PREPREG AND PRODUCTION METHOD THEREFOR

Title:

PREPREG AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2018/003694

Kind Code:

A1

Abstract:

In this prepreg, a resin layer containing a thermoset resin and a thermoplastic resin is present on at least one of the surfaces of a fiber layer containing a thermoset resin and non-continuous carbon fibers oriented in one direction. The fiber mass of the carbon fiber contained in the prepreg is 120 to 300g/m2. The resin content percentage by mass with respect to the total mass of the prepreg is 25 to 50%. If three layers of the prepreg are layered, the middle prepreg is pulled out, and the inter-layer frictional coefficients at the prepreg-to-prepreg contact surfaces are measured under the conditions of 0.2 mm/min pull-out speed, 0.08 MPa vertical stress, and 1 mm pull-out length, in a temperature range of 40 to 80°C at 10°C intervals, a temperature at which the inter-layer frictional coefficient is 0.05 or lower exists within the temperature range of 40 to 80°C. The prepreg provided by the invention allows a wrinkle-free pre-form to be produced, and, when turned into carbon-fiber reinforced plastic, exhibits satisfactory mechanical properties.

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Inventors:

NAITO YUTA (JP)
KAWAMOTO SHIORI (JP)
SATO NARUMICHI (JP)
TAKETA ICHIRO (JP)
FUJITA YUZO (JP)
KARAKI TAKUYA (JP)

Application Number:

PCT/JP2017/023199

Publication Date:

January 04, 2018

Filing Date:

June 23, 2017

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

C08J5/24; B29C70/14; B32B27/04

Domestic Patent References:

WO2008038591A1	2008-04-03
WO2016111190A1	2016-07-14
WO2017110991A1	2017-06-29

Foreign References:

JPH01104624A	1989-04-21
JP2007217665A	2007-08-30
JP2006169541A	2006-06-29
JP2003026768A	2003-01-29

Other References: