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 (1 Hwasung Park Apt, Sangmo-dong Gumi-si, Gyeongsangbuk-do 730-747, 730-747, KR)
윤준영 (경상북도 구미시 상모동 화성파크 APT, 730-747 Gyeongsangbuk-do, 730-747, KR)
윤준영 (경상북도 구미시 상모동 화성파크 APT, 730-747 Gyeongsangbuk-do, 730-747, KR)
Application Number:
KR2011/002236
Publication Date:
October 06, 2011
Filing Date:
March 31, 2011
Export Citation:
Assignee:
KOLON INDUSTRIES, INC. (1-23 Byeoryang-dong, Gwacheon-si, Gyeonggi-do 427-709, 427-709, KR)
코오롱인더스트리 주식회사 (경기도 과천시 별양동 1-23, 427-709 Gyeonggi-do, 427-709, KR)
YOON, Joon Young (1 Hwasung Park Apt, Sangmo-dong Gumi-si, Gyeongsangbuk-do 730-747, 730-747, KR)
코오롱인더스트리 주식회사 (경기도 과천시 별양동 1-23, 427-709 Gyeonggi-do, 427-709, KR)
YOON, Joon Young (1 Hwasung Park Apt, Sangmo-dong Gumi-si, Gyeongsangbuk-do 730-747, 730-747, KR)
International Classes:
D01F9/22; D01F6/18; D02J1/22
Attorney, Agent or Firm:
MYUNG MOON IP & LAW FIRM (8F Songchon Bldg, 642-9 Yeoksam-dong Gangnam-gu, Seoul 135-080, 135-080, KR)
Claims: