While the overcapacity debate in polyester continues, nylon has quietly become the new battleground for chemical fiber giants. Hengyi Petrochemical recently announced a 4.87 billion yuan investment to build a 400,000-ton PA6 melt direct spinning project, with an 18-month construction period, located in Guangxi and Hangzhou. This is not just capacity expansion; it represents a shift in process technology—replacing traditional chip spinning with melt direct spinning—drastically shortening the distance from raw material to yarn, rewriting cost structures and environmental accounts.
Background
Hengyi's move builds on its existing 600,000-ton annual PA6 chip capacity. In 2026, the Guangxi base operated at full capacity, indicating stable upstream supply. The new 400,000-ton melt direct spinning capacity essentially extends the chain to downstream spinning, filling the gap between chips and yarn.
Technologically, melt direct spinning is not new, but its large-scale application in PA6 remains cutting-edge. Hengyi's self-developed process eliminates chip packaging, warehousing, and transportation, directly spinning from polymer melt, reducing water use by about 80% and electricity by 30%. This significantly lowers unit processing costs and reduces pollutant emissions, aligning with current dual-carbon policy constraints on manufacturing.
Notably, the project is financed through a mix of internal funds and external borrowing, not relying on a single funding channel. This capital structure shows confidence in profitability and reduces financial leverage risk. For the industry, an 18-month construction period means that by around 2028, the market will see an additional 400,000 tons of PA6 fiber supply, potentially altering the supply-demand balance of mid-tier nylon products.
Industry Impact
Hengyi's move is not isolated. The chemical fiber industry is shifting from scale expansion to quality improvement, with high-performance fibers becoming the focus of leading companies. PA6, as a key raw material for engineering plastics and textile fibers, has downstream applications spanning apparel, home textiles, and industrial yarns. The promotion of melt direct spinning will raise industry-wide energy efficiency and force outdated chip spinning capacity to exit.
For buyers, the integration brings supply chain stability. Previously, fabric makers had to source PA6 yarn through multiple intermediaries, facing price volatility and delivery risks. Now, Hengyi's integrated production from raw material to yarn promises more transparent pricing and shorter lead times. The energy-saving advantage of melt direct spinning may translate into more competitive yarn prices, lowering downstream fabric costs.
For trading companies, the green attribute of nylon products is becoming a key export competitiveness factor. Markets like the EU impose increasingly stringent carbon footprint requirements on textiles. PA6 yarn produced with low-carbon processes is more likely to win orders from international brands. Hengyi's bases in Guangxi and Hangzhou also facilitate access to Southeast Asian and domestic markets, with clear logistics advantages.
However, concentrated capacity release warrants caution. If 400,000 tons of new capacity hits the market simultaneously, it could pressure PA6 fiber prices. But given Hengyi's upstream chip capacity, its integrated cost advantage can partially offset downside risks. For independent spinning mills, this undoubtedly intensifies competition, potentially accelerating industry consolidation.