Title:
PREPREG, MOLDED ARTICLE, AND INTEGRALLY MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2021/131347
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: a prepreg which is heat-weldable to a member including a thermoplastic resin in injection molding or press molding, and in which, due to the loss tangent tan δ curve of a thermosetting resin having a specific peak measured by a dynamic viscoelasticity measurement method (DMA method), appropriate flexibility and adhesiveness are obtained, the prepreg has excellent formability to a complex die surface and adhesion to the die surface, there is no position shift of the prepreg, and the prepreg is capable of efficient reinforcement/stiffening in the desired location; and an integrally molded article, and the present invention relates mainly to a prepreg including (A) reinforcing fibers, (B) a thermosetting resin, and (C) a thermoplastic resin, the thermoplastic resin (C) being present on the surface of one side of a layer in which the reinforcing fibers (A) are impregnated with the thermosetting resin (B), and the loss tangent tan δ curve of the thermosetting resin (B) measured by a dynamic viscoelasticity measurement method (DMA method) having a peak in the range of 30-100°C inclusive.
Inventors:
ONODERA MIHO (JP)
TAKEBE YOSHIKI (JP)
KONISHI DAISUKE (JP)
NAITO YUTA (JP)
NAKAYAMA YOSHIFUMI (JP)
HONMA MASATO (JP)
TAKEBE YOSHIKI (JP)
KONISHI DAISUKE (JP)
NAITO YUTA (JP)
NAKAYAMA YOSHIFUMI (JP)
HONMA MASATO (JP)
Application Number:
PCT/JP2020/041509
Publication Date:
July 01, 2021
Filing Date:
November 06, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B29B11/16; B32B27/04; B29K105/08
Domestic Patent References:
| WO2012011487A1 | 2012-01-26 | |||
| WO2005082982A1 | 2005-09-09 | |||
| WO2019208586A2 | 2019-10-31 |
Foreign References:
| JP2007092072A | 2007-04-12 | |||
| JP2006049878A | 2006-02-16 | |||
| JP2004315743A | 2004-11-11 | |||
| JP2008007618A | 2008-01-17 | |||
| JP2018161801A | 2018-10-18 | |||
| JPH10138354A | 1998-05-26 | |||
| JPH044107A | 1992-01-08 | |||
| JPH08259713A | 1996-10-08 |
Other References:
See also references of EP 4082738A1
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