Method of vacuum-assisted RTM

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United States of America Patent

PATENT NO 8753469
APP PUB NO 20100108245A1
SERIAL NO

12531724

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Abstract

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A method of vacuum-assisted RTM includes disposing a resin distribution medium on one surface of a reinforcing-fiber substrate, covering the whole with a bag material, reducing the pressure inside the bag material, and injecting a resin into the resin distribution medium to distribute the resin substantially in in-plane directions and then impregnate the resin into the reinforcing-fiber substrate in the thickness direction. The method is characterized in that the flow resistance of the resin distribution medium itself during resin distribution is changed in in-plane directions of the reinforcing-fiber substrate, in accordance with a difference in fiber weight per unit area or density between parts to be impregnated with resin of the reinforcing-fiber substrate present in a plane direction of the reinforcing-fiber substrate, or in accordance with a difference in distance from a resin impregnation initiation part to a resin impregnation completion part between parts to be impregnated with resin of the reinforcing-fiber substrate present in a plane direction of the reinforcing-fiber substrate.

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Patent Owner(s)

Patent OwnerAddress
TORAY INDUSTRIES INC (100%)1-1 NIHONBASHI-MUROMACHI 2-CHOME CHUO-KU TOKYO 103-8666

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mizobata, Masumi Ehime, JP 1 13
Nishiyama, Shigeru Aichi, JP 50 318
Odani, Hiroshi Ehime, JP 12 162
Takeda, Fumihito Aichi, JP 5 21

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