公开(公告)号：US11377531B2

公开(公告)日：2022-07-05

申请号：US16646898

申请日：2018-11-14

Applicant: TORAY INDUSTRIES, INC.

Inventor： Bon Aizawa ,  Ryuichi Kitahara ,  Takahiro Nishimura ,  Shinji Kochi ,  Naoya Takeda

IPC: C08J5/24 ,  C08G59/50 ,  C08J5/04

Abstract: A prepreg contains components [A] to [E], wherein 85% by mass or more of the component [E] is present in a range within 9% of the average thickness of the prepreg from each surface of the prepreg, and a range within 7% of the average thickness of the prepreg from each surface of the prepreg is composed of a first resin composition containing components [B] to [E]. [A] a carbon fiber, [B] an epoxy resin having two or more glycidyl groups in one molecule, [C] an aromatic amine compound, [D] a thermoplastic resin having a polyarylether skeleton, and [E] particles having a number average primary particle size of 5 to 50 μm, having a content ratio (% by mass) of thermoplastic resin and thermosetting resin of 95:5 to 70:30.

公开(公告)号：US20240199831A1

公开(公告)日：2024-06-20

申请号：US17909821

申请日：2021-03-24

Applicant: Toray Industries, Inc.

Inventor： Junichi Aoki ,  Takayuki Fujiwara ,  Shinji Kochi ,  Daisuke Kido ,  Naoya Takeda ,  Bon Aizawa

IPC: C08J5/24 ,  C08L63/00

CPC classification number: C08J5/243 ,  C08L63/00 ,  C08J2363/02 ,  C08J2471/08 ,  C08J2481/06

Abstract: Provided is a prepreg including reinforced fibers and a resin composition, in which when an average thickness of the prepreg is designated as D, a loss tangent tanδ at a slit processing temperature when the resin composition present in a portion located at a depth of D/10 from a surface of the prepreg is evaluated using an 8-mm plate at 50 rad/s or more is designated as y, and a water absorption amount when the prepreg collected in a size of 100×100 mm is immersed in 5-mm water for 5 minutes is designated as x (hereinafter, referred to as water pickup evaluation), a relationship of Formula 1 below is satisfied. Provided is a prepreg that provides a slit tape having excellent processability and quality, which is suitably used for producing a fiber-reinforced composite material using an automatic lamination device.