部分分繊繊維束とその製造方法、および部分分繊繊維束を用いた繊維強化樹脂成形材料とその製造方法

Japanese Patent JP7001995

B2

A partially separated fiber bundle that comprises separation-processed sections and not-separation-processed sections that are alternately formed along the lengthwise direction of a fiber bundle that comprises a plurality of single fibers, wherein the separation-processed sections comprise a plurality of separated bundles. The content of the not-separation-processed sections is 3% or more and 50% or less of the partially separated fiber bundle. A production method for a partially separated fiber bundle, wherein there is a specific relationship between: a separation processing time t1 during which a separation means is penetrated, and a time t2 from the separation means being removed to being penetrated again into a fiber bundle. A fiber-reinforced resin molding material that uses the partially separated fiber bundle, and a production method for the fiber-reinforced resin molding material that uses the partially separated fiber bundle. The present invention can provide a partially separated fiber bundle that is optimal for manufacturing a molding material. The present invention also makes it possible to exhibit: the flowability when a fiber-reinforced resin molding material that uses the partially separated fiber bundle is used for molding; and the mechanical properties of a molded article, at a good balance.

Tetsuya Motohashi
Takashi Hashimoto
Katsuhiro Miyoshi
Yoshihiro Kawahara
Suzuki Ho
Tomoma Sato

JP2017535843A

January 20, 2022

June 01, 2017

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TORAY INDUSTRIES,INC.

D02J1/18; C08J5/04; D06H7/00

JP2006219780A
JP2011241494A

WO2016043037A1
WO2017006989A1
WO2016136812A1
WO2016104154A1
WO2017159263A1

Ban Toshimitsu
Koichi Hosoda

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