Method for preparing medium- and high-modulus large tow carbon fibers

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United States of America

PATENT NO 12215441
SERIAL NO

18808363

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Abstract

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A method for preparing medium- and high-modulus large tow carbon fibers includes performing in-phase microwave heating on low-modulus large tow carbon fibers, and regulating and controlling a surface current density of the carbon fibers in the range of 60-330 A/m to rapidly reach graphitization temperature of the carbon fibers, thereby completing a uniform and rapid graphitization process. The medium- and high-modulus large tow carbon fibers obtained by the preparation method of the present application can have a tensile modulus reaching 300-600 GPa, and a tensile strength maintained to be 3.5-5.0 GPa, and a dispersion of the tensile modulus of the carbon fibers is less than 1.5%.

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Patent Owner(s)

  • JIANGSU HENGRUI AEROSPACE INDUSTRY CO., LTD.; JIANGSU HENGRUI CARBON NEUTRALITY TECHNOLOGY CO., LTD

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gu, Yongtao Suzhou, CN 3 0
Li, Xuan Suzhou, CN 136 504
Wang, Chih-Yung Suzhou, CN 37 142

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