Title:
METHOD FOR PRODUCING FIBER-REINFORCED RESIN
Document Type and Number:
WIPO Patent Application WO/2019/188195
Kind Code:
A1
Abstract:
In order to provide a fiber-reinforced resin which is effective in reducing burrs while avoiding problems such as incomplete filling or incomplete resin impregnation, and exhibits excellent mechanical properties and cavity filling properties, even when press-molding a three-dimensional shape having a thick section and/or a change in thickness caused by a projection or the like, this method for producing a fiber-reinforced resin by press-molding a preform of a prepreg comprising reinforcing fibers and a heat-curable resin is characterized: by including (a) a preform preparation step for preparing a preform, (b) a positioning/preheating step for positioning and preheating the preform in a die, (c) a pressing step for deforming the preform into the product shape, and (d) a curing step for applying pressure to while curing the preform; and in that the degree αe of curing of the heat-curable resin in a specific section of the preform at the time of starting the (c) pressing step is greater than the degree αi of curing of the heat-curable resin in regions other than the specific section of the preform at said time.
Inventors:
TSUMURA YUSUKE (JP)
SAOTOME TSUYOSHI (JP)
HOSOKAWA NAOFUMI (JP)
SAOTOME TSUYOSHI (JP)
HOSOKAWA NAOFUMI (JP)
Application Number:
PCT/JP2019/009714
Publication Date:
October 03, 2019
Filing Date:
March 11, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B29C43/58; B29C43/52; B29C70/16; B29C70/42; B29K101/10; B29K105/08
Domestic Patent References:
| WO2008093757A1 | 2008-08-07 |
Foreign References:
| JP2014108612A | 2014-06-12 | |||
| JPH10138269A | 1998-05-26 | |||
| JP2008073875A | 2008-04-03 | |||
| JP2005335200A | 2005-12-08 | |||
| JP2015143343A | 2015-08-06 | |||
| JP2008068532A | 2008-03-27 | |||
| US20170073460A1 | 2017-03-16 |
Other References:
See also references of EP 3778172A4
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