Random mat, shaped product of fiber reinforced composite material, and carbon fiber mat

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United States of America Patent

PATENT NO 9909253
SERIAL NO

14439581

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Abstract

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There is provided a random mat including carbon fibers having an average fiber length of from 3 mm to 100 mm and a thermoplastic resin, wherein a fiber areal weight of the carbon fibers is from 25 to 10,000 g/m2, a proportion of carbon fiber bundles (A) constituted by single carbon filaments of a critical single fiber number or more defined by the formula (1) to the total amount of fibers in the random mat is from 40 to 99 Vol %, and an average number (N) of fibers in the carbon fiber bundles (A) satisfies the formula (2):

description='In-line Formulae' end='lead'critical single fiber number=600/D  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'2.0×105/D2≦N<8.0×105/D2  (2)description='In-line Formulae' end='tail'

    wherein D is an average fiber diameter (μm) of carbon fibers.

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Patent Owner(s)

Patent OwnerAddress
TEIJIN LIMITEDOSAKA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hagihara, Katsuyuki Matsuyama, JP 10 132
Ohki, Takeru Matsuyama, JP 16 83
Sonoda, Naoaki Matsuyama, JP 14 126

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