Title:
PREPREG, PREPREG LAMINATE, AND FIBER-REINFORCED COMPOSITE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/059599
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a prepreg which is suitable for producing a fiber-reinforced composite material in a short period of time without using an autoclave, can produce a fiber-reinforced composite material in which the occurrence of voids is suppressed and excellent impact resistance is achieved, and has excellent handling properties; and a fiber-reinforced composite material using the prepreg. This prepreg is a prepreg in which a reinforcing fiber [A] arranged in layers is partially impregnated with an epoxy resin composition containing an epoxy resin [B] and a curing agent [C], wherein the impregnation rate φ is 30-95%, and a thermoplastic resin [D] insoluble in the epoxy resin [B] is unevenly distributed on both surfaces of the prepreg. In addition, in the layers of the reinforcing fiber [A], epoxy resin composition-unimpregnated portions are localized on one surface of the prepreg, and the localization parameter σ, which defines the degree of localization, is in the range of 0.10<σ<0.45.
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Inventors:
YAMANE TAKUYA (JP)
SATO NARUMICHI (JP)
KAWAMOTO SHIORI (JP)
TABAYASHI MIYUKI (JP)
SATO NARUMICHI (JP)
KAWAMOTO SHIORI (JP)
TABAYASHI MIYUKI (JP)
Application Number:
PCT/JP2019/035730
Publication Date:
March 26, 2020
Filing Date:
September 11, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J5/24
Domestic Patent References:
| WO2018181254A1 | 2018-10-04 | |||
| WO1994016003A1 | 1994-07-21 |
Foreign References:
| JP2007276249A | 2007-10-25 | |||
| JP2015515502A | 2015-05-28 | |||
| US6139942A | 2000-10-31 | |||
| JPH10231372A | 1998-09-02 | |||
| JPH01104624A | 1989-04-21 | |||
| JPH0269566A | 1990-03-08 | |||
| JPH04292634A | 1992-10-16 | |||
| JPH0232843A | 1990-02-02 |
Other References:
See also references of EP 3835343A4
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