公开(公告)号：JP2001131833A

公开(公告)日：2001-05-15

申请号：JP30229099

申请日：1999-10-25

Applicant: TORAY INDUSTRIES

Inventor： MURAI SHIYOUJI ,  MIZUHASHI MOTOI ,  TANAKA MASARU

IPC: D01F9/22

Abstract: PROBLEM TO BE SOLVED: To produce a carbon yarn which has a high level elastic modulus and a high level compression strength enabling the expression of a high compression strength in a obtained composite material, and to provide a method for stably producing the carbon yarn. SOLUTION: A method for producing carbon yarns, comprising subjecting an acrylic yarn having a single filament elongation variation rate of

公开(公告)号：JPH1112856A

公开(公告)日：1999-01-19

申请号：JP16611597

申请日：1997-06-23

Applicant: TORAY INDUSTRIES

Inventor： YAMAZAKI KATSUMI ,  TANAKA MASARU ,  MATSUHISA YOJI

IPC: D06M11/00 ,  D01F6/18 ,  D01F9/22 ,  D01F11/12 ,  D01F11/14 ,  D06M11/80 ,  D06M13/02 ,  D06M13/184 ,  D06M13/203 ,  D06M13/248 ,  D06M13/256 ,  D06M15/643 ,  D06M101/00 ,  D06M101/16 ,  D06M101/18 ,  D06M101/22 ,  D06M101/24 ,  D06M101/40

Abstract: PROBLEM TO BE SOLVED: To produce an acrylic precursor fiber for carbon fibers, having ultrahigh denseness and a high orientation degree and excellent in heat resistance without causing bonding among single fibers at the time of baking by carrying the wet spinning of a specific spinning solution, regulating the resultant fibers to a prescribed swelling degree and applying a silicone-based oil agent thereto. SOLUTION: The wet spinning of a spinning solution of an acrylic copolymer such as an acrylic copolymer composed of acrylonitrile and 0.3-5.0 mol.% vinyl compound having carboxyl group (e.g. acrylic acid) having 0.9-1.5 intrinsic viscosity [η] at 22-35 wt.% copolymer concentration is carried out to provide a swollen yarn having 30-100% swelling degree. A silicone-based oil agent and a boron compound such as boric acid in an amount of preferably 0.01-3.0 wt.% (based on the fibers) are then applied to the tersultant yarn to afford an acrylic precursor fiber for carbon fibers having >=1.170 specific gravity and 90-95% crystal orientation degree with wide angle X-rays.

公开(公告)号：JPH05171511A

公开(公告)日：1993-07-09

申请号：JP34338791

申请日：1991-12-25

Applicant: TORAY INDUSTRIES

Inventor： MATSUO TOSHIO ,  TANAKA MASARU ,  YAMAZAKI JUN ,  OKUDA AKIRA ,  SARUYAMA HIDEO

IPC: D01D5/06 ,  D01D5/096 ,  D01F6/18 ,  D01F9/22 ,  D02J1/22

Abstract: PURPOSE:To produce an acrylic yarn not causing the mutual adhesion of single filaments and useful for carbon fibers, etc., superior in productivity of its production facility by subjecting a specific yarn to a drawing treatment in a hot water bath and subsequently nipping the drawn yarn at a yarn temperature of =2000, the index M being represented by an equation: M=(the substantial total deniers [d] per yarn fed into the drawing in the bath)/(the width [mm] of the yarn per yarn), and has a single filament number of >=3000 per yarn.

公开(公告)号：JPH0284527A

公开(公告)日：1990-03-26

申请号：JP4343289

申请日：1989-02-23

Applicant: TORAY INDUSTRIES

Inventor： TANAKA MASARU ,  TAKADA NORIAKI ,  HIRAMATSU TORU

IPC: C08J5/06 ,  D01F11/16 ,  D06M10/00 ,  D06M10/06 ,  D06M101/00 ,  D06M101/40

Abstract: PURPOSE:To improve tensile strength of composite and adhesiveness of the fiber with matrix resin by strongly electrolyzing carbon fiber at anode in an electrolytic solution of acid or salt of said acid and inactivating the surface of said fiber, then dipping in an alkaline aqueous solution. CONSTITUTION:A carbon fiber (preferably obtained by heating acrylonitrile- based fiber in oxidative atmosphere and then heating at high-temperature in inert atmosphere) is strongly electrolyzed at anode in an electrolytic solution composed of acid and/or salt of said acid [preferably nitric acid (salt)] and the surface of said fiber is subjected to inactivating treatment (preferably heated at 650-850 deg.C in inert gas such as nitrogen), then dipped in alkaline aqueous solution (e.g., ammonia water) or preferably subjected to surface treatment of electrolysis at anode to afford a carbon fiber suitable for reinforcement, etc.

公开(公告)号：JP2002020975A

公开(公告)日：2002-01-23

申请号：JP2000207950

申请日：2000-07-10

Applicant: TORAY INDUSTRIES

Inventor： TOKUDA MASASHI ,  YAMAZAKI KATSUMI ,  TANAKA MASARU

IPC: D06M15/263 ,  D01F9/22 ,  D06M15/233

Abstract: PROBLEM TO BE SOLVED: To provide carbon fiber bundles of high performance that has good processability to prepregs and gives the composite material developing excellent strength properties, when it is combined with a resin. SOLUTION: The objective carbon fiber bundles having organic fine particles on their carbon fiber surfaces are produced by coating the fiber surfaces of the bundles with a surface-treating agent including organic fine particles wherein the surface area ratio of the single fibers constituting the fiber bundles is

公开(公告)号：JPH11124744A

公开(公告)日：1999-05-11

申请号：JP28722997

申请日：1997-10-20

Applicant: TORAY INDUSTRIES

Inventor： YAMAZAKI KATSUMI ,  TANAKA MASARU ,  MATSUHISA YOJI

IPC: D06M11/00 ,  D01F6/18 ,  D01F9/22 ,  D01F11/06 ,  D06M11/82 ,  D06M15/643 ,  D06M101/00 ,  D06M101/40

Abstract: PROBLEM TO BE SOLVED: To obtain carbon fiber precursor that contains extremely reduced voids remaining therein to steeply increase the strength of the carbon fiber by keeping the concentration ratio of silicon in the filament in a specific range to inhibit the finishing oil from soaking into the surface layer of the precursor fiber. SOLUTION: The concentration ratio R1 of silicon in the precursor filament is defined by formula I (Si 100 is the silicon count measured with SIMS at a depth of 100 nm; Si 800 is the silicon count at 800 nm depth) is 1-10, or the concentration ratio R2 of boron in the precursor filament is defined by formula II (B 50 is the boron count measured at the depth of 50 nm; B 800 is the boron count at the depth of 800 nm) is 50-1,000 and the brightness difference ΔL caused by iodine adsorption is 5-35. This precursor fiber is prepared by spinning a polymer comprising >=95 mol.% of acrylonitrile =70 deg.C to set the swelling degree to

公开(公告)号：JPH1112854A

公开(公告)日：1999-01-19

申请号：JP16289797

申请日：1997-06-19

Applicant: TORAY INDUSTRIES

Inventor： YAMAZAKI KATSUMI ,  TANAKA MASARU ,  MATSUHISA YOJI

IPC: D01F6/18 ,  D01F9/22

Abstract: PROBLEM TO BE SOLVED: To produce a precursor fiber for an acrylic carbon fibers, slight in voids and difference in structure between internal and external structures of single fibers and excellent in tensile characteristics by adding water to a solution composed of a specific acrylic polymer and an organic solvent and producing the fiber under specific conditions. SOLUTION: Water is added to a solution composed of an acrylic polymer containing >=90 wt.% acrylonitrile and an organic solvent such as DMSO to provide a spinning solution containing 10-50 wt.% water based on the polymer. The resultant solution is once extruded from spinneret holes into a gas atmosphere and then led into a coagulation bath at

公开(公告)号：JPS62149972A

公开(公告)日：1987-07-03

申请号：JP29041185

申请日：1985-12-25

Applicant: TORAY INDUSTRIES

Inventor： TANAKA MASARU ,  TAKADA NORIAKI ,  HIRAMATSU TORU

IPC: C08J5/06 ,  D06M10/00 ,  D06M101/00 ,  D06M101/40

公开(公告)号：JP2002105747A

公开(公告)日：2002-04-10

申请号：JP2000290126

申请日：2000-09-25

Applicant: TORAY INDUSTRIES

Inventor： TOKUDA MASASHI ,  YAMASAKI KATSUMI ,  TANAKA MASARU

IPC: D06M15/333 ,  D01F6/18 ,  D01F9/22 ,  D01F11/06

Abstract: PROBLEM TO BE SOLVED: To obtain an acrylic precursor fiber for providing a graphitized fiber capable of suppressing crystallinity in a surface layer part, good in adhesion to a matrix resin and having a high 0 deg. compression strength (bending strength as practical characteristics) and to provide a method for producing the acrylic precursor fiber. SOLUTION: This acrylic precursor fiber is characterized by comprising a water-soluble vinyl polymer in at least the surface of the acrylic precursor fiber. The method for producing the acrylic precursor fiber is characterized by applying the water-soluble vinyl polymer to a water-swollen fiber before drying and densifying and then drying and densifying the fiber when an acrylic copolymer is spun by a wet spinning or a dry jet-wet spinning to produce the acrylic precursor fiber.

公开(公告)号：JP2001131832A

公开(公告)日：2001-05-15

申请号：JP31089299

申请日：1999-11-01

Applicant: TORAY INDUSTRIES

Inventor： TOKUDA MASASHI ,  YAMAZAKI KATSUMI ,  TANAKA MASARU

IPC: D01F9/12

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a carbon yarn, which enables the inhibition in the mutual adhesion of single filaments and in the generation of fuzzes in a sintering process, the improvement in process passableness, and the supply in the high strength carbon yarn, by eliminating with guide bars the mutually adhered state of the single filaments caused by the advance of the gelation of a silicone oil in a flame-resisting process. SOLUTION: A method for producing carbon yarns, comprising heating a precursor fiber bundle in an oxidative atmosphere to subject the precursor fiber bundle to a flame-resisting treatment and then carbonizing the treated precursor fiber bundle, characterized in that in the flame-resisting treatment process, the precursor fiber bundle is allowed to pass through plural fixed guide bars to open and then guided into a flame-resisting oven.