Huafeng Chemical has been granted an invention patent: “A regenerated spandex fiber and its preparation method””

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According to data from the Tianyancha app, Huafeng Chemical (002064) has newly obtained an invention patent grant. The title of the patent is “A type of recycled spandex fiber and its preparation method”; the patent application number is CN202411158409.6, and the grant date is November 11, 2025. Patent abstract: The present invention provides a regenerated spandex fiber and its preparation method. The regenerated spandex fiber is obtained by reacting recycled spandex, a crosslinking agent, a mixed amine, and a reinforcing agent to yield a regenerated spinning material, which is then used for melt spinning to produce the regenerated spandex fiber. The preparation method includes a polymerization step: the optional spandex waste yarns, spandex waste materials, or the spandex components in used fabrics are crushed and dried to obtain recycled spandex ； The drying treatment temperature is 90～200℃ ； Spinning step: Using the aforementioned recycled spinning material as raw material, melt spinning is carried out through a spinning nozzle assembly; spinning and winding followed by shaping result in recycled spandex ； The spinning temperature is 220–250°C. The raw materials for recovering spandex used in this invention are available from a wide range of sources. The regenerated spandex fibers produced not only utilize green, environmentally friendly materials that are free from pollution, but also exhibit good processability; moreover, these fibers have excellent strength, high-temperature resistance, and chemical resistance, enabling them to reach the performance levels of conventional melt-spun spandex fibers. Since the beginning of this year, Huafeng Chemical has obtained 8 new patent approvals, a 33.33% increase compared to the same period last year. Based on the company’s financial figures for the first half of 2025, the company invested 466 million yuan in research and development during this period, a decrease of 2.69% compared to the previous year. According to Tianyancha’s big data analysis, Huafeng Chemical Co., Ltd. has made investments in 14 companies in total and participated in 92 bidding projects ； Regarding property clues, there are 46 trademark records and 235 patent records ； In addition, the company holds 8 administrative licenses.