POLYBENZAZOLE FIBER AND PYRIDOBISIMIDAZOLE FIBER

Title:

POLYBENZAZOLE FIBER AND PYRIDOBISIMIDAZOLE FIBER

Document Type and Number:

WIPO Patent Application WO/2008/023719

Kind Code:

A1

Abstract:

[PROBLEMS] To provide fibers which retain the excellent heat resistance and flame retardancy inherent in polybenzazole fibers and pyridobisimidazole fibers, have improved post-processability, and neither necessitate a considerable change in production process conditions nor require a high-temperature long-term heat treatment, etc. [MEANS FOR SOLVING PROBLEMS] The fibers are a polybenzazole fiber and a pyridobisimidazole fiber and each is characterized in that crystals are present therein in such a state that a surface layer part (from the surface to 1 µm) of the fiber gives an electron beam diffraction pattern in which when the area of a diffraction peak attributable to the crystal (200) plane in an equatorial-direction profile is expressed by S1 and the area of a diffraction peak attributable to other specific crystal planes is expressed by S2, then the value of S2/S1 is in a specific range.

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Inventors:

KITAGAWA TOORU (JP)
KIRIYAMA KOHEI (JP)
WATANUKI SEIJI (JP)
TERAMOTO YOSHIHIKO (JP)
SHIMIZU YUSUKE (JP)

Application Number:

PCT/JP2007/066235

Publication Date:

February 28, 2008

Filing Date:

August 22, 2007

Export Citation:

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Assignee:

TOYO BOSEKI (JP)
KITAGAWA TOORU (JP)
KIRIYAMA KOHEI (JP)
WATANUKI SEIJI (JP)
TERAMOTO YOSHIHIKO (JP)
SHIMIZU YUSUKE (JP)

International Classes:

D01F6/74

Domestic Patent References:

WO1994025506A1

1994-11-10

Foreign References:

JPH0860437A	1996-03-05
JPH0978350A	1997-03-25

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