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1. 发明授权

US5124010A Carbon fibers having modified surfaces and process for producing the same 失效
标题翻译：具有改性表面的碳纤维及其制造方法
公开(公告)号：US5124010A
公开(公告)日：1992-06-23
申请号：US447857
申请日：1989-12-08
申请人： Fujio Nakao , Naoki Sugiura
发明人： Fujio Nakao , Naoki Sugiura
IPC分类号： D01F11/16
CPC分类号： D01F11/16
摘要： A process is disclosed for producing carbon fibers with modified surfaces by electrolytic treatment. In the process, electric current is passed between carbon fibers and a counter electrode in an electrolytic solution to which an aromatic compound having at least one hydroxyl group and/or amino group is added.

2. 发明授权

US4814157A Carbon fibers and method for producing same 失效
标题翻译：碳纤维及其制造方法
公开(公告)号：US4814157A
公开(公告)日：1989-03-21
申请号：US012494
申请日：1987-02-09
申请人： Hirofumi Uno , Hajime Asai , Fujio Nakao
发明人： Hirofumi Uno , Hajime Asai , Fujio Nakao
IPC分类号： D06M10/00 , D01F9/22 , D06M101/00 , D06M101/40
CPC分类号： D01F9/22
摘要： Disclosed are polyacrylonitrile carbon fibers excellent in substrate strength and adhesion to matrix resin wherein average nitrogen content in the whole carbon fibers which is measured by elementary analysis is 0.5-4.5% by weight and average nitrogen concentration (N/C atom number ratio) in the whole carbon fibers which is measured by elementary analysis and surface silicon concentration (Si.sub.2p /C.sub.1s atom number ratio), surface nitrogen concentration (N.sub.1s /C.sub.1s atom number ratio) and surface oxygen concentration (O.sub.1s /C.sub.1s atom number ratio) which are measured by X-ray photoelectron spectroscopy satisfy the following formulas:0.ltoreq.Si.sub.2p /C.sub.1s .ltoreq.0.020.67 N/C+0.08.ltoreq.O.sub.1s /C.sub.1s -2 Si.sub.2p /C.sub.1s .ltoreq.0.40.ltoreq.N.sub.1s /C.sub.1s -N/C.ltoreq.0.04and method for producing the carbon fibers.
摘要翻译：公开了基材强度和基体树脂粘合性优异的聚丙烯腈碳纤维，其中通过元素分析测定的全碳纤维中的平均氮含量为0.5-4.5重量％，平均氮浓度（N / C原子数比）通过元素分析和表面硅浓度（Si2p / C1s原子数比），表面氮浓度（N1s / C1s原子数比）和表面氧浓度（O1s / C1s原子数比）测量的全碳纤维，其通过X 射线光电子能谱满足下列公式：0 <= Si2p / C1s

3. 发明授权

US4867852A Electrolytic method for after-treatment of carbon fiber 失效
标题翻译：电解碳纤维后处理方法
公开(公告)号：US4867852A
公开(公告)日：1989-09-19
申请号：US204262
申请日：1988-06-09
申请人： Fujio Nakao , Nobuyuki Yamamoto , Katumi Anai
发明人： Fujio Nakao , Nobuyuki Yamamoto , Katumi Anai
IPC分类号： D01F11/12 , C25
CPC分类号： D01F11/122
摘要： A method for after-treatment of carbon fiber, which comprises by electrolytic oxidation treatment in an aqueous solution having an ammonium ion concentration of 0.2 to 4.0 mol/l and a pH of at least 7 using the carbon fiber as an anode, followed by treating the resulting fiber in water with an ultrasonic wave of at least 20 kHz frequency at an intensity satisfying the condition: ##EQU1## wherein, F is the frequency (kHz) and T is the treatment period (min) provided that T>0.1.
摘要翻译：一种碳纤维的后处理方法，其特征在于，使用碳纤维作为阳极，通过在0.2〜4.0mol / l的铵离子浓度和pH为7以上的水溶液中进行电解氧化处理，所得到的纤维在水中具有至少20kHz频率的超声波，强度满足条件：其中，F是频率（kHz），T是处理周期（min），条件是T> 0.1。

4. 发明授权

US4735693A Process for producing carbon fiber 失效
标题翻译：碳纤维生产工艺
公开(公告)号：US4735693A
公开(公告)日：1988-04-05
申请号：US899797
申请日：1986-08-26
申请人： Hajime Asai , Fujio Nakao
发明人： Hajime Asai , Fujio Nakao
IPC分类号： G01N27/48 , G01N27/50
CPC分类号： G01N27/48
摘要： A method for detecting the surface characteristic of a carbon fiber, which comprises making the carbon fiber travel through an electrolyte solution, applying an electric potential in said solution between the carbon fiber serving as a working electrode and a counter electrode provided in the solution, said potential being varied continuously within a range of potential not higher than the standard electrode potential, and detecting continuously the resulting charnge of intensity of electric current, and a process for producing a carbon fiber giving a high interfacial bond strength between the fiber and matrix resin, which comprises making the carbon fiber have a constant surface characteristic by application of the above-mentioned detection method.
摘要翻译：一种碳纤维的表面特性检测方法，其特征在于，使碳纤维通过电解质溶液，在作为工作电极的碳纤维和设置在溶液中的对置电极之间的溶液中施加电位，电位在不高于标准电极电位的电位范围内连续变化，连续检测所得到的电流强度，以及在纤维与基体树脂之间产生高界面结合强度的碳纤维的制造方法，其包括通过应用上述检测方法使碳纤维具有恒定的表面特性。

5. 发明授权

US4839006A Surface treatment process for carbon fibers 失效
标题翻译：碳纤维表面处理工艺
公开(公告)号：US4839006A
公开(公告)日：1989-06-13
申请号：US199453
申请日：1988-05-27
申请人： Fujio Nakao , Hirofumi Uno
发明人： Fujio Nakao , Hirofumi Uno
IPC分类号： C25D11/34 , D01F11/16
CPC分类号： D01F11/16 , C25D11/34
摘要： A process for surface treatment of carbon fiber of which modulus is not lower than 30 ton/mm.sup.2, in two steps, which comprises the steps of subjecting a carbon fiber as an anode to a first electrolytic treatment in an aqueous solution of inorganic acidic electrolyte or of neutral salt electrolyte, and then subjecting the treated fiber to a second electrolytic treatment in an aqueous solution of ammonium salt of carbonic acid or of inorganic alkaline electrolyte.

6. 发明授权

US4603157A Intermediate for composite material 失效
标题翻译：复合材料中间体
公开(公告)号：US4603157A
公开(公告)日：1986-07-29
申请号：US735749
申请日：1985-05-20
申请人： Hajime Asai , Fujio Nakao
发明人： Hajime Asai , Fujio Nakao
IPC分类号： B29C70/10 , C08J5/04 , C08J5/24 , C08K3/04
CPC分类号： C08J5/24 , B29C70/10 , C08J5/042 , B29K2307/00 , C08J2363/00 , Y10T428/30
摘要： An intermediate for composite materials which comprises a carbon fiber or a graphite fiber having a tensile strength of 300 to 600 kg/mm.sup.2 and a tensile modulus of 30 to 50 t/mm.sup.2 and giving an intensity of electric current per unit surface area as determined by a potential sweep method in the range of 0.1 to 0.4 .mu.A/cm.sup.2 and a matrix resin.
摘要翻译：一种复合材料的中间体，其包含抗拉强度为300〜600kg / mm 2的碳纤维或石墨纤维，拉伸弹性模量为30〜50t / mm 2，并赋予每单位表面积的电流强度，由 0.1〜0.4μA/ cm 2的电位扫描法和基质树脂。

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