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公开(公告)号：JP2001049536A
公开(公告)日：2001-02-20
申请号：JP21988499
申请日：1999-08-03
Applicant: TORAY INDUSTRIES
Inventor： ENDO MAKOTO , HIRAMATSU TORU , NAKAJIMA HIROTAKA
IPC: D01F9/22
Abstract: PROBLEM TO BE SOLVED: To obtain carbon fiber that has excellent handleability and resin impregnating ability on the formation of composite material by forming acrylic fibers, doubling and entangling them, making them resistant to flame and subjecting the flame-resistant fibers to carbonization treatment. SOLUTION: An acrylic fiber tow of a largely thick denier comprising 4,400-30,000 filaments of 0.5-2 denier fineness is formed and wound up tentatively. Then, a plurality of tows, for example, 2 to 8 tows are combined, then entangled through the hook-dropping technique until the entangling value attains to 5-100/m, in other words, substantially no twist, to form one bundle of filament tow. Then, the tow is heat-treated at 200-300 deg.C in an oxidative atmosphere, for example, in the air, to make the tow resistant to flame, the flame-resistant tow is subjected to the pre-carbonization treatment in an inert atmosphere, for example, in nitrogen or argon atmosphere at 300-600 deg.C, followed by the post-carbonization treatment in addition, at 1,000-1,500 deg.C thereby producing carbon fibers.
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公开(公告)号：JPH11200159A
公开(公告)日：1999-07-27
申请号：JP1779198
申请日：1998-01-14
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO TAKASHI , TAZAKI SHUICHI , ENDO MAKOTO
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a carbon fiber in baking plural small tows obtained by dividing a precausor fiber bundle in width direction, capable of continuously obtain the desired carbon fiber by simply and stably exchanging the precausor fiber bundle. SOLUTION: This method for producing a carbon fiber is provided by traveling plural small tows having >=30,000 denier total fiber thickness continuously, joining each of the small tows with each of the plural small tows having >=30,000 denier total fiber thickness obtained by dividing another precausor fiber bundle in width direction and then baking. In the carbon fiber production device having the above joining process, the joining process has plural guiding rolls 3 and 5, and among them at least one guiding roll is constituted as a movable guiding roll capable of temporarily stopping the traveling of the precausor fiber bundle 2 positioned at the upstream side to the guide roll.
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公开(公告)号：JPH09241931A
公开(公告)日：1997-09-16
申请号：JP4713196
申请日：1996-03-05
Applicant: TORAY INDUSTRIES
Inventor： SUEHIRO TAKEO , ENDO MAKOTO , OZAKI KEIICHIRO
Abstract: PROBLEM TO BE SOLVED: To obtain a graphite fiber at high productivity, having a high strength by traveling the fiber to be graphitized and containing a silicon compound within a rectangular cylindrical muffle under a specific condition, while suppressing the growth of silicon carbide. SOLUTION: This graphite fiber is obtained by traveling a fiber 2 to be graphitized and containing a silicon compound such as silicone within a rectangular cylindrical muffle 4 having an inert atmosphere at 2200-3000 deg.C while keeping 5-50mm, preferably 5-25mm distance between the upper wall of the muffle 4 and the fiber to be graphitized. A damage to the fiber or a cutting of the fiber due to attaching to the muffle and the falling off of an accumulated silicon carbide can be suppressed.
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公开(公告)号：JPH07292526A
公开(公告)日：1995-11-07
申请号：JP8160494
申请日：1994-04-20
Applicant: TORAY INDUSTRIES
Inventor： YOSHINO CHIKASUKE , ENDO MAKOTO , KOBAYASHI MAKOTO
IPC: D01F9/22
Abstract: PURPOSE:To provide a method for mass-producing carbon fibers from acrylic fibers as a base in a short time with good productivity while suppressing the deterioration in strength or elastic modulus in carbonization. CONSTITUTION:This method for producing carbon fibers is to heat-treat acrylic fibers comprising >=85wt.% acrylonitrile and =8vol.% oxygen concentration and subsequently carry out the carbonization treatment in nitrogen at 1400 deg.C.
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公开(公告)号：JPH0681223A
公开(公告)日：1994-03-22
申请号：JP23101592
申请日：1992-08-31
Applicant: TORAY INDUSTRIES
Inventor： NARITA ISAO , ENDO MAKOTO , SANO TAKAO
Abstract: PURPOSE:To remarkably increase the heat-removing rate, considerably shorten the flame-resisting treatment time without deteriorating the properties of the product and produce a carbon fiber in high productivity by heating a yarn of polyacrylonitrile precursor fibers in opened state at a specific yarn occupancy to effect the flame-resisting treatment and carbonizing the product. CONSTITUTION:A polyacrylonitrile precursor fiber yarn 1 composed of 1,000,000 filaments having single fiber denier of 1d is made to contact with a vibration guide 3 and opened in a state to attain a yarn occupancy of the precursor fiber 1 of 0.1-20% while applying vertical vibration to the yarn in a direction perpendicular to the moving direction of the yarn. Hot air is passed perpendicular to the precursor fiber 1 at a flow rate of 2m/s in this opening process in hot-air circulation flame-resisting treatment apparatuses 4, 4', 4'' and the yarn is subjected to the flame-resisting treatment in three stages at 253 deg.C in the 1st furnace 4, 262 deg.C in the 2nd furnace 4' and 272 deg.C in the 3rd furnace 4''. The flame-resistant fiber is carbonized in nitrogen atmosphere at 1400 deg.C to obtain the objective carbon fiber in high productivity and considerably shortened flame- resisting treatment time at a remarkably increased heat-removing rate.
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Patent Agency Ranking
公开(公告)号：JP2001192937A
公开(公告)日：2001-07-17
申请号：JP2000000712
申请日：2000-01-06
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO TAKASHI , ENDO MAKOTO
Abstract: PROBLEM TO BE SOLVED: To provide a method of stably producing a highly oriented high- performance carbon fiber. SOLUTION: This method for producing carbon fiber comprises the following process: acrylonitrile-based precursor fiber bundles having a total fineness of 30,000-500,000 dtex are subjected to flameproofing treatment at a temp. of 200-250 deg.C in an oxidative atmosphere followed by carbonization treatment at a temp. of 300-1,500 deg.C in an inert atmosphere; wherein the filament yarns 1.1-1.2 g/cm3 in density put in the flameproofing early stage during the above flameproofing treatment operation is drawn by a factor of 1.05-1.2.
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公开(公告)号：JPH11229241A
公开(公告)日：1999-08-24
申请号：JP4900798
申请日：1998-02-13
Applicant: TORAY INDUSTRIES
Inventor： TAZAKI SHUICHI , OKAMOTO TAKASHI , ENDO MAKOTO
Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method of carbon fibers capable of inhibiting wrapping caused from end breakage or fluff in calcination process for providing carbon fibers excellent in quality at the same time, by standing up tows under standing up from the surface of the tows shaken off to a can while traversing without bending, twisting, heaping between small tows and unevenness of thickness in the carbon fiber manufacturing process, in order to supply a tow having the resolving properties such as vertically standing up from the can, by dividing it into small tows to make use in calcination process. SOLUTION: This carbon fiber manufacturing method in which an acrylic synthetic fiber tow traversed and contained in a container, is set to stand up vertically, trimmed with a tow trimming guide, and is divided into small sized tows for subsequent incineration, the relations of the width of the traverse X (m) in the two container and the standing up length Y (m) from the container to the tow trimming guide is set to satisfy the following equation; 0.1
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公开(公告)号：JPH10266024A
公开(公告)日：1998-10-06
申请号：JP9015097
申请日：1997-03-24
Applicant: TORAY INDUSTRIES
Inventor： MORIKAWA HARUKI , ENDO MAKOTO , TAKECHI MIKIYA
IPC: D01F9/22
Abstract: PROBLEM TO BE SOLVED: To obtain a carbon fiber without causing yarn breakage due to unevenness of yarn thickness, ignition, etc., by subjecting a polyacrylonitrile-based precursor fiber bundle having thick fineness to flameproof treatment under specific conditions by passing the fiber bundle through a flameproof furnace in zigzags. SOLUTION: The cross section form of a polyacrylonitrile-based precursor fiber bundle having >=30,000 total denier is kept in a rectangle having 10-50 average flatness ratio defined by a ratio of yarn width to yarn thickness. Apparent average fineness per mm width of fiber bundle is preferably kept to 3,000 to 10,000 denier and the fiber bundle is passed through a flameproof furnace in zigzags and subjected to flameproof treatment at 200-300 deg.C. Then, the treated fiber bundle is subjected to carbonization treatment at 500-1,500 deg.C to provide the objective carbon fiber.
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公开(公告)号：JPH10237723A
公开(公告)日：1998-09-08
申请号：JP35608597
申请日：1997-12-09
Applicant: TORAY INDUSTRIES
Inventor： KAWAMURA TOSHINORI , YAMAMOTO EIICHI , ENDO MAKOTO , NAKAMA RYOICHI , YAMAZAKI JUN
Abstract: PROBLEM TO BE SOLVED: To provide a heat treatment furnace, which efficiently heat-treats carbon fibers in a short time, controls occurrence of troubles and deterioration of product qualities, effects heat treatment stably at low cost, improves produc tivity of the carbon fibers, and reduces the production cost. SOLUTION: This heat treatment furnace is provided with two or more heat treatment cambers 13a, 13b and 13c in the same unit, which can be set at temperature levels different from one another. It is also provided with a blow-off port 17 through which hot air is blown into the furnace to heat the heat treatment chambers 13a, 13b and 13c in the direction of passages along which objects 12 to be treated are moved to pass through the chambers 13a, 13b and 13c, wherein there is a relationship of Ss/Sf
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公开(公告)号：JP2006225769A
公开(公告)日：2006-08-31
申请号：JP2005037281
申请日：2005-02-15
Applicant: TORAY INDUSTRIES
Inventor： NAKAYAMA ISAO , ENDO MAKOTO , ISE MASASHI
IPC: D01F9/22
Abstract: PROBLEM TO BE SOLVED: To obtain a high-performance flameproof fiber having low contents of specific elements and a carbon fiber and to provide methods for producing them. SOLUTION: The flameproof fiber has 1,000 ppm Si content in the fiber and 3 Si content and 3 Ca content. COPYRIGHT: (C)2006,JPO&NCIPI
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