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Method for producing carbon fibers

A manufacturing method and technology of carbon fiber, which is applied in the field of carbon fiber manufacturing, can solve the problems of increasing the manufacturing cost of carbon fiber, and achieve the effect of high spinning efficiency and low content

Active Publication Date: 2017-11-28
KOBE STEEL LTD +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0008] However, the above-mentioned modification treatment of coal tar pitch has resulted in an increase in the production cost of carbon fibers.

Method used

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  • Method for producing carbon fibers

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Embodiment approach

[0073] The above-mentioned embodiments do not limit the configuration of the present invention. Therefore, in the above-mentioned embodiment, omission, substitution, or addition of constituent elements of each part of the above-mentioned embodiment may be made based on the description in this specification and technical common sense, and it should be construed that all of these belong to the scope of the present invention.

[0074] The method for producing carbon fibers of the present invention does not necessarily require the production of ash-free coal from bituminous coal or sub-bituminous coal. That is, in the method for producing a carbon material of the present invention, ash-free coal produced by a third party may be used as a raw material.

[0075] In this method of producing carbon fibers, after the carbonization step, the carbon fibers may be further graphitized by heating in a non-oxidizing atmosphere to a temperature higher than that of the carbonization step.

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Abstract

This method for manufacturing carbon fibers is provided with: a step for separating ashless coal obtained from bituminous coal or sub-bituminous coal into soluble components and insoluble components using a solvent extraction process; a step for heat-treating the soluble components; a step for melt-spinning the heat-treated soluble components; a step for infusibilizing the strands obtained by melt-spinning; and a step for carbonizing the infusibilized strands.

Description

technical field [0001] The present invention relates to a method for producing carbon fibers. Background technique [0002] Carbon fibers are widely used, for example, as reinforcements for structural materials such as resins, concrete, and ceramics. In addition, carbon fibers are also used as, for example, heat insulating materials, activated carbon raw materials, conductive materials, heat transfer materials, and the like. [0003] Carbon fiber is produced by spinning a synthetic resin such as polyacrylonitrile and pitch obtained from petroleum or coal into a fiber form, and subjecting the filament to infusibility (air oxidation) and carbonization. Coal tar pitch is a viscous black substance that is obtained by distilling off volatile components such as naphthalene from coal tar, a by-produced liquid substance, when coal is dry-distilled to produce coke. Such coal tar pitch is a mixture of various compounds containing a large amount of aromatic compounds containing a plu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/15
CPCC10G1/04D01F9/15D01D5/08D01D10/02
Inventor 滨口真基和田祥平井上聪则尹圣昊宫胁仁
Owner KOBE STEEL LTD
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