Small diameter pitch-based carbon fiber bundle and production method thereof
US5425931A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 7, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Sep 7, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/322
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A bundle of pitch-based carbon fibers which is composed of 1000 to 100,000 continuous fiber filaments having an average diameter of 4 to 8 .mu.m, a filament tensile strength of at least 3.0 GPa, and a modulus of at least 600 GPa, and also a method for producing a fine diameter pitch-based carbon fiber wherein use is made of a spinning nozzle with a single nozzle plate which has at least 1000 capillary holes, has the capillaries arranged concentrically and circularly in 3 to 20 rows, has the capillaries positioned to be divided into at least two blocks, has a columnar projection protruding at least 20 mm from the surface of the nozzle plate at the center of the nozzle plate, and has capillaries of a diameter of 50 to 110 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.