Tons! PA6 melt direct spinning scale industrialization road officially opened

As the second largest synthetic fiber in the world, nylon 6(PA6) fiber occupies a pivotal position in the textile sector. to a long time, the domestic sector has generally followed the "polymerization? cutting? extraction? re-melting" chip batch spinning process. The tedious and lengthy processing process lengthens the production cycle, however also brings high energy and material loss, and the pressure of pollutant discharge is always an unavoidable pain point in the nylon manufacturing sector.

In order to optimize the production mode, research studies institutions at home and abroad have been exploring the new process of PA6 melt direct spinning to many years. Restricted by a number of hard-core technical barriers, related technologies have been difficult to land, and the research of extensive industrialization has been stagnant.

This multi-unit collaborative research successfully landed polyamide 6 continuous polymerization melt direct spinning industrialization methodology, smoothly open the short process production channel, minimize resource loss, smoothly break through the sector methodology shackles.

After the hydrolysis and ring-opening polymerization of PA6, the content of small molecular impurities in the melt is high, and the melt condition does not meet the spinning standard, which is a difficult issue in the whole sector. The project research and research team has developed a highly adaptable continuous polymerization manufacturing process, self-developed high-efficiency short-process devolatilization process and a full set of special equipment, which can stably create high-condition polyamide 6 melt suitable to direct spinning processing and build a complete and mature integrated melt direct spinning production system.

The project won the world's first 10,000-ton polyamide 6 continuous polymerization melt direct spinning industrialization results, can be normalized to create high-condition differential nylon fiber. This technological breakthrough also means that China's polyamide? 6 fiber manufacturing methodology has officially completed the major transformation from following others to leading the sector, and stands on the world's cutting-edge methodology echelon.

At present, the world's first 10,000-ton industrialization demonstration device has entered a prolonged stable production stage, can create a variety of specifications of semi-extinction, full extinction POY, FDY nylon fiber. All the parameters of the items have reached the standard of superior items, the harvest of downstream customers broadly praised. The production line can also continuously create a variety of functional differentiated fibers such as easy decontamination, high elasticity, flame retardant, etc., fully releasing the unique advantages of the short process melt direct spinning process.

Compared with the traditional intermittent slice spinning process, the new methodology can minimize aquatic environments consumption by about 80% and save electricity by 30%. Eliminate the expenses of intermediate links such as slice packaging, storage and transportation, and greatly minimize the releases of three wastes. The advantages of economic benefits and environmentally friendly ecological preservation are very prominent.

Looking back on Hengyi's road of deep cultivation of methodology, the enterprise's first polyester melt direct spinning production line was officially put into operation in might 2001. By 2026, the enterprise will once again gnaw the hard bone of PA6 melt direct spinning. greater than 20 years of deep cultivation of core methodology, enough to prove that Hengyi's manufacturing hard power has never been just the expansion of production scale stack, the root lies in the adherence to independent research and research, firmly manage of key core technologies.

Next, Hengyi Petrochemical will continue to promote the extensive industrialization of polyamide 6 melt direct spinning methodology. This heavyweight research studies achievement has resolved the outstanding technical shortcomings of the chemical fiber sector, boosted the transformation of the textile manufacturing sector towards a low-carbon and environmentally friendly direction, broke through overseas technical monopoly barriers, strengthened the voice of the domestic chemical fiber sector in the global market, and continuously injected innovation momentum into the high-condition innovation and upgrading of the entire chemical fiber sector.

According to the monitoring data of the Institute of Chemical and Plastics, the total production capacity of PA6 in China will reach 8.705 million tons by the end of 2025. Since 2026, the domestic new PA6 production capacity of 225000 tons, up to now, the national PA6 production capacity has been expanded to 8.93 million tons.

At this stage, there are still 690000 tons of PA6 production capacity devices to be put into production in China, and the new capacity projects are mainly distributed in Hubei, Jiangsu, Shandong and Guangxi. If all the subsequent related devices are successfully put into operation, the total production capacity of PA6 in China will climb to 9.62 million tons by the end of 2026, and the capacity scale of the sector will be further expanded and upgraded.