公开(公告)号：JPH04272231A

公开(公告)日：1992-09-29

申请号：JP3045491

申请日：1991-02-25

Applicant: TORAY INDUSTRIES

Inventor： WASHIYAMA MASAYOSHI ,  MATSUHISA YOJI ,  AKIMOTO TATSUO

IPC: D01F9/14 ,  D01F9/22 ,  D02G3/16

Abstract: PURPOSE:To obtain a graphitized fiber having high crystallinity of graphite and excellent elastic modulus and strength by producing a carbon fiber by baking at a temperature below a specific level and baking the obtained fiber in a pressurized inert atmosphere at a temperature above a specific level under drawing and twisting. CONSTITUTION:A carbon fiber such as an acrylic carbon fiber produced by baking at =2000 deg.C under twisting while applying elongation of >=5%. The crystallinity of graphite can easily be improved by this process to obtain the objective fiber having excellent elastic modulus, etc. The twist number of the carbon fiber is preferably 2-30turn/m.

公开(公告)号：JPH0376869A

公开(公告)日：1991-04-02

申请号：JP21215289

申请日：1989-08-17

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D06M11/00 ,  D01F11/10 ,  D06M11/34 ,  D06M11/64 ,  D06M101/00 ,  D06M101/40

Abstract: PURPOSE:To remarkably improve tensile strength of carbon fiber by treating the surface of the aforementioned fiber in the vapor phase in an atmosphere, composed of nitrogen dioxide and an inert gas in a specific proportion with an oxygen content within a specific range and kept at a high temperature. CONSTITUTION:For example, the surface of carbon fiber composed of an acrylic fiber, etc., is treated in the vapor phase in an atmosphere, composed of 5-60vol.%, preferably 10-30vol.% nitrogen dioxide and 40-95vol.% inert gas (preferred example; nitrogen) in an oxygen concentration within the range of =600kg/mm tensile strength. The high strength carbon fiber is suitable for aerospace uses.

公开(公告)号：JPH0376822A

公开(公告)日：1991-04-02

申请号：JP6148890

申请日：1990-03-13

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D01F6/18 ,  D01F6/38 ,  D01F9/22

Abstract: PURPOSE:To obtain at low cost in high productivity a high-strength. heat- resistant fiber with excellent mechanical properties by providing an acrylic precursor with flame resistance under a pressurized state. CONSTITUTION:The objective fiber can be obtained by providing an acrylic precursor with flame resistance at 200-300 deg.C under a pressurized state (pref. at a pressure of 0.5-50kg/cm -G).

公开(公告)号：JPH02300325A

公开(公告)日：1990-12-12

申请号：JP11660489

申请日：1989-05-09

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D01F9/14 ,  D01F9/22

Abstract: PURPOSE:To obtain flameproof fiber having high mechanical characteristics with hardly any bonding between mutual single fibers in excellent productivity by flameproofing or infusibilizing a precursor of the flameproof fiber under ordinary or reduced pressure in the initial period and then flameproofing or infusibilizing the resultant fiber under pressure in the latter period. CONSTITUTION:A precursor of flameproof fiber (preferably having in the initial flameproofing) and then flameproofed or infusibilized under pressure in the latter period to afford the objective fiber.

公开(公告)号：JPH02300324A

公开(公告)日：1990-12-12

申请号：JP11660389

申请日：1989-05-09

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D01F9/14 ,  D01F9/22

Abstract: PURPOSE:To obtain flameproof fiber with hardly any bonding between mutual single fibers by flameproofing of infusibilizing a precursor of the flameproof fiber under reduced pressure. CONSTITUTION:A precursor of flameproof fiber (preferably having =1.35g/cm as an advancing degree of flameproofing.

公开(公告)号：JPH01298217A

公开(公告)日：1989-12-01

申请号：JP13083488

申请日：1988-05-27

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: D01F6/18 ,  D01F6/38 ,  D01F9/22

Abstract: PURPOSE:To prevent surface defects resulting from bonding between single filaments at an early stage of carbonization and to obtain reinforcing carbon fiber having a few inner voids, high strength and high modules of elasticity by subjecting acrylic yarn to flameproofing treatment and carbonizing the fiber at specific temperature under reduced pressure while drawing. CONSTITUTION:Acrylic fiber is heated in an oxidizing atmosphere to carry out flameproofing treatment and then carbonized at 300-1,000 deg.C preferably 300-550 deg.C under =3%, preferably >=10% to give the aimed fiber.

公开(公告)号：JPH01298215A

公开(公告)日：1989-12-01

申请号：JP12762888

申请日：1988-05-25

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

IPC: C01B31/04 ,  D01F9/12

Abstract: PURPOSE:To raise productivity and to obtain the title fibers in high yield by providing a base material as a cathode with electric charge in an aqueous solution containing metallic ion, supplying the base material with a metallic catalyst and thermally decomposing a hydrocarbon gas by using the base material. CONSTITUTION:A base material such as graphite board or carbon fiber as a cathode is provided with electric charge in an aqueous solution containing ion of metal such as iron or nickel and the base material is supplied with a metallic catalyst. Then the base material is used and a hydrocarbon gas such as methane, benzene or ethane is thermally decomposed by using a hydrogen gas as a carrier gas at 700-1,500 deg.C to give the aimed fibers.