Carbon fiber bundle and stabilized fiber bundle
US11105022B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2014 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Mar 5, 2037 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A carbon fiber bundle includes single-fibers 40% or more of which have a quasi-oval cross section perpendicular to a fiber direction and meet both Equations (1) and (2): 1.03≤La/Lb≤1.20 (1) and 1.05≤Ld/Lc≤1.25 (2), wherein La is length of a long axis defined as a line segment connecting two points farthest away from each other on a circumference of the quasi-oval cross section of a single-fiber; Lb is length of a short axis defined as a line segment extending perpendicular to the long axis, passing through a midpoint of the long axis, and connecting two points on the circumference; and Lc and Ld are defined as length of a shorter one and that of a longer one, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.