-
公开(公告)号：US4826569A
公开(公告)日：1989-05-02
申请号：US99899
申请日：1987-09-22
申请人： Tomohito Ito , Renichi Isomura , Hidetoshi Hirai , Fukuo Gomi
发明人： Tomohito Ito , Renichi Isomura , Hidetoshi Hirai , Fukuo Gomi
CPC分类号： C22C47/025 , B03C5/02 , C04B35/80 , C22C47/00 , D21H13/36 , B22F2998/00
摘要： The feature of the present invention is that a fiber mixture of silicon carbide or silicon nitride whiskers and alumina or alumina-silica short fibers with 1 to 45 volume percent of the short fibers in relation to the total volume of the whiskers and short fibers is used in the following steps for producing a fiber aggregate: a dispersion step of dispersing whiskers and short fibers into a dielectric fluid; an orientation step of placing the dielectric fluid containing the fibers dispersed therein in a space between a positive electrode and a negative electrode across which a high voltage is applied, whereby causing individual fibers in the dielectric fluid to electrostatically orient, with one end pointing to the positive electrode and the other end pointing to the negative electrode; and an aggregating step of aggregating the electrostatically oriented fibers while keeping the oriented step. The fiber mixture is used in order to grow the bridgings of whiskers around the short fibers as cores. Thus the fiber sedimentation is accelerated by densely bridged fibers while maintaining a satifactory orientation. Hence a whisker aggregate with a larger fiber volume ratio Vf can be formed in a shorter period of time.
摘要翻译： 本发明的特征是使用碳化硅或氮化硅晶须的纤维混合物和相对于晶须和短纤维总体积的1至45体积％的短纤维的氧化铝或氧化铝 - 二氧化硅短纤维 在生产纤维聚集体的以下步骤中：将晶须和短纤维分散在介质流体中的分散步骤; 将包含分散在其中的纤维的介质流体放置在施加高电压的正极和负极之间的空间中的取向步骤，由此使电介质流体中的各个纤维静电取向，一端指向 正极，另一端指向负极; 以及在保持定向步骤的同时聚集静电取向纤维的聚集步骤。 使用纤维混合物以便在短纤维周围生长作为核心的晶须的桥接。 因此，纤维沉降通过密集桥接纤维加速，同时保持饱和取向。 因此，可以在更短的时间内形成具有较大纤维体积比Vf的晶须聚集体。
-
公开(公告)号：US4938844A
公开(公告)日：1990-07-03
申请号：US177467
申请日：1988-04-01
申请人： Tomohito Ito , Hidetoshi Hirai , Renichi Isomura , Fukuo Gomi , Senichi Masuda
发明人： Tomohito Ito , Hidetoshi Hirai , Renichi Isomura , Fukuo Gomi , Senichi Masuda
IPC分类号： D04H1/74 , C22C47/00 , C22C47/02 , C22C47/06 , D01D10/00 , D06M10/00 , D21F13/00 , D21H13/48
摘要： The present invention relates to a process for producing fiber aggregate which includes an orientation step of placing the dielectric fluid containing fibers in the form of short fiber, whisker, or a mixture thereof dispersed therein in a space between a pair of electrodes across which an AC voltage is applied, whereby causing individual fibers in the dielectric fluid to electrostatically orient, with one end pointing to one of electrodes and the other end pointing to the other electrode; and an aggregating step of aggregating the electrostatically oriented fibers while keeping the oriented step, whereby producing fiber aggregate in which the fibers are substantially one-dimensionally oriented.
摘要翻译： 本发明涉及一种生产纤维聚集体的方法，该方法包括将包含短纤维，晶须或其混合物的纤维的介质流体放置在一对电极之间的空间中的定向步骤，AC 施加电压，由此使电介质流体中的各个纤维静电取向，一端指向电极之一，另一端指向另一个电极; 以及聚集步骤，在保持定向步骤的同时聚集静电取向纤维，由此生产其中纤维基本上一维取向的纤维聚集体。
-
公开(公告)号：US4975149A
公开(公告)日：1990-12-04
申请号：US273981
申请日：1988-11-21
申请人： Tomohito Ito , Fukuo Gomi , Renichi Isomura
发明人： Tomohito Ito , Fukuo Gomi , Renichi Isomura
IPC分类号： C22C47/08
CPC分类号： C22C47/08
摘要： The present invention relates to a process for producing fiber aggregate which comprises a dispersion step of dispersing fibers in the form of short fiber, whisker, or a mixture thereof into a dielectric fluid; an orientation step of placing the dielectric fluid containing said fibers dispersed therein in a space between a positive electrode and a negative electrode across which a high voltage is applied, whereby causing individual fibers in the dielectric fluid to electrostatically orient, with one end pointing to the positive electrode and the other end pointing to the negative electrode; and an aggregating step of aggregating the statically oriented fibers while keeping the oriented step, whereby producing fiber aggregate in which said fibers are mostly one-dimensionally oriented. Small amounts of surface active agent in the dielectric liquid promote fiber orientation in addition to dispersing the fibers.
-
公开(公告)号：US4786366A
公开(公告)日：1988-11-22
申请号：US945532
申请日：1986-12-19
申请人： Tomohito Ito , Fukuo Gomi , Renichi Isomura
发明人： Tomohito Ito , Fukuo Gomi , Renichi Isomura
CPC分类号： C22C47/08
摘要： The present invention relates to a process for producing fiber aggregate which comprises a dispersion step of dispersing fibers in the form of short fiber, whisker, or a mixture thereof into a dielectric fluid; an orientation step of placing the dielectric fluid containing said fibers dispersed therein in a space between a positive electrode and a negative electrode across which a high voltage is applied, whereby causing individual fibers in the dielectric fluid to statistically orient, with one end pointing to the positive electrode and the other end pointing to the negative electrode; and an aggregating step of aggregating the statically oriented fibers while keeping the oriented step, whereby producing fiber aggregate in which said fibers are mostly one-dimensionally oriented.
摘要翻译： 本发明涉及一种生产纤维聚集体的方法，该方法包括将纤维以短纤维，晶须或其混合物的形式分散在介质流体中的分散步骤; 将包含分散在其中的纤维的介质流体放置在施加高电压的正极和负极之间的空间中的定向步骤，由此使电介质流体中的各个纤维统计地定向，其中一端指向 正极，另一端指向负极; 以及聚集步骤，在保持定向步骤的同时聚集静电取向纤维，由此生产纤维聚集体，其中所述纤维主要是一维取向的。
-
公开(公告)号：US5059107A
公开(公告)日：1991-10-22
申请号：US489200
申请日：1990-03-06
CPC分类号： D21H13/36 , B01D21/0009 , B01D21/0012 , B01D21/262
摘要： An apparatus for producing annular fiber aggregate includes: a container including an inner cylinder and an outer cylinder disposed concentrically, whereby forming an upright cylindrical space between the inner cylinder and the outer cylinder; at least a pair of positive electrode and negative electrode disposed by turns and buried in the wall of the outer cylinder, parallely with respect to the axis of the upright cylindrical space; a filter member disposed at the lower portion of the upright cylindrical space; and a voltage applicator connected to the positive electrodes and the negative electrodes. Since the apparatus has the positive and negative electrodes buried in the wall of the outer cylinder, the fibers are hardly disturbed and lifted by the positive and negative electrodes even when the positive and negative electrodes are rotated relatively around the axis of the upright cylindrical space. Thus, a fiber aggregate can be obtained in which the fibers are oriented in the peripheral tangent direction uniformly and favorably, and the strength thereof in the direction perpendicular to the peripheral tangent direction has been further enhanced.
-
公开(公告)号：US4874495A
公开(公告)日：1989-10-17
申请号：US99900
申请日：1987-09-22
申请人： Tomohito Ito , Renichi Isomura , Hidetoshi Hirai , Fukuo Gomi
发明人： Tomohito Ito , Renichi Isomura , Hidetoshi Hirai , Fukuo Gomi
CPC分类号： C22C47/025 , B03C5/02 , C04B35/80 , C22C47/00 , D21H13/36 , B22F2998/00
摘要： A fiber aggregate in which many of the fibers are oriented in the tangent direction of the circumference satisfactorily can be produced by a process and an apparatus according to the present invention. The best feature of the present invention is the following arrangement for a plurality of electrodes used in a process and an apparatus according to the present invention. Vertically extending foil, net or needle-shaped electrodes for orienting the fibers electrostatically are disposed alternately along the circumference of the vertically cylindrical space so as to divide the vertically cylindrical space into equal parts. In addition to this arrangement, the plurality of electrodes may be rotated as well as moved vertically in order not to disturb the fiber aggregation. A fiber aggregate obtained by the present invention has an improved strength and anti-thermal properties.
摘要翻译： 可以通过根据本发明的方法和装置来制造其中许多纤维沿圆周切线方向定向的纤维聚集体。 本发明的最佳特征是在根据本发明的方法和装置中使用的多个电极的以下布置。 垂直延伸的箔，网状或针状电极用于使静电的纤维定向，沿着垂直圆柱形空间的圆周交替布置，以将垂直圆柱形空间分成相等的部分。 除了这种布置之外，多个电极可以旋转并且垂直移动，以便不干扰光纤聚集。 通过本发明获得的纤维聚集体具有改进的强度和抗热性能。
-
公开(公告)号：US4752202A
公开(公告)日：1988-06-21
申请号：US3032
申请日：1987-01-13
申请人： Fukuo Gomi , Tomohito Ito , Renichi Isomura
发明人： Fukuo Gomi , Tomohito Ito , Renichi Isomura
CPC分类号： C22C47/025 , B22F3/002 , C22C47/00 , B22F2998/00 , Y10S428/91
摘要： The present invention relates to an apparatus for continuously producing one-dimensionally oriented fiber aggregate in which an orientation vessel includes a case, a supply portion, an orientation portion, a discharge portion, at least one pair of electrodes disposed on the orientation portion of the vessel, and a sheet drive unit. A dielectric fluid in which whiskers and/or short fibers are dispersed is supplied downwardly, and the fibers oriented one-dimensionally by means of high voltage applied across electrodes disposed in an orientation vessel. The sheet drive unit moves a long filter sheet disposed horizontally between the orientation portion and the discharge portion of the orientation vessel to enable the dielectric liquid to pass the filter sheet to the discharge portion of the vessel, and permitting the fibers to aggregate on the sheet.
摘要翻译： 本发明涉及一种用于连续制造一维取向纤维集合体的装置，其中取向容器包括壳体，供应部分，取向部分，排出部分，至少一对电极设置在 容器和片材驱动单元。 其中分散有晶须和/或短纤维的介质流体被向下供应，并且纤维通过施加在设置在定向容器中的电极上的高电压一维定向。 片材驱动单元移动在取向部分和定向容器的排出部分之间水平布置的长过滤片，使得介电液体能够将过滤片通过到容器的排出部分，并允许纤维在片材上聚集 。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.015 秒)
