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    • 1. 发明申请
    • CARBON FIBER AND METHOD FOR PRODUCING THE SAME
    • 碳纤维及其制造方法
    • US20120058337A1
    • 2012-03-08
    • US13140711
    • 2009-12-17
    • Hiroshi SakuraiHiroshi HaraShoichi Takagi
    • Hiroshi SakuraiHiroshi HaraShoichi Takagi
    • D02G3/00C01B31/10
    • D01F9/145D01D5/0985Y10T428/2913
    • An object of the present invention is to provide a pitch carbon fiber having a decreased occurrence of cracking along the direction of the fiber axis of the pitch carbon fiber, which has conventionally occurred in a melt blowing method, and having high thermal conductivity.The invention is directed to a pitch carbon fiber having a melt mark recognized in the fiber corresponding to 60 to less than 100% of the cross-section of the fiber, and having a lattice spacing (d 002 value) of 0.3362 nm or less in the graphite layer and a crystallite size (Lc) of 60 nm or more derived from the thicknesswise direction, as determined by X-ray diffractometry. The pitch carbon fiber can be produced under specific conditions for spinning and infusibilization.
    • 本发明的目的在于提供一种沥青碳纤维,该沥青碳纤维沿着沥青碳纤维的纤维轴线的方向发生断裂,该方法通常以熔喷法形成,并具有高导热性。 本发明涉及一种沥青碳纤维,其纤维在纤维中被识别为对应于纤维横截面的60至小于100%,并且具有0.3362nm或更小的晶格间距(d 002值)为0.3362nm或更小 石墨层,并且通过X射线衍射测定,从厚度方向导出60nm以上的微晶尺寸(Lc)。 沥青碳纤维可以在纺丝和灌注的特定条件下生产。
    • 2. 发明申请
    • GRAPHITIZED SHORT FIBERS AND COMPOSITION THEREOF
    • GRAPHITIZED短纤维及其组合物
    • US20110284795A1
    • 2011-11-24
    • US13147130
    • 2010-01-27
    • Hiroshi SakuraiHiroki SanoHiroshi HaraShoichi Takagi
    • Hiroshi SakuraiHiroki SanoHiroshi HaraShoichi Takagi
    • C09K5/14D02G3/02D01F9/145D02G3/22
    • D01F9/145C08J5/042C08K7/06Y10T428/2918
    • Pitch-based graphitized short fibers formed from mesophase pitch as a raw material, having an average fiber diameter of 5 to 20 μm, a percentage (CV value) of a variance of a fiber diameter with respect to the average fiber diameter of 8 to 15%, a number average fiber length of 20 to 500 μm, and a crystallite size (La) derived from a growth direction of a hexagonal net plane of 30 nm or more, having graphene sheets that are closed upon observation of an end surface of a filler with a transmission electron microscope, and a substantially flat surface observed with a scanning electron microscope, and having an R value, which is a relative intensity ratio (ID/IG) of an intensity (ID) of a Raman band in the vicinity of 1,360 cm−1 to an intensity (IG) of a Raman band in the vicinity of 1,580 cm−1 measured by laser Raman spectroscopy, in a range of 0.01 to 0.07. The short fibers can be filled in a rubber composition at a high density without inhibition of curing of the rubber composition.
    • 由作为原料的中间相沥青形成的间距型石墨化短纤维,平均纤维直径为5〜20μm,纤维直径相对于平均纤维直径的方差的百分比(CV值)为8〜15 %,数均纤维长度为20〜500μm,由六方网状平面的生长方向衍生的微米尺寸(La)为30nm以上,具有石墨烯片,其在观察到 用扫描型电子显微镜观察到的基本上平坦的表面,并且具有作为拉曼带附近的强度(ID)的相对强度比(ID / IG)的R值, 通过激光拉曼光谱测定的1580cm -1附近的拉曼带的强度(IG)为1360cm -1,为0.01〜0.07。 短纤维可以以高密度填充在橡胶组合物中,而不会抑制橡胶组合物的固化。