公开(公告)号：JP2004256960A

公开(公告)日：2004-09-16

申请号：JP2003050492

申请日：2003-02-27

Applicant: TORAY INDUSTRIES

Inventor： ENDO MAKOTO

IPC: D01F9/32

Abstract: PROBLEM TO BE SOLVED: To provide a flameproofing furnace capable of more uniformly carrying out flameproofing treatment in a shorter time even if a precursor fiber is thick and reducing production cost of a flame-resistant fiber, particularly, a carbon fiber. SOLUTION: The flameproofing furnace has a heat-treating chamber through which the precursor fiber of the carbon fiber is passed and a far-infrared heater for heating the precursor fiber installed in the heat-treating chamber. COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2000336529A

公开(公告)日：2000-12-05

申请号：JP14945599

申请日：1999-05-28

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO TAKASHI ,  ENDO MAKOTO

IPC: D01F9/22

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing carbon fiber having high quality and excellent in higher-order processability at a low cost from tow based fiber having >=30,000 denier number. SOLUTION: This method for producing carbon fiber comprises subjecting an acrylonitrile-based fiber bundle having >=30,000 total denier number to flameproofing treatment in oxidizing atmosphere at 200-250 deg.C and carbonizing the treated fiber bundle. The producing method feathers carrying out heat treatment of flameproofed fiber bundle having 1.30-1.40 specific gravity and obtained by subjecting the fiber bundle to flameproofing treatment in an inert atmosphere in a temperature area of 300-500 deg.C at a heating rate of 50-250 deg.C/min for 0.8-4 min while keeping denier number per 1 mm width to >=5,000 and further 3 carrying out heat treatment under inert atmosphere at 800-1,000 deg.C.

公开(公告)号：JPH10167564A

公开(公告)日：1998-06-23

申请号：JP34062296

申请日：1996-12-05

Applicant: TORAY INDUSTRIES

Inventor： ENDO MAKOTO ,  MORIKAWA HARUKI ,  YAMAMOTO EIICHI

IPC: B65H54/00 ,  B65H54/04 ,  B65H55/04

Abstract: PROBLEM TO BE SOLVED: To wind up carbon fiber of large fineness under the condition in which troubles and inconvenience are not generated for the use by setting the outer diameter of the package of a cheese winding wound up with carbon fiber, the bobbin diameter, and the winding width in the range of specific formulas. SOLUTION: Carbon fiber is wound up in a form of cheese winding package or inside pull package, as a fiber bundle of carbon fiber for textile over fineness of 25,000 denier, favorably over 30,000 denier. The size of the carbon fiber package of cheese winding satisfies the formulas (I-III). Namely it is prescribed in the following range. The formula I : (d)>50, favorably the formula II : 20

公开(公告)号：JP2002105766A

公开(公告)日：2002-04-10

申请号：JP2000298996

申请日：2000-09-29

Applicant: TORAY INDUSTRIES

Inventor： HONDA TAKASHI ,  ONISHI TETSUSHI ,  ENDO MAKOTO

IPC: C08J7/00 ,  D01F9/22

Abstract: PROBLEM TO BE SOLVED: To provide a method for stably producing carbon fibers in excellent productivity, while preventing the breakage of the fibers due to the storage of heat. SOLUTION: This method for allowing the substantially non-twisted polyacrylonitrile-based carbon fiber precursors totally comprising >=10,000 filaments to resist to flame, characterized by using a heat-treating oven which has openings for charging and discharging the fibers to be treated in a heat- treating chamber and in which plural nozzles for blowing out a hot gas along a fiber-passing route and plural nozzles for sucking the hot gas are disposed on both the sides of the fiber-passing route, and blowing the hot gas between the suction openings of the hot gas-sucking nozzles and the fiber to be treated.

公开(公告)号：JPH11269726A

公开(公告)日：1999-10-05

申请号：JP7029798

申请日：1998-03-19

Applicant: TORAY INDUSTRIES

Inventor： ENDO MAKOTO ,  KASHIWAGI YASUHIRO ,  OKAMOTO TAKASHI

IPC: D01F9/22

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing carbon fibers by subjecting a precursor fiber bundle having a large total fineness to a flame-resistant treatment, capable of inhibiting the winding of the fiber bundle on a roll and the breakage of the fiber bundle, stably passing the fiber bundle through a process and improving the productivity. SOLUTION: This method for producing carbon fibers comprises turning back a polyacrylonitrile precursor fiber bundle having a total fineness of >=30,000 denier with a guide roll in a substantially non-twisted state in a 200-300 deg.C flame resistant treatment oven, simultaneously subjecting the fiber bundle to a flame resistant treatment, and subsequently carbonizing the treated fiber bundle. Therein, the R/F ratio of the diameter R (mm) of the guide roll to the filament number F of the precursor fiber bundle is 1×10 to 8×10 . The guide roll is disposed on the outside of the flame-resistant treatment oven, and the fiber bundle just before brought into contact with the guide roll is cooled at a temperature of

公开(公告)号：JPH10316311A

公开(公告)日：1998-12-02

申请号：JP14590397

申请日：1997-05-19

Applicant: TORAY INDUSTRIES

Inventor： ENDO MAKOTO ,  MORIKAWA HARUKI ,  MIZUKAMI SEIJI

IPC: B65H55/04

Abstract: PROBLEM TO BE SOLVED: To wind up a carbon fiber thread with high fineness into an optimum shape package which is provided with high winding density and hardly collapses. SOLUTION: In the subject package, a carbon fiber yarn with a fineness of 25,000 denier or more is wound on a bobbin so as to be wound into a square- end type package with a yarn width per fineness of 0.15×10 -0.35×10 mm/ denier, and twill angles in the beginning of winding and in the end of winding range 10-30 deg., 3-15 deg. individually, while the number W0 of ends at a wind rate W ranges 0.12-0.88. The wound yarn is shifted by 10-70% of yarn mean width to the yarn wound on the inner layer every 1-9 traverses.

公开(公告)号：JPH10251922A

公开(公告)日：1998-09-22

申请号：JP4924797

申请日：1997-03-04

Applicant: TORAY INDUSTRIES

Inventor： SUEHIRO TAKEO ,  OZAKI KEIICHIRO ,  ENDO MAKOTO

IPC: D01F9/22

Abstract: PROBLEM TO BE SOLVED: To provide a production process of a carbon fiber or a graphite fiber inhibiting the growth of silicone carbide and fluff of a filament in carbonization process capable of enhancing the productivity. SOLUTION: In the production process in which a precursor fiber is processed at 300-1000 deg.C in an inert atmosphere, then processed at 1000-2000 deg.C in an inert atmosphere, the carbonization process is carried out in the inert gas flow of the flow rate of 1-20m/min in the carbonization furnace.

公开(公告)号：JPH10226918A

公开(公告)日：1998-08-25

申请号：JP4725597

申请日：1997-02-14

Applicant: TORAY INDUSTRIES

Inventor： YOSHIMURA KOSUKE ,  SEKIDO SHUNEI ,  ENDO MAKOTO

IPC: D01F6/18 ,  B65H69/06 ,  D01F9/12 ,  D01F9/22

Abstract: PROBLEM TO BE SOLVED: To obtain a raw fiber for producing a carbon fiber free from the breaking of a connecting part or burning out in a flame resistance-imparting process by connecting both the terminal parts of bundles of precursor fibers having a large number of filaments to each other through a connecting medium which is non-exothermic at a flame resistance-imparting temperature and through entanglement at a single filament level. SOLUTION: The objective raw fiber for producing a carbon fiber is obtained by connecting both the terminal parts of a bundle of precursor fibers having the filament number of >=30,000 to each other through a connecting medium (e.g. a flame resistant fiber) which is non-exothermic at a flame resistance- imparting temperature [a calorific value determined by a DSC method (a differential scanning calorimetry) at the flame resistance-imparting temperature is

公开(公告)号：JPH10195718A

公开(公告)日：1998-07-28

申请号：JP35667196

申请日：1996-12-27

Applicant: TORAY INDUSTRIES

Inventor： ENDO MAKOTO ,  MORIKAWA HARUKI ,  YAMAZAKI JUN

IPC: D01F9/22 ,  D01D5/12

Abstract: PROBLEM TO BE SOLVED: To obtain a carbon yarn capable of being condensed into a yarn bundle of high denier, securing excellent resin impregnation properties, providing an improved FRP, by making the bundle of a polyacrylonitrile-based yarn fire- resistance in an oxidizing atmosphere and carbonizing in an inert atmosphere at a high temperature. SOLUTION: A yarn obtained by spinning an acrylonitrile-based polymer from a spinneret having >=10mm diameter (a), a fiber width (b) of a yarn on a guide and a distance (c) between the spinneret and the guide in correlation of the equation 0.02>=tanθ=(a-b)/2c>=0.006 to give a yarn, which is condensed to give a handle of a polyacrylonitrile-based yarn having 10-40 (1/m) fiber interlaced value CF value by fook drop method, which is made fire-resistance in an oxidizing atmosphere at 200-300 deg.C. Then, the yarn is carbonized in an inert atmosphere at 500-1,500 deg.C to give the objective carbon yarn having >=25,000 denier and 10-100 (1/m) fiber interlacement value CF value.

公开(公告)号：JPH0827619A

公开(公告)日：1996-01-30

申请号：JP11089195

申请日：1995-05-09

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MAKOTO ,  ENDO MAKOTO ,  ONO KEIZO

IPC: D01F6/18 ,  D01F9/22 ,  D01F11/16

Abstract: PURPOSE:To provide an acrylic precursor capable of mass-producing carbon fibers inn a short time without decreasing carbonization yield, consisting of a specific polyacrylonitrile copolymer containing a polymerizable unsaturated carboxylic acid. CONSTITUTION:This precursor consists of a polyacrylonitrile copolymer containing 0.1-10 (pref. 0.5-3)wt.% of a polymerizable unsaturated carboxylic acid (e.g. acrylic acid, methacrylic acid). In this precursor, the radical quantity after heated at 240 deg.C for 1h should be >=2X10 spins/g. When this precursor is subjected to carbonization-proofing treatment in carbonization-resistant ovens 1, 2, irradiation of this precursor with electron beams in an oxygen-contg. atmosphere with electron-beam irradiators 3, 4 etc., yields the other objective carbon fibers with improved elastic modulus.