CHOPPED CARBON FIBER BUNDLES AND METHOD FOR PRODUCING CHOPPED CARBON FIBER BUNDLES

Title:

CHOPPED CARBON FIBER BUNDLES AND METHOD FOR PRODUCING CHOPPED CARBON FIBER BUNDLES

Document Type and Number:

WIPO Patent Application WO/2014/081002

Kind Code:

A1

Abstract:

Provided are: chopped carbon fiber bundles which have high fluidity without decreasing the dispersibility of carbon fibers and the physical properties of a molded product; and a method for producing chopped carbon fiber bundles with high productivity. Chopped carbon fiber bundles, each of which contain a carbon fiber bundle having a total fineness of from 25,000 dtex to 45,000 dtex (inclusive) and a sizing agent in an amount of from 1% by mass to 5% by mass (inclusive) relative to the total mass of the chopped carbon fiber bundle. The length (L) of each chopped carbon fiber bundle along the fiber direction of the carbon fiber bundle is from 1 mm to 50 mm (inclusive); the ratio of the longest diameter (Dmax) to the shortest diameter (Dmin) of a cross section perpendicular to the fiber direction of each chopped carbon fiber bundle, namely Dmax/Dmin is from 6.0 to 18.0 (inclusive); and the orientation parameter of the single fibers present in the surface of each chopped carbon fiber bundle is 4.0 or less.

Inventors:

OHTANI TADASHI (JP)
KIRIYAMA TAKAYUKI (JP)
NISHIMOTO YUKIO (JP)

Application Number:

PCT/JP2013/081478

Publication Date:

May 30, 2014

Filing Date:

November 22, 2013

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI RAYON CO (JP)

International Classes:

D06M15/564; C08J5/06; D06M15/227; D06M15/507; D06M15/55; D06M15/59; D06M101/40

Foreign References:

JP2006144168A	2006-06-08
JP2003268674A	2003-09-25
JP2003165849A	2003-06-10
JP2001271230A	2001-10-02
JP2010126841A	2010-06-10
JPH05261729A	1993-10-12
JPH05261730A	1993-10-12
JP2011208285A	2011-10-20
JPH1181146A	1999-03-26

Other References: