公开(公告)号：JPS63159526A

公开(公告)日：1988-07-02

申请号：JP30637486

申请日：1986-12-24

Applicant: TORAY INDUSTRIES

Inventor： SHIROMOTO SHIGETAKE ,  KASHIWAGI YASUHIRO ,  MATSUBARA NOBUYUKI

IPC: D01F6/18 ,  D01F9/22

Abstract: PURPOSE:To suppress orientation relaxing in flameproofing and obtain the titled precursor, having a specific strength, maximum draw ratio and maximum developing tension, by finally drawing fibers consisting of acrylonitrile, etc., heat-setting the drawn fibers and relaxing the fibers in, before and after the above-mentioned treatment. CONSTITUTION:A polymer, having at least 5.5g/d strength and containing >=90wt% acrylonitrile is spun, drawn and finally drawn to give a precursor, which is then subjected to heat-setting treatment at the maximum temperature of 150-220 deg.C and relaxed in, before and after the heat-setting treatment within the range of 3-10% to afford the aimed precursor, having 5.5-7g/d strength, 115-140% maximum draw ratio during residence in hot air at 240 deg.C for 2min and 0.3-0.4g/d maximum developing tension when treated in hot air at 240 deg.C for 2min and useful for carbon fibers.

公开(公告)号：JPH0929741A

公开(公告)日：1997-02-04

申请号：JP17992295

申请日：1995-07-17

Applicant: TORAY INDUSTRIES

Inventor： KASHIWAGI YASUHIRO ,  YOSHIZAWA MASANORI ,  YAMASHITA MASAKI

IPC: B29B11/16 ,  B29K105/06 ,  B32B7/06 ,  B32B27/04 ,  C08J5/24

Abstract: PROBLEM TO BE SOLVED: To manufacture a rolled prepreg material having high quality level by preventing the mixture of foreign matter with the prepreg. SOLUTION: In the steps of manufacturing a rolled prepreg material, a wiping material is brought into contact with the surface of a sheet-like carrier not to be laminated to the prepreg to wipe to clean a foreign matter when the material laminated with the carrier on the prepreg is wound, and the sticking of the matter to the prepreg in the case of winding is prevented.

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：JP2000026026A

公开(公告)日：2000-01-25

申请号：JP19842798

申请日：1998-07-14

Applicant: TORAY INDUSTRIES

Inventor： KASHIWAGI YASUHIRO ,  ENDO MAKOTO ,  TAKECHI MIKIYA

IPC: B65H69/02 ,  D01F9/22 ,  D02G3/02 ,  D02J1/00

Abstract: PROBLEM TO BE SOLVED: To improve the passing property in a higher level without using any binder by laminating fiber bundles whose ductility is not more than a specified value on each other so that the flatness is within a specified range, and connecting them through the slip in the rapid fluid treatment to reduce the breakage or scatter of the fiber. SOLUTION: A fiber bundle is a low ductility fiber bundle whose ductility is not more than 3%, includes a glass fiber bundle, an Aramid fiber bundle and a carbon fiber bundle, and is characterized as being high in strength, high in elasticity and brittle. In connecting the bundle, fiber bundles 4 are arranged approximately parallel to each other in order to laminate the fiber bundles 4 on each other, and the fiber bundles 4 are pulled and arranged in a flat shape without any stranding. The flatness of a laminated part is within a range of 10-500, preferably 25-250. The rapid fluid treatment is preferably effected by using air, a nozzle 1 is provided with a rectangular or elliptical area, and a circular ejection hole 2 is preferable. This method is preferably used in connecting fiber bundles to each other when switching a raw fiber bundle.