Process for steam drawing carbon-fiber precursor acrylic fiber bundle

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10604871
APP PUB NO 20160151959A1
SERIAL NO

14900459

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Abstract

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This process for manufacturing a carbon-fiber precursor acrylic fiber bundle and this steam drawing apparatus are characterized in that the drawing of an acrylic fiber bundle with a pressured-steam drawing apparatus is conducted by: opening an acrylic fiber bundle by blowing a fluid thereto; supplying humidifying steam to the opened acrylic fiber bundle at a fiber temperature of 80 to 130° C. to adjust the water content of the fiber bundle to 3 to 7%; and thereafter drawing the resulting acrylic fiber bundle in a pressurized-steam atmosphere. Thus, the present invention can prevent the breaking of a single fiber, the fluffing of the fiber bundle, and the breaking of the whole of the fiber bundle, though such defects are susceptible to occurring in a case where an acrylic fiber bundle is drawn by steam drawing at a high draw ratio, at a higher speed, or into a fiber having a small denier.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI CHEMICAL CORPORATION1-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 100-8251

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mizutori, Yukihiro Otake, JP 24 35
Tada, Akishige Otake, JP 3 5

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