CARBON FIBER BUNDLE AND METHOD FOR PRODUCING SAME

1 . A carbon fiber bundle to which an amino group-containing modified polyolefin resin has applied,

wherein the amount of the applying amino group-containing modified polyolefin resin is 0.2 to 5.0% by mass.

2 . The carbon fiber bundle according to claim 1 ,

wherein the carbon fiber bundle is obtained by a heat treatment at 200 to 300° C. for 5 seconds to 3 minutes, after the amino group-containing modified polyolefin resin is caused to apply to the surface of the carbon fiber.

3 . The carbon fiber bundle according to claim 2 ,

wherein the amount of the applying amino group-containing modified polyolefin resin is 0.5 to 4.0% by mass, and

the carbon fiber bundle is obtained by a heat treatment at 200 to 260° C. for 15 seconds to 3 minutes after the amino group-containing modified polyolefin resin is caused to apply to the surface of the carbon fiber.

4 . The carbon fiber bundle according to any one of claims 1 to 3 ,

wherein the amino group-containing modified polyolefin resin is caused to apply to the carbon fiber bundle by bringing an aqueous sizing agent dispersion containing the amino group-containing modified polyolefin resin into contact with the carbon fiber bundle.

5 . The carbon fiber bundle according to any one of claims 1 to 4 ,

wherein a limiting viscosity of the amino group-containing modified polyolefin resin measured in tetralin at 135° C. is 0.05 to 1.0 dL/g.

6 . The carbon fiber bundle according to any one of claims 1 to 5 ,

wherein the amino group-containing modified polyolefin resin is a product of a reaction between one kind of compound selected from the group consisting of an ethylene-ethyl acrylate-maleic anhydride copolymer, a maleic anhydride grafted polyethylene resin and a maleic anhydride grafted polypropylene resin, and a compound having two or more amino groups.

7 . The carbon fiber bundle according to any one of claims 1 to 6 ,

wherein the amino group-containing modified polyolefin resin is a copolymer that comprises an amino group and 70 to 99.98 mol % of a repeating unit represented by the following General Formula (I) and 0.02 to 30 mol % of a repeating unit represented by the following General Formula (II) in a molecule:

(in Formulae (I) and (II), each of R 1 and R 2 independently represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, an aryl group having 6 to 10 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxycarbonyl group having 1 to 18 carbon atoms, or an alkylcarboxyl group having 1 to 17 carbon atoms; each of R 3 and R 4 independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; and R 5 represents an alkylene group having 1 to 12 carbon atoms, a cycloalkylene group having 5 to 17 carbon atoms, an arylene group having 6 to 12 carbon atoms, an arylalkylene group having 7 to 12 carbon atoms, or a polyoxyalkylene group having 4 to 30 carbon atoms. R 1 to R 5 may be the same as or different from each other in each repeating unit.).

8 . A method of producing a carbon fiber bundle, comprising:

applying 0.2 to 5.0% by mass of an amino group-containing modified polyolefin resin to a surface of the carbon fiber bundle.

9 . The method of producing a carbon fiber bundle according to claim 8 , further comprising:

performing a heat treatment at 200 to 300° C. for 5 seconds to 3 minutes after applying the amino group-containing modified polyolefin resin to the surface of the carbon fiber bundle.

10 . The method of producing a carbon fiber bundle according to claim 8 or 9 , comprising:

applying 0.5 to 4.0% by mass of the amino group-containing modified polyolefin resin to the surface of the carbon fiber bundle; and then

performing a heat treatment at 200 to 260° C. for 15 seconds to 3 minutes.

11 . The method of producing a carbon fiber bundle according to claims 8 to 10 ,

wherein in applying the amino group-containing modified polyolefin resin to the carbon fiber bundle, the applying comprising bringing an aqueous sizing agent dispersion containing the amino group-containing modified polyolefin resin into contact with the carbon fiber bundle.

12 . The method of producing a carbon fiber bundle according to claim 11 , further comprising:

applying the aqueous sizing agent dispersion to the surface of the carbon fiber bundle by bringing the carbon fiber bundle into contact with the aqueous sizing agent dispersion;

performing a drying treatment; and then

performing the heat treatment.

13 . The method of producing a carbon fiber bundle according to claim 12 ,

wherein the drying treatment is performed at 100 to 200° C.