Acrylonitrile based fibers for use in production of oxidized...

Details Acrylonitrile based fibers for use in production of oxidized... Acrylonitrile based fibers for use in production of oxidized...

D - Textiles, Paper

01

F

402/300, 402/324

D01F 11/10 (2006.01) D01F 6/18 (2006.01) D01F 9/22 (2006.01) D01F 9/32 (2006.01)

Patent

CA 1159999

ABSTRACT OF THE DISCLOSUR An acrylonitrile based fiber is disclosed which is composed of copolymers comprising at least 96 mole% of acrylonitrile and 1 x 10-2 to 70 x 10-2 mole% of a vinyl component or vinyl components containing acidic groups J and containing a specific amount of zinc. The fiber is used in production of oxidized or flame resistant fiber. The oxidized or flame resistant fiber is produced by heat-treat- ing or oxidizing the acrylonitrile based fiber in an oxidation furnace equipped with a plurality of roller units while limiting the shrinkage of the acrylonitrile based fiber within specific limits as the oxidation proceeds. On carbon- izing the above oxidized or flame resistant fiber while limiting the shrinkage thereof a carbon fiber which is of high strength and low fluffing is obtained.

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