METHOD FOR PREPARING CARBON FIBER AND PRECURSOR FIBER FOR CARBON FIBER

Title:

METHOD FOR PREPARING CARBON FIBER AND PRECURSOR FIBER FOR CARBON FIBER

Document Type and Number:

WIPO Patent Application WO/2011/122881

Kind Code:

A2

Abstract:

The method for preparing a carbon fiber of the present invention comprises the following steps: preparing a polyacrylonitrile-based polymer solution; spinning the spinning solution containing a polyacrylonitrile-based polymer to prepare a precursor fiber for a carbon fiber having a water content of 20-50 %; converting the precursor fiber for a carbon fiber into a pre-oxidation fiber while stretching the precursor fiber for a carbon fiber at a ratio of -10 to -0.1 % or 0.1 to 5 % at 180-220 ℃ in an air environment; converting the precursor fiber for a carbon fiber into an oxidation fiber while stretching the precursor fiber for a carbon fiber converted into the pre-oxidation fiber at an elongation of -5 to 5 % at 200-300 ℃ in an air environment; and heating the oxidation fiber under inert atmosphere to carbonize the same.

Inventors:

YOON JOON YOUNG (KR)
CHO EUN JEONG (KR)

Application Number:

PCT/KR2011/002236

Publication Date:

October 06, 2011

Filing Date:

March 31, 2011

Export Citation:

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Assignee:

KOLON INC (KR)
YOON JOON YOUNG (KR)
CHO EUN JEONG (KR)

International Classes:

D01F9/22; D01F6/18; D02J1/22

Foreign References:

JP2003161681A

2003-06-06

Other References: