Sinopec has been granted an invention patent: “Method and apparatus for preparing UHMWPE fibers by dry spinning””

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According to data from the Tianyancha app, Sinopec (600028) has newly obtained an invention patent grant. The title of the patent is “Method and apparatus for preparing UHMWPE fibers by dry spinning”, with the patent application number CN202210770147.3; the grant date is May 1, 2026. Patent Abstract: The present invention relates to the field of dry spinning technology, and specifically to a method and apparatus for preparing UHMWPE fibers by dry spinning. The method includes: subjecting a UHMWPE gel to spinning treatment to obtain multiple fiber strands, feeding these strands into an annular channel, and carrying out stretching treatment. A number of air supply openings are provided in the air duct at the center of the inner circle of the channel, while slits are arranged on the wall of this inner-circle air duct ； While undergoing stretching, air from the air supply ports is blown through slits into the channel to supply air to the fiber bundle; the fibers after stretching are then gathered, drawn, shaped, and wound to produce UHMWPE fiber precursor strands. These precursor strands undergo further processing to yield UHMWPE fibers. The method provided by the present invention can significantly reduce the impact of tunnel air during dry spinning on the unevenness of the fiber diameter of the finished fibers, thereby effectively improving the uniformity of the fineness of UHMWPE fibers produced by dry spinning.