nearing short-term highs, and further upside may be capped. For weaving mills, rising input costs are squeezing margins, especially for those focused on standard specs with limited pricing power.
For traders and buyers, inventory management requires more caution now. On one hand, cost support makes sharp declines unlikely; on the other hand, if end-order momentum fails to sustain, prices could correct. Indeed, the sluggish trading of some regular specs this week already hints at buyer hesitation. Looking ahead, transaction volumes may continue to expand, but the pace of price increases will likely slow, with a generally firm-to-higher bias.