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：JPH10130963A

公开(公告)日：1998-05-19

申请号：JP23573297

申请日：1997-09-01

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MAKOTO ,  MATSUHISA YOJI

IPC: D01F6/18 ,  D01F6/40 ,  D01F6/54 ,  D01F9/22

Abstract: PROBLEM TO BE SOLVED: To obtain a carbon fiber having a high tensile strength, a precursor capable of obtaining such carbon fiber in a good productivity and effectively, and methods suitable for obtaining the above carbon fiber and the above precursor. SOLUTION: This carbon fiber shows a difference in elasticities K in an outer and in an inner layers, defined by the formula: K=(YM0 -YM1 )/D2 , which satisfies the following equation, K (YM) +7.136×10 YM-1.1 [wherein, YM (GPa) is mean elasicity of a whole monofilament; YM0 (GPa) is an elasticity in an outermost surface layer; YM1 (GPa) is an elasticity in a center; and D (μm) is mean monofilament diameter].

公开(公告)号：JPH08113876A

公开(公告)日：1996-05-07

申请号：JP25357194

申请日：1994-10-19

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MASANOBU ,  MATSUHISA YOJI ,  SHIMIZU KAZUHARU

IPC: D06M15/55 ,  D01F9/12 ,  D01F9/22 ,  D06M13/02 ,  D06M13/11 ,  D06M101/00 ,  D06M101/40

Abstract: PURPOSE: To provide a carbon fiber treated with a sizing agent, having uniform adhesion to a matrix resin and capable of getting a high and stable adhesion to the matrix resin. CONSTITUTION: An essentially non-twist carbon fiber is brought into contact with a vibrating curved member having a convex face at the side of the carbon fiber in a plane crossing the moving direction of the carbon fiber. A sizing agent is applied to the carbon fiber after laterally expanding the carbon fiber along the curved face of the curved member by the above contacting treatment. The obtained carbon fiber has the maximum and minimum thicknesses of the sizing agent falling in the range of 20-200Å and the ratio of the maximum thickness to the minimum thickness of 1-2, preferably 1-1.8. The sizing agent is preferably an aliphatic compound having plural epoxy groups such as glycerol polyglycidyl ether, diglycerol polyglycidyl ether and polyethylene glycol diglycidyl ether.

公开(公告)号：JPH0515825B2

公开(公告)日：1993-03-02

申请号：JP10315488

申请日：1988-04-26

Applicant: TORAY INDUSTRIES

Inventor： KUBOTA YOSHINOBU ,  MATSUHISA YOJI ,  HIRAMATSU TOORU

IPC: D06M10/00 ,  D01F9/14 ,  D01F9/22 ,  D06M11/00 ,  D06M11/05 ,  D06M101/00 ,  D06M101/40

公开(公告)号：JPH03249215A

公开(公告)日：1991-11-07

申请号：JP4875990

申请日：1990-02-27

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  ISHIDA TOMIHIRO ,  YAMANE SHOJI

IPC: D01F6/18 ,  D01D5/24 ,  D01D5/34 ,  D01F8/08 ,  D01F9/22

Abstract: PURPOSE:To obtain the subject fiber having fine denier, containing continuous hollow part, exhibiting improved bulkiness, water-absorption, etc., and useful as a precursor for carbon fiber by introducing a specific acrylic polymer as a core into a sheath polymer using a core-sheath spinneret. CONSTITUTION:The objective fiber is produced by introducing an acrylic polymer as a core part into a sheath polymer using a core-sheath spinneret. The intrinsic viscosity of the core polymer is >=1.5 times, preferably >=2.0 times that of the sheath polymer and the polymer concentration of the core polymer is

公开(公告)号：JPH03241014A

公开(公告)日：1991-10-28

申请号：JP3693990

申请日：1990-02-16

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D01F6/18 ,  D01F9/22

Abstract: PURPOSE:To provide the subject fiber having high carbon content, containing single hollow part in the core part, having low apparent specific gravity and high tensile strength and useful for aerospace material, fishing rod, etc. CONSTITUTION:The objective fiber contains a single hollow part at the core and has a carbon content of >=90%, an apparent specific gravity of =350kg/mm . The hollowness of the fiber is preferably 10-30%.

公开(公告)号：JPH03100026A

公开(公告)日：1991-04-25

申请号：JP23828489

申请日：1989-09-13

Applicant: TORAY INDUSTRIES

Inventor： HIRAMATSU TORU ,  TAKADA NORIAKI ,  MATSUHISA YOJI

IPC: C08J5/24

Abstract: PURPOSE:To prepare a fiber-reinforced composite resin material excellent in the compression strength, etc., by dispersing a finely powdered carbon fiber having a specified mean monofilament diameter, mean monofilament length, and mean aspect ratio in a resin, and impregnating a long, org. reinforcing fiber with the resin. CONSTITUTION:A finely powdered carbon fiber having a mean monofilament diameter of 2mum or lower, a mean monofilament length of 10mum or lower, and a mean aspect ratio of 2 or higher is dispersed in a resin (e.g. an epoxy resin), and a long, org. reinforcing fiber (e.g. a polyester fiber) is impregnated with the resin, giving a fiber-reinforced composite resin material. The resulting material is suitable for the use where both a high tensile strength and a high compression strength are required, such as for a structural material of an air plane.

公开(公告)号：JPH03816A

公开(公告)日：1991-01-07

申请号：JP13298689

申请日：1989-05-26

Applicant: TORAY INDUSTRIES

Inventor： WASHIYAMA MASAYOSHI ,  MATSUHISA YOJI ,  HIRAMATSU TORU

IPC: D06M11/00 ,  D01F9/14 ,  D01F9/15 ,  D01F11/16 ,  D06M10/06 ,  D06M101/00 ,  D06M101/40

Abstract: PURPOSE:To obtain the title high-performance fiber useful for a primary structural material of airplane, etc., having high compression strength by specific modulus in tension and compression strength of single fiber. CONSTITUTION:A pitch-based carbon fiber bundle is opened by an enlarging guide provided with mechanical vibration, preferably low-frequency vibration and made into a state wherein single fibers are dispersed so that bundle thickness in the direction of ion impregnation is =50KV under Torr vacuum and impregnated into the surface of the opened fiber bundle in at least two directions to give the aimed fiber having >=35t/mm (preferably 35-60t/mm ) modulus in tension and >=300kg/mm (preferably >=350kg/mm ) compression strength of single fiber.

公开(公告)号：JPH02251671A

公开(公告)日：1990-10-09

申请号：JP6715489

申请日：1989-03-17

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D06M11/00 ,  D01F9/22 ,  D01F11/16 ,  D06M10/06 ,  D06M101/00 ,  D06M101/40

Abstract: PURPOSE:To improve the compression strength and torsional modulus of a carbon fiber by using atoms or molecules which are solid or gas at normal temperature, ionizing and accelerating the atoms, etc., with electric field in vacuum, implanting ions having an atomic weight smaller than a specific level to the surface of a carbon fiber and then implanting ions having atomic weight larger than the above level. CONSTITUTION:Atoms or molecules which are solid or gas at normal temperature are ionized in vacuum and accelerated with electric potential. A carbon fiber is implanted from the surface with ions having an atomic weight of =21 such as silicon, argon, titanium or chromium. The vacuum degree in the implantation process is preferably eta10 Torr, especially Torr, the acceleration potential of ion is preferably >=50kV, especially >=150kV and the implantation amount of ion is preferably >=10 (ion)/ cm , especially >=10 /cm .

公开(公告)号：JPH02198826A

公开(公告)日：1990-08-07

申请号：JP1807489

申请日：1989-01-26

Applicant: TORAY INDUSTRIES

Inventor： HIRAMATSU TORU ,  TAKADA NORIAKI ,  MATSUHISA YOJI

IPC: B29C70/06 ,  B29B11/16 ,  B29C70/12 ,  C08J5/04

Abstract: PURPOSE:To obtain a carbon fiber-reinforced composite material with high compression strength by reinforcing with a long carbon fiber and a specified ultrafine powdery carbon fiber. CONSTITUTION:A carbon fiber-reinforced composite material is reinforced with a long carbon fiber and an ultrafine powdery carbon fiber with a mean monofilament diameter of 2mum or smaller, a mean fiber length of 10mum or smaller and a mean aspect ratio of 2 or larger. If the monofilament diameter is 2mum or larger and the monofilament length is 10mum or longer, when a long carbon fiber is impregnated with a matrix resin incorporated with the ultrafine powdery carbon fiber, the ultrafine fine powdery carbon fiber hardly penetrates between monofilaments of the long carbon fiber. In addition, if the aspect ratio is smaller than 2, a reinforcing effect of the resin with the ultrafine powdery carbon fiber and the improved width of elasticity of the resin becomes small. Amt. of loading of the ultrafine powdery carbon fiber to the matrix resin is usually pref. 3-20% in terms of vol. loading. If the amt. of loading is 3% or less, the effect becomes smaller and if it is 20% or more, the flowability of the resin becomes lower and they are not pref.