The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

The present application relates to a sizing agent composition, a carbon fiber material and a composite material. The sizing agent composition comprises specific compositions, thereby producing a sizing agent having emulsion droplets with specific diameter. The sizing agent has excellent emulsion stability, and it can efficiently improve hygroscopicity and dimensional stability of the carbon fiber material. Besides, the sizing agent can improve bonding properties between the carbon fiber material and resin matrix, therefore enhancing properties of the composite material.

The present application relates to a sizing agent composition, a carbon fiber material and a composite material. The sizing agent composition comprises specific compositions, thereby producing a sizing agent having emulsion droplets with specific diameter. The sizing agent has excellent emulsion stability, and it can efficiently improve hygroscopicity and dimensional stability of the carbon fiber material. Besides, the sizing agent can improve bonding properties between the carbon fiber material and resin matrix, therefore enhancing properties of the composite material.

The purpose of the instant invention is to provide a superfine carbon fiber thread with excellent bending strength and repeated bending. To achieve this purpose, (1) a desired composite thread is produced by opening open carbon fibers, slitting the opened fibers, twisting the slit fibers and forming a composite with a composite thread; and (2) a composite thread is produced by performing a lamination process with a film (film of composite materials) while performing a fiber-opening process, and then slitting, twisting and heating the tread for stress relief.

The purpose of the instant invention is to provide a superfine carbon fiber thread with excellent bending strength and repeated bending. To achieve this purpose, (1) a desired composite thread is produced by opening open carbon fibers, slitting the opened fibers, twisting the slit fibers and forming a composite with a composite thread; and (2) a composite thread is produced by performing a lamination process with a film (film of composite materials) while performing a fiber-opening process, and then slitting, twisting and heating the tread for stress relief.

The present invention provides: a fibrous carbon characterized in that the average effective fiber length is 1-100 μm, and the crystallite length (La) measured using X-ray diffraction is 100-500 nm; an electrode mixture layer for a non-aqueous-electrolyte secondary cell, said mixture comprising an electrode active material and a carbon-based electroconductive auxiliary agent containing said fibrous carbon; an electrode for a non-aqueous-electrolyte secondary cell, the electrode comprising a collector and said electrode mixture layer for a non-aqueous-electrolyte secondary cell, the electrode mixture layer being laminated on the collector; and a non-aqueous-electrolyte secondary cell having said electrode for a non-aqueous-electrolyte secondary cell.

The present invention provides: a fibrous carbon characterized in that the average effective fiber length is 1-100 μm, and the crystallite length (La) measured using X-ray diffraction is 100-500 nm; an electrode mixture layer for a non-aqueous-electrolyte secondary cell, said mixture comprising an electrode active material and a carbon-based electroconductive auxiliary agent containing said fibrous carbon; an electrode for a non-aqueous-electrolyte secondary cell, the electrode comprising a collector and said electrode mixture layer for a non-aqueous-electrolyte secondary cell, the electrode mixture layer being laminated on the collector; and a non-aqueous-electrolyte secondary cell having said electrode for a non-aqueous-electrolyte secondary cell.

Provided herein are high throughput continuous or semi-continuous reactors and processes for manufacturing expanded graphite materials. Such processes are suitable for manufacturing expanded graphite materials with little batch-to-batch variation.

A method and apparatus for manufacturing a carbon fiber. Pressure is applied to a filament to change a cross-sectional shape of the filament and create a plurality of distinct surfaces on the filament. The filament is converted into a graphitic carbon fiber having the plurality of distinct surfaces. A plurality of sizings is applied to the plurality of distinct surfaces of the graphitic carbon fiber in which the plurality of sizings includes at least two different sizings.

Embodiments of the present disclosure relate to a process for making a carbon nanomaterial fiber product and/or textile product. Such products may have new and/or enhanced properties as compared to similar products and, according to the embodiments of the present disclosure, it is less expensive to make.