公开(公告)号：US20220162407A1

公开(公告)日：2022-05-26

申请号：US17441498

申请日：2020-03-27

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Kazuki NAKATSUKA

IPC: C08J5/24 ,  D06M15/55 ,  D06M23/08

Abstract: [Problem]
Provided is a method for producing an opened fibre bundle which has a good opened state, excellent resin impregnation properties, and excellent compatibility with a matrix resin, with high productivity.
[Problem to be Solved]
Disclosed is an opened carbon fibre bundle, wherein particles having a volume average particle size D50 of 1 μm to 13 μm and a volume average particle size D90 of 13 μm or less are comprised in a carbon fibre bundle and a method for producing an opened carbon fibre bundle, comprising the step of bringing a carbon fibre bundle into contact with a fibre opening solution comprising the particles and an organic solvent.

公开(公告)号：US20220145528A1

公开(公告)日：2022-05-12

申请号：US17441514

申请日：2020-03-27

Applicant: SEKISUI CHEMICAL CO., LTD.

Inventor： Kazuki NAKATSUKA

IPC: D06M11/74 ,  D06M11/45 ,  D06M11/79 ,  D06M15/55 ,  D06M23/08 ,  C08J5/04

Abstract: [Problem]
Provided is a method for producing an opened fibre bundle which enables the production of an opened fibre bundle having a good opened state, excellent resin impregnation properties, and excellent compatibility with a matrix resin.
[Problem to be Solved]
Disclosed is a method for producing an opened carbon fibre bundle, comprising the step of bringing a carbon fibre bundle comprising a plurality of carbon fibres to which a sizing agent is attached into contact with a fibre opening solution comprising particles having an average particle size (d50) of 1 μm to 30 μm and an organic solvent.