Carbon fiber bundle and production method therefor
US11834758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2019 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Feb 17, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A carbon fiber bundle that satisfies retaining a twist count of 2 turns/m or more when suspended with one end fixed and the other end free; having a single fiber diameter of 6.1 μm or more and a heat loss rate at 450° C. of 0.15% or less, and formula (1) wherein Lc is crystallite size and π002 is an orientation parameter of crystallites determined from bulk measurement of the entire fiber bundle: π002>4.0×Lc+73.2 (1); and a carbon fiber bundle that satisfies: retaining a surface layer twist angle of 0.2° or more when suspended with one end fixed and the other end free; having a single fiber diameter of 6.1 μm or more and a heat loss rate at 450° C. of 0.15% or less, and formula (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.