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1. 发明授权

US4775589A Coaltar pitch based carbon fiber having high Young's modulus 失效
标题翻译：具有高杨氏模量的直馏沥青基碳纤维
公开(公告)号：US4775589A
公开(公告)日：1988-10-04
申请号：US880976
申请日：1986-07-01
申请人： Takeshi Hamada , Tokuhiko Nishida , Yasunori Sajiki , Mitsuaki Matsumoto
发明人： Takeshi Hamada , Tokuhiko Nishida , Yasunori Sajiki , Mitsuaki Matsumoto
IPC分类号： D01F9/15 , D01F9/155 , B32B9/00 , D01F9/12 , D02G3/00
CPC分类号： D01F9/15 , D01F9/155 , Y10T428/2918 , Y10T428/2973
摘要： This invention relates to a coaltar pitch based carbon fiber having a high Young's modulus produced by using coaltar pitch as a starting material, which has a microstructure with a preferred orientation parameter (HWHM) of 10.degree. or less, a crystallite size (Lc(002)) of not more than 25 nm and not less than 18 nm and an interlayer spacing (d002) of not more than 0.345 nm and not less than 0.338 nm as determined by X-ray diffraction, and has a magnetoresistance of less than -0.40% and not less than -2.00% as measured by applying a magnetic field of 10 KG perpendicular to the fiber axis at liquid nitrogen temperature, and a Young's modulus of 55 ton.multidot.mm.sup.-2 or more, preferably 75 ton.multidot.mm.sup.-2 or more. The carbon fiber of this invention has a high Young's modulus, is flexible, and does not split in the fiber axis direction, and therefore it is easy to handle, is good in workability, and contributed also to improvement of the production efficiency. Further, when the carbon fiber of this invention is used in composite material, the resulting composite material can be expected to have an improved impact strength and hence can be used for various purposes.
摘要翻译：本发明涉及以直径为原料制造的具有高杨氏模量的直立沥青基碳纤维，其具有优选取向参数（HWHM）为10以下的微结构，微晶尺寸（Lc（002））），通过X射线衍射测定为不大于25nm且不小于18nm，层间距（d002）不大于0.345nm且不小于0.338nm，并且具有小于-0.40的磁电阻通过在液氮温度下垂直于纤维轴施加10Kg的磁场，并且杨氏模量为55吨×2mm以上，优选为75吨×2mm以上的杨氏模量测定的百分比不小于-2.00％。本发明的碳纤维具有高的杨氏模量，柔软性，并且在纤维轴线方向上不分裂，因此易于处理，加工性好，并且还有助于提高生产效率。此外，当本发明的碳纤维用于复合材料时，可以预期所得的复合材料具有改进的冲击强度，因此可用于各种目的。

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