WO2008108482A1 - ピッチ系炭素繊維、その製造方法および成形体 - Google Patents
ピッチ系炭素繊維、その製造方法および成形体 Download PDFInfo
- Publication number
- WO2008108482A1 WO2008108482A1 PCT/JP2008/054245 JP2008054245W WO2008108482A1 WO 2008108482 A1 WO2008108482 A1 WO 2008108482A1 JP 2008054245 W JP2008054245 W JP 2008054245W WO 2008108482 A1 WO2008108482 A1 WO 2008108482A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- average fiber
- carbon fiber
- pitch
- fiber length
- resin
- Prior art date
Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 157
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 157
- 238000000034 method Methods 0.000 title claims abstract description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims description 112
- 230000008569 process Effects 0.000 title abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 183
- 239000011295 pitch Substances 0.000 claims abstract description 60
- 239000011159 matrix material Substances 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000011302 mesophase pitch Substances 0.000 claims abstract description 14
- 238000009987 spinning Methods 0.000 claims description 22
- 239000006185 dispersion Substances 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 238000005087 graphitization Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000010298 pulverizing process Methods 0.000 claims description 11
- 229920002050 silicone resin Polymers 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 2
- 239000004695 Polyether sulfone Substances 0.000 claims description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920001643 poly(ether ketone) Polymers 0.000 claims description 2
- 229920002492 poly(sulfone) Polymers 0.000 claims description 2
- 229920006122 polyamide resin Polymers 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920006393 polyether sulfone Polymers 0.000 claims description 2
- 229920002530 polyetherether ketone Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 239000009719 polyimide resin Substances 0.000 claims description 2
- 229920005672 polyolefin resin Polymers 0.000 claims description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 238000001354 calcination Methods 0.000 claims 1
- 229920001568 phenolic resin Polymers 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 description 23
- 239000002131 composite material Substances 0.000 description 17
- 238000010304 firing Methods 0.000 description 15
- 239000000155 melt Substances 0.000 description 14
- 239000000945 filler Substances 0.000 description 12
- 239000003570 air Substances 0.000 description 11
- 238000002156 mixing Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 238000000227 grinding Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 229920002239 polyacrylonitrile Polymers 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000011231 conductive filler Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 4
- -1 polycyclic hydrocarbon compounds Chemical class 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013007 heat curing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- DIKBFYAXUHHXCS-UHFFFAOYSA-N bromoform Chemical compound BrC(Br)Br DIKBFYAXUHHXCS-UHFFFAOYSA-N 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 229920001059 synthetic polymer Polymers 0.000 description 2
- VEPOHXYIFQMVHW-PVJVQHJQSA-N (2r,3r)-2,3-dihydroxybutanedioic acid;(2s,3s)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O.O1CCN(C)[C@@H](C)[C@@H]1C1=CC=CC=C1 VEPOHXYIFQMVHW-PVJVQHJQSA-N 0.000 description 1
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- KRJBVTKYLBPUJC-UHFFFAOYSA-N [B+3].[O-2].[Al+3].[O-2].[O-2] Chemical compound [B+3].[O-2].[Al+3].[O-2].[O-2] KRJBVTKYLBPUJC-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000011337 anisotropic pitch Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229950005228 bromoform Drugs 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 229950005499 carbon tetrachloride Drugs 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011357 graphitized carbon fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 206010025135 lupus erythematosus Diseases 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/145—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from pitch or distillation residues
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
- Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2918—Rod, strand, filament or fiber including free carbon or carbide or therewith [not as steel]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
Definitions
- the present invention relates to a pitch-based carbon fiber having a specific fiber diameter and fiber length and having a distribution in a specific range, and a method for producing the same.
- the present invention also relates to a molded article having good thermal conductivity using pitch-based carbon fibers.
- High-performance carbon fibers can be classified into PAN-based carbon fibers made from polyacrylonitrile (PAN) and pitch-based carbon fibers made from pitches.
- PAN polyacrylonitrile
- Carbon fiber is used widely in aerospace / space applications, architecture / civil engineering applications, sports / leisure applications, etc., taking advantage of its significantly higher strength and elastic modulus than ordinary synthetic polymers.
- Carbon fibers have higher thermal conductivity and better heat dissipation than ordinary synthetic polymers. Carbon fiber achieves high thermal conductivity due to movement of phonon. Phonon transmits well in materials where the crystal lattice is developed.
- Commercially available PAN-based carbon fibers cannot be said to have a sufficiently developed crystal lattice, and their thermal conductivity is usually smaller than 200 W / (mK), which is not necessarily from the viewpoint of thermal management. It is hard to say that it is suitable.
- pitch-based carbon fibers have a high graphitization property, so that the crystal lattice is well developed, and it is easier to achieve high thermal conductivity than PAN-based carbon fibers.
- a heat conductive sheet made of a cured product filled with a heat conductive filler, a heat conductive spacer made of a hardened material having a flexibility filled with a gel material and a heat conductive filler, Fluid thermal conductivity with liquid matrix filled with thermal conductive filler Thermally conductive paint with paste and thermal conductive base diluted with solvent to improve fluidity, thermal conductive adhesive filled with thermal conductive filler in curable material, and phase change of resin
- the used phase change type heat radiating member is exemplified.
- the matrix may be filled with a high thermal conductivity material.
- a high thermal conductivity material Aluminum oxide boron nitride, aluminum nitride, magnesium oxide, zinc oxide, silicon carbide, quartz, aluminum hydroxide and other metal oxides, metal nitrides, metal carbides, metal hydroxides, etc.
- Patent Document 1 the metal material-based heat conductive material has a high specific gravity and the weight of the heat dissipating member increases.
- it is difficult to form a network, and it is difficult to obtain high thermal conductivity. Therefore, in order to improve thermal conductivity, it is necessary to use a large amount of thermal conductive material. As a result, the heat radiation member increases in weight and cost, and it is not necessarily easy to use.
- the heat conducting material forms a network with an appropriate matrix interposed.
- a fibrous material is widely known as a shape in which a network is easily formed (Patent Document 2).
- Carbon fiber As a fibrous material. Carbon fibers are used for carbon fiber reinforced plastics because of their rigidity and heat resistance (Patent Document 3). In addition, use for secondary battery electrodes has been proposed (Patent Document 4).
- Patent Document 5 proposes a heat dissipation sheet using a graphitic carbon fiber having an average fiber length of 30 xm or more and less than 300 xm.
- Patent Document 6 proposes a heat conduction device using a composition containing carbon fibers having a length of 10 to 1550 xm.
- Patent Document 7 proposes a semiconductor device containing graphitized carbon fiber coated with a ferromagnetic material.
- Patent Documents 5 to 7 have not been studied to improve the dispersibility of carbon fibers in the matrix, and there is room for improving the carbon fiber network-forming ability and improving the thermal conductivity. is there.
- Patent Document 1 Japanese Patent Laid-Open No. 2 0 0 5-7 2 2 2 0
- Patent Document 2 Patent Document 2
- Patent Document 3 JP-A-7-90725
- Patent Document 4 Japanese Patent Application Laid-Open No. 7-85862
- Patent Document 5 Japanese Unexamined Patent Publication No. 2000-192337
- Patent Document 6 Japanese Patent Laid-Open No. 11-279406
- Patent Document 7 JP 2002-146672 A Disclosure of Invention
- An object of the present invention is to provide a carbon fiber excellent in thermal conductivity suitable for use in a heat radiating member. Another object of the present invention is to provide a carbon fiber that has high thermal conductivity and can easily form a network in a matrix. Another object of the present invention is to provide a method for producing the carbon fiber. A further object of the present invention is to provide a molded article having a high thermal conductivity in which a network of carbon fibers is formed at a high density in the matrix.
- the carbon fiber used for the heat dissipation member is easy to form a network in the matrix and at the same time has high thermal conductivity.
- the inventors searched for a carbon fiber excellent in thermal conductivity and network forming ability. As a result, it was found that in a heat radiating member containing carbon fiber and matrix, the use of a pitch type carbon fiber having a large crystal size as the carbon fiber improves the thermal conductivity of the heat radiating member. It was also found that when the fiber length in the heat radiating member is set within a specific range and the fiber length distribution is made as uniform as possible, a carbon fiber network is easily formed and the thermal conductivity is improved. In addition, it has been found that the thermal conductivity is further improved when the fiber diameter in the heat dissipation member is in a specific range and the fiber diameter distribution is in a specific range. The present invention is based on these findings.
- the present invention uses mesophase pitch as a raw material, the average fiber diameter (AD) force ⁇ ⁇ 20 m, the percentage of fiber diameter dispersion (CV AD value) to the average fiber diameter (AD) is 5 to 15, the number average fiber length (NAL) is 25-500 ⁇ m, volume average fiber length (VA L) is 55-750 / m, volume average fiber length (VAL) is number average fiber length A pitch-based carbon fiber characterized by a value divided by (NAL) of 1.02 to 1.50.
- this invention includes the molded object using the said carbon fiber.
- the present invention relates to a method for producing pitch-based carbon fiber by spinning melted mesophase pitch by a melt blow method, infusifying, firing, and pulverizing, wherein the melted mesophase pitch has a viscosity of 5 to 25 Pa when spinning.
- the present invention is also a method for improving the thermal conductivity of a heat radiating member containing carbon fibers and a matrix, wherein the carbon fibers are made of mesophase pitch as a raw material, and the average fiber diameter (AD) is 5 to 20 / m, Percentage of fiber diameter dispersion with respect to average fiber diameter (AD) (CV AD value) Force 5-15, Number average fiber length (NAL) 25-500 m, Volume average fiber length (VAL) 55-750 m, The method includes using a pitch-based carbon fiber having a value obtained by dividing the volume average fiber length (VAL) by the number average fiber length (NAL) of 1.02 to 1.50.
- the carbon fiber of the present invention has a number average fiber length (NAL) of 25 to 500 / m, a volume average fiber length (VAL) of 55 to 750 m, and a volume average fiber length (VAL) of number average fiber length (NAL).
- NAL number average fiber length
- VAL volume average fiber length
- VALZNAL volume average fiber length
- the value divided by (VALZNAL) is 1.02 to 1.50.
- the number average fiber length (NAL) is preferably 50 to 500 m, more preferably 100 to 500 m, and still more preferably 100 to 400 m.
- the volume average fiber length (VAL) is preferably 60 to 750 m, more preferably 100 to 600 m.
- the VAL / NAL is preferably 1.1 to 1.4, more preferably 1.15 to 1.35. If the number average fiber length (NAL) is less than 25 xm, or the volume average fiber length (VAL) is less than 55 m, the network force between carbon fibers in the matrix cannot be sufficiently formed, resulting in high thermal conductivity. I can't demonstrate it. On the other hand, when the number average fiber length (N AL) exceeds 50 000 urn, or the volume average fiber length (VAL) exceeds 7500 m, the fiber entanglement significantly increases, and the viscosity is very high when mixed with resin. It becomes large and handling becomes difficult.
- the value obtained by dividing the volume average fiber length (VAL) by the number average fiber length (NAL) (VAL / NAL) means the wide fiber length distribution of the carbon fiber. If this value is less than 1.02, the fiber length is almost the same, which is virtually impossible. Also, if it exceeds 1.550, it means that the fiber length distribution force is very wide, and it will contain carbon fibers with very short fiber lengths or very long fiber lengths. The viscosity will increase.
- the average fiber length can be controlled by the flour conditions. That is, the average fiber length is adjusted by adjusting the rotation speed of the cutlet, the rotation speed of the pole mill, the air velocity of the jet mill, the number of collisions of the crusher, and the residence time in the powdering apparatus when powdering with a cutlet etc. Can be controlled. Further, it can be adjusted by removing the short fiber length or the long fiber length from the carbon fiber after pulverization by performing classification operation such as sieving.
- the pitch-based carbon fiber according to the present invention has a number average fiber length (NAL) of 100 to 500 m and a mesh ratio of 5 to 3 m. It is desirable that the proportion remaining on the sieve when it is classified with a sieve having a mesh of 60% and an opening of 100 m is 10 to 29%.
- the carbon fiber remaining on the sieve with a mesh size of 53 m forms a matrix and acts effectively on heat conduction.
- the carbon fibers remaining on the 100 Mm mesh sieve have high bulk density, and thus entangle in the matrix to form voids.
- the short carbon fibers remaining under the 53 m mesh enter the voids, so that the filling state of the carbon fibers in the matrix becomes suitable.
- This condition is preferably satisfied when it is classified with a 5 3 mesh sieve.
- the remaining ratio is 30 to 60%, and the remaining ratio on the sieve is 10 to 29% when classified with a mesh sieve having a mesh size of 100 m.
- the proportion remaining on the sieve can be controlled by controlling the grinding conditions and classification conditions.
- a specific control method is to remove a short fiber length or a long fiber length pitch-based carbon fiber filler using a sieve or a mesh after powdering.
- the strength of the powder for example, the rotation speed of the blade of the cutter, the rotation speed of the ball mill, the air velocity of the jet mill, the number of crusher collisions, the residence time in the powder mill, etc.
- the fiber length distribution can be controlled, By combining this with control using a sieve or mesh, the ratio on the sieve can be controlled more precisely.
- AD Average fiber diameter
- the average fiber diameter (AD) of the carbon fiber is 5 to 20 zm. If it is less than 5, the number of fillers increases when combined with the matrix, so the viscosity of the matrix / filler mixture becomes high and molding becomes difficult. If it exceeds 2, the number of fillers decreases when combined with the matrix, making it difficult for the fillers to come into contact with each other.
- the average fiber diameter (AD) is preferably 5 to 15 m, more preferably 7 to 13 m.
- the CV AD value determined as a percentage of the fiber diameter dispersion relative to the average fiber diameter (AD) is 5-15.
- the CV AD value can be obtained by the following formula.
- CV AD S / AD (1) 'where S is the fiber diameter dispersion degree and AD is the average fiber diameter.
- D is the diameter of each fiber
- n is the measured number of individuals.
- a smaller CV AD value means higher process stability and less product variation.
- the CV AD value is less than 5
- the fiber diameters are uniform, making it difficult for fillers with small fiber diameters to enter between fillers, making it difficult to add a large amount when compounding with the matrix. It is difficult to obtain a high-performance composite material.
- the CV AD value is greater than 15, viscosity unevenness is likely to occur when combined with a matrix, and the dispersibility will be low. As a result, the dispersion of the filler inside the composite material is not uniform, and uniform thermal conductivity cannot be exhibited.
- the CV AD value can be realized by adjusting the viscosity of the melted mesophase pitch during spinning, specifically by adjusting the melt pitch during spinning to 5 to 25 Pa ⁇ S when spinning by the melt blow method. .
- the carbon fiber of the present invention preferably has a crystallite size derived from the growth direction of the hexagonal network surface of 5 nm or more.
- the crystallite size derived from the growth direction of the hexagonal network surface can be determined by a known method, and can be determined by diffraction lines from the (110) plane of the carbon crystal obtained by the X-ray diffraction method.
- the reason why the crystallite size is important is that heat conduction is mainly borne by phonon, and it is the crystal that generates phonon.
- the crystallite size is more preferably 2 Onm or more, and further preferably 30 nm or more.
- the upper limit of crystallite size is about 100 nm.
- the true density of the carbon fiber is preferably 1.5 to 2.3 g / c c, more preferably 1.8 to 2.3 gZc c, and still more preferably 2.1 to 2.
- S gZc c When it is within this range, the graphitization power S is sufficiently increased and sufficient thermal conductivity can be exhibited, and the energy cost for graphitization is commensurate with the characteristics of the obtained carbon fiber.
- the thermal conductivity of the carbon fiber in the fiber axis direction is preferably 30 OW / m'K or more, more preferably 6100 to 1, lOOWZm'K. When it is 30 O WZm ⁇ K or more, sufficient thermal conductivity can be obtained when a molded body is produced by mixing with a matrix.
- the pitch-based carbon fiber of the present invention can be produced by spinning a melted mesophase pitch by a melt-pro method, making it infusible, firing, pulverizing, and classifying as necessary. It is preferable to graphitize after powdering.
- Examples of the raw material for the pitch-based carbon fiber of the present invention include condensed polycyclic hydrocarbon compounds such as naphthalene and phenanthrene, and condensed heterocyclic compounds such as petroleum pitch and coal pitch. Among these, naphthenolene and phenanthrene and condensed polycyclic hydrocarbon compounds such as those are preferred.
- an optical anisotropic pitch that is, a mesophase pitch is preferable. These may be used singly or in appropriate combination of two or more, but it is particularly preferable to use mesophase pitch alone in order to improve the thermal conductivity of the carbon fiber.
- the softening point of the raw material pitch can be determined by the Metra method, and is preferably 25 ° C. or more and 35 ° C. or less. When the softening point is lower than 250, fusion of fibers and large heat shrinkage occur during infusibility. On the other hand, if the temperature is higher than 350 ° C, the temperature suitable for spinning becomes high, and thermal decomposition of the pitch tends to occur, and spinning becomes difficult.
- the raw material pitch can be fiberized by melt spinning after being melted and discharged from a nozzle and cooled.
- the spinning method There is no particular limitation on the spinning method, but specifically, a normal spinning method in which the pitch discharged from the die is pulled by a winder, a melt blow method using hot air as an atomizing source, and a centrifugal separation using a centrifugal force.
- the spinning method can be mentioned, it is preferable to use the melt blow method for reasons such as high productivity.
- the raw material pitch is preferably melt-spun and then graphitized through infusibilization, firing and dusting.
- each process will be described by taking the melt blow method as an example.
- the spinning nozzle of the pitch fiber that is the raw material of the pitch-based carbon fiber
- the spinning nozzle has an introduction angle ⁇ of 10 to 90 °, and a discharge port length L A nozzle having a ratio LZD of 6 to 20 is preferably used.
- the temperature of the nozzle at the time of spinning may be a temperature at which a stable spinning state can be maintained.
- the viscosity of the melt pitch during spinning is preferably 5 to 25 Pa ⁇ S, more preferably 6 to 22 Pa ⁇ S.
- the temperature dependence of the viscosity of the melt pitch varies depending on the composition of the raw material pitch, that is, the content of the readily volatile component, specifically, the temperature of the melt pitch is 40 to 60 ° C higher than the softening point. When adjusted, this viscosity can often be achieved.
- the shearing force applied to the raw material pitch can arrange the aromatic rings to some extent.
- the spinning condition deviates from this condition, for example, when the shearing force is stronger, such as when the viscosity is smaller, the introduction angle is smaller, or the L / D is larger, the alignment progresses too much and graphitization occurs. When this occurs, the carbon fibers are easily broken.
- the pitch fibers drawn out from the nozzle holes blow a gas with a linear velocity of 100-10,000 m / min, heated to 100-35 ° C. per minute, in the vicinity of the thinning point.
- a gas having a temperature close to the melting temperature of the raw material pitch is blown.
- the higher the linear velocity of the gas to be blown the stronger the stretching effect works, and the thinner fibers tend to be obtained.
- the gas linear velocity is increased too much, the pitch fibers are cut, and the loss in the wire mesh belt described later increases.
- the preferred linear velocity varies depending on the melt viscosity at the time of spinning. Specifically, when the melt viscosity is 10 OP a ⁇ S, the linear velocity is preferably 3,00 to 7,000 mforce S per minute. As the gas to be blown, air, nitrogen and argon can be used. Air is preferable from the viewpoint of cost performance. Pitch fibers are collected on a wire mesh bell to form a continuous mat, and then cross-wrapped to form a three-dimensional random mat.
- the three-dimensional random mat is a mat in which pitch fibers are entangled three-dimensionally in addition to being cross-wrapped. This entanglement is achieved in a tube called chimney while reaching the wire mesh belt from the nozzle. Since linear fibers are entangled three-dimensionally, the properties of fibers that normally show only one-dimensional behavior are reflected in three-dimensional.
- the three-dimensional random mat made of pitch fibers thus obtained is infusible by a known method. Infusibilization is achieved at 20 ° C. to 3500 ° C. using air or a gas obtained by adding ozone, nitrogen dioxide, nitrogen, oxygen, iodine, bromine to air. Considering safety and convenience, it is preferable to carry out in air.
- the infusibilized pitch fiber is fired at 600 to 1,500 ° C. in vacuum or in an inert gas such as nitrogen, argon or krypton. Firing is often performed at normal pressure and in low-cost nitrogen.
- pitch-based carbon fibers can be obtained by pulverizing the fibers.
- the pulverization can be performed by a known method. Specifically, a cutter, a pole mill, a jet mill, a crusher, or the like can be used.
- the carbon fiber is preferably classified with a sieve in order to remove carbon fibers having a long fiber length or short carbon fibers.
- the pores of the sieve for removing long carbon fibers are about 0.8 to 1 mm.
- the pores of the sieve for removing short carbon fibers are about 20 zm. The shorter the classification, the shorter or longer the carbon fibers can be removed.
- This classification step may be performed after pulverization or after graphitization, but the pulverizer and the classification device can be easily combined, and the classification process after pulverization can be performed efficiently. Preferred.
- the pulverized pitch-based carbon fiber is classified as necessary, and then preferably graphitized.
- the graphitization temperature is preferably set to 2, 00 to 3,500 ° C. in order to increase the thermal conductivity of the carbon fiber. More preferably, it is 2,300 to 3,100 ° C. More preferably, it is 2,800 to 3,100 ° C.
- the graphite lups can contain the desired amount of the above carbon fiber. If there is no restriction on the size and shape, it is airtight with a lid to prevent damage to the carbon fiber due to reaction with oxidative gas or water vapor in the furnace during graphitization or cooling. Those having high properties can be suitably used.
- For graphitization it is common to change the type of inert gas according to the type of furnace used.
- the carbon fiber of the present invention can be combined with a matrix to obtain a molded body such as a compound, a sheet, a dull cloth, and an adhesive. Therefore, the present invention includes a molded body using the carbon fiber.
- the molded body contains carbon fibers and a matrix, and the carbon fiber content is preferably 10 to 70 parts by weight, more preferably 20 to 60 parts by weight with respect to 100 parts by weight of the molded body. is there.
- matrix polyolefin resin, polyester resin, polycarbonate resin, polyamide resin, polyimide resin, polyphenylene sulfide resin, polysulfone resin, polyethersulfone resin, polyetherketone resin, polyether Ether ketone resins, epoxy resins, acrylic resins, phenol resins, silicone resins, and the like can be used.
- the molded body is suitable as a heat radiating member for a heat-generating electronic component.
- the present invention is a method for improving the thermal conductivity of a heat dissipating member containing carbon fibers and a matrix, and the mesophase pitch is used as a raw material for the carbon fibers, and the average fiber diameter (AD) is 5 to 20 111, average 100% of fiber diameter dispersion to fiber diameter (AD)
- the ratio (CV AD value) is 5 to 15, the number average fiber length (NAL) is 25 to 500 111, the volume average fiber length (VAL) is 55 to 750 m, and the volume average fiber length (VA L) is number average.
- the method includes using pitch-based carbon fibers having a value obtained by dividing the fiber length (NAL) by 1.02 to 1.50.
- the carbon fiber and the matrix are as described above.
- the content of carbon fiber in the heat radiating member is preferably 10 to 70 parts by weight, and more preferably 20 to 60 parts by weight with respect to 100 parts by weight of the heat radiating member.
- the average fiber diameter (AD) of carbon fibers was an average value obtained by measuring 60 calcined carbon fibers using a scale under an optical microscope.
- the number average fiber length (NAL) of carbon fibers is the average value of 1,000 carbon fibers that have been baked and measured with a length measuring instrument.
- the volume average fiber length (VAL) was obtained as an average value of square values of the measured fiber lengths of 1,000 fibers, and was obtained as a square root of the average value.
- the crystallite size of the carbon fiber was determined by the Gakushin method by measuring the reflection from the (110) plane appearing in X-ray diffraction.
- the density of carbon fiber can be adjusted by adjusting the mixing ratio of bromoform (density 2.90 g / cc) and 1, 1, 2, 2-tetrachloromethane (density 1.59 g / cc). Carbon fiber was introduced into the mixed liquid with adjusted density, and the amount was determined from the degree of carbon fiber sedimentation.
- the proportion of pitch-based carbon fiber filler remaining on the mesh is 100 g of carbon fiber with a mesh size of 100 xm and mesh size of 53 m, and a shaker (manufactured by Yuna Catec Co., Ltd., R-1) After sieving with, it was determined by measuring the mass of the obtained carbon fiber.
- a shaker manufactured by Yuna Catec Co., Ltd., R-1
- Pitch made of condensed polycyclic hydrocarbon compound was used as the main raw material.
- the optical anisotropy ratio was 100%, and the softening point was 283 ° C.
- heated air is ejected from the slit at a linear velocity of 5,500 m / min, and the molten pitch is pulled to draw a pitch short fiber with an average diameter of 14.5 zm Was made.
- the resin temperature at this time was 337 ° C, and the melt viscosity was 8.0 Pa ⁇ S.
- the spun fibers were collected on a belt to form a mat, and then a three-dimensional random mat made of pitch-based short fibers having a basis weight of 320 g / m 2 by cross wrapping.
- This three-dimensional random mat was infusibilized by raising the temperature from 170 ° C to 285 ° C at an average temperature increase rate of 6 ° CZ.
- An infusibilized 3D random mat was pulverized with a cutlet (made by Yuichi Po Kogyo Co., Ltd.) at 800 rpm, and classified with a 1 mm sieve, and fired at 3,000 ° C.
- the average fiber diameter (AD) of the carbon fiber after firing was 8.8 urn, and the percentage of fiber diameter dispersion (CV value) with respect to the average fiber diameter (AD) was 12%.
- the number average fiber length (NAL) is 200 ⁇ m on average and the volume average fiber length (VAL) is 240 m.
- the value obtained by dividing the volume average fiber length (VAL) by the number average fiber length (NAL) is 1.20.
- the proportion remaining on the sieve was 45%, and the fraction remaining on the sieve was 24% when classified with a sieve having a mesh size of 100 / xm.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 70 nm.
- the true density was 2.18 g / cc and the thermal conductivity was 35 OW / m-K.
- Carbon fiber / silicone composite was obtained by mixing 25 parts by weight of the obtained carbon fiber and 75 parts by weight of a silicone resin (SE 1740, manufactured by Toray Dow Silicone Co., Ltd.) and heat-curing at 130 ° C. .
- the measured carbon fiber Z silicone composite had a thermal conductivity of 6.3 WZ (m ⁇ K).
- a carbon fiber was produced in the same manner as in Example 1 except that the rotational speed of the cutter was changed to 700 rpm.
- the average linear diameter of the carbon fibers after firing was 8.6 zm, and the percentage of fiber diameter dispersion (CV value) with respect to the average fiber diameter (AD) was 12%.
- the number average fiber length (NAL) is 300 nm
- the volume average fiber length (VAL) is 390 m
- the volume average fiber length (VAL) divided by the number average fiber length (NAL) is 1.30.
- Yes when classified with a sieve having a mesh size of 53 m, the percentage remaining on the sieve was 55%.
- the ratio remaining on the sieve was 29%.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 70 nm.
- the true density was 2.18 g / c c and the thermal conductivity was 35 OWXm ⁇ K.
- Carbon fiber Z silicone composite by mixing 25 parts by weight of the obtained carbon fiber and 75 parts by weight of silicone resin (manufactured by Dow Silicone Co., Ltd., SE 1740) and thermosetting at 130 ° C. I got a thing. When the thermal conductivity of the produced carbon fiber / silicone composite was measured, it was 6.6 W / (m-K). Comparative Example 1
- Carbon fibers were produced in the same manner as in Example 1 except that the classification operation with a sieve was not performed.
- the average fiber diameter (AD) of the carbon fiber after firing is 8.8 / im
- the percentage of fiber diameter dispersion (CV value) was 12%.
- the number average fiber length (NA L) is 250 m
- the volume average fiber length (VAL) is 400 m
- the value obtained by dividing the volume average fiber length (VAL) by the number average fiber length (NAL) is 1.60.
- Yes when classified with a sieve with a mesh size of 53 zm, the ratio remaining on the sieve is 62%, and when classified with a sieve with a mesh size of 100 m, the ratio remaining on the sieve is 33%. there were.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 70 nm.
- the true density was 2.19 gZc c and the thermal conductivity was 35 OWZm ⁇ K.
- Carbon fiber / silicone composite was obtained by mixing 25 parts by weight of the obtained carbon fiber and 75 parts by weight of a silicone resin (SE 1740, manufactured by Toray Dow Silicone Co., Ltd.) and heat-curing at 130 ° C. .
- the thermal conductivity of the produced carbon fiber Z silicone composite was measured and found to be 3.3 W / (m-K). Comparative Example 2
- Carbon fibers were produced in the same manner as in Example 1 except that the rotation speed of the cutlet was changed to 1,200 rpm.
- the average fiber diameter (AD) of the carbon fibers after firing was 8.8 / m, and the ratio (CV value) of the fiber diameter dispersion to the average fiber diameter (AD) was 13%.
- the number average fiber length (NAL) is 40 m on average, the volume average fiber length (VAL) is 50 m, and the volume average fiber length (VAL) divided by the number average fiber length (NAL) is 1.13.
- the ratio remaining on the sieve is 18%
- the ratio remaining on the sieve is 3%. there were.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 7 Onm.
- the true density was 2.18 g / c c and the thermal conductivity was 35 OWZm ⁇ K.
- Carbon fiber Z silicone composite is obtained by mixing 25 parts by weight of carbon fiber and 75 parts by weight of silicone resin (SE 1740, manufactured by Toray Industries, Inc.) and thermosetting at 130 ° C. It was. When the thermal conductivity of the produced carbon fiber / silicone composite was measured, it was 1.4 WZ (m-). Comparative Example 3
- a carbon fiber was produced in the same manner as in Example 1 except that the rotation speed of the cutlet was changed to 400 rpm.
- the average fiber diameter (AD) of the carbon fibers after firing was 8.8 mm, and the percentage (CV value) of fiber diameter dispersion with respect to the average fiber diameter (AD) was 12%.
- the number average fiber length ( ⁇ L) is 600 urn on average, the volume average fiber length (VAL) is 700 m, and the value obtained by dividing the volume average fiber length (VAL) by the number average fiber length (NAL) is 1. 17
- the ratio of remaining on the sieve is 87% when classified with a 53 / xm mesh sieve, and the remaining ratio on the sieve is 59% when classified with a 100 m mesh sieve.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 70 nm.
- the density was 2.18 g / c c and the thermal conductivity was 35 OWZm * K.
- Carbon fibers were produced in the same manner as in Example 1, except that the resin temperature was changed to 345 ° C and the melt viscosity was changed to 2.0 Pa ⁇ S.
- the average fiber diameter (AD) of the carbon fiber after firing was 8.4 m, and the ratio (CV value) of the fiber diameter dispersion to the average fiber diameter (AD) was 19%.
- the number average fiber length (NAL) is 180 ⁇ on average and the volume average fiber length (VAL) is 240 zm.
- the value obtained by dividing the volume average fiber length (VAL) by the number average fiber length (NAL) is 1.
- the ratio remaining on the sieve is 49%.
- the ratio remaining on the sieve is 23%. It was.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 7 Onm.
- the true density was 2.18 gZc c and the thermal conductivity was 35 OW / m'K.
- Carbon fiber was obtained by mixing 25 parts by weight of the obtained carbon fiber and 75 parts by weight of a silicone resin (SE 1740 manufactured by Toray 'Dow Silicone Co., Ltd.). A fiber / silicone composite was obtained, but carbon fibers were not uniformly dispersed, and a molded product with unevenness was obtained. Comparative Example 5
- Carbon fibers were produced in the same manner as in Example 1 except that the 3,000 ° C firing process was changed to before powdering.
- the average fiber diameter (AD) of the carbon fiber after firing was 8.1 urn, and the ratio of the fiber diameter dispersion to the average fiber diameter (AD) (CV value) was 18%.
- the number average fiber length (N AL) is 210 urn on average, the volume average fiber length (VAL) is 300 m, and the volume average fiber length (VAL) divided by the number average fiber length (NAL) is 1.
- the ratio of remaining on the sieve is 48% when classified with a sieve with a mesh size of 53 zzm, and the ratio of remaining on the sieve is 26% when classified with a sieve with a mesh of 100 m. It was.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 70 nm.
- the true density was 2.18 g / c c and the thermal conductivity was 35 OWZm ⁇ K.
- AD Average fiber diameter
- NAL Number average fiber length
- VAL Volume average fiber length Table 2
- a pitch composed of a condensed polycyclic hydrocarbon compound was used as a main material.
- the optical anisotropy ratio was 100%, and the softening point was 283 ° C.
- heated air was ejected from the slit at a linear velocity of 5, 50 Om per minute, and the pitch was pulled by the molten pitch to produce pitch-based short fibers with an average diameter of 14.5 m. Produced.
- the resin temperature at this time was 337, and the melt viscosity was 8. OPa ⁇ S.
- the spun fibers were collected on a belt to form a mat, and then a three-dimensional random mat made of pitch-based short fibers having a basis weight of 320 g / m 2 by cross wrapping.
- This three-dimensional random mat was infusibilized by raising the temperature from 170 ° C to 285 ° C in air at an average temperature increase rate of 6 ° CZ.
- Infusibilized 3D random mats were pulverized at 800 rpm by Katsuda (manufactured by Turbo Kogyo Co., Ltd.), and classified with a 1 mm mesh sieve and fired at 3,000 ° C.
- the average fiber diameter (AD) of the pitch-based carbon fiber filler after firing was 8.8 m, and the fiber diameter dispersion percentage (CV value) ratio to the average fiber diameter (AD) was 12.
- the number average fiber length (NAL) is 200 m, and when classified with a mesh sieve with a mesh opening of 53 / m, the proportion remaining on the sieve is 45%, and with a mesh sieve with a mesh opening of 100 m. The percentage remaining on the sieve was 24%.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 70 nm.
- the density was 2.18 g / cc and the thermal conductivity was 35 OW / m ⁇ K.
- Carbon fiber Z silicone composite was obtained by mixing 25 parts by weight of the obtained carbon fiber and 75 parts by weight of a silicone resin (SE 1740, manufactured by Toray Dow Silicone Co., Ltd.) and thermosetting at 130 ° C. .
- the measured carbon fiber Z silicone composite had a thermal conductivity of 5.6 W / (m ⁇ K).
- a pitch-based carbon fiber filler was produced in the same manner as in Example 1 except that the rotation speed of the cutlet was changed to 900 rpm.
- the average fiber diameter (AD) of the pitch-based carbon fiber filler after firing was 8.8 rn, and the ratio of the fiber diameter dispersion to the average fiber diameter (AD) (CV value) was 12.
- the number average fiber length (NAL) is 160 m, and when classified with a mesh sieve with a mesh opening of 53 / xm, the percentage remaining on the sieve is 35%. When classified with a mesh sieve with a mesh opening of 100 m The proportion remaining on the sieve was 20%.
- the crystallite size derived from the growth direction of the hexagonal mesh plane was 7 Onm.
- the density was 2.18 g / c c and the thermal conductivity was 35 OWZm ⁇ K.
- Carbon fiber / silicone composite was obtained by mixing 25 parts by weight of the obtained carbon fiber and 75 parts by weight of silicone resin (Toray 'Dow Silicone Co., Ltd., SE 1740) and thermosetting at 130 ° C. Obtained. When the thermal conductivity of the produced carbon fiber Z silicone composite was measured, it was 4.8 WZ (m-K).
- Table 3 The results of Examples 3 and 4 are summarized in Table 3 and Table 4.
- AD Average fiber diameter
- NAL Number average fiber length
- VA L Volume average fiber length Table 4
- the carbon fiber of this invention is excellent in thermal conductivity, and can be used for a heat radiating member.
- the carbon fiber of the present invention has high thermal conductivity and is easy to form a network in the matrix. According to the method for producing carbon fiber of the present invention, a carbon fiber free from uneven fiber diameters can be produced. Furthermore, in the molded article of the present invention, a carbon fiber network is formed at a high density in the matrix and has high thermal conductivity.
- the carbon fiber of the present invention can be used for a heat radiating member of a heat-generating electronic component.
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EP08721661A EP2128313A4 (en) | 2007-03-06 | 2008-03-04 | CARBON FIBER MANUFACTURED FROM PECH, METHOD FOR THE PRODUCTION THEREOF AND FORM BODY |
JP2009502636A JPWO2008108482A1 (ja) | 2007-03-06 | 2008-03-04 | ピッチ系炭素繊維、その製造方法および成形体 |
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WO2010024462A1 (ja) * | 2008-09-01 | 2010-03-04 | 帝人株式会社 | ピッチ系黒鉛化短繊維及びそれを用いた成形体 |
WO2010084856A1 (ja) * | 2009-01-20 | 2010-07-29 | 帝人株式会社 | ピッチ系炭素繊維ウェブ、ピッチ系炭素短繊維、およびその製造方法 |
Families Citing this family (4)
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WO2008108482A1 (ja) * | 2007-03-06 | 2008-09-12 | Teijin Limited | ピッチ系炭素繊維、その製造方法および成形体 |
BR112017004587B1 (pt) * | 2014-09-12 | 2022-04-05 | Toyo Seikan Group Holdings, Ltd | Artigo moldado com resina, e, processo para produzir um artigo moldado com resina. |
US9423239B2 (en) * | 2014-12-19 | 2016-08-23 | Toyota Motor Engineering & Manufacturing North America, Inc. | Method to improve fiber length measurement using confocal laser scanning microscope images |
KR102532605B1 (ko) | 2018-07-24 | 2023-05-15 | 삼성전자주식회사 | 나노결정질 그래핀 캡층을 포함하는 인터커넥트 구조체 및 이 인터커넥트 구조체를 포함하는 전자 소자 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3648865A (en) | 1969-04-29 | 1972-03-14 | Corning Glass Works | Article handling |
JPH0785862A (ja) | 1993-09-17 | 1995-03-31 | Toshiba Corp | 二次電池用負極 |
JPH0790725A (ja) | 1993-09-17 | 1995-04-04 | Petoca:Kk | メソフェーズピッチ系炭素繊維ミルド及びその製造方法 |
JPH11279406A (ja) | 1998-03-30 | 1999-10-12 | Nippon Mitsubishi Oil Corp | 高熱伝導性シリコーンゴム組成物および熱伝導装置 |
JP2000192337A (ja) | 1998-12-21 | 2000-07-11 | Mitsubishi Chemicals Corp | 黒鉛質炭素繊維及びそれを用いた放熱シート |
JP2002146672A (ja) | 2000-11-06 | 2002-05-22 | Polymatech Co Ltd | 熱伝導性充填剤及び熱伝導性接着剤並びに半導体装置 |
JP2002535469A (ja) | 1999-01-29 | 2002-10-22 | クール オプションズ,インコーポレーテッド | 熱伝導性複合材料 |
JP2005072220A (ja) | 2003-08-25 | 2005-03-17 | Shin Etsu Chem Co Ltd | 放熱部材 |
WO2006112487A1 (ja) * | 2005-04-18 | 2006-10-26 | Teijin Limited | ピッチ系炭素繊維、マットおよびそれらを含む樹脂成形体 |
WO2006112516A1 (ja) * | 2005-04-19 | 2006-10-26 | Teijin Limited | 炭素繊維複合シート、その伝熱体用途およびそれに用いるピッチ系炭素繊維マット用シート |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4861653A (en) * | 1987-09-02 | 1989-08-29 | E. I. Du Pont De Nemours And Company | Pitch carbon fibers and batts |
JP3648865B2 (ja) | 1995-08-18 | 2005-05-18 | 三菱化学株式会社 | 炭素繊維の製造方法 |
JP4759122B2 (ja) | 2000-09-12 | 2011-08-31 | ポリマテック株式会社 | 熱伝導性シート及び熱伝導性グリス |
KR20090037948A (ko) * | 2006-07-28 | 2009-04-16 | 데이진 가부시키가이샤 | 열전도성 접착제 |
WO2008108482A1 (ja) * | 2007-03-06 | 2008-09-12 | Teijin Limited | ピッチ系炭素繊維、その製造方法および成形体 |
-
2008
- 2008-03-04 WO PCT/JP2008/054245 patent/WO2008108482A1/ja active Application Filing
- 2008-03-04 KR KR1020097010110A patent/KR20090117692A/ko not_active Application Discontinuation
- 2008-03-04 US US12/530,080 patent/US7846543B2/en not_active Expired - Fee Related
- 2008-03-04 EP EP08721661A patent/EP2128313A4/en not_active Withdrawn
- 2008-03-04 JP JP2009502636A patent/JPWO2008108482A1/ja not_active Withdrawn
- 2008-03-06 TW TW97107890A patent/TW200905028A/zh unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3648865A (en) | 1969-04-29 | 1972-03-14 | Corning Glass Works | Article handling |
JPH0785862A (ja) | 1993-09-17 | 1995-03-31 | Toshiba Corp | 二次電池用負極 |
JPH0790725A (ja) | 1993-09-17 | 1995-04-04 | Petoca:Kk | メソフェーズピッチ系炭素繊維ミルド及びその製造方法 |
JPH11279406A (ja) | 1998-03-30 | 1999-10-12 | Nippon Mitsubishi Oil Corp | 高熱伝導性シリコーンゴム組成物および熱伝導装置 |
JP2000192337A (ja) | 1998-12-21 | 2000-07-11 | Mitsubishi Chemicals Corp | 黒鉛質炭素繊維及びそれを用いた放熱シート |
JP2002535469A (ja) | 1999-01-29 | 2002-10-22 | クール オプションズ,インコーポレーテッド | 熱伝導性複合材料 |
JP2002146672A (ja) | 2000-11-06 | 2002-05-22 | Polymatech Co Ltd | 熱伝導性充填剤及び熱伝導性接着剤並びに半導体装置 |
JP2005072220A (ja) | 2003-08-25 | 2005-03-17 | Shin Etsu Chem Co Ltd | 放熱部材 |
WO2006112487A1 (ja) * | 2005-04-18 | 2006-10-26 | Teijin Limited | ピッチ系炭素繊維、マットおよびそれらを含む樹脂成形体 |
WO2006112516A1 (ja) * | 2005-04-19 | 2006-10-26 | Teijin Limited | 炭素繊維複合シート、その伝熱体用途およびそれに用いるピッチ系炭素繊維マット用シート |
Non-Patent Citations (1)
Title |
---|
See also references of EP2128313A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010024462A1 (ja) * | 2008-09-01 | 2010-03-04 | 帝人株式会社 | ピッチ系黒鉛化短繊維及びそれを用いた成形体 |
WO2010084856A1 (ja) * | 2009-01-20 | 2010-07-29 | 帝人株式会社 | ピッチ系炭素繊維ウェブ、ピッチ系炭素短繊維、およびその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2008108482A1 (ja) | 2010-06-17 |
EP2128313A4 (en) | 2010-08-04 |
TW200905028A (en) | 2009-02-01 |
EP2128313A1 (en) | 2009-12-02 |
US7846543B2 (en) | 2010-12-07 |
KR20090117692A (ko) | 2009-11-12 |
US20100104846A1 (en) | 2010-04-29 |
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