Title:
POLYACRYLONITRILE FIBER MANUFACTURING METHOD AND CARBON FIBER MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2012/073852
Kind Code:
A1
Abstract:
A polyacrylonitrile fiber manufacturing method that includes, in this order, a spinning step, a pre-drawing step, a drying step, and a post-drawing step that includes any of the following drying and drawing steps (a)-(c): (a) a step for performing drawing in mid-air, where the temperature of the thread from the thread separation point on a hot roll to the initial thread-connection point on the next roll is at least 130ºC; (b) a step for drawing where the distance from the thread separation point on a hot roll to the initial thread-connection point on the next roll is no greater than 20cm; and (c) a step in which post-drawing is performed in a hot-plate drawing zone where a hot plate is disposed between two rolls; that of these two rolls, the one that is disposed in a front position within the hot-plate drawing zone is a pre-heated hot roll; the hot plate is positioned so that the thread-connection starting point of the thread and the hot plate is no greater than 30cm from the thread separation point on the pre-heated hot roll, and drawing is performed with the surface speed of the pre-heated hot roll set to at least 100m/min.
Inventors:
ICHIKAWA TOMOKO
OCHI TAKASHI
KISHIRO AKIRA
KATO YASUTAKA
SHIBATA TAKASHI
ISE MASAFUMI
OCHI TAKASHI
KISHIRO AKIRA
KATO YASUTAKA
SHIBATA TAKASHI
ISE MASAFUMI
Application Number:
PCT/JP2011/077306
Publication Date:
June 07, 2012
Filing Date:
November 28, 2011
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
ICHIKAWA TOMOKO
OCHI TAKASHI
KISHIRO AKIRA
KATO YASUTAKA
SHIBATA TAKASHI
ISE MASAFUMI
ICHIKAWA TOMOKO
OCHI TAKASHI
KISHIRO AKIRA
KATO YASUTAKA
SHIBATA TAKASHI
ISE MASAFUMI
International Classes:
D01F6/18; D01F9/22
Foreign References:
| JPS63275718A | 1988-11-14 | |||
| JPH1181053A | 1999-03-26 | |||
| JP2008308776A | 2008-12-25 | |||
| JP2008248219A | 2008-10-16 | |||
| JPH11200141A | 1999-07-27 | |||
| JPH0978333A | 1997-03-25 | |||
| JPH04263613A | 1992-09-18 | |||
| JP2007126794A | 2007-05-24 |
Other References:
See also references of EP 2647745A4
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Claims: