Mitsubishi Rayon Company, Limited

Mitsuo Hamada

Yoshihiko Hosako

Hidehiko Ohashi

Makoto Nakamura

Kazushige Mihara

Teruyuki Yamada

Tomoyoshi Chiba

Seiji Hayashi

Yoshitaka Kageyama

Toshihiko Nishida

Takahiro Okuya

Takeaki Amakawa

Tatsuzi Shimizu

An object of the present invention is to provide an apparatus and a method for manufacturing a windable carbonaceous material sheet, which is obtained by continuously curing a long uncured fiber sheet which is obtained by using short fibers to make paper and which contains uncured resin to produce a resin-impregnated cured sheet, and then continuously carbonizing it, and its production process. For the object, a long uncured fiber sheet () is conveyed by conveyance means which is equipped with one rotation belt set () comprising a drive roll (), a follower roll (), and an endless belt () which is put on and around these rolls (). A resin-impregnated cured sheet () is produced by heating and pressurizing the uncured fiber sheet () by resin curing means () which is arranged so as to nip the uncured fiber sheet through the endless belt (). Further, the resin-impregnated cured sheet is continuously conveyed in a horizontal direction, and then is carbonized by the apparatus for manufacturing a carbonaceous material sheet which is equipped with a carbonization treatment chamber for carbonizing a carbonizing material and guide rolls which are provided in the carbonization treatment chamber, so that a carbonaceous material sheet is continuously produced. Then, this is wound up. Accordingly, production efficiency is remarkably improved, and its handling property and conveying property are excellent.

Apparatus and method for manufacturing resin-impregnated cured sheet, and apparatus and method for manufacturing carbonaceous material sheet

A carbon fiber paper including carbon fibers having a surface area ratio of 1.05 or more, and a porous carbon electrode substrate for a fuel cell having this carbon fiber paper as a constituent. The electrode substrate for a fuel cell has carbon fibers uniformly dispersed therein and is flexible. The carbon fiber paper is suitable for production of the electrode substrate.

Carbon fiber paper and porous carbon electrode substrate for fuel cell therefrom

The present invention provides carbon fiber paper consisting of an organic high-molecular compound as a binder and carbon fibers, characterized in that the carbon fibers contain thin fibers with an average diameter smaller than 5 &#x3bc;m and an average fiber length of 3 to 10 mm; a porous carbon electrode substrate for a fuel cell having a thickness of 0.05 to 0.5 mm and a bulk density of 0.3 to 0.8 g/cm, also having a bending strength of 10 MPa or higher and a deflection of 1.5 mm or more at the time of bending, measured by a three-point bending test in conditions of using a sample width of 1 cm, a strain rate of 10 mm/min, and a distance between supporting points of 2 cm; and a method of producing a porous carbon electrode substrate for a fuel cell by impregnating the carbon fiber paper with a thermosetting resin, curing the thermosetting resin by heating and pressing treatment, and then carbonizing the paper.

Porous carbon electrode substrate and its production method and carbon fiber paper

Porous carbon electrode material, method for manufacturing the same, and carbon fiber paper

This invention relates to an acrylonitrile-based precursor fiber for carbon fiber which is prepared from an acrylonitrile-based copolymer containing 96.0 to 98.5% by weight of acrylonitrile units, and which is characterized by a tensile strength of not less than 7.0 cN/dtex, an elastic modulus in tension of not less than 130 cN/dtex, an iodine adsorption of not greater than 0.5% by weight based on the weight of the fiber, a degree of crystal orientation (&pgr;) of not less than 90% as determined by wide-angle X-ray analysis, and a degree of variation in tow fineness of not greater than 1.0%. This precursor fiber has a high strength, a high elastic modulus, a high degree of denseness, a high degree of orientation, and a low degree of variation in tow fineness, and can hence be used to form a high-quality carbon fiber inexpensively by oxidation for a shorter period of time.

Acrylonitrile-based precursor fiber for carbon fiber and method for production thereof

An electric double layer capacitor containing a polymer gel electrolyte layer provided between polarizable electrodes, wherein the polymer gel electrolyte layer contains a nonaqueous electrolytic solution, and a fibrous sheet material containing mainly a fiber or pulp material capable of forming a polymer gel with the nonaqueous electrolytic solution.

Electric double layer capacitor and method for preparing the same

This invention relates to an acrylonitrile-based precursor fiber for the formation of a carbon fiber which is obtained by spinning an acrylonitrile-based copolymer (which contains not less than 90% by weight of acrylonitrile units as monomeric components, contains 5.0&times;10,to 2.0&times;10,equivalent/g of carboxylic acid groups and not less than 0.5&times;10,equivalent/g of sulfate groups and/or sulfonic groups, and has protons and/or ammonium ions as counter ions to the carboxylic acid groups, sulfate groups and sulfonic groups) and treating the resulting coagulated filament, wherein the amount of iodine adsorbable to the acrylonitrile-based precursor fiber is not greater than 0.8% by weight based on the weight of the fiber. By using this precursor fiber, a carbon fiber having a high strength and a high elastic modulus can be easily formed.

Acrylonitrile-based precursor fiber for the formation of carbon fiber, process for preparing same, and carbon formed from same

The present invention provides a unique fibrous sheet for forming a polymer gel electrolyte having ion conductivity, a unique polymer gel electrolyte using such a sheet, and a unique method for the manufacture thereof. More specifically, the present invention provides a unique fibrous sheet for forming a polymer gel electrolyte having excellent ion conductivity and suitable as an electrolyte for various electronic devices such as lithium primary batteries, lithium secondary batteries, and electric double layer capacitors, as well as a unique polymer gel electrolyte using such a sheet, and also a unique method for the manufacture thereof.

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Hiroshima, Japan

Mitsuo Hamada