Carbon fiber composite material
US9193840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Feb 14, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J5/042
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A composite material includes: carbon fibers having an average fiber length of more than about 10 mm and about 100 mm or less; and a thermoplastic resin. The carbon fibers are substantially two-dimensionally-randomly oriented. The composite material includes a carbon fiber bundle (A) in a ratio of about 30 volume % or more and less than about 90 volume % to a total volume of the carbon fibers, the carbon fiber bundle (A) including the carbon fibers of a critical single fiber number defined by formula (1) or more. An average number (N) of the carbon fibers in the carbon fiber bundle (A) satisfies formula (2).Critical single fiber number=600/D (1)6×104/D2<N<2×105/D2 (2)D is an average fiber diameter (μm) of the carbon fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.