While most chemical fiber companies are still calculating profits within the slice-spinning segment, Hengyi Petrochemical has pushed nylon competition to a new dimension with a 4.87 billion yuan investment announcement. The 400,000-tonne annual PA6 melt direct spinning project is not just a capacity figure but a direct challenge to traditional process routes—an 80% reduction in water use and 30% in electricity consumption are enough to make any nylon plant re-evaluate its cost structure.
Background
The project will be implemented by two subsidiaries: Guangxi Hengyi New Materials and Hangzhou Yizhijin New Materials, with a construction period of 18 months and funding from internal and external sources. The sites are located in the Guangxi New Materials Industrial Park and the Yizhijin New Materials Industrial Park, geographically covering the southwestern raw material base and the East China consumer market—a dual-point layout that implies considerations for logistics and market responsiveness.
The core highlight is the process route. Hengyi will fully apply its self-developed PA6 melt direct spinning technology, which, compared with the industry-standard batch slice spinning, eliminates intermediate steps such as slice packaging, warehousing, and transfer. This means continuous production from caprolactam to spun fiber, not only shortening the process but also reducing pollutant and waste emissions at the source. For an industry under tightening energy consumption controls and carbon constraints, the appeal of this technical route is obvious.
In terms of capacity foundation, Guangxi Hengyi currently operates a 600,000-tonne annual PA6 slice production unit, running at full load in 2026. After the new project is completed, the company's business will extend from slice raw materials to downstream spinning, filling a key link in the nylon industry chain. This is not a simple capacity addition but a value-added utilization of existing slice capacity—internal integration means a more stable raw material supply and lower transaction costs.
Industry Impact
For buyers, the cost compression from melt direct spinning will eventually reflect in product pricing. Eliminating slice packaging and transfer could reduce manufacturing costs per tonne of PA6 fiber by hundreds of yuan, enough to create a price advantage in the competitive nylon fabric market. More importantly, fibers produced via direct spinning typically exhibit better uniformity and dyeability, which is a tangible benefit for downstream customers seeking high-quality fabrics.
For factories, the signal is clearer: competition in the nylon chain is shifting from single-product scale to integration efficiency. Once Hengyi connects slice to spinning, its risk-resistance capability will significantly strengthen—internal digestion can smooth cost impacts during raw material price fluctuations. Traditional slice-spinning enterprises that fail to upgrade may face dual pressure from high raw material costs and product homogeneity.
On the foreign trade front, nylon filament and fabrics are key export categories. Hengyi's green, low-carbon process aligns with overseas buyers' scrutiny of supply chain carbon footprints. The significant reductions in water and electricity consumption mean a lower product carbon footprint, helping exporters address trade barriers like the EU Carbon Border Adjustment Mechanism. Meanwhile, capacity concentration toward leaders may alter export pricing systems, and small and medium traders should monitor supply structure adjustments.