The profit center in the chemical fiber industry is shifting from selling raw materials to selling processing. Hengyi Petrochemical's latest announcement reveals plans to invest 4.87 billion yuan through two subsidiaries, Guangxi Hengyi New Materials and Hangzhou Yizhijin New Materials, to build a 400,000-tonne PA6 melt direct spinning project with an 18-month construction period. Behind this figure lies a clear bet on the value chain of nylon: when chip capacity oversupplies and spreads narrow, moving downstream to spinning becomes an inevitable choice.
Background
This project is not an isolated move. Hengyi's subsidiary Guangxi Hengyi New Materials currently operates a 600,000-tonne PA6 chip plant, running at full capacity in 2026. Adding 400,000 tonnes of melt direct spinning capacity means the company will internally consume more than half of its chip output, converting it directly into filament products. From an industry perspective, this is not just capacity expansion but a business model reconstruction—transforming from a bulk raw material supplier to a differentiated fiber manufacturer.
The choice of technology reveals the core logic of cost control. Hengyi's self-developed PA6 melt direct spinning process reduces water consumption by about 80% and electricity by 30% compared to traditional batch chip spinning, while eliminating intermediate steps like chip packaging, warehousing, and transport. What do these numbers mean for buyers? The cost per tonne of PA6 filament could drop by hundreds of yuan, which is enough to shift order flows in the current competitive nylon price environment.
Industry Impact
Melt direct spinning is not new, but large-scale commercialization has been limited by technical stability and product consistency. Hengyi's 400,000-tonne project signals to the industry that the process is now commercially mature. For small and medium chip spinning enterprises, this constitutes a technological barrier—they cannot replicate Hengyi's integrated raw material support and will fall further behind on the cost curve.
Geographically, the project spans Guangxi and Hangzhou, forming a north-south complement. The Guangxi base is close to upstream raw materials and energy advantages, while the Hangzhou base sits near downstream weaving and consumer markets. This dual-point layout helps shorten logistics distances, reduce transportation costs, and diversify site risks. For surrounding textile clusters, stable local supply of PA6 filament will reduce reliance on long-distance procurement and improve delivery reliability.
Environmental improvements are equally noteworthy. With an 80% cut in water use and 30% in electricity, these metrics are becoming invisible thresholds for foreign trade orders under carbon tariffs and green procurement trends. Markets like the EU are tightening scrutiny on textile carbon footprints, and suppliers adopting low-carbon processes will gain premium space. Hengyi's move is not just about cost—it's preparing for export markets in advance.
Practical Recommendations
For Buyers - Monitor the commissioning progress of Hengyi's Guangxi and Hangzhou bases (expected around 2028), and secure supply agreements for melt direct spinning PA6 filament early to gain cost advantages - Compare product consistency between traditional chip spinning and melt direct spinning, especially in dyeing uniformity and strength, and establish your own acceptance standards - Use water and electricity reduction data as quantitative basis for supplier ESG assessments, prioritizing low-carbon process suppliers
For Exporters - Highlight the low-carbon attributes of raw materials (e.g., 80% water reduction) in export quotations to meet European buyers' carbon footprint review needs - Verify certifications (such as GRS, OEKO-TEX) for Hengyi's new capacity, prepare relevant documents in advance to avoid losing orders - Consider signing long-term agreements with Hengyi to secure stable supply of melt direct spinning products, hedging against chip price volatility
The large-scale adoption of melt direct spinning is redefining the cost floor of the PA6 industry. Whoever masters the synergy of process and scale will take the lead in the next round of nylon reshuffling. For every player in the chain, this is both a challenge and an opportunity to reposition.