【Ten Years of Rapid Development in Chemical Processing Equipment】2223–2025: China’s First Pilot Plant for Producing Micro-grade High-Strength Polyoxymethylene Fibers at a Rate of 50 tons per year

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Give praise and encouragement to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Great Development in Chemical Engineering Equipment】Continuous updates and summaries are available; feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** Filling gaps both domestically and internationally! Another major breakthrough in specialty fiber materials! 2025-03-03 13:12:27 Recently, it was learned from the Kailuan Group’s Pilot Demonstration Platform for the Transformation of Scientific and Technological Achievements in Chemical New Materials in Hebei Province that China’s first industrial-scale demonstration facility for producing micro-grade high-strength polyoxymethylene fibers at a rate of 50 tons per year has, after nearly two months of trial production, shown stable operation. The strength parameters of the products exceed the design values by 10%, reaching 10.0 grams/denier. This development fills a gap in this field both domestically and internationally, marking another addition to the series of micro-grade polyoxymethylene fiber products developed through twelve years of independent research by Kailuan Group. High-strength polyoxymethylene fibers, also known as high-strength polyoxymethylene wires, possess a range of excellent properties including high stiffness, self-lubrication, resistance to seawater and solvents, wear resistance, fatigue resistance, creep resistance, tolerance to extreme temperatures, and good dimensional stability. Polyoxymethylene high-strength fibers are novel synthetic fibers manufactured using polyoxymethylene, a polymer material known as \"steel substitute\", as the basic raw material. These fibers have a breaking strength of over 9.0 grams/denier, with a filament diameter of less than 50 microns, and can be applied in areas such as deep-sea mooring cables, marine farms, high-end building materials (such as self-leveling materials), filtration equipment, powder metallurgy, and investment casting frameworks for precision manufacturing. Due to the high crystallinity, solvent resistance, and susceptibility to decomposition of polyoxymethylene materials, it is extremely difficult to produce microscale fiber products in a continuous and stable manner. Over the more than 70 years since the invention of polyoxymethylene materials, numerous companies and research institutions at home and abroad have conducted years of research on polyoxymethylene spinning with the goal of achieving micron-level dimensions and high strength, yet they have yet to overcome the dual bottlenecks related to specialized technical equipment. Since 2013, Kailuan Group has successively built four pilot and industrial demonstration units for the synthesis, modification, and spinning of polyoxymethylene. It has been granted nearly 20 invention patents, establishing a system that promotes the mutual improvement of process technology and equipment control as well as the development of independent intellectual property rights. As a result, it was the first to develop high-strength micro-grade polyoxymethylene fibers, representing a new form of productive capacity. The group now possesses a range of micro-grade polyoxymethylene fiber products, including industrial fibers, coarse-denier fibers, fine-denier fibers, specialty-shaped fibers, colored fibers, and high-strength fibers. According to available information, the predecessor of Kailuan Group was the Kailuan Mining Bureau, which was under the jurisdiction of the **Ministry of Fuel Industry and the Ministry of Coal Industry at various times. In 1998 it came under the administration of Hebei Province; in 1999 it was restructured into Kailuan (Group) Co., Ltd. In 2002, internal professional restructuring was carried out within the company. In 2003, the Zhangjiakou Weizhou Mining Company was integrated into it. In 2004, a publicly listed company named Kailuan Shares was established. In 2009, the Chengde Xinglong Mining Bureau was integrated into the group, and in 2010, the Hebei Automobile Group was merged to form Hebei Guohe Investment Group. The group company ranked 236th in the 2023 list of China’s Top 500 Enterprises. By the end of 2023, the group’s total assets amounted to 94.6 billion yuan. At present, the group company has established an industrial development framework based on \"three pillars and one new sector\", with coal, coal chemical industry, modern services, and strategic emerging industries as its core components. Its main products are thermal coal and washed coking coal; the approved production capacity for raw coal is 37.3 million tons, while the output of coking coal exceeds 6 million tons. The coal chemical industry in Tangshan has 4 coal chemical parks located at Jingtan Port, Fengrun, Qian’an, and Chengde, with a total production capacity of 8.6 million tons. Of this, 6.6 million tons are used for producing coke, while the capacity for 67 other coal-based chemical products such as methanol, polyoxymethylene, and adipic acid amounts to over 2 million tons. These products are utilized in the fields of new energy, new materials, and fine chemicals. Among the independent coal chemical enterprises in the province, these facilities have the largest scale and the longest industrial chain, and their level of circular economy is among the best in China. Polyoxymethylene and adipic acid fill gaps in the province; adipic acid is a champion product in Hebei Province’s manufacturing sector ； Zhonghao Company and Carbon Company are **-level high-tech enterprises as well as provincial-level \"specialized, refined, distinctive, and innovative\" small and medium-sized enterprises.