While the chemical fiber industry debates overcapacity, Hengyi Petrochemical has answered with a 4.87 billion yuan investment announcement: seek profit downstream and cost savings through process innovation. The plan, disclosed in mid-August, involves two subsidiaries—Guangxi Hengyi New Materials and Hangzhou Yizhijin New Materials—to build a 400,000-tonne annual PA6 melt direct spinning project with an 18-month construction period. This timeline suggests that by early 2028, the market will see 400,000 tonnes of nylon new material in filament form rather than traditional chips.
Background
The site selection is strategic. The Guangxi base houses Hengyi's existing 600,000-tonne PA6 chip capacity, which operated at full utilization in 2026, providing a stable raw material hinterland for melt direct spinning. The Hangzhou base, meanwhile, sits close to downstream consumer markets and R&D resources. The synergy allows the new 400,000-tonne project to consume chips locally, reducing logistics costs and eliminating steps like packaging, warehousing, and transshipment.
More noteworthy is the technology choice. Hengyi will fully adopt its self-developed PA6 melt direct spinning process, which cuts water use by 80% and electricity by 30% compared with the industry-standard batch chip spinning. These figures are not mere energy savings; they rewrite the cost structure of nylon spinning. In chip spinning, steps like chip cooling, packaging, and re-melting consume energy and add labor and depreciation. Melt direct spinning integrates polymerization and spinning continuously, eliminating intermediate physical transformations, potentially reducing per-ton filament costs by hundreds of yuan.
Industry Impact
The location of this 400,000-tonne new capacity is significant for the nylon chain. In recent years, PA6 chip capacity expanded rapidly, but matching downstream high-speed spinning capacity has been uneven. Hengyi's move builds a direct bridge between chips and spinning, digesting its own chip output while entering the nylon filament market at lower processing costs. For peers, this means fewer potential buyers for chips and intensified competition in spinning.
From an industry trend perspective, chemical fiber giants are pivoting toward high-performance fibers. PA6, as a dual-use material for engineering plastics and civilian filaments, sees demand tied to automotive lightweighting, electronics, and outdoor apparel. Hengyi's timing suggests confidence in downstream nylon demand. But caution is warranted: 400,000 tonnes is not small. If downstream demand growth underperforms, the project could pressure PA6 filament prices, squeezing trader margins.
For buyers, the most direct change is supply diversification. Previously, sourcing PA6 filament often relied on chip-spinning enterprises, where batch consistency and lead times depended on chip quality. Melt direct spinning products, due to continuous processes, typically offer better consistency, giving high-end fabric and industrial yarn customers new options. Meanwhile, cost reductions from energy-saving processes may transmit to yarn prices over time, offering pricing room for brands.