公开(公告)号：JPH09268436A

公开(公告)日：1997-10-14

申请号：JP7462896

申请日：1996-03-28

Applicant: TORAY INDUSTRIES

Inventor： TAKEDA SHIGERU ,  WASHIYAMA MASAYOSHI ,  TAKEUCHI IKUO

IPC: D01F9/12

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing carbon fibers, capable of preventing the mixing adjacent precursor fibers due to the decrease in the distance among of the precursor fiber strands on a grooved roller for simultane ously sintering the precursor fibers and thereby capable of improving the process ability of the precursor fibers by blowing a gas toward the outside of the grooved roller for the precursor fibers on the feeding side of the grooved roller. SOLUTION: This method for producing carbon fibers contains guiding a plurality of precursor fiber 4 into the grooves of a grooved roller 3. Therein, just before the fibers 4 reach the roller 3, a gas 1 is blown from a pipe 2 for blowing the gas to the outside of the roller 3 in order to prevent the mutual interference of the adjacent fibers. The gas is preferably blown at a velocity of >=0.5m/sec and at a blowing angle of >=10 degree to the fibers. The tensions of the fibers at the gas-blowing positions are preferably 0.05-0.3g/d, and the gas is preferably blown on the fibers just in front of the fiber-guiding positions on the grooved roller.

公开(公告)号：JPH04240221A

公开(公告)日：1992-08-27

申请号：JP626591

申请日：1991-01-23

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  YAMANE SHOJI

IPC: D01F9/22

Abstract: PURPOSE:To obtain the title fiber having specific values in degree of orientation of crystal, crystal size, tensile modulus and composite compression strength, useful for space and airplane uses, sport use, etc., and being excellent in tensile modulus and composite compression strength. CONSTITUTION:A polyacrylonitrile (PAN)-based polymer (e.g. acrylonitrile copolymer, preferably having =2.0 intrinsic viscosity (n) by solution polymerization, etc., and used as a precursor is spun, preferably by wet spinning method, and the resultant fiber having =2.0g/d high tension in the above-mentioned graphitization to provide the objective fiber having 95-99% degree pi002 of crystal orientation, 60-80Angstrom crystal size Ldc, >=680GPa tensile modulus and >=600MPa composite compression strength.

公开(公告)号：JPH0274621A

公开(公告)日：1990-03-14

申请号：JP22519088

申请日：1988-09-08

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D01F6/38 ,  D01F9/22

Abstract: PURPOSE:To provide the subject fiber having specified density and tensile elastic modulus, having extremely high specific elastic modulus owing to low density and high elastic modulus and suitable for aerospace used and fishing rod. CONSTITUTION:The objective fiber has a density of and a tensile elastic modulus of >=45t/mm . The fiber can be produced e.g., by spinning an acrylic polymer by wet and dry spinning process, drawing the obtained coagulated fiber in hot water, subjecting the resultant precursor to flame-resistant treatment in an oxidizing atmosphere at 240-300 deg.C until the density reaches >=1.35g/cm and calcining the flame-resistant fiber in an inert atmosphere at the maximum temperature of 2300-2900 deg.C.

公开(公告)号：JPH0247311A

公开(公告)日：1990-02-16

申请号：JP19424288

申请日：1988-08-03

Applicant: TORAY INDUSTRIES

Inventor： WASHIYAMA MASAYOSHI ,  MATSUHISA YOJI ,  HIRAMATSU TORU

IPC: D01F6/18 ,  D01F6/54 ,  D01F9/22

Abstract: PURPOSE:To obtain carbon fiber having excellent strength and modulus of elasticity at low cost by blending an acrylic polymer with a specific amount of pitch and then making into fiber. CONSTITUTION:An acrylic polymer is blended with 0.1-20wt.%, preferably 2-5wt.% pitch (preferably pitch replaced with substituent group such as halogen, amino group or carbonyl group or containing bond such as -Co-, -NH-, -O-, etc., having 80-200 deg.C softening point and hardly containing component having

公开(公告)号：JPH01321913A

公开(公告)日：1989-12-27

申请号：JP15258788

申请日：1988-06-21

Applicant: TORAY INDUSTRIES

Inventor： HIRAMATSU TORU ,  MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI

IPC: D01F6/18 ,  D01F6/38 ,  D01F9/22

Abstract: PURPOSE:To provide the subject fiber made of a polymer composed of alpha- chloroacrylonitrile unit and effective in extremely lowering the temperature of the flame-resisting treatment process, thereby enabling the remarkable saving of energy and the prevention of the lowering of the carbon fiber quality. CONSTITUTION:The objective fiber is produced by using a polymer containing >=60%, preferably >=85mol% of alpha-chloroacrylonitrile unit. Preferably, the single fiber diameter of the precursor fiber is =90% in the direction of fiber axis from the viewpoint of the physical properties of carbon fiber produced by the calcination of the precursor fiber. The flame-resisting treatment of the precursor fiber can be performed at 100-180 deg.C and the thermal carbonization treatment is preferably carried out at >=1,300 deg.C.

公开(公告)号：JPH07310240A

公开(公告)日：1995-11-28

申请号：JP9988694

申请日：1994-05-13

Applicant: TORAY INDUSTRIES

Inventor： WASHIYAMA MASAYOSHI ,  TAKEUCHI IKUO ,  TAMAI HIDEO

IPC: D06M15/55 ,  D01F9/22 ,  D01F11/14 ,  D06M101/00 ,  D06M101/12 ,  D06M101/40

Abstract: PURPOSE:To obtain carbon fiber capable of significantly improving the characteristics of the composite materials by reinforcing them therewith through suppressing breakage or fluffing during the filament winding molding process using the carbon fiber. CONSTITUTION:Acrylic precursor filament yarns in strand tensile strength, >=0.2g/de in yarn breakage limiting tension and >=100kgf/mm2 in loop strength. When such carbon fiber is impregnated with an epoxy resin and wound up on a metallic mandrel breakage or fluffing can be suppressed significantly and line speed up is enabled.

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：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：JPH10237756A

公开(公告)日：1998-09-08

申请号：JP3930297

申请日：1997-02-24

Applicant: TORAY INDUSTRIES

Inventor： WASHIYAMA MASAYOSHI ,  HIRATA TOSHIAKI ,  NOJIRI HIRONOBU

IPC: D06B15/00 ,  D01D10/00 ,  F26B9/06 ,  F26B13/10

Abstract: PROBLEM TO BE SOLVED: To provide both a yarn dryer continuously operable for a long period and advantageous to running cost in a drying step for a yarn and a method for drying. SOLUTION: This yarn dryer is equipped with a hot air feed port for feeding hot air and a hot air discharge port for discharging the hot air in a box-shaped dryer having at least two openings for passing a yarn therethrough. The method for drying the yarn comprises continuously feeding the yarn and drying the yarn while feeding the fresh hot air from the hot air feed port and discharging the hot air from the hot air discharge port by using the yarn dryer.