Nylon Chain Extension: Hengyi's 400kt Melt Direct Spinning Project and Its Industry Signals

The value center of the nylon chain is shifting from chip feedstock to spinning and end-use applications. Hengyi Petrochemical's recent announcement of a 400,000-tonne PA6 melt direct spinning project, with an investment of 4.87 billion yuan and an 18-month construction period, scales up its self-developed direct spinning technology. Compared with conventional chip spinning, water consumption drops by 80% and electricity by 30%—figures that reveal not just a corporate cost sheet but a technological watershed for the entire PA6 processing route.

Background

The project will be implemented by Guangxi Hengyi New Materials and Hangzhou Yizhijin New Materials, located in the Guangxi New Materials Industrial Park and the Yizhijin New Materials Industrial Park, respectively. Notably, the Guangxi base's existing 600,000-tonne PA6 chip unit operated at full capacity throughout 2026, providing a solid feedstock hinterland for the direct spinning line. From chips to filament, Hengyi is filling a critical gap in its nylon chain, mirroring its polyester playbook of "crude oil-PX-PTA-polyester."

Policy and market drivers are making high-performance fibers an incremental track in a mature chemical fiber industry. PA6 melt direct spinning is not a new concept, but its commercial scalability has been limited by technological maturity and investment thresholds. Hengyi's use of internal funds plus external financing underscores its confidence in the route and may accelerate technology diffusion across the industry.

Industry Impact

From a cost structure perspective, the direct spinning process eliminates intermediate steps such as chip packaging, warehousing, and transport, compressing total costs and reducing pollutant and waste emissions. For buyers, this means more concentrated and stable supply of PA6 spun products, but it may also intensify regional competition in the short term—with both Guangxi and Hangzhou bases commissioning, nylon filament capacity in East and South China will expand simultaneously.

For upstream chip suppliers, Hengyi's vertical integration is a warning: when a major chip producer starts consuming its own chips for spinning, external chip sales will shrink, squeezing independent traders' pricing power. Downstream weaving and garment companies, however, may benefit from cost pass-through in fabric prices, especially for differentiated nylon products like high-tenacity and fine-denier items, where supply options will widen.

The regional landscape of the nylon chain is also shifting. Guangxi is emerging as a new growth pole for nylon new materials, leveraging energy and feedstock advantages; Hangzhou focuses on high-value-added development, backed by the Yangtze River Delta market and talent pool. The synergy of the two bases may redraw the domestic PA6 filament capacity map and exert substitution pressure on imported nylon filament.

Practical Recommendations

For Buyers - Monitor the project commissioning timeline (expected around 2028) and sign long-term supply agreements with Hengyi or its downstream partners in advance to hedge against price volatility before capacity release. - Compare product consistency between direct-spun and chip-spun products, especially in dyeing uniformity and tenacity, and establish your own acceptance criteria. - Leverage the cost benefits of direct spinning to renegotiate existing nylon fabric prices, with expected reductions of 3%-8%.

For Foreign Trade Companies - Assess the impact of the direct spinning project on export competitiveness of nylon filament; if cost advantages translate into pricing headroom, increase efforts to tap Southeast Asian and South Asian markets. - Optimize export routes using Guangxi's logistics corridors (e.g., the New Western Land-Sea Corridor) to reduce inland transport costs. - In overseas exhibitions and client communications, highlight supply chain integration for delivery stability as a differentiator.