Patent · US Active

Carbon fiber composite material

US8829103B2 · kind B2 · utility

3Cited by

2References

10Claims

0Family size

Assignee

TEIJIN LIMITED · JP

Inventors

Yuhei Konagai · Auburn Hills, US
Yutaka Kondo · Tachikawa, JP
Naoaki Sonoda · Matsuyama, JP

Key dates

Filing date	Sep 14, 2012
Grant date	Sep 9, 2014
Priority date	—
Expiry date	Sep 14, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2927
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 more than 0 volume % and less than about 30 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)1.0×104/D2<N<2.5×104/D2 (2)

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.