公开(公告)号：US4818612A

公开(公告)日：1989-04-04

申请号：US39679

申请日：1987-04-20

Applicant: Ryuichi Hara ,  Masami Kagizaki ,  Tsuyoshi Takakura ,  Shigeki Tomono

Inventor： Ryuichi Hara ,  Masami Kagizaki ,  Tsuyoshi Takakura ,  Shigeki Tomono

IPC: D01D4/00 ,  D01F9/00 ,  D01F9/145 ,  D01F9/32 ,  D02G3/00

CPC classification number: D01F9/00 ,  D01D4/00 ,  D01F9/145 ,  D01F9/322 ,  Y10T428/2918 ,  Y10T428/2973

Abstract: A carbon fiber having a cross-sectional crystal structure of substantially uniform mesh form orientation as observed by a polarizing microscope.

Abstract translation: 具有通过偏光显微镜观察到的具有基本上均匀的网格形状取向的横截面晶体结构的碳纤维。

公开(公告)号：US4923648A

公开(公告)日：1990-05-08

申请号：US245564

申请日：1988-09-19

Applicant: Ryuichi Hara ,  Masami Kagizaki ,  Tsuyoshi Takakura ,  Shigeki Tomono

Inventor： Ryuichi Hara ,  Masami Kagizaki ,  Tsuyoshi Takakura ,  Shigeki Tomono

IPC: D01D4/00 ,  D01F9/00 ,  D01F9/145 ,  D01F9/32

CPC classification number: D01F9/00 ,  D01D4/00 ,  D01F9/145 ,  D01F9/322 ,  Y10T428/2918 ,  Y10T428/2973

Abstract: A carbon fiber having a cross-sectional structure of regular mesh form orientation as observed by a polarizing microscope is produced by a method comprising melt spinning pitch material through spinning nozzles, followed by infusible treatment and carbonization, wherein a mesh filter layer is provided at an upstream portion of each nozzle, and the pitch material is passed first through the mesh filter layer and then through the nozzle for spinning.