Title:
PRODUCTION METHOD FOR CARBON FIBER PRECURSOR FIBERS
Document Type and Number:
WIPO Patent Application WO/2024/024654
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a production method for carbon fiber precursor fibers that have superior quality and production properties, by using a spinning dope that has superior stringiness and extensibility. The present invention uses, as a spinning dope, an acrylonitrile polymer in which: the area ratio (B/A) of the peak area A in the range in which the polystyrene equivalent molecular weight as measured by a gel permeation chromatography (GPC) method is at least 3,000,000 but less than 5,000,000 and the peak area B in the range in which the polystyrene equivalent molecular weight is 5,000,000-15,000,000, inclusive, is 0.8 or greater; and the area ratio (D/C) of the peak area C in the range in which the polystyrene equivalent molecular weight as measured by the gel permeation chromatography (GPC) method is less than 3,000,000, and the peak area D in the range in which the polystyrene equivalent molecular weight is between 3,000,000 and 15,000,000, inclusive, is 0.025 or less.
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Inventors:
MOYORI TAKAYA (JP)
NAKANISHI TAKAYUKI (JP)
YAMAGUCHI YORIHISA (JP)
NAKANISHI TAKAYUKI (JP)
YAMAGUCHI YORIHISA (JP)
Application Number:
PCT/JP2023/026719
Publication Date:
February 01, 2024
Filing Date:
July 21, 2023
Export Citation:
Assignee:
TEIJIN LTD (JP)
International Classes:
D01F6/18; C08F20/44; D01F9/22
Domestic Patent References:
| WO2009125832A1 | 2009-10-15 |
Foreign References:
| JP2008248219A | 2008-10-16 | |||
| JP2009197153A | 2009-09-03 | |||
| CN102517671A | 2012-06-27 | |||
| CN105622836A | 2016-06-01 |
Attorney, Agent or Firm:
TAMEYAMA Taro (JP)
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